2b44f56202
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non-modular build and remove symbol_get usage net: enetc: use EXPORT_SYMBOL_GPL for enetc_phc_index rtc: ds1685: use EXPORT_SYMBOL_GPL for ds1685_rtc_poweroff modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules USB: serial: option: add Quectel EM05G variant (0x030e) USB: serial: option: add FOXCONN T99W368/T99W373 product HID: wacom: remove the battery when the EKR is off staging: rtl8712: fix race condition Bluetooth: btsdio: fix use after free bug in btsdio_remove due to race condition serial: sc16is7xx: fix bug when first setting GPIO direction firmware: stratix10-svc: Fix an NULL vs IS_ERR() bug in probe fsi: master-ast-cf: Add MODULE_FIRMWARE macro nilfs2: fix general protection fault in nilfs_lookup_dirty_data_buffers() nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse pinctrl: amd: Don't show `Invalid config param` errors 9p: virtio: make sure 'offs' is initialized in zc_request ASoC: da7219: Flush pending AAD IRQ when suspending ASoC: da7219: Check for failure reading AAD IRQ events ethernet: atheros: fix return value check in atl1c_tso_csum() vxlan: generalize vxlan_parse_gpe_hdr and remove unused args m68k: Fix invalid .section syntax s390/dasd: use correct number of retries for ERP requests s390/dasd: fix hanging device after request requeue fs/nls: make load_nls() take a const parameter ASoc: codecs: ES8316: Fix DMIC config ASoC: atmel: Fix the 8K sample parameter in I2SC master platform/x86: intel: hid: Always call BTNL ACPI method platform/x86: huawei-wmi: Silence ambient light sensor security: keys: perform capable check only on privileged operations clk: fixed-mmio: make COMMON_CLK_FIXED_MMIO depend on HAS_IOMEM net: usb: qmi_wwan: add Quectel EM05GV2 idmaengine: make FSL_EDMA and INTEL_IDMA64 depends on HAS_IOMEM scsi: qedi: Fix potential deadlock on &qedi_percpu->p_work_lock netlabel: fix shift wrapping bug in netlbl_catmap_setlong() bnx2x: fix page fault following EEH recovery sctp: handle invalid error codes without calling BUG() cifs: add a warning when the in-flight count goes negative scsi: storvsc: Always set no_report_opcodes ALSA: seq: oss: Fix racy open/close of MIDI devices platform/mellanox: Fix mlxbf-tmfifo not handling all virtio CONSOLE notifications net: Avoid address overwrite in kernel_connect powerpc/32s: Fix assembler warning about r0 udf: Check consistency of Space Bitmap Descriptor udf: Handle error when adding extent to a file Revert "net: macsec: preserve ingress frame ordering" reiserfs: Check the return value from __getblk() eventfd: Export eventfd_ctx_do_read() eventfd: prevent underflow for eventfd semaphores new helper: lookup_positive_unlocked() fs: Fix error checking for d_hash_and_lookup() tmpfs: verify {g,u}id mount options correctly OPP: Fix passing 0 to PTR_ERR in _opp_attach_genpd() x86/asm: Make more symbols local x86/boot: Annotate local functions x86/decompressor: Don't rely on upper 32 bits of GPRs being preserved perf/imx_ddr: don't enable counter0 if none of 4 counters are used cpufreq: powernow-k8: Use related_cpus instead of cpus in driver.exit() bpf: Clear the probe_addr for uprobe tcp: tcp_enter_quickack_mode() should be static regmap: rbtree: Use alloc_flags for memory allocations spi: tegra20-sflash: fix to check return value of platform_get_irq() in tegra_sflash_probe() can: gs_usb: gs_usb_receive_bulk_callback(): count RX overflow errors also in case of OOM wifi: mwifiex: Fix OOB and integer underflow when rx packets mwifiex: switch from 'pci_' to 'dma_' API wifi: mwifiex: fix error recovery in PCIE buffer descriptor management crypto: stm32 - Properly handle pm_runtime_get failing Bluetooth: nokia: fix value check in nokia_bluetooth_serdev_probe() crypto: caam - fix unchecked return value error hwrng: iproc-rng200 - use semicolons rather than commas to separate statements hwrng: iproc-rng200 - Implement suspend and resume calls lwt: Fix return values of BPF xmit ops lwt: Check LWTUNNEL_XMIT_CONTINUE strictly fs: ocfs2: namei: check return value of ocfs2_add_entry() wifi: mwifiex: fix memory leak in mwifiex_histogram_read() wifi: mwifiex: Fix missed return in oob checks failed path wifi: ath9k: fix races between ath9k_wmi_cmd and ath9k_wmi_ctrl_rx wifi: ath9k: protect WMI command response buffer replacement with a lock wifi: mwifiex: avoid possible NULL skb pointer dereference wifi: ath9k: use IS_ERR() with debugfs_create_dir() net: arcnet: Do not call kfree_skb() under local_irq_disable() mlxsw: i2c: Fix chunk size setting in output mailbox buffer mlxsw: i2c: Limit single transaction buffer size net/sched: sch_hfsc: Ensure inner classes have fsc curve netrom: Deny concurrent connect(). drm/bridge: tc358764: Fix debug print parameter order quota: avoid increasing DQST_LOOKUPS when iterating over dirty/inuse list quota: factor out dquot_write_dquot() quota: rename dquot_active() to inode_quota_active() quota: add new helper dquot_active() quota: fix dqput() to follow the guarantees dquot_srcu should provide drm/amdgpu: avoid integer overflow warning in amdgpu_device_resize_fb_bar() ARM: dts: BCM53573: Drop nonexistent "default-off" LED trigger ARM: dts: BCM53573: Add cells sizes to PCIe node ARM: dts: BCM53573: Use updated "spi-gpio" binding properties drm/etnaviv: fix dumping of active MMU context ARM: dts: s3c6410: move fixed clocks under root node in Mini6410 ARM: dts: s3c6410: align node SROM bus node name with dtschema in Mini6410 ARM: dts: s3c64xx: align pinctrl with dtschema ARM: dts: samsung: s3c6410-mini6410: correct ethernet reg addresses (split) ARM: dts: s5pv210: add RTC 32 KHz clock in SMDKV210 ARM: dts: s5pv210: use defines for IRQ flags in SMDKV210 ARM: dts: s5pv210: correct ethernet unit address in SMDKV210 ARM: dts: s5pv210: add dummy 5V regulator for backlight on SMDKv210 ARM: dts: samsung: s5pv210-smdkv210: correct ethernet reg addresses (split) drm: adv7511: Fix low refresh rate register for ADV7533/5 ARM: dts: BCM53573: Fix Ethernet info for Luxul devices arm64: dts: qcom: sdm845: Add missing RPMh power domain to GCC drm/amdgpu: Update min() to min_t() in 'amdgpu_info_ioctl' md/bitmap: don't set max_write_behind if there is no write mostly device md/md-bitmap: hold 'reconfig_mutex' in backlog_store() drm/tegra: Remove superfluous error messages around platform_get_irq() drm/tegra: dpaux: Fix incorrect return value of platform_get_irq of: unittest: fix null pointer dereferencing in of_unittest_find_node_by_name() drm/armada: Fix off-by-one error in armada_overlay_get_property() drm/panel: simple: Add missing connector type and pixel format for AUO T215HVN01 ima: Remove deprecated IMA_TRUSTED_KEYRING Kconfig drm/msm/mdp5: Don't leak some plane state smackfs: Prevent underflow in smk_set_cipso() audit: fix possible soft lockup in __audit_inode_child() drm/mediatek: Fix potential memory leak if vmap() fail of: unittest: Fix overlay type in apply/revert check ALSA: ac97: Fix possible error value of *rac97 ipmi:ssif: Add check for kstrdup ipmi:ssif: Fix a memory leak when scanning for an adapter drivers: clk: keystone: Fix parameter judgment in _of_pll_clk_init() clk: sunxi-ng: Modify mismatched function name PCI: Mark NVIDIA T4 GPUs to avoid bus reset PCI: pciehp: Use RMW accessors for changing LNKCTL PCI/ASPM: Use RMW accessors for changing LNKCTL clk: imx: composite-8m: fix clock pauses when set_rate would be a no-op powerpc/fadump: reset dump area size if fadump memory reserve fails PCI: Add #defines for Enter Compliance, Transmit Margin drm/amdgpu: Correct Transmit Margin masks drm/amdgpu: Replace numbers with PCI_EXP_LNKCTL2 definitions drm/amdgpu: Prefer pcie_capability_read_word() drm/amdgpu: Use RMW accessors for changing LNKCTL drm/radeon: Correct Transmit Margin masks drm/radeon: Replace numbers with PCI_EXP_LNKCTL2 definitions drm/radeon: Prefer pcie_capability_read_word() drm/radeon: Use RMW accessors for changing LNKCTL wifi: ath10k: Use RMW accessors for changing LNKCTL nfs/blocklayout: Use the passed in gfp flags powerpc/iommu: Fix notifiers being shared by PCI and VIO buses jfs: validate max amount of blocks before allocation. fs: lockd: avoid possible wrong NULL parameter NFSD: da_addr_body field missing in some GETDEVICEINFO replies NFS: Guard against READDIR loop when entry names exceed MAXNAMELEN media: v4l2-fwnode: fix v4l2_fwnode_parse_link handling media: v4l2-fwnode: simplify v4l2_fwnode_parse_link media: v4l2-core: Fix a potential resource leak in v4l2_fwnode_parse_link() drivers: usb: smsusb: fix error handling code in smsusb_init_device media: dib7000p: Fix potential division by zero media: dvb-usb: m920x: Fix a potential memory leak in m920x_i2c_xfer() media: cx24120: Add retval check for cx24120_message_send() media: mediatek: vcodec: Return NULL if no vdec_fb is found usb: phy: mxs: fix getting wrong state with mxs_phy_is_otg_host() scsi: iscsi: Add strlen() check in iscsi_if_set{_host}_param() scsi: be2iscsi: Add length check when parsing nlattrs scsi: qla4xxx: Add length check when parsing nlattrs serial: sprd: getting port index via serial aliases only serial: sprd: remove redundant sprd_port cleanup serial: sprd: Assign sprd_port after initialized to avoid wrong access serial: sprd: Fix DMA buffer leak issue x86/APM: drop the duplicate APM_MINOR_DEV macro scsi: qedf: Do not touch __user pointer in qedf_dbg_stop_io_on_error_cmd_read() directly scsi: qedf: Do not touch __user pointer in qedf_dbg_debug_cmd_read() directly scsi: qedf: Do not touch __user pointer in qedf_dbg_fp_int_cmd_read() directly coresight: tmc: Explicit type conversions to prevent integer overflow dma-buf/sync_file: Fix docs syntax driver core: test_async: fix an error code IB/uverbs: Fix an potential error pointer dereference iommu/vt-d: Fix to flush cache of PASID directory table media: go7007: Remove redundant if statement USB: gadget: f_mass_storage: Fix unused variable warning media: i2c: ov5640: Configure HVP lines in s_power callback media: ov5640: Enable MIPI interface in ov5640_set_power_mipi() media: i2c: ov2680: Set V4L2_CTRL_FLAG_MODIFY_LAYOUT on flips media: ov2680: Remove auto-gain and auto-exposure controls media: ov2680: Fix ov2680_bayer_order() media: ov2680: Fix vflip / hflip set functions media: ov2680: Fix regulators being left enabled on ov2680_power_on() errors scsi: core: Use 32-bit hostnum in scsi_host_lookup() scsi: fcoe: Fix potential deadlock on &fip->ctlr_lock serial: tegra: handle clk prepare error in tegra_uart_hw_init() amba: bus: fix refcount leak Revert "IB/isert: Fix incorrect release of isert connection" RDMA/siw: Balance the reference of cep->kref in the error path RDMA/siw: Correct wrong debug message HID: logitech-dj: Fix error handling in logi_dj_recv_switch_to_dj_mode() HID: multitouch: Correct devm device reference for hidinput input_dev name x86/speculation: Mark all Skylake CPUs as vulnerable to GDS tracing: Fix race issue between cpu buffer write and swap phy/rockchip: inno-hdmi: use correct vco_div_5 macro on rk3328 phy/rockchip: inno-hdmi: round fractal pixclock in rk3328 recalc_rate phy/rockchip: inno-hdmi: do not power on rk3328 post pll on reg write rpmsg: glink: Add check for kstrdup mtd: rawnand: fsmc: handle clk prepare error in fsmc_nand_resume() um: Fix hostaudio build errors dmaengine: ste_dma40: Add missing IRQ check in d40_probe cpufreq: Fix the race condition while updating the transition_task of policy virtio_ring: fix avail_wrap_counter in virtqueue_add_packed igmp: limit igmpv3_newpack() packet size to IP_MAX_MTU netfilter: ipset: add the missing IP_SET_HASH_WITH_NET0 macro for ip_set_hash_netportnet.c netfilter: xt_u32: validate user space input netfilter: xt_sctp: validate the flag_info count skbuff: skb_segment, Call zero copy functions before using skbuff frags igb: set max size RX buffer when store bad packet is enabled PM / devfreq: Fix leak in devfreq_dev_release() ALSA: pcm: Fix missing fixup call in compat hw_refine ioctl ipmi_si: fix a memleak in try_smi_init() ARM: OMAP2+: Fix -Warray-bounds warning in _pwrdm_state_switch() backlight/gpio_backlight: Compare against struct fb_info.device backlight/bd6107: Compare against struct fb_info.device backlight/lv5207lp: Compare against struct fb_info.device xtensa: PMU: fix base address for the newer hardware media: dvb: symbol fixup for dvb_attach() ntb: Drop packets when qp link is down ntb: Clean up tx tail index on link down ntb: Fix calculation ntb_transport_tx_free_entry() Revert "PCI: Mark NVIDIA T4 GPUs to avoid bus reset" procfs: block chmod on /proc/thread-self/comm parisc: Fix /proc/cpuinfo output for lscpu dlm: fix plock lookup when using multiple lockspaces dccp: Fix out of bounds access in DCCP error handler X.509: if signature is unsupported skip validation net: handle ARPHRD_PPP in dev_is_mac_header_xmit() fsverity: skip PKCS#7 parser when keyring is empty pstore/ram: Check start of empty przs during init s390/ipl: add missing secure/has_secure file to ipl type 'unknown' crypto: stm32 - fix loop iterating through scatterlist for DMA cpufreq: brcmstb-avs-cpufreq: Fix -Warray-bounds bug sc16is7xx: Set iobase to device index serial: sc16is7xx: fix broken port 0 uart init usb: typec: tcpci: clear the fault status bit udf: initialize newblock to 0 drm: fix double free for gbo in drm_gem_vram_init and drm_gem_vram_create net/ipv6: SKB symmetric hash should incorporate transport ports scsi: qla2xxx: fix inconsistent TMF timeout scsi: qla2xxx: Fix erroneous link up failure scsi: qla2xxx: Turn off noisy message log scsi: qla2xxx: Remove unsupported ql2xenabledif option fbdev/ep93xx-fb: Do not assign to struct fb_info.dev drm/ast: Fix DRAM init on AST2200 lib/test_meminit: allocate pages up to order MAX_ORDER parisc: led: Fix LAN receive and transmit LEDs parisc: led: Reduce CPU overhead for disk & lan LED computation clk: qcom: gcc-mdm9615: use proper parent for pll0_vote clock soc: qcom: qmi_encdec: Restrict string length in decode NFSv4/pnfs: minor fix for cleanup path in nfs4_get_device_info kconfig: fix possible buffer overflow perf annotate bpf: Don't enclose non-debug code with an assert() x86/virt: Drop unnecessary check on extended CPUID level in cpu_has_svm() perf top: Don't pass an ERR_PTR() directly to perf_session__delete() watchdog: intel-mid_wdt: add MODULE_ALIAS() to allow auto-load pwm: lpc32xx: Remove handling of PWM channels sctp: annotate data-races around sk->sk_wmem_queued ipv4: annotate data-races around fi->fib_dead net: read sk->sk_family once in sk_mc_loop() igb: disable virtualization features on 82580 veth: Fixing transmit return status for dropped packets net: ipv6/addrconf: avoid integer underflow in ipv6_create_tempaddr af_unix: Fix data-races around user->unix_inflight. af_unix: Fix data-race around unix_tot_inflight. af_unix: Fix data-races around sk->sk_shutdown. af_unix: Fix data race around sk->sk_err. net: sched: sch_qfq: Fix UAF in qfq_dequeue() kcm: Destroy mutex in kcm_exit_net() igc: Change IGC_MIN to allow set rx/tx value between 64 and 80 igbvf: Change IGBVF_MIN to allow set rx/tx value between 64 and 80 igb: Change IGB_MIN to allow set rx/tx value between 64 and 80 s390/zcrypt: don't leak memory if dev_set_name() fails idr: fix param name in idr_alloc_cyclic() doc ip_tunnels: use DEV_STATS_INC() netfilter: nfnetlink_osf: avoid OOB read net: hns3: fix the port information display when sfp is absent sh: boards: Fix CEU buffer size passed to dma_declare_coherent_memory() ata: sata_gemini: Add missing MODULE_DESCRIPTION ata: pata_ftide010: Add missing MODULE_DESCRIPTION fuse: nlookup missing decrement in fuse_direntplus_link btrfs: don't start transaction when joining with TRANS_JOIN_NOSTART btrfs: use the correct superblock to compare fsid in btrfs_validate_super mtd: rawnand: brcmnand: Fix crash during the panic_write mtd: rawnand: brcmnand: Fix potential out-of-bounds access in oob write mtd: rawnand: brcmnand: Fix potential false time out warning perf hists browser: Fix hierarchy mode header perf tools: Handle old data in PERF_RECORD_ATTR usb: typec: tcpm: Refactor tcpm_handle_vdm_request payload handling usb: typec: tcpm: Refactor tcpm_handle_vdm_request usb: typec: bus: verify partner exists in typec_altmode_attention ARM: dts: BCM5301X: Extend RAM to full 256MB for Linksys EA6500 V2 clk: imx8mm: Move 1443X/1416X PLL clock structure to common place net: ipv4: fix one memleak in __inet_del_ifa() net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc() net: ethernet: mtk_eth_soc: fix possible NULL pointer dereference in mtk_hwlro_get_fdir_all() r8152: check budget for r8152_poll() kcm: Fix memory leak in error path of kcm_sendmsg() platform/mellanox: mlxbf-tmfifo: Drop the Rx packet if no more descriptors mlxbf-tmfifo: sparse tags for config access platform/mellanox: mlxbf-tmfifo: Drop jumbo frames net/tls: do not free tls_rec on async operation in bpf_exec_tx_verdict() ixgbe: fix timestamp configuration code kcm: Fix error handling for SOCK_DGRAM in kcm_sendmsg(). drm/amd/display: Fix a bug when searching for insert_above_mpcc parisc: Drop loops_per_jiffy from per_cpu struct autofs: fix memory leak of waitqueues in autofs_catatonic_mode btrfs: output extra debug info if we failed to find an inline backref locks: fix KASAN: use-after-free in trace_event_raw_event_filelock_lock ACPICA: Add AML_NO_OPERAND_RESOLVE flag to Timer kernel/fork: beware of __put_task_struct() calling context ACPI: video: Add backlight=native DMI quirk for Lenovo Ideapad Z470 perf/smmuv3: Enable HiSilicon Erratum 162001900 quirk for HIP08/09 hw_breakpoint: fix single-stepping when using bpf_overflow_handler devlink: remove reload failed checks in params get/set callbacks wifi: ath9k: fix printk specifier wifi: mwifiex: fix fortify warning crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() tpm_tis: Resend command to recover from data transfer errors mmc: sdhci-esdhc-imx: improve ESDHC_FLAG_ERR010450 alx: fix OOB-read compiler warning wifi: mac80211_hwsim: drop short frames drm/exynos: fix a possible null-pointer dereference due to data race in exynos_drm_crtc_atomic_disable() bus: ti-sysc: Configure uart quirks for k3 SoC md: raid1: fix potential OOB in raid1_remove_disk() ext2: fix datatype of block number in ext2_xattr_set2() fs/jfs: prevent double-free in dbUnmount() after failed jfs_remount() jfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount powerpc/pseries: fix possible memory leak in ibmebus_bus_init() media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer media: dw2102: Fix null-ptr-deref in dw2102_i2c_transfer() media: af9005: Fix null-ptr-deref in af9005_i2c_xfer media: anysee: fix null-ptr-deref in anysee_master_xfer media: az6007: Fix null-ptr-deref in az6007_i2c_xfer() media: tuners: qt1010: replace BUG_ON with a regular error media: pci: cx23885: replace BUG with error return usb: gadget: fsl_qe_udc: validate endpoint index for ch9 udc scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() serial: cpm_uart: Avoid suspicious locking media: pci: ipu3-cio2: Initialise timing struct to avoid a compiler warning kobject: Add sanity check for kset->kobj.ktype in kset_register() tools features: Add feature test to check if libbfd has buildid support perf jevents: Make build dependency on test JSONs perf tools: Add an option to build without libbfd btrfs: move btrfs_pinned_by_swapfile prototype into volumes.h btrfs: add a helper to read the superblock metadata_uuid btrfs: compare the correct fsid/metadata_uuid in btrfs_validate_super selftests: tracing: Fix to unmount tracefs for recovering environment md/raid1: fix error: ISO C90 forbids mixed declarations attr: block mode changes of symlinks btrfs: fix lockdep splat and potential deadlock after failure running delayed items tracing: Have current_trace inc the trace array ref count tracing: Have option files inc the trace array ref count nfsd: fix change_info in NFSv4 RENAME replies tracefs: Add missing lockdown check to tracefs_create_dir() i2c: aspeed: Reset the i2c controller when timeout occurs scsi: megaraid_sas: Fix deadlock on firmware crashdump ext4: fix rec_len verify error mtd: rawnand: brcmnand: Fix ECC level field setting for v7.2 controller drm/amdgpu: fix amdgpu_cs_p1_user_fence net/sched: Retire rsvp classifier Linux 5.4.257 Change-Id: I99f6978fc0d802b5803005fe903a90aed315d88d Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2240 lines
58 KiB
C
2240 lines
58 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Generic OPP Interface
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*
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* Copyright (C) 2009-2010 Texas Instruments Incorporated.
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* Nishanth Menon
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* Romit Dasgupta
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* Kevin Hilman
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/clk.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/export.h>
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#include <linux/pm_domain.h>
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#include <linux/regulator/consumer.h>
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#include "opp.h"
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/*
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* The root of the list of all opp-tables. All opp_table structures branch off
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* from here, with each opp_table containing the list of opps it supports in
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* various states of availability.
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*/
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LIST_HEAD(opp_tables);
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/* Lock to allow exclusive modification to the device and opp lists */
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DEFINE_MUTEX(opp_table_lock);
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static struct opp_device *_find_opp_dev(const struct device *dev,
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struct opp_table *opp_table)
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{
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struct opp_device *opp_dev;
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list_for_each_entry(opp_dev, &opp_table->dev_list, node)
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if (opp_dev->dev == dev)
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return opp_dev;
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return NULL;
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}
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static struct opp_table *_find_opp_table_unlocked(struct device *dev)
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{
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struct opp_table *opp_table;
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bool found;
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list_for_each_entry(opp_table, &opp_tables, node) {
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mutex_lock(&opp_table->lock);
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found = !!_find_opp_dev(dev, opp_table);
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mutex_unlock(&opp_table->lock);
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if (found) {
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_get_opp_table_kref(opp_table);
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return opp_table;
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}
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}
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return ERR_PTR(-ENODEV);
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}
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/**
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* _find_opp_table() - find opp_table struct using device pointer
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* @dev: device pointer used to lookup OPP table
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*
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* Search OPP table for one containing matching device.
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*
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* Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or
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* -EINVAL based on type of error.
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*
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* The callers must call dev_pm_opp_put_opp_table() after the table is used.
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*/
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struct opp_table *_find_opp_table(struct device *dev)
|
|
{
|
|
struct opp_table *opp_table;
|
|
|
|
if (IS_ERR_OR_NULL(dev)) {
|
|
pr_err("%s: Invalid parameters\n", __func__);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
mutex_lock(&opp_table_lock);
|
|
opp_table = _find_opp_table_unlocked(dev);
|
|
mutex_unlock(&opp_table_lock);
|
|
|
|
return opp_table;
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp
|
|
* @opp: opp for which voltage has to be returned for
|
|
*
|
|
* Return: voltage in micro volt corresponding to the opp, else
|
|
* return 0
|
|
*
|
|
* This is useful only for devices with single power supply.
|
|
*/
|
|
unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
|
|
{
|
|
if (IS_ERR_OR_NULL(opp)) {
|
|
pr_err("%s: Invalid parameters\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
return opp->supplies[0].u_volt;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage);
|
|
|
|
/**
|
|
* dev_pm_opp_get_freq() - Gets the frequency corresponding to an available opp
|
|
* @opp: opp for which frequency has to be returned for
|
|
*
|
|
* Return: frequency in hertz corresponding to the opp, else
|
|
* return 0
|
|
*/
|
|
unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
|
|
{
|
|
if (IS_ERR_OR_NULL(opp) || !opp->available) {
|
|
pr_err("%s: Invalid parameters\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
return opp->rate;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
|
|
|
|
/**
|
|
* dev_pm_opp_get_level() - Gets the level corresponding to an available opp
|
|
* @opp: opp for which level value has to be returned for
|
|
*
|
|
* Return: level read from device tree corresponding to the opp, else
|
|
* return 0.
|
|
*/
|
|
unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
|
|
{
|
|
if (IS_ERR_OR_NULL(opp) || !opp->available) {
|
|
pr_err("%s: Invalid parameters\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
return opp->level;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_get_level);
|
|
|
|
/**
|
|
* dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not
|
|
* @opp: opp for which turbo mode is being verified
|
|
*
|
|
* Turbo OPPs are not for normal use, and can be enabled (under certain
|
|
* conditions) for short duration of times to finish high throughput work
|
|
* quickly. Running on them for longer times may overheat the chip.
|
|
*
|
|
* Return: true if opp is turbo opp, else false.
|
|
*/
|
|
bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
|
|
{
|
|
if (IS_ERR_OR_NULL(opp) || !opp->available) {
|
|
pr_err("%s: Invalid parameters\n", __func__);
|
|
return false;
|
|
}
|
|
|
|
return opp->turbo;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo);
|
|
|
|
/**
|
|
* dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds
|
|
* @dev: device for which we do this operation
|
|
*
|
|
* Return: This function returns the max clock latency in nanoseconds.
|
|
*/
|
|
unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
|
|
{
|
|
struct opp_table *opp_table;
|
|
unsigned long clock_latency_ns;
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return 0;
|
|
|
|
clock_latency_ns = opp_table->clock_latency_ns_max;
|
|
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return clock_latency_ns;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency);
|
|
|
|
/**
|
|
* dev_pm_opp_get_max_volt_latency() - Get max voltage latency in nanoseconds
|
|
* @dev: device for which we do this operation
|
|
*
|
|
* Return: This function returns the max voltage latency in nanoseconds.
|
|
*/
|
|
unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct dev_pm_opp *opp;
|
|
struct regulator *reg;
|
|
unsigned long latency_ns = 0;
|
|
int ret, i, count;
|
|
struct {
|
|
unsigned long min;
|
|
unsigned long max;
|
|
} *uV;
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return 0;
|
|
|
|
/* Regulator may not be required for the device */
|
|
if (!opp_table->regulators)
|
|
goto put_opp_table;
|
|
|
|
count = opp_table->regulator_count;
|
|
|
|
uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL);
|
|
if (!uV)
|
|
goto put_opp_table;
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
uV[i].min = ~0;
|
|
uV[i].max = 0;
|
|
|
|
list_for_each_entry(opp, &opp_table->opp_list, node) {
|
|
if (!opp->available)
|
|
continue;
|
|
|
|
if (opp->supplies[i].u_volt_min < uV[i].min)
|
|
uV[i].min = opp->supplies[i].u_volt_min;
|
|
if (opp->supplies[i].u_volt_max > uV[i].max)
|
|
uV[i].max = opp->supplies[i].u_volt_max;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&opp_table->lock);
|
|
|
|
/*
|
|
* The caller needs to ensure that opp_table (and hence the regulator)
|
|
* isn't freed, while we are executing this routine.
|
|
*/
|
|
for (i = 0; i < count; i++) {
|
|
reg = opp_table->regulators[i];
|
|
ret = regulator_set_voltage_time(reg, uV[i].min, uV[i].max);
|
|
if (ret > 0)
|
|
latency_ns += ret * 1000;
|
|
}
|
|
|
|
kfree(uV);
|
|
put_opp_table:
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return latency_ns;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency);
|
|
|
|
/**
|
|
* dev_pm_opp_get_max_transition_latency() - Get max transition latency in
|
|
* nanoseconds
|
|
* @dev: device for which we do this operation
|
|
*
|
|
* Return: This function returns the max transition latency, in nanoseconds, to
|
|
* switch from one OPP to other.
|
|
*/
|
|
unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
|
|
{
|
|
return dev_pm_opp_get_max_volt_latency(dev) +
|
|
dev_pm_opp_get_max_clock_latency(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency);
|
|
|
|
/**
|
|
* dev_pm_opp_get_suspend_opp_freq() - Get frequency of suspend opp in Hz
|
|
* @dev: device for which we do this operation
|
|
*
|
|
* Return: This function returns the frequency of the OPP marked as suspend_opp
|
|
* if one is available, else returns 0;
|
|
*/
|
|
unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
|
|
{
|
|
struct opp_table *opp_table;
|
|
unsigned long freq = 0;
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return 0;
|
|
|
|
if (opp_table->suspend_opp && opp_table->suspend_opp->available)
|
|
freq = dev_pm_opp_get_freq(opp_table->suspend_opp);
|
|
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return freq;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq);
|
|
|
|
int _get_opp_count(struct opp_table *opp_table)
|
|
{
|
|
struct dev_pm_opp *opp;
|
|
int count = 0;
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
|
|
list_for_each_entry(opp, &opp_table->opp_list, node) {
|
|
if (opp->available)
|
|
count++;
|
|
}
|
|
|
|
mutex_unlock(&opp_table->lock);
|
|
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_get_opp_count() - Get number of opps available in the opp table
|
|
* @dev: device for which we do this operation
|
|
*
|
|
* Return: This function returns the number of available opps if there are any,
|
|
* else returns 0 if none or the corresponding error value.
|
|
*/
|
|
int dev_pm_opp_get_opp_count(struct device *dev)
|
|
{
|
|
struct opp_table *opp_table;
|
|
int count;
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table)) {
|
|
count = PTR_ERR(opp_table);
|
|
dev_dbg(dev, "%s: OPP table not found (%d)\n",
|
|
__func__, count);
|
|
return count;
|
|
}
|
|
|
|
count = _get_opp_count(opp_table);
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return count;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count);
|
|
|
|
/**
|
|
* dev_pm_opp_find_freq_exact() - search for an exact frequency
|
|
* @dev: device for which we do this operation
|
|
* @freq: frequency to search for
|
|
* @available: true/false - match for available opp
|
|
*
|
|
* Return: Searches for exact match in the opp table and returns pointer to the
|
|
* matching opp if found, else returns ERR_PTR in case of error and should
|
|
* be handled using IS_ERR. Error return values can be:
|
|
* EINVAL: for bad pointer
|
|
* ERANGE: no match found for search
|
|
* ENODEV: if device not found in list of registered devices
|
|
*
|
|
* Note: available is a modifier for the search. if available=true, then the
|
|
* match is for exact matching frequency and is available in the stored OPP
|
|
* table. if false, the match is for exact frequency which is not available.
|
|
*
|
|
* This provides a mechanism to enable an opp which is not available currently
|
|
* or the opposite as well.
|
|
*
|
|
* The callers are required to call dev_pm_opp_put() for the returned OPP after
|
|
* use.
|
|
*/
|
|
struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
|
|
unsigned long freq,
|
|
bool available)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table)) {
|
|
int r = PTR_ERR(opp_table);
|
|
|
|
dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
|
|
return ERR_PTR(r);
|
|
}
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
|
|
list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
|
|
if (temp_opp->available == available &&
|
|
temp_opp->rate == freq) {
|
|
opp = temp_opp;
|
|
|
|
/* Increment the reference count of OPP */
|
|
dev_pm_opp_get(opp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&opp_table->lock);
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return opp;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact);
|
|
|
|
/**
|
|
* dev_pm_opp_find_level_exact() - search for an exact level
|
|
* @dev: device for which we do this operation
|
|
* @level: level to search for
|
|
*
|
|
* Return: Searches for exact match in the opp table and returns pointer to the
|
|
* matching opp if found, else returns ERR_PTR in case of error and should
|
|
* be handled using IS_ERR. Error return values can be:
|
|
* EINVAL: for bad pointer
|
|
* ERANGE: no match found for search
|
|
* ENODEV: if device not found in list of registered devices
|
|
*
|
|
* The callers are required to call dev_pm_opp_put() for the returned OPP after
|
|
* use.
|
|
*/
|
|
struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
|
|
unsigned int level)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table)) {
|
|
int r = PTR_ERR(opp_table);
|
|
|
|
dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
|
|
return ERR_PTR(r);
|
|
}
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
|
|
list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
|
|
if (temp_opp->level == level) {
|
|
opp = temp_opp;
|
|
|
|
/* Increment the reference count of OPP */
|
|
dev_pm_opp_get(opp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&opp_table->lock);
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return opp;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_exact);
|
|
|
|
static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table,
|
|
unsigned long *freq)
|
|
{
|
|
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
|
|
list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
|
|
if (temp_opp->available && temp_opp->rate >= *freq) {
|
|
opp = temp_opp;
|
|
*freq = opp->rate;
|
|
|
|
/* Increment the reference count of OPP */
|
|
dev_pm_opp_get(opp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&opp_table->lock);
|
|
|
|
return opp;
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_find_freq_ceil() - Search for an rounded ceil freq
|
|
* @dev: device for which we do this operation
|
|
* @freq: Start frequency
|
|
*
|
|
* Search for the matching ceil *available* OPP from a starting freq
|
|
* for a device.
|
|
*
|
|
* Return: matching *opp and refreshes *freq accordingly, else returns
|
|
* ERR_PTR in case of error and should be handled using IS_ERR. Error return
|
|
* values can be:
|
|
* EINVAL: for bad pointer
|
|
* ERANGE: no match found for search
|
|
* ENODEV: if device not found in list of registered devices
|
|
*
|
|
* The callers are required to call dev_pm_opp_put() for the returned OPP after
|
|
* use.
|
|
*/
|
|
struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
|
|
unsigned long *freq)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct dev_pm_opp *opp;
|
|
|
|
if (!dev || !freq) {
|
|
dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return ERR_CAST(opp_table);
|
|
|
|
opp = _find_freq_ceil(opp_table, freq);
|
|
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return opp;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil);
|
|
|
|
/**
|
|
* dev_pm_opp_find_freq_floor() - Search for a rounded floor freq
|
|
* @dev: device for which we do this operation
|
|
* @freq: Start frequency
|
|
*
|
|
* Search for the matching floor *available* OPP from a starting freq
|
|
* for a device.
|
|
*
|
|
* Return: matching *opp and refreshes *freq accordingly, else returns
|
|
* ERR_PTR in case of error and should be handled using IS_ERR. Error return
|
|
* values can be:
|
|
* EINVAL: for bad pointer
|
|
* ERANGE: no match found for search
|
|
* ENODEV: if device not found in list of registered devices
|
|
*
|
|
* The callers are required to call dev_pm_opp_put() for the returned OPP after
|
|
* use.
|
|
*/
|
|
struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
|
|
unsigned long *freq)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
|
|
|
|
if (!dev || !freq) {
|
|
dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return ERR_CAST(opp_table);
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
|
|
list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
|
|
if (temp_opp->available) {
|
|
/* go to the next node, before choosing prev */
|
|
if (temp_opp->rate > *freq)
|
|
break;
|
|
else
|
|
opp = temp_opp;
|
|
}
|
|
}
|
|
|
|
/* Increment the reference count of OPP */
|
|
if (!IS_ERR(opp))
|
|
dev_pm_opp_get(opp);
|
|
mutex_unlock(&opp_table->lock);
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
if (!IS_ERR(opp))
|
|
*freq = opp->rate;
|
|
|
|
return opp;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
|
|
|
|
/**
|
|
* dev_pm_opp_find_freq_ceil_by_volt() - Find OPP with highest frequency for
|
|
* target voltage.
|
|
* @dev: Device for which we do this operation.
|
|
* @u_volt: Target voltage.
|
|
*
|
|
* Search for OPP with highest (ceil) frequency and has voltage <= u_volt.
|
|
*
|
|
* Return: matching *opp, else returns ERR_PTR in case of error which should be
|
|
* handled using IS_ERR.
|
|
*
|
|
* Error return values can be:
|
|
* EINVAL: bad parameters
|
|
*
|
|
* The callers are required to call dev_pm_opp_put() for the returned OPP after
|
|
* use.
|
|
*/
|
|
struct dev_pm_opp *dev_pm_opp_find_freq_ceil_by_volt(struct device *dev,
|
|
unsigned long u_volt)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
|
|
|
|
if (!dev || !u_volt) {
|
|
dev_err(dev, "%s: Invalid argument volt=%lu\n", __func__,
|
|
u_volt);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return ERR_CAST(opp_table);
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
|
|
list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
|
|
if (temp_opp->available) {
|
|
if (temp_opp->supplies[0].u_volt > u_volt)
|
|
break;
|
|
opp = temp_opp;
|
|
}
|
|
}
|
|
|
|
/* Increment the reference count of OPP */
|
|
if (!IS_ERR(opp))
|
|
dev_pm_opp_get(opp);
|
|
|
|
mutex_unlock(&opp_table->lock);
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return opp;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_by_volt);
|
|
|
|
static int _set_opp_voltage(struct device *dev, struct regulator *reg,
|
|
struct dev_pm_opp_supply *supply)
|
|
{
|
|
int ret;
|
|
|
|
/* Regulator not available for device */
|
|
if (IS_ERR(reg)) {
|
|
dev_dbg(dev, "%s: regulator not available: %ld\n", __func__,
|
|
PTR_ERR(reg));
|
|
return 0;
|
|
}
|
|
|
|
dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__,
|
|
supply->u_volt_min, supply->u_volt, supply->u_volt_max);
|
|
|
|
ret = regulator_set_voltage_triplet(reg, supply->u_volt_min,
|
|
supply->u_volt, supply->u_volt_max);
|
|
if (ret)
|
|
dev_err(dev, "%s: failed to set voltage (%lu %lu %lu mV): %d\n",
|
|
__func__, supply->u_volt_min, supply->u_volt,
|
|
supply->u_volt_max, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline int _generic_set_opp_clk_only(struct device *dev, struct clk *clk,
|
|
unsigned long freq)
|
|
{
|
|
int ret;
|
|
|
|
ret = clk_set_rate(clk, freq);
|
|
if (ret) {
|
|
dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,
|
|
ret);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int _generic_set_opp_regulator(const struct opp_table *opp_table,
|
|
struct device *dev,
|
|
unsigned long old_freq,
|
|
unsigned long freq,
|
|
struct dev_pm_opp_supply *old_supply,
|
|
struct dev_pm_opp_supply *new_supply)
|
|
{
|
|
struct regulator *reg = opp_table->regulators[0];
|
|
int ret;
|
|
|
|
/* This function only supports single regulator per device */
|
|
if (WARN_ON(opp_table->regulator_count > 1)) {
|
|
dev_err(dev, "multiple regulators are not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Scaling up? Scale voltage before frequency */
|
|
if (freq >= old_freq) {
|
|
ret = _set_opp_voltage(dev, reg, new_supply);
|
|
if (ret)
|
|
goto restore_voltage;
|
|
}
|
|
|
|
/* Change frequency */
|
|
ret = _generic_set_opp_clk_only(dev, opp_table->clk, freq);
|
|
if (ret)
|
|
goto restore_voltage;
|
|
|
|
/* Scaling down? Scale voltage after frequency */
|
|
if (freq < old_freq) {
|
|
ret = _set_opp_voltage(dev, reg, new_supply);
|
|
if (ret)
|
|
goto restore_freq;
|
|
}
|
|
|
|
return 0;
|
|
|
|
restore_freq:
|
|
if (_generic_set_opp_clk_only(dev, opp_table->clk, old_freq))
|
|
dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n",
|
|
__func__, old_freq);
|
|
restore_voltage:
|
|
/* This shouldn't harm even if the voltages weren't updated earlier */
|
|
if (old_supply)
|
|
_set_opp_voltage(dev, reg, old_supply);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int _set_opp_custom(const struct opp_table *opp_table,
|
|
struct device *dev, unsigned long old_freq,
|
|
unsigned long freq,
|
|
struct dev_pm_opp_supply *old_supply,
|
|
struct dev_pm_opp_supply *new_supply)
|
|
{
|
|
struct dev_pm_set_opp_data *data;
|
|
int size;
|
|
|
|
data = opp_table->set_opp_data;
|
|
data->regulators = opp_table->regulators;
|
|
data->regulator_count = opp_table->regulator_count;
|
|
data->clk = opp_table->clk;
|
|
data->dev = dev;
|
|
|
|
data->old_opp.rate = old_freq;
|
|
size = sizeof(*old_supply) * opp_table->regulator_count;
|
|
if (!old_supply)
|
|
memset(data->old_opp.supplies, 0, size);
|
|
else
|
|
memcpy(data->old_opp.supplies, old_supply, size);
|
|
|
|
data->new_opp.rate = freq;
|
|
memcpy(data->new_opp.supplies, new_supply, size);
|
|
|
|
return opp_table->set_opp(data);
|
|
}
|
|
|
|
/* This is only called for PM domain for now */
|
|
static int _set_required_opps(struct device *dev,
|
|
struct opp_table *opp_table,
|
|
struct dev_pm_opp *opp)
|
|
{
|
|
struct opp_table **required_opp_tables = opp_table->required_opp_tables;
|
|
struct device **genpd_virt_devs = opp_table->genpd_virt_devs;
|
|
unsigned int pstate;
|
|
int i, ret = 0;
|
|
|
|
if (!required_opp_tables)
|
|
return 0;
|
|
|
|
/* Single genpd case */
|
|
if (!genpd_virt_devs) {
|
|
pstate = likely(opp) ? opp->required_opps[0]->pstate : 0;
|
|
ret = dev_pm_genpd_set_performance_state(dev, pstate);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to set performance state of %s: %d (%d)\n",
|
|
dev_name(dev), pstate, ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* Multiple genpd case */
|
|
|
|
/*
|
|
* Acquire genpd_virt_dev_lock to make sure we don't use a genpd_dev
|
|
* after it is freed from another thread.
|
|
*/
|
|
mutex_lock(&opp_table->genpd_virt_dev_lock);
|
|
|
|
for (i = 0; i < opp_table->required_opp_count; i++) {
|
|
pstate = likely(opp) ? opp->required_opps[i]->pstate : 0;
|
|
|
|
if (!genpd_virt_devs[i])
|
|
continue;
|
|
|
|
ret = dev_pm_genpd_set_performance_state(genpd_virt_devs[i], pstate);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to set performance rate of %s: %d (%d)\n",
|
|
dev_name(genpd_virt_devs[i]), pstate, ret);
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&opp_table->genpd_virt_dev_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_set_rate() - Configure new OPP based on frequency
|
|
* @dev: device for which we do this operation
|
|
* @target_freq: frequency to achieve
|
|
*
|
|
* This configures the power-supplies to the levels specified by the OPP
|
|
* corresponding to the target_freq, and programs the clock to a value <=
|
|
* target_freq, as rounded by clk_round_rate(). Device wanting to run at fmax
|
|
* provided by the opp, should have already rounded to the target OPP's
|
|
* frequency.
|
|
*/
|
|
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
|
|
{
|
|
struct opp_table *opp_table;
|
|
unsigned long freq, old_freq, temp_freq;
|
|
struct dev_pm_opp *old_opp, *opp;
|
|
struct clk *clk;
|
|
int ret;
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table)) {
|
|
dev_err(dev, "%s: device opp doesn't exist\n", __func__);
|
|
return PTR_ERR(opp_table);
|
|
}
|
|
|
|
if (unlikely(!target_freq)) {
|
|
if (opp_table->required_opp_tables) {
|
|
ret = _set_required_opps(dev, opp_table, NULL);
|
|
} else {
|
|
dev_err(dev, "target frequency can't be 0\n");
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
goto put_opp_table;
|
|
}
|
|
|
|
clk = opp_table->clk;
|
|
if (IS_ERR(clk)) {
|
|
dev_err(dev, "%s: No clock available for the device\n",
|
|
__func__);
|
|
ret = PTR_ERR(clk);
|
|
goto put_opp_table;
|
|
}
|
|
|
|
freq = clk_round_rate(clk, target_freq);
|
|
if ((long)freq <= 0)
|
|
freq = target_freq;
|
|
|
|
old_freq = clk_get_rate(clk);
|
|
|
|
/* Return early if nothing to do */
|
|
if (old_freq == freq) {
|
|
if (!opp_table->required_opp_tables && !opp_table->regulators) {
|
|
dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n",
|
|
__func__, freq);
|
|
ret = 0;
|
|
goto put_opp_table;
|
|
}
|
|
}
|
|
|
|
temp_freq = old_freq;
|
|
old_opp = _find_freq_ceil(opp_table, &temp_freq);
|
|
if (IS_ERR(old_opp)) {
|
|
dev_err(dev, "%s: failed to find current OPP for freq %lu (%ld)\n",
|
|
__func__, old_freq, PTR_ERR(old_opp));
|
|
}
|
|
|
|
temp_freq = freq;
|
|
opp = _find_freq_ceil(opp_table, &temp_freq);
|
|
if (IS_ERR(opp)) {
|
|
ret = PTR_ERR(opp);
|
|
dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n",
|
|
__func__, freq, ret);
|
|
goto put_old_opp;
|
|
}
|
|
|
|
dev_dbg(dev, "%s: switching OPP: %lu Hz --> %lu Hz\n", __func__,
|
|
old_freq, freq);
|
|
|
|
/* Scaling up? Configure required OPPs before frequency */
|
|
if (freq >= old_freq) {
|
|
ret = _set_required_opps(dev, opp_table, opp);
|
|
if (ret)
|
|
goto put_opp;
|
|
}
|
|
|
|
if (opp_table->set_opp) {
|
|
ret = _set_opp_custom(opp_table, dev, old_freq, freq,
|
|
IS_ERR(old_opp) ? NULL : old_opp->supplies,
|
|
opp->supplies);
|
|
} else if (opp_table->regulators) {
|
|
ret = _generic_set_opp_regulator(opp_table, dev, old_freq, freq,
|
|
IS_ERR(old_opp) ? NULL : old_opp->supplies,
|
|
opp->supplies);
|
|
} else {
|
|
/* Only frequency scaling */
|
|
ret = _generic_set_opp_clk_only(dev, clk, freq);
|
|
}
|
|
|
|
/* Scaling down? Configure required OPPs after frequency */
|
|
if (!ret && freq < old_freq) {
|
|
ret = _set_required_opps(dev, opp_table, opp);
|
|
if (ret)
|
|
dev_err(dev, "Failed to set required opps: %d\n", ret);
|
|
}
|
|
|
|
put_opp:
|
|
dev_pm_opp_put(opp);
|
|
put_old_opp:
|
|
if (!IS_ERR(old_opp))
|
|
dev_pm_opp_put(old_opp);
|
|
put_opp_table:
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate);
|
|
|
|
/* OPP-dev Helpers */
|
|
static void _remove_opp_dev(struct opp_device *opp_dev,
|
|
struct opp_table *opp_table)
|
|
{
|
|
opp_debug_unregister(opp_dev, opp_table);
|
|
list_del(&opp_dev->node);
|
|
kfree(opp_dev);
|
|
}
|
|
|
|
static struct opp_device *_add_opp_dev_unlocked(const struct device *dev,
|
|
struct opp_table *opp_table)
|
|
{
|
|
struct opp_device *opp_dev;
|
|
|
|
opp_dev = kzalloc(sizeof(*opp_dev), GFP_KERNEL);
|
|
if (!opp_dev)
|
|
return NULL;
|
|
|
|
/* Initialize opp-dev */
|
|
opp_dev->dev = dev;
|
|
|
|
list_add(&opp_dev->node, &opp_table->dev_list);
|
|
|
|
/* Create debugfs entries for the opp_table */
|
|
opp_debug_register(opp_dev, opp_table);
|
|
|
|
return opp_dev;
|
|
}
|
|
|
|
struct opp_device *_add_opp_dev(const struct device *dev,
|
|
struct opp_table *opp_table)
|
|
{
|
|
struct opp_device *opp_dev;
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
opp_dev = _add_opp_dev_unlocked(dev, opp_table);
|
|
mutex_unlock(&opp_table->lock);
|
|
|
|
return opp_dev;
|
|
}
|
|
|
|
static struct opp_table *_allocate_opp_table(struct device *dev, int index)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct opp_device *opp_dev;
|
|
int ret;
|
|
|
|
/*
|
|
* Allocate a new OPP table. In the infrequent case where a new
|
|
* device is needed to be added, we pay this penalty.
|
|
*/
|
|
opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL);
|
|
if (!opp_table)
|
|
return NULL;
|
|
|
|
mutex_init(&opp_table->lock);
|
|
mutex_init(&opp_table->genpd_virt_dev_lock);
|
|
INIT_LIST_HEAD(&opp_table->dev_list);
|
|
|
|
/* Mark regulator count uninitialized */
|
|
opp_table->regulator_count = -1;
|
|
|
|
opp_dev = _add_opp_dev(dev, opp_table);
|
|
if (!opp_dev) {
|
|
kfree(opp_table);
|
|
return NULL;
|
|
}
|
|
|
|
_of_init_opp_table(opp_table, dev, index);
|
|
|
|
/* Find clk for the device */
|
|
opp_table->clk = clk_get(dev, NULL);
|
|
if (IS_ERR(opp_table->clk)) {
|
|
ret = PTR_ERR(opp_table->clk);
|
|
if (ret != -EPROBE_DEFER)
|
|
dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__,
|
|
ret);
|
|
}
|
|
|
|
BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head);
|
|
INIT_LIST_HEAD(&opp_table->opp_list);
|
|
kref_init(&opp_table->kref);
|
|
kref_init(&opp_table->list_kref);
|
|
|
|
/* Secure the device table modification */
|
|
list_add(&opp_table->node, &opp_tables);
|
|
return opp_table;
|
|
}
|
|
|
|
void _get_opp_table_kref(struct opp_table *opp_table)
|
|
{
|
|
kref_get(&opp_table->kref);
|
|
}
|
|
|
|
static struct opp_table *_opp_get_opp_table(struct device *dev, int index)
|
|
{
|
|
struct opp_table *opp_table;
|
|
|
|
/* Hold our table modification lock here */
|
|
mutex_lock(&opp_table_lock);
|
|
|
|
opp_table = _find_opp_table_unlocked(dev);
|
|
if (!IS_ERR(opp_table))
|
|
goto unlock;
|
|
|
|
opp_table = _managed_opp(dev, index);
|
|
if (opp_table) {
|
|
if (!_add_opp_dev_unlocked(dev, opp_table)) {
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
opp_table = NULL;
|
|
}
|
|
goto unlock;
|
|
}
|
|
|
|
opp_table = _allocate_opp_table(dev, index);
|
|
|
|
unlock:
|
|
mutex_unlock(&opp_table_lock);
|
|
|
|
return opp_table;
|
|
}
|
|
|
|
struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
|
|
{
|
|
return _opp_get_opp_table(dev, 0);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table);
|
|
|
|
struct opp_table *dev_pm_opp_get_opp_table_indexed(struct device *dev,
|
|
int index)
|
|
{
|
|
return _opp_get_opp_table(dev, index);
|
|
}
|
|
|
|
static void _opp_table_kref_release(struct kref *kref)
|
|
{
|
|
struct opp_table *opp_table = container_of(kref, struct opp_table, kref);
|
|
struct opp_device *opp_dev, *temp;
|
|
|
|
/* Drop the lock as soon as we can */
|
|
list_del(&opp_table->node);
|
|
mutex_unlock(&opp_table_lock);
|
|
|
|
_of_clear_opp_table(opp_table);
|
|
|
|
/* Release clk */
|
|
if (!IS_ERR(opp_table->clk))
|
|
clk_put(opp_table->clk);
|
|
|
|
WARN_ON(!list_empty(&opp_table->opp_list));
|
|
|
|
list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node) {
|
|
/*
|
|
* The OPP table is getting removed, drop the performance state
|
|
* constraints.
|
|
*/
|
|
if (opp_table->genpd_performance_state)
|
|
dev_pm_genpd_set_performance_state((struct device *)(opp_dev->dev), 0);
|
|
|
|
_remove_opp_dev(opp_dev, opp_table);
|
|
}
|
|
|
|
mutex_destroy(&opp_table->genpd_virt_dev_lock);
|
|
mutex_destroy(&opp_table->lock);
|
|
kfree(opp_table);
|
|
}
|
|
|
|
void _opp_remove_all_static(struct opp_table *opp_table)
|
|
{
|
|
struct dev_pm_opp *opp, *tmp;
|
|
|
|
list_for_each_entry_safe(opp, tmp, &opp_table->opp_list, node) {
|
|
if (!opp->dynamic)
|
|
dev_pm_opp_put(opp);
|
|
}
|
|
|
|
opp_table->parsed_static_opps = false;
|
|
}
|
|
|
|
static void _opp_table_list_kref_release(struct kref *kref)
|
|
{
|
|
struct opp_table *opp_table = container_of(kref, struct opp_table,
|
|
list_kref);
|
|
|
|
_opp_remove_all_static(opp_table);
|
|
mutex_unlock(&opp_table_lock);
|
|
}
|
|
|
|
void _put_opp_list_kref(struct opp_table *opp_table)
|
|
{
|
|
kref_put_mutex(&opp_table->list_kref, _opp_table_list_kref_release,
|
|
&opp_table_lock);
|
|
}
|
|
|
|
void dev_pm_opp_put_opp_table(struct opp_table *opp_table)
|
|
{
|
|
kref_put_mutex(&opp_table->kref, _opp_table_kref_release,
|
|
&opp_table_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table);
|
|
|
|
void _opp_free(struct dev_pm_opp *opp)
|
|
{
|
|
kfree(opp);
|
|
}
|
|
|
|
static void _opp_kref_release(struct dev_pm_opp *opp,
|
|
struct opp_table *opp_table)
|
|
{
|
|
/*
|
|
* Notify the changes in the availability of the operable
|
|
* frequency/voltage list.
|
|
*/
|
|
blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_REMOVE, opp);
|
|
_of_opp_free_required_opps(opp_table, opp);
|
|
opp_debug_remove_one(opp);
|
|
list_del(&opp->node);
|
|
kfree(opp);
|
|
}
|
|
|
|
static void _opp_kref_release_unlocked(struct kref *kref)
|
|
{
|
|
struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref);
|
|
struct opp_table *opp_table = opp->opp_table;
|
|
|
|
_opp_kref_release(opp, opp_table);
|
|
}
|
|
|
|
static void _opp_kref_release_locked(struct kref *kref)
|
|
{
|
|
struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref);
|
|
struct opp_table *opp_table = opp->opp_table;
|
|
|
|
_opp_kref_release(opp, opp_table);
|
|
mutex_unlock(&opp_table->lock);
|
|
}
|
|
|
|
void dev_pm_opp_get(struct dev_pm_opp *opp)
|
|
{
|
|
kref_get(&opp->kref);
|
|
}
|
|
|
|
void dev_pm_opp_put(struct dev_pm_opp *opp)
|
|
{
|
|
kref_put_mutex(&opp->kref, _opp_kref_release_locked,
|
|
&opp->opp_table->lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_put);
|
|
|
|
static void dev_pm_opp_put_unlocked(struct dev_pm_opp *opp)
|
|
{
|
|
kref_put(&opp->kref, _opp_kref_release_unlocked);
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_remove() - Remove an OPP from OPP table
|
|
* @dev: device for which we do this operation
|
|
* @freq: OPP to remove with matching 'freq'
|
|
*
|
|
* This function removes an opp from the opp table.
|
|
*/
|
|
void dev_pm_opp_remove(struct device *dev, unsigned long freq)
|
|
{
|
|
struct dev_pm_opp *opp;
|
|
struct opp_table *opp_table;
|
|
bool found = false;
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return;
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
|
|
list_for_each_entry(opp, &opp_table->opp_list, node) {
|
|
if (opp->rate == freq) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&opp_table->lock);
|
|
|
|
if (found) {
|
|
dev_pm_opp_put(opp);
|
|
|
|
/* Drop the reference taken by dev_pm_opp_add() */
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
} else {
|
|
dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n",
|
|
__func__, freq);
|
|
}
|
|
|
|
/* Drop the reference taken by _find_opp_table() */
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
|
|
|
|
/**
|
|
* dev_pm_opp_remove_all_dynamic() - Remove all dynamically created OPPs
|
|
* @dev: device for which we do this operation
|
|
*
|
|
* This function removes all dynamically created OPPs from the opp table.
|
|
*/
|
|
void dev_pm_opp_remove_all_dynamic(struct device *dev)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct dev_pm_opp *opp, *temp;
|
|
int count = 0;
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return;
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
list_for_each_entry_safe(opp, temp, &opp_table->opp_list, node) {
|
|
if (opp->dynamic) {
|
|
dev_pm_opp_put_unlocked(opp);
|
|
count++;
|
|
}
|
|
}
|
|
mutex_unlock(&opp_table->lock);
|
|
|
|
/* Drop the references taken by dev_pm_opp_add() */
|
|
while (count--)
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
/* Drop the reference taken by _find_opp_table() */
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_remove_all_dynamic);
|
|
|
|
struct dev_pm_opp *_opp_allocate(struct opp_table *table)
|
|
{
|
|
struct dev_pm_opp *opp;
|
|
int count, supply_size;
|
|
|
|
/* Allocate space for at least one supply */
|
|
count = table->regulator_count > 0 ? table->regulator_count : 1;
|
|
supply_size = sizeof(*opp->supplies) * count;
|
|
|
|
/* allocate new OPP node and supplies structures */
|
|
opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL);
|
|
if (!opp)
|
|
return NULL;
|
|
|
|
/* Put the supplies at the end of the OPP structure as an empty array */
|
|
opp->supplies = (struct dev_pm_opp_supply *)(opp + 1);
|
|
INIT_LIST_HEAD(&opp->node);
|
|
|
|
return opp;
|
|
}
|
|
|
|
static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
|
|
struct opp_table *opp_table)
|
|
{
|
|
struct regulator *reg;
|
|
int i;
|
|
|
|
if (!opp_table->regulators)
|
|
return true;
|
|
|
|
for (i = 0; i < opp_table->regulator_count; i++) {
|
|
reg = opp_table->regulators[i];
|
|
|
|
if (!regulator_is_supported_voltage(reg,
|
|
opp->supplies[i].u_volt_min,
|
|
opp->supplies[i].u_volt_max)) {
|
|
pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
|
|
__func__, opp->supplies[i].u_volt_min,
|
|
opp->supplies[i].u_volt_max);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int _opp_is_duplicate(struct device *dev, struct dev_pm_opp *new_opp,
|
|
struct opp_table *opp_table,
|
|
struct list_head **head)
|
|
{
|
|
struct dev_pm_opp *opp;
|
|
|
|
/*
|
|
* Insert new OPP in order of increasing frequency and discard if
|
|
* already present.
|
|
*
|
|
* Need to use &opp_table->opp_list in the condition part of the 'for'
|
|
* loop, don't replace it with head otherwise it will become an infinite
|
|
* loop.
|
|
*/
|
|
list_for_each_entry(opp, &opp_table->opp_list, node) {
|
|
if (new_opp->rate > opp->rate) {
|
|
*head = &opp->node;
|
|
continue;
|
|
}
|
|
|
|
if (new_opp->rate < opp->rate)
|
|
return 0;
|
|
|
|
/* Duplicate OPPs */
|
|
dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",
|
|
__func__, opp->rate, opp->supplies[0].u_volt,
|
|
opp->available, new_opp->rate,
|
|
new_opp->supplies[0].u_volt, new_opp->available);
|
|
|
|
/* Should we compare voltages for all regulators here ? */
|
|
return opp->available &&
|
|
new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? -EBUSY : -EEXIST;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns:
|
|
* 0: On success. And appropriate error message for duplicate OPPs.
|
|
* -EBUSY: For OPP with same freq/volt and is available. The callers of
|
|
* _opp_add() must return 0 if they receive -EBUSY from it. This is to make
|
|
* sure we don't print error messages unnecessarily if different parts of
|
|
* kernel try to initialize the OPP table.
|
|
* -EEXIST: For OPP with same freq but different volt or is unavailable. This
|
|
* should be considered an error by the callers of _opp_add().
|
|
*/
|
|
int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
|
|
struct opp_table *opp_table, bool rate_not_available)
|
|
{
|
|
struct list_head *head;
|
|
int ret;
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
head = &opp_table->opp_list;
|
|
|
|
if (likely(!rate_not_available)) {
|
|
ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
|
|
if (ret) {
|
|
mutex_unlock(&opp_table->lock);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
list_add(&new_opp->node, head);
|
|
mutex_unlock(&opp_table->lock);
|
|
|
|
new_opp->opp_table = opp_table;
|
|
kref_init(&new_opp->kref);
|
|
|
|
opp_debug_create_one(new_opp, opp_table);
|
|
|
|
if (!_opp_supported_by_regulators(new_opp, opp_table)) {
|
|
new_opp->available = false;
|
|
dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n",
|
|
__func__, new_opp->rate);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* _opp_add_v1() - Allocate a OPP based on v1 bindings.
|
|
* @opp_table: OPP table
|
|
* @dev: device for which we do this operation
|
|
* @freq: Frequency in Hz for this OPP
|
|
* @u_volt: Voltage in uVolts for this OPP
|
|
* @dynamic: Dynamically added OPPs.
|
|
*
|
|
* This function adds an opp definition to the opp table and returns status.
|
|
* The opp is made available by default and it can be controlled using
|
|
* dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove.
|
|
*
|
|
* NOTE: "dynamic" parameter impacts OPPs added by the dev_pm_opp_of_add_table
|
|
* and freed by dev_pm_opp_of_remove_table.
|
|
*
|
|
* Return:
|
|
* 0 On success OR
|
|
* Duplicate OPPs (both freq and volt are same) and opp->available
|
|
* -EEXIST Freq are same and volt are different OR
|
|
* Duplicate OPPs (both freq and volt are same) and !opp->available
|
|
* -ENOMEM Memory allocation failure
|
|
*/
|
|
int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
|
|
unsigned long freq, long u_volt, bool dynamic)
|
|
{
|
|
struct dev_pm_opp *new_opp;
|
|
unsigned long tol;
|
|
int ret;
|
|
|
|
new_opp = _opp_allocate(opp_table);
|
|
if (!new_opp)
|
|
return -ENOMEM;
|
|
|
|
/* populate the opp table */
|
|
new_opp->rate = freq;
|
|
tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
|
|
new_opp->supplies[0].u_volt = u_volt;
|
|
new_opp->supplies[0].u_volt_min = u_volt - tol;
|
|
new_opp->supplies[0].u_volt_max = u_volt + tol;
|
|
new_opp->available = true;
|
|
new_opp->dynamic = dynamic;
|
|
|
|
ret = _opp_add(dev, new_opp, opp_table, false);
|
|
if (ret) {
|
|
/* Don't return error for duplicate OPPs */
|
|
if (ret == -EBUSY)
|
|
ret = 0;
|
|
goto free_opp;
|
|
}
|
|
|
|
/*
|
|
* Notify the changes in the availability of the operable
|
|
* frequency/voltage list.
|
|
*/
|
|
blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp);
|
|
return 0;
|
|
|
|
free_opp:
|
|
_opp_free(new_opp);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_set_supported_hw() - Set supported platforms
|
|
* @dev: Device for which supported-hw has to be set.
|
|
* @versions: Array of hierarchy of versions to match.
|
|
* @count: Number of elements in the array.
|
|
*
|
|
* This is required only for the V2 bindings, and it enables a platform to
|
|
* specify the hierarchy of versions it supports. OPP layer will then enable
|
|
* OPPs, which are available for those versions, based on its 'opp-supported-hw'
|
|
* property.
|
|
*/
|
|
struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
|
|
const u32 *versions, unsigned int count)
|
|
{
|
|
struct opp_table *opp_table;
|
|
|
|
opp_table = dev_pm_opp_get_opp_table(dev);
|
|
if (!opp_table)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/* Make sure there are no concurrent readers while updating opp_table */
|
|
WARN_ON(!list_empty(&opp_table->opp_list));
|
|
|
|
/* Another CPU that shares the OPP table has set the property ? */
|
|
if (opp_table->supported_hw)
|
|
return opp_table;
|
|
|
|
opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions),
|
|
GFP_KERNEL);
|
|
if (!opp_table->supported_hw) {
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
opp_table->supported_hw_count = count;
|
|
|
|
return opp_table;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw);
|
|
|
|
/**
|
|
* dev_pm_opp_put_supported_hw() - Releases resources blocked for supported hw
|
|
* @opp_table: OPP table returned by dev_pm_opp_set_supported_hw().
|
|
*
|
|
* This is required only for the V2 bindings, and is called for a matching
|
|
* dev_pm_opp_set_supported_hw(). Until this is called, the opp_table structure
|
|
* will not be freed.
|
|
*/
|
|
void dev_pm_opp_put_supported_hw(struct opp_table *opp_table)
|
|
{
|
|
/* Make sure there are no concurrent readers while updating opp_table */
|
|
WARN_ON(!list_empty(&opp_table->opp_list));
|
|
|
|
kfree(opp_table->supported_hw);
|
|
opp_table->supported_hw = NULL;
|
|
opp_table->supported_hw_count = 0;
|
|
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw);
|
|
|
|
/**
|
|
* dev_pm_opp_set_prop_name() - Set prop-extn name
|
|
* @dev: Device for which the prop-name has to be set.
|
|
* @name: name to postfix to properties.
|
|
*
|
|
* This is required only for the V2 bindings, and it enables a platform to
|
|
* specify the extn to be used for certain property names. The properties to
|
|
* which the extension will apply are opp-microvolt and opp-microamp. OPP core
|
|
* should postfix the property name with -<name> while looking for them.
|
|
*/
|
|
struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
|
|
{
|
|
struct opp_table *opp_table;
|
|
|
|
opp_table = dev_pm_opp_get_opp_table(dev);
|
|
if (!opp_table)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/* Make sure there are no concurrent readers while updating opp_table */
|
|
WARN_ON(!list_empty(&opp_table->opp_list));
|
|
|
|
/* Another CPU that shares the OPP table has set the property ? */
|
|
if (opp_table->prop_name)
|
|
return opp_table;
|
|
|
|
opp_table->prop_name = kstrdup(name, GFP_KERNEL);
|
|
if (!opp_table->prop_name) {
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
return opp_table;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name);
|
|
|
|
/**
|
|
* dev_pm_opp_put_prop_name() - Releases resources blocked for prop-name
|
|
* @opp_table: OPP table returned by dev_pm_opp_set_prop_name().
|
|
*
|
|
* This is required only for the V2 bindings, and is called for a matching
|
|
* dev_pm_opp_set_prop_name(). Until this is called, the opp_table structure
|
|
* will not be freed.
|
|
*/
|
|
void dev_pm_opp_put_prop_name(struct opp_table *opp_table)
|
|
{
|
|
/* Make sure there are no concurrent readers while updating opp_table */
|
|
WARN_ON(!list_empty(&opp_table->opp_list));
|
|
|
|
kfree(opp_table->prop_name);
|
|
opp_table->prop_name = NULL;
|
|
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
|
|
|
|
static int _allocate_set_opp_data(struct opp_table *opp_table)
|
|
{
|
|
struct dev_pm_set_opp_data *data;
|
|
int len, count = opp_table->regulator_count;
|
|
|
|
if (WARN_ON(!opp_table->regulators))
|
|
return -EINVAL;
|
|
|
|
/* space for set_opp_data */
|
|
len = sizeof(*data);
|
|
|
|
/* space for old_opp.supplies and new_opp.supplies */
|
|
len += 2 * sizeof(struct dev_pm_opp_supply) * count;
|
|
|
|
data = kzalloc(len, GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->old_opp.supplies = (void *)(data + 1);
|
|
data->new_opp.supplies = data->old_opp.supplies + count;
|
|
|
|
opp_table->set_opp_data = data;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void _free_set_opp_data(struct opp_table *opp_table)
|
|
{
|
|
kfree(opp_table->set_opp_data);
|
|
opp_table->set_opp_data = NULL;
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_set_regulators() - Set regulator names for the device
|
|
* @dev: Device for which regulator name is being set.
|
|
* @names: Array of pointers to the names of the regulator.
|
|
* @count: Number of regulators.
|
|
*
|
|
* In order to support OPP switching, OPP layer needs to know the name of the
|
|
* device's regulators, as the core would be required to switch voltages as
|
|
* well.
|
|
*
|
|
* This must be called before any OPPs are initialized for the device.
|
|
*/
|
|
struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
|
|
const char * const names[],
|
|
unsigned int count)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct regulator *reg;
|
|
int ret, i;
|
|
|
|
opp_table = dev_pm_opp_get_opp_table(dev);
|
|
if (!opp_table)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/* This should be called before OPPs are initialized */
|
|
if (WARN_ON(!list_empty(&opp_table->opp_list))) {
|
|
ret = -EBUSY;
|
|
goto err;
|
|
}
|
|
|
|
/* Another CPU that shares the OPP table has set the regulators ? */
|
|
if (opp_table->regulators)
|
|
return opp_table;
|
|
|
|
opp_table->regulators = kmalloc_array(count,
|
|
sizeof(*opp_table->regulators),
|
|
GFP_KERNEL);
|
|
if (!opp_table->regulators) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0; i < count; i++) {
|
|
reg = regulator_get_optional(dev, names[i]);
|
|
if (IS_ERR(reg)) {
|
|
ret = PTR_ERR(reg);
|
|
if (ret != -EPROBE_DEFER)
|
|
dev_err(dev, "%s: no regulator (%s) found: %d\n",
|
|
__func__, names[i], ret);
|
|
goto free_regulators;
|
|
}
|
|
|
|
opp_table->regulators[i] = reg;
|
|
}
|
|
|
|
opp_table->regulator_count = count;
|
|
|
|
/* Allocate block only once to pass to set_opp() routines */
|
|
ret = _allocate_set_opp_data(opp_table);
|
|
if (ret)
|
|
goto free_regulators;
|
|
|
|
return opp_table;
|
|
|
|
free_regulators:
|
|
while (i != 0)
|
|
regulator_put(opp_table->regulators[--i]);
|
|
|
|
kfree(opp_table->regulators);
|
|
opp_table->regulators = NULL;
|
|
opp_table->regulator_count = -1;
|
|
err:
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators);
|
|
|
|
/**
|
|
* dev_pm_opp_put_regulators() - Releases resources blocked for regulator
|
|
* @opp_table: OPP table returned from dev_pm_opp_set_regulators().
|
|
*/
|
|
void dev_pm_opp_put_regulators(struct opp_table *opp_table)
|
|
{
|
|
int i;
|
|
|
|
if (!opp_table->regulators)
|
|
goto put_opp_table;
|
|
|
|
/* Make sure there are no concurrent readers while updating opp_table */
|
|
WARN_ON(!list_empty(&opp_table->opp_list));
|
|
|
|
for (i = opp_table->regulator_count - 1; i >= 0; i--)
|
|
regulator_put(opp_table->regulators[i]);
|
|
|
|
_free_set_opp_data(opp_table);
|
|
|
|
kfree(opp_table->regulators);
|
|
opp_table->regulators = NULL;
|
|
opp_table->regulator_count = -1;
|
|
|
|
put_opp_table:
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators);
|
|
|
|
/**
|
|
* dev_pm_opp_set_clkname() - Set clk name for the device
|
|
* @dev: Device for which clk name is being set.
|
|
* @name: Clk name.
|
|
*
|
|
* In order to support OPP switching, OPP layer needs to get pointer to the
|
|
* clock for the device. Simple cases work fine without using this routine (i.e.
|
|
* by passing connection-id as NULL), but for a device with multiple clocks
|
|
* available, the OPP core needs to know the exact name of the clk to use.
|
|
*
|
|
* This must be called before any OPPs are initialized for the device.
|
|
*/
|
|
struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
|
|
{
|
|
struct opp_table *opp_table;
|
|
int ret;
|
|
|
|
opp_table = dev_pm_opp_get_opp_table(dev);
|
|
if (!opp_table)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/* This should be called before OPPs are initialized */
|
|
if (WARN_ON(!list_empty(&opp_table->opp_list))) {
|
|
ret = -EBUSY;
|
|
goto err;
|
|
}
|
|
|
|
/* Already have default clk set, free it */
|
|
if (!IS_ERR(opp_table->clk))
|
|
clk_put(opp_table->clk);
|
|
|
|
/* Find clk for the device */
|
|
opp_table->clk = clk_get(dev, name);
|
|
if (IS_ERR(opp_table->clk)) {
|
|
ret = PTR_ERR(opp_table->clk);
|
|
if (ret != -EPROBE_DEFER) {
|
|
dev_err(dev, "%s: Couldn't find clock: %d\n", __func__,
|
|
ret);
|
|
}
|
|
goto err;
|
|
}
|
|
|
|
return opp_table;
|
|
|
|
err:
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_set_clkname);
|
|
|
|
/**
|
|
* dev_pm_opp_put_clkname() - Releases resources blocked for clk.
|
|
* @opp_table: OPP table returned from dev_pm_opp_set_clkname().
|
|
*/
|
|
void dev_pm_opp_put_clkname(struct opp_table *opp_table)
|
|
{
|
|
/* Make sure there are no concurrent readers while updating opp_table */
|
|
WARN_ON(!list_empty(&opp_table->opp_list));
|
|
|
|
clk_put(opp_table->clk);
|
|
opp_table->clk = ERR_PTR(-EINVAL);
|
|
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_put_clkname);
|
|
|
|
/**
|
|
* dev_pm_opp_register_set_opp_helper() - Register custom set OPP helper
|
|
* @dev: Device for which the helper is getting registered.
|
|
* @set_opp: Custom set OPP helper.
|
|
*
|
|
* This is useful to support complex platforms (like platforms with multiple
|
|
* regulators per device), instead of the generic OPP set rate helper.
|
|
*
|
|
* This must be called before any OPPs are initialized for the device.
|
|
*/
|
|
struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
|
|
int (*set_opp)(struct dev_pm_set_opp_data *data))
|
|
{
|
|
struct opp_table *opp_table;
|
|
|
|
if (!set_opp)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
opp_table = dev_pm_opp_get_opp_table(dev);
|
|
if (!opp_table)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/* This should be called before OPPs are initialized */
|
|
if (WARN_ON(!list_empty(&opp_table->opp_list))) {
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
return ERR_PTR(-EBUSY);
|
|
}
|
|
|
|
/* Another CPU that shares the OPP table has set the helper ? */
|
|
if (!opp_table->set_opp)
|
|
opp_table->set_opp = set_opp;
|
|
|
|
return opp_table;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_register_set_opp_helper);
|
|
|
|
/**
|
|
* dev_pm_opp_unregister_set_opp_helper() - Releases resources blocked for
|
|
* set_opp helper
|
|
* @opp_table: OPP table returned from dev_pm_opp_register_set_opp_helper().
|
|
*
|
|
* Release resources blocked for platform specific set_opp helper.
|
|
*/
|
|
void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table)
|
|
{
|
|
/* Make sure there are no concurrent readers while updating opp_table */
|
|
WARN_ON(!list_empty(&opp_table->opp_list));
|
|
|
|
opp_table->set_opp = NULL;
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_unregister_set_opp_helper);
|
|
|
|
static void _opp_detach_genpd(struct opp_table *opp_table)
|
|
{
|
|
int index;
|
|
|
|
if (!opp_table->genpd_virt_devs)
|
|
return;
|
|
|
|
for (index = 0; index < opp_table->required_opp_count; index++) {
|
|
if (!opp_table->genpd_virt_devs[index])
|
|
continue;
|
|
|
|
dev_pm_domain_detach(opp_table->genpd_virt_devs[index], false);
|
|
opp_table->genpd_virt_devs[index] = NULL;
|
|
}
|
|
|
|
kfree(opp_table->genpd_virt_devs);
|
|
opp_table->genpd_virt_devs = NULL;
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_attach_genpd - Attach genpd(s) for the device and save virtual device pointer
|
|
* @dev: Consumer device for which the genpd is getting attached.
|
|
* @names: Null terminated array of pointers containing names of genpd to attach.
|
|
* @virt_devs: Pointer to return the array of virtual devices.
|
|
*
|
|
* Multiple generic power domains for a device are supported with the help of
|
|
* virtual genpd devices, which are created for each consumer device - genpd
|
|
* pair. These are the device structures which are attached to the power domain
|
|
* and are required by the OPP core to set the performance state of the genpd.
|
|
* The same API also works for the case where single genpd is available and so
|
|
* we don't need to support that separately.
|
|
*
|
|
* This helper will normally be called by the consumer driver of the device
|
|
* "dev", as only that has details of the genpd names.
|
|
*
|
|
* This helper needs to be called once with a list of all genpd to attach.
|
|
* Otherwise the original device structure will be used instead by the OPP core.
|
|
*
|
|
* The order of entries in the names array must match the order in which
|
|
* "required-opps" are added in DT.
|
|
*/
|
|
struct opp_table *dev_pm_opp_attach_genpd(struct device *dev,
|
|
const char **names, struct device ***virt_devs)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct device *virt_dev;
|
|
int index = 0, ret = -EINVAL;
|
|
const char **name = names;
|
|
|
|
opp_table = dev_pm_opp_get_opp_table(dev);
|
|
if (!opp_table)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
if (opp_table->genpd_virt_devs)
|
|
return opp_table;
|
|
|
|
/*
|
|
* If the genpd's OPP table isn't already initialized, parsing of the
|
|
* required-opps fail for dev. We should retry this after genpd's OPP
|
|
* table is added.
|
|
*/
|
|
if (!opp_table->required_opp_count) {
|
|
ret = -EPROBE_DEFER;
|
|
goto put_table;
|
|
}
|
|
|
|
mutex_lock(&opp_table->genpd_virt_dev_lock);
|
|
|
|
opp_table->genpd_virt_devs = kcalloc(opp_table->required_opp_count,
|
|
sizeof(*opp_table->genpd_virt_devs),
|
|
GFP_KERNEL);
|
|
if (!opp_table->genpd_virt_devs)
|
|
goto unlock;
|
|
|
|
while (*name) {
|
|
if (index >= opp_table->required_opp_count) {
|
|
dev_err(dev, "Index can't be greater than required-opp-count - 1, %s (%d : %d)\n",
|
|
*name, opp_table->required_opp_count, index);
|
|
goto err;
|
|
}
|
|
|
|
if (opp_table->genpd_virt_devs[index]) {
|
|
dev_err(dev, "Genpd virtual device already set %s\n",
|
|
*name);
|
|
goto err;
|
|
}
|
|
|
|
virt_dev = dev_pm_domain_attach_by_name(dev, *name);
|
|
if (IS_ERR_OR_NULL(virt_dev)) {
|
|
ret = virt_dev ? PTR_ERR(virt_dev) : -ENODEV;
|
|
dev_err(dev, "Couldn't attach to pm_domain: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
opp_table->genpd_virt_devs[index] = virt_dev;
|
|
index++;
|
|
name++;
|
|
}
|
|
|
|
if (virt_devs)
|
|
*virt_devs = opp_table->genpd_virt_devs;
|
|
mutex_unlock(&opp_table->genpd_virt_dev_lock);
|
|
|
|
return opp_table;
|
|
|
|
err:
|
|
_opp_detach_genpd(opp_table);
|
|
unlock:
|
|
mutex_unlock(&opp_table->genpd_virt_dev_lock);
|
|
|
|
put_table:
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_attach_genpd);
|
|
|
|
/**
|
|
* dev_pm_opp_detach_genpd() - Detach genpd(s) from the device.
|
|
* @opp_table: OPP table returned by dev_pm_opp_attach_genpd().
|
|
*
|
|
* This detaches the genpd(s), resets the virtual device pointers, and puts the
|
|
* OPP table.
|
|
*/
|
|
void dev_pm_opp_detach_genpd(struct opp_table *opp_table)
|
|
{
|
|
/*
|
|
* Acquire genpd_virt_dev_lock to make sure virt_dev isn't getting
|
|
* used in parallel.
|
|
*/
|
|
mutex_lock(&opp_table->genpd_virt_dev_lock);
|
|
_opp_detach_genpd(opp_table);
|
|
mutex_unlock(&opp_table->genpd_virt_dev_lock);
|
|
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_detach_genpd);
|
|
|
|
/**
|
|
* dev_pm_opp_xlate_performance_state() - Find required OPP's pstate for src_table.
|
|
* @src_table: OPP table which has dst_table as one of its required OPP table.
|
|
* @dst_table: Required OPP table of the src_table.
|
|
* @pstate: Current performance state of the src_table.
|
|
*
|
|
* This Returns pstate of the OPP (present in @dst_table) pointed out by the
|
|
* "required-opps" property of the OPP (present in @src_table) which has
|
|
* performance state set to @pstate.
|
|
*
|
|
* Return: Zero or positive performance state on success, otherwise negative
|
|
* value on errors.
|
|
*/
|
|
int dev_pm_opp_xlate_performance_state(struct opp_table *src_table,
|
|
struct opp_table *dst_table,
|
|
unsigned int pstate)
|
|
{
|
|
struct dev_pm_opp *opp;
|
|
int dest_pstate = -EINVAL;
|
|
int i;
|
|
|
|
if (!pstate)
|
|
return 0;
|
|
|
|
/*
|
|
* Normally the src_table will have the "required_opps" property set to
|
|
* point to one of the OPPs in the dst_table, but in some cases the
|
|
* genpd and its master have one to one mapping of performance states
|
|
* and so none of them have the "required-opps" property set. Return the
|
|
* pstate of the src_table as it is in such cases.
|
|
*/
|
|
if (!src_table->required_opp_count)
|
|
return pstate;
|
|
|
|
for (i = 0; i < src_table->required_opp_count; i++) {
|
|
if (src_table->required_opp_tables[i]->np == dst_table->np)
|
|
break;
|
|
}
|
|
|
|
if (unlikely(i == src_table->required_opp_count)) {
|
|
pr_err("%s: Couldn't find matching OPP table (%p: %p)\n",
|
|
__func__, src_table, dst_table);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&src_table->lock);
|
|
|
|
list_for_each_entry(opp, &src_table->opp_list, node) {
|
|
if (opp->pstate == pstate) {
|
|
dest_pstate = opp->required_opps[i]->pstate;
|
|
goto unlock;
|
|
}
|
|
}
|
|
|
|
pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, src_table,
|
|
dst_table);
|
|
|
|
unlock:
|
|
mutex_unlock(&src_table->lock);
|
|
|
|
return dest_pstate;
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_add() - Add an OPP table from a table definitions
|
|
* @dev: device for which we do this operation
|
|
* @freq: Frequency in Hz for this OPP
|
|
* @u_volt: Voltage in uVolts for this OPP
|
|
*
|
|
* This function adds an opp definition to the opp table and returns status.
|
|
* The opp is made available by default and it can be controlled using
|
|
* dev_pm_opp_enable/disable functions.
|
|
*
|
|
* Return:
|
|
* 0 On success OR
|
|
* Duplicate OPPs (both freq and volt are same) and opp->available
|
|
* -EEXIST Freq are same and volt are different OR
|
|
* Duplicate OPPs (both freq and volt are same) and !opp->available
|
|
* -ENOMEM Memory allocation failure
|
|
*/
|
|
int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
|
|
{
|
|
struct opp_table *opp_table;
|
|
int ret;
|
|
|
|
opp_table = dev_pm_opp_get_opp_table(dev);
|
|
if (!opp_table)
|
|
return -ENOMEM;
|
|
|
|
/* Fix regulator count for dynamic OPPs */
|
|
opp_table->regulator_count = 1;
|
|
|
|
ret = _opp_add_v1(opp_table, dev, freq, u_volt, true);
|
|
if (ret)
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_add);
|
|
|
|
/**
|
|
* _opp_set_availability() - helper to set the availability of an opp
|
|
* @dev: device for which we do this operation
|
|
* @freq: OPP frequency to modify availability
|
|
* @availability_req: availability status requested for this opp
|
|
*
|
|
* Set the availability of an OPP, opp_{enable,disable} share a common logic
|
|
* which is isolated here.
|
|
*
|
|
* Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
|
|
* copy operation, returns 0 if no modification was done OR modification was
|
|
* successful.
|
|
*/
|
|
static int _opp_set_availability(struct device *dev, unsigned long freq,
|
|
bool availability_req)
|
|
{
|
|
struct opp_table *opp_table;
|
|
struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV);
|
|
int r = 0;
|
|
|
|
/* Find the opp_table */
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table)) {
|
|
r = PTR_ERR(opp_table);
|
|
dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
|
|
return r;
|
|
}
|
|
|
|
mutex_lock(&opp_table->lock);
|
|
|
|
/* Do we have the frequency? */
|
|
list_for_each_entry(tmp_opp, &opp_table->opp_list, node) {
|
|
if (tmp_opp->rate == freq) {
|
|
opp = tmp_opp;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (IS_ERR(opp)) {
|
|
r = PTR_ERR(opp);
|
|
goto unlock;
|
|
}
|
|
|
|
/* Is update really needed? */
|
|
if (opp->available == availability_req)
|
|
goto unlock;
|
|
|
|
opp->available = availability_req;
|
|
|
|
dev_pm_opp_get(opp);
|
|
mutex_unlock(&opp_table->lock);
|
|
|
|
/* Notify the change of the OPP availability */
|
|
if (availability_req)
|
|
blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE,
|
|
opp);
|
|
else
|
|
blocking_notifier_call_chain(&opp_table->head,
|
|
OPP_EVENT_DISABLE, opp);
|
|
|
|
dev_pm_opp_put(opp);
|
|
goto put_table;
|
|
|
|
unlock:
|
|
mutex_unlock(&opp_table->lock);
|
|
put_table:
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_enable() - Enable a specific OPP
|
|
* @dev: device for which we do this operation
|
|
* @freq: OPP frequency to enable
|
|
*
|
|
* Enables a provided opp. If the operation is valid, this returns 0, else the
|
|
* corresponding error value. It is meant to be used for users an OPP available
|
|
* after being temporarily made unavailable with dev_pm_opp_disable.
|
|
*
|
|
* Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
|
|
* copy operation, returns 0 if no modification was done OR modification was
|
|
* successful.
|
|
*/
|
|
int dev_pm_opp_enable(struct device *dev, unsigned long freq)
|
|
{
|
|
return _opp_set_availability(dev, freq, true);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_enable);
|
|
|
|
/**
|
|
* dev_pm_opp_disable() - Disable a specific OPP
|
|
* @dev: device for which we do this operation
|
|
* @freq: OPP frequency to disable
|
|
*
|
|
* Disables a provided opp. If the operation is valid, this returns
|
|
* 0, else the corresponding error value. It is meant to be a temporary
|
|
* control by users to make this OPP not available until the circumstances are
|
|
* right to make it available again (with a call to dev_pm_opp_enable).
|
|
*
|
|
* Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
|
|
* copy operation, returns 0 if no modification was done OR modification was
|
|
* successful.
|
|
*/
|
|
int dev_pm_opp_disable(struct device *dev, unsigned long freq)
|
|
{
|
|
return _opp_set_availability(dev, freq, false);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_disable);
|
|
|
|
/**
|
|
* dev_pm_opp_register_notifier() - Register OPP notifier for the device
|
|
* @dev: Device for which notifier needs to be registered
|
|
* @nb: Notifier block to be registered
|
|
*
|
|
* Return: 0 on success or a negative error value.
|
|
*/
|
|
int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb)
|
|
{
|
|
struct opp_table *opp_table;
|
|
int ret;
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return PTR_ERR(opp_table);
|
|
|
|
ret = blocking_notifier_chain_register(&opp_table->head, nb);
|
|
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(dev_pm_opp_register_notifier);
|
|
|
|
/**
|
|
* dev_pm_opp_unregister_notifier() - Unregister OPP notifier for the device
|
|
* @dev: Device for which notifier needs to be unregistered
|
|
* @nb: Notifier block to be unregistered
|
|
*
|
|
* Return: 0 on success or a negative error value.
|
|
*/
|
|
int dev_pm_opp_unregister_notifier(struct device *dev,
|
|
struct notifier_block *nb)
|
|
{
|
|
struct opp_table *opp_table;
|
|
int ret;
|
|
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table))
|
|
return PTR_ERR(opp_table);
|
|
|
|
ret = blocking_notifier_chain_unregister(&opp_table->head, nb);
|
|
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(dev_pm_opp_unregister_notifier);
|
|
|
|
void _dev_pm_opp_find_and_remove_table(struct device *dev)
|
|
{
|
|
struct opp_table *opp_table;
|
|
|
|
/* Check for existing table for 'dev' */
|
|
opp_table = _find_opp_table(dev);
|
|
if (IS_ERR(opp_table)) {
|
|
int error = PTR_ERR(opp_table);
|
|
|
|
if (error != -ENODEV)
|
|
WARN(1, "%s: opp_table: %d\n",
|
|
IS_ERR_OR_NULL(dev) ?
|
|
"Invalid device" : dev_name(dev),
|
|
error);
|
|
return;
|
|
}
|
|
|
|
_put_opp_list_kref(opp_table);
|
|
|
|
/* Drop reference taken by _find_opp_table() */
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
|
|
/* Drop reference taken while the OPP table was added */
|
|
dev_pm_opp_put_opp_table(opp_table);
|
|
}
|
|
|
|
/**
|
|
* dev_pm_opp_remove_table() - Free all OPPs associated with the device
|
|
* @dev: device pointer used to lookup OPP table.
|
|
*
|
|
* Free both OPPs created using static entries present in DT and the
|
|
* dynamically added entries.
|
|
*/
|
|
void dev_pm_opp_remove_table(struct device *dev)
|
|
{
|
|
_dev_pm_opp_find_and_remove_table(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table);
|