reset: uniphier: add reset controller driver for UniPhier SoCs
This is the initial commit for UniPhier reset controller driver. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Masahiro Yamada
Philipp Zabel
parent
9af8071298
commit
54e991b566
93
Documentation/devicetree/bindings/reset/uniphier-reset.txt
Normal file
93
Documentation/devicetree/bindings/reset/uniphier-reset.txt
Normal file
@ -0,0 +1,93 @@
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UniPhier reset controller
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System reset
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------------
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Required properties:
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- compatible: should be one of the following:
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"socionext,uniphier-sld3-reset" - for PH1-sLD3 SoC.
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"socionext,uniphier-ld4-reset" - for PH1-LD4 SoC.
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"socionext,uniphier-pro4-reset" - for PH1-Pro4 SoC.
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"socionext,uniphier-sld8-reset" - for PH1-sLD8 SoC.
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"socionext,uniphier-pro5-reset" - for PH1-Pro5 SoC.
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"socionext,uniphier-pxs2-reset" - for ProXstream2/PH1-LD6b SoC.
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"socionext,uniphier-ld11-reset" - for PH1-LD11 SoC.
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"socionext,uniphier-ld20-reset" - for PH1-LD20 SoC.
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- #reset-cells: should be 1.
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Example:
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sysctrl@61840000 {
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compatible = "socionext,uniphier-ld20-sysctrl",
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"simple-mfd", "syscon";
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reg = <0x61840000 0x4000>;
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reset {
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compatible = "socionext,uniphier-ld20-reset";
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#reset-cells = <1>;
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};
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other nodes ...
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};
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Media I/O (MIO) reset
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---------------------
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Required properties:
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- compatible: should be one of the following:
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"socionext,uniphier-sld3-mio-reset" - for PH1-sLD3 SoC.
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"socionext,uniphier-ld4-mio-reset" - for PH1-LD4 SoC.
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"socionext,uniphier-pro4-mio-reset" - for PH1-Pro4 SoC.
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"socionext,uniphier-sld8-mio-reset" - for PH1-sLD8 SoC.
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"socionext,uniphier-pro5-mio-reset" - for PH1-Pro5 SoC.
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"socionext,uniphier-pxs2-mio-reset" - for ProXstream2/PH1-LD6b SoC.
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"socionext,uniphier-ld11-mio-reset" - for PH1-LD11 SoC.
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"socionext,uniphier-ld20-mio-reset" - for PH1-LD20 SoC.
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- #reset-cells: should be 1.
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Example:
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mioctrl@59810000 {
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compatible = "socionext,uniphier-ld20-mioctrl",
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"simple-mfd", "syscon";
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reg = <0x59810000 0x800>;
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reset {
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compatible = "socionext,uniphier-ld20-mio-reset";
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#reset-cells = <1>;
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};
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other nodes ...
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};
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Peripheral reset
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----------------
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Required properties:
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- compatible: should be one of the following:
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"socionext,uniphier-ld4-peri-reset" - for PH1-LD4 SoC.
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"socionext,uniphier-pro4-peri-reset" - for PH1-Pro4 SoC.
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"socionext,uniphier-sld8-peri-reset" - for PH1-sLD8 SoC.
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"socionext,uniphier-pro5-peri-reset" - for PH1-Pro5 SoC.
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"socionext,uniphier-pxs2-peri-reset" - for ProXstream2/PH1-LD6b SoC.
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"socionext,uniphier-ld11-peri-reset" - for PH1-LD11 SoC.
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"socionext,uniphier-ld20-peri-reset" - for PH1-LD20 SoC.
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- #reset-cells: should be 1.
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Example:
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perictrl@59820000 {
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compatible = "socionext,uniphier-ld20-perictrl",
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"simple-mfd", "syscon";
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reg = <0x59820000 0x200>;
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reset {
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compatible = "socionext,uniphier-ld20-peri-reset";
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#reset-cells = <1>;
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};
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other nodes ...
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};
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@ -1830,6 +1830,7 @@ F: arch/arm64/boot/dts/socionext/
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F: drivers/bus/uniphier-system-bus.c
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F: drivers/i2c/busses/i2c-uniphier*
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F: drivers/pinctrl/uniphier/
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F: drivers/reset/reset-uniphier.c
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F: drivers/tty/serial/8250/8250_uniphier.c
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N: uniphier
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@ -27,6 +27,16 @@ config TI_SYSCON_RESET
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you wish to use the reset framework for such memory-mapped devices,
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say Y here. Otherwise, say N.
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config RESET_UNIPHIER
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tristate "Reset controller driver for UniPhier SoCs"
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depends on ARCH_UNIPHIER || COMPILE_TEST
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depends on OF && MFD_SYSCON
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default ARCH_UNIPHIER
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help
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Support for reset controllers on UniPhier SoCs.
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Say Y if you want to control reset signals provided by System Control
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block, Media I/O block, Peripheral Block.
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source "drivers/reset/sti/Kconfig"
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source "drivers/reset/hisilicon/Kconfig"
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@ -12,3 +12,4 @@ obj-$(CONFIG_ARCH_ZYNQ) += reset-zynq.o
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obj-$(CONFIG_ATH79) += reset-ath79.o
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obj-$(CONFIG_RESET_OXNAS) += reset-oxnas.o
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obj-$(CONFIG_TI_SYSCON_RESET) += reset-ti-syscon.o
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obj-$(CONFIG_RESET_UNIPHIER) += reset-uniphier.o
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440
drivers/reset/reset-uniphier.c
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440
drivers/reset/reset-uniphier.c
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@ -0,0 +1,440 @@
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/*
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* Copyright (C) 2016 Socionext Inc.
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* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/reset-controller.h>
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struct uniphier_reset_data {
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unsigned int id;
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unsigned int reg;
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unsigned int bit;
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unsigned int flags;
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#define UNIPHIER_RESET_ACTIVE_LOW BIT(0)
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};
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#define UNIPHIER_RESET_ID_END (unsigned int)(-1)
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#define UNIPHIER_RESET_END \
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{ .id = UNIPHIER_RESET_ID_END }
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#define UNIPHIER_RESET(_id, _reg, _bit) \
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{ \
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.id = (_id), \
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.reg = (_reg), \
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.bit = (_bit), \
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}
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#define UNIPHIER_RESETX(_id, _reg, _bit) \
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{ \
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.id = (_id), \
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.reg = (_reg), \
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.bit = (_bit), \
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.flags = UNIPHIER_RESET_ACTIVE_LOW, \
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}
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/* System reset data */
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#define UNIPHIER_SLD3_SYS_RESET_STDMAC(id) \
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UNIPHIER_RESETX((id), 0x2000, 10)
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#define UNIPHIER_LD11_SYS_RESET_STDMAC(id) \
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UNIPHIER_RESETX((id), 0x200c, 8)
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#define UNIPHIER_PRO4_SYS_RESET_GIO(id) \
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UNIPHIER_RESETX((id), 0x2000, 6)
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#define UNIPHIER_LD20_SYS_RESET_GIO(id) \
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UNIPHIER_RESETX((id), 0x200c, 5)
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#define UNIPHIER_PRO4_SYS_RESET_USB3(id, ch) \
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UNIPHIER_RESETX((id), 0x2000 + 0x4 * (ch), 17)
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const struct uniphier_reset_data uniphier_sld3_sys_reset_data[] = {
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UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* Ether, HSC, MIO */
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UNIPHIER_RESET_END,
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};
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const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = {
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UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC, MIO, RLE */
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UNIPHIER_PRO4_SYS_RESET_GIO(12), /* Ether, SATA, USB3 */
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UNIPHIER_PRO4_SYS_RESET_USB3(14, 0),
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UNIPHIER_PRO4_SYS_RESET_USB3(15, 1),
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UNIPHIER_RESET_END,
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};
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const struct uniphier_reset_data uniphier_pro5_sys_reset_data[] = {
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UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC */
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UNIPHIER_PRO4_SYS_RESET_GIO(12), /* PCIe, USB3 */
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UNIPHIER_PRO4_SYS_RESET_USB3(14, 0),
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UNIPHIER_PRO4_SYS_RESET_USB3(15, 1),
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UNIPHIER_RESET_END,
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};
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const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = {
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UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC, RLE */
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UNIPHIER_PRO4_SYS_RESET_USB3(14, 0),
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UNIPHIER_PRO4_SYS_RESET_USB3(15, 1),
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UNIPHIER_RESETX(16, 0x2014, 4), /* USB30-PHY0 */
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UNIPHIER_RESETX(17, 0x2014, 0), /* USB30-PHY1 */
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UNIPHIER_RESETX(18, 0x2014, 2), /* USB30-PHY2 */
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UNIPHIER_RESETX(20, 0x2014, 5), /* USB31-PHY0 */
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UNIPHIER_RESETX(21, 0x2014, 1), /* USB31-PHY1 */
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UNIPHIER_RESETX(28, 0x2014, 12), /* SATA */
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UNIPHIER_RESET(29, 0x2014, 8), /* SATA-PHY (active high) */
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UNIPHIER_RESET_END,
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};
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const struct uniphier_reset_data uniphier_ld11_sys_reset_data[] = {
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UNIPHIER_LD11_SYS_RESET_STDMAC(8), /* HSC, MIO */
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UNIPHIER_RESET_END,
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};
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const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = {
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UNIPHIER_LD11_SYS_RESET_STDMAC(8), /* HSC */
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UNIPHIER_LD20_SYS_RESET_GIO(12), /* PCIe, USB3 */
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UNIPHIER_RESETX(16, 0x200c, 12), /* USB30-PHY0 */
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UNIPHIER_RESETX(17, 0x200c, 13), /* USB30-PHY1 */
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UNIPHIER_RESETX(18, 0x200c, 14), /* USB30-PHY2 */
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UNIPHIER_RESETX(19, 0x200c, 15), /* USB30-PHY3 */
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UNIPHIER_RESET_END,
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};
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/* Media I/O reset data */
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#define UNIPHIER_MIO_RESET_SD(id, ch) \
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UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 0)
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#define UNIPHIER_MIO_RESET_SD_BRIDGE(id, ch) \
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UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 26)
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#define UNIPHIER_MIO_RESET_EMMC_HW_RESET(id, ch) \
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UNIPHIER_RESETX((id), 0x80 + 0x200 * (ch), 0)
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#define UNIPHIER_MIO_RESET_USB2(id, ch) \
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UNIPHIER_RESETX((id), 0x114 + 0x200 * (ch), 0)
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#define UNIPHIER_MIO_RESET_USB2_BRIDGE(id, ch) \
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UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 24)
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#define UNIPHIER_MIO_RESET_DMAC(id) \
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UNIPHIER_RESETX((id), 0x110, 17)
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const struct uniphier_reset_data uniphier_sld3_mio_reset_data[] = {
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UNIPHIER_MIO_RESET_SD(0, 0),
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UNIPHIER_MIO_RESET_SD(1, 1),
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UNIPHIER_MIO_RESET_SD(2, 2),
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UNIPHIER_MIO_RESET_SD_BRIDGE(3, 0),
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UNIPHIER_MIO_RESET_SD_BRIDGE(4, 1),
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UNIPHIER_MIO_RESET_SD_BRIDGE(5, 2),
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UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1),
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UNIPHIER_MIO_RESET_DMAC(7),
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UNIPHIER_MIO_RESET_USB2(8, 0),
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UNIPHIER_MIO_RESET_USB2(9, 1),
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UNIPHIER_MIO_RESET_USB2(10, 2),
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UNIPHIER_MIO_RESET_USB2(11, 3),
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UNIPHIER_MIO_RESET_USB2_BRIDGE(12, 0),
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UNIPHIER_MIO_RESET_USB2_BRIDGE(13, 1),
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UNIPHIER_MIO_RESET_USB2_BRIDGE(14, 2),
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UNIPHIER_MIO_RESET_USB2_BRIDGE(15, 3),
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UNIPHIER_RESET_END,
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};
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const struct uniphier_reset_data uniphier_pro5_mio_reset_data[] = {
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UNIPHIER_MIO_RESET_SD(0, 0),
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UNIPHIER_MIO_RESET_SD(1, 1),
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UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1),
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UNIPHIER_RESET_END,
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};
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/* Peripheral reset data */
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#define UNIPHIER_PERI_RESET_UART(id, ch) \
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UNIPHIER_RESETX((id), 0x114, 19 + (ch))
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#define UNIPHIER_PERI_RESET_I2C(id, ch) \
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UNIPHIER_RESETX((id), 0x114, 5 + (ch))
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#define UNIPHIER_PERI_RESET_FI2C(id, ch) \
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UNIPHIER_RESETX((id), 0x114, 24 + (ch))
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const struct uniphier_reset_data uniphier_ld4_peri_reset_data[] = {
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UNIPHIER_PERI_RESET_UART(0, 0),
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UNIPHIER_PERI_RESET_UART(1, 1),
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UNIPHIER_PERI_RESET_UART(2, 2),
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UNIPHIER_PERI_RESET_UART(3, 3),
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UNIPHIER_PERI_RESET_I2C(4, 0),
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UNIPHIER_PERI_RESET_I2C(5, 1),
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UNIPHIER_PERI_RESET_I2C(6, 2),
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UNIPHIER_PERI_RESET_I2C(7, 3),
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UNIPHIER_PERI_RESET_I2C(8, 4),
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UNIPHIER_RESET_END,
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};
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const struct uniphier_reset_data uniphier_pro4_peri_reset_data[] = {
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UNIPHIER_PERI_RESET_UART(0, 0),
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UNIPHIER_PERI_RESET_UART(1, 1),
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UNIPHIER_PERI_RESET_UART(2, 2),
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UNIPHIER_PERI_RESET_UART(3, 3),
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UNIPHIER_PERI_RESET_FI2C(4, 0),
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UNIPHIER_PERI_RESET_FI2C(5, 1),
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UNIPHIER_PERI_RESET_FI2C(6, 2),
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UNIPHIER_PERI_RESET_FI2C(7, 3),
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UNIPHIER_PERI_RESET_FI2C(8, 4),
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UNIPHIER_PERI_RESET_FI2C(9, 5),
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UNIPHIER_PERI_RESET_FI2C(10, 6),
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UNIPHIER_RESET_END,
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};
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/* core implementaton */
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struct uniphier_reset_priv {
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struct reset_controller_dev rcdev;
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struct device *dev;
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struct regmap *regmap;
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const struct uniphier_reset_data *data;
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};
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#define to_uniphier_reset_priv(_rcdev) \
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container_of(_rcdev, struct uniphier_reset_priv, rcdev)
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static int uniphier_reset_update(struct reset_controller_dev *rcdev,
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unsigned long id, int assert)
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{
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struct uniphier_reset_priv *priv = to_uniphier_reset_priv(rcdev);
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const struct uniphier_reset_data *p;
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for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) {
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unsigned int mask, val;
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if (p->id != id)
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continue;
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mask = BIT(p->bit);
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if (assert)
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val = mask;
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else
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val = ~mask;
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if (p->flags & UNIPHIER_RESET_ACTIVE_LOW)
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val = ~val;
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return regmap_write_bits(priv->regmap, p->reg, mask, val);
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}
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dev_err(priv->dev, "reset_id=%lu was not handled\n", id);
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return -EINVAL;
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}
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static int uniphier_reset_assert(struct reset_controller_dev *rcdev,
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unsigned long id)
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{
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return uniphier_reset_update(rcdev, id, 1);
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}
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static int uniphier_reset_deassert(struct reset_controller_dev *rcdev,
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unsigned long id)
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{
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return uniphier_reset_update(rcdev, id, 0);
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}
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static int uniphier_reset_status(struct reset_controller_dev *rcdev,
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unsigned long id)
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{
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struct uniphier_reset_priv *priv = to_uniphier_reset_priv(rcdev);
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const struct uniphier_reset_data *p;
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for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) {
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unsigned int val;
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int ret, asserted;
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if (p->id != id)
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continue;
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ret = regmap_read(priv->regmap, p->reg, &val);
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if (ret)
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return ret;
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asserted = !!(val & BIT(p->bit));
|
||||
|
||||
if (p->flags & UNIPHIER_RESET_ACTIVE_LOW)
|
||||
asserted = !asserted;
|
||||
|
||||
return asserted;
|
||||
}
|
||||
|
||||
dev_err(priv->dev, "reset_id=%lu was not found\n", id);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static const struct reset_control_ops uniphier_reset_ops = {
|
||||
.assert = uniphier_reset_assert,
|
||||
.deassert = uniphier_reset_deassert,
|
||||
.status = uniphier_reset_status,
|
||||
};
|
||||
|
||||
static int uniphier_reset_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct uniphier_reset_priv *priv;
|
||||
const struct uniphier_reset_data *p, *data;
|
||||
struct regmap *regmap;
|
||||
struct device_node *parent;
|
||||
unsigned int nr_resets = 0;
|
||||
|
||||
data = of_device_get_match_data(dev);
|
||||
if (WARN_ON(!data))
|
||||
return -EINVAL;
|
||||
|
||||
parent = of_get_parent(dev->of_node); /* parent should be syscon node */
|
||||
regmap = syscon_node_to_regmap(parent);
|
||||
of_node_put(parent);
|
||||
if (IS_ERR(regmap)) {
|
||||
dev_err(dev, "failed to get regmap (error %ld)\n",
|
||||
PTR_ERR(regmap));
|
||||
return PTR_ERR(regmap);
|
||||
}
|
||||
|
||||
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return -ENOMEM;
|
||||
|
||||
for (p = data; p->id != UNIPHIER_RESET_ID_END; p++)
|
||||
nr_resets = max(nr_resets, p->id + 1);
|
||||
|
||||
priv->rcdev.ops = &uniphier_reset_ops;
|
||||
priv->rcdev.owner = dev->driver->owner;
|
||||
priv->rcdev.of_node = dev->of_node;
|
||||
priv->rcdev.nr_resets = nr_resets;
|
||||
priv->dev = dev;
|
||||
priv->regmap = regmap;
|
||||
priv->data = data;
|
||||
|
||||
return devm_reset_controller_register(&pdev->dev, &priv->rcdev);
|
||||
}
|
||||
|
||||
static const struct of_device_id uniphier_reset_match[] = {
|
||||
/* System reset */
|
||||
{
|
||||
.compatible = "socionext,uniphier-sld3-reset",
|
||||
.data = uniphier_sld3_sys_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-ld4-reset",
|
||||
.data = uniphier_sld3_sys_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-pro4-reset",
|
||||
.data = uniphier_pro4_sys_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-sld8-reset",
|
||||
.data = uniphier_sld3_sys_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-pro5-reset",
|
||||
.data = uniphier_pro5_sys_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-pxs2-reset",
|
||||
.data = uniphier_pxs2_sys_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-ld11-reset",
|
||||
.data = uniphier_ld11_sys_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-ld20-reset",
|
||||
.data = uniphier_ld20_sys_reset_data,
|
||||
},
|
||||
/* Media I/O reset */
|
||||
{
|
||||
.compatible = "socionext,uniphier-sld3-mio-reset",
|
||||
.data = uniphier_sld3_mio_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-ld4-mio-reset",
|
||||
.data = uniphier_sld3_mio_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-pro4-mio-reset",
|
||||
.data = uniphier_sld3_mio_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-sld8-mio-reset",
|
||||
.data = uniphier_sld3_mio_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-pro5-mio-reset",
|
||||
.data = uniphier_pro5_mio_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-pxs2-mio-reset",
|
||||
.data = uniphier_pro5_mio_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-ld11-mio-reset",
|
||||
.data = uniphier_sld3_mio_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-ld20-mio-reset",
|
||||
.data = uniphier_pro5_mio_reset_data,
|
||||
},
|
||||
/* Peripheral reset */
|
||||
{
|
||||
.compatible = "socionext,uniphier-ld4-peri-reset",
|
||||
.data = uniphier_ld4_peri_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-pro4-peri-reset",
|
||||
.data = uniphier_pro4_peri_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-sld8-peri-reset",
|
||||
.data = uniphier_ld4_peri_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-pro5-peri-reset",
|
||||
.data = uniphier_pro4_peri_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-pxs2-peri-reset",
|
||||
.data = uniphier_pro4_peri_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-ld11-peri-reset",
|
||||
.data = uniphier_pro4_peri_reset_data,
|
||||
},
|
||||
{
|
||||
.compatible = "socionext,uniphier-ld20-peri-reset",
|
||||
.data = uniphier_pro4_peri_reset_data,
|
||||
},
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, uniphier_reset_match);
|
||||
|
||||
static struct platform_driver uniphier_reset_driver = {
|
||||
.probe = uniphier_reset_probe,
|
||||
.driver = {
|
||||
.name = "uniphier-reset",
|
||||
.of_match_table = uniphier_reset_match,
|
||||
},
|
||||
};
|
||||
module_platform_driver(uniphier_reset_driver);
|
||||
|
||||
MODULE_AUTHOR("Masahiro Yamada <yamada.masahiro@socionext.com>");
|
||||
MODULE_DESCRIPTION("UniPhier Reset Controller Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user