14d6358976
Change dmesg print for ddr cap frequency driver. Change-Id: I2d660f51596dc6c309ad932b543c7c030b1b04cb Signed-off-by: Vinay Sudra <vsudra@codeaurora.org>
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* Copyright (c) 2021, The Linux Foundation. All rights reserved. */
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mailbox_client.h>
|
|
#include <linux/mailbox/qmp.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#define MAX_MSG_SIZE 96 /* Imposed by the remote */
|
|
|
|
struct set_ddr_freq_data {
|
|
struct qmp_pkt pkt;
|
|
char buf[MAX_MSG_SIZE + 1];
|
|
};
|
|
|
|
static struct set_ddr_freq_data data_pkt;
|
|
static struct mbox_chan *chan;
|
|
static struct mbox_client *cl;
|
|
|
|
static ssize_t set_ddr_capped_freq_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t len)
|
|
{
|
|
unsigned int freq = 0;
|
|
|
|
if (kstrtou32(buf, 0, &freq)) {
|
|
pr_err("%s: failed to read frequency info from string\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
memset(&data_pkt, 0, sizeof(data_pkt));
|
|
snprintf(data_pkt.buf, MAX_MSG_SIZE,
|
|
"{class:ddr, res:capped, val: %d}", freq);
|
|
pr_debug("%s : data: %s\n", __func__, data_pkt.buf);
|
|
|
|
/* Controller expects a 4 byte aligned buffer */
|
|
data_pkt.pkt.size = (strlen(data_pkt.buf) + 0x3) & ~0x3;
|
|
data_pkt.pkt.data = data_pkt.buf;
|
|
|
|
if (mbox_send_message(chan, &(data_pkt.pkt)) < 0)
|
|
pr_err("Failed to send qmp request\n");
|
|
|
|
return len;
|
|
}
|
|
static DEVICE_ATTR_WO(set_ddr_capped_freq);
|
|
|
|
static int set_ddr_freq_probe(struct platform_device *pdev)
|
|
{
|
|
int ret = 0;
|
|
|
|
cl = devm_kzalloc(&pdev->dev, sizeof(*cl), GFP_KERNEL);
|
|
if (!cl)
|
|
return -ENOMEM;
|
|
|
|
cl->dev = &pdev->dev;
|
|
cl->tx_block = true;
|
|
cl->tx_tout = 1000;
|
|
cl->knows_txdone = false;
|
|
|
|
chan = mbox_request_channel(cl, 0);
|
|
if (IS_ERR(chan)) {
|
|
dev_err(&pdev->dev, "Failed to mbox channel\n");
|
|
return PTR_ERR(chan);
|
|
}
|
|
|
|
ret = device_create_file(&pdev->dev, &dev_attr_set_ddr_capped_freq);
|
|
if (ret)
|
|
dev_err(&pdev->dev, "Couldn't create sysfs attribute\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id aop_qmp_match_tbl[] = {
|
|
{.compatible = "qcom,aop-set-ddr-freq"},
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver aop_qmp_msg_driver = {
|
|
.probe = set_ddr_freq_probe,
|
|
.driver = {
|
|
.name = "aop-set-ddr-freq",
|
|
.suppress_bind_attrs = true,
|
|
.of_match_table = aop_qmp_match_tbl,
|
|
},
|
|
};
|
|
builtin_platform_driver(aop_qmp_msg_driver);
|