threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2019 MediaTek Inc.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/device.h>
|
|
#include <linux/cpuidle.h>
|
|
#include <linux/soc/mediatek/mtk-lpm.h>
|
|
|
|
#define MTK_PWR_CONSERVATION_PREPARE (0)
|
|
#define MTK_PWR_CONSERVATION_RESUME (1)
|
|
|
|
typedef int (*mtk_pwr_conservation_fn)(int type,
|
|
struct cpuidle_driver *drv,
|
|
int index);
|
|
|
|
static struct mtk_cpuidle_op __rcu *mtk_lpm_ops __read_mostly;
|
|
|
|
int mtk_lpm_drv_cpuidle_ops_set(struct mtk_cpuidle_op *op)
|
|
{
|
|
int ret = 0;
|
|
|
|
cpuidle_pause_and_lock();
|
|
|
|
if (op && !mtk_lpm_ops)
|
|
rcu_assign_pointer(mtk_lpm_ops, op);
|
|
else
|
|
ret = -EACCES;
|
|
|
|
cpuidle_resume_and_unlock();
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(mtk_lpm_drv_cpuidle_ops_set);
|
|
|
|
void mtk_lpm_drv_cpuidle_ops_clr(void)
|
|
{
|
|
cpuidle_pause_and_lock();
|
|
rcu_assign_pointer(mtk_lpm_ops, NULL);
|
|
cpuidle_resume_and_unlock();
|
|
}
|
|
EXPORT_SYMBOL(mtk_lpm_drv_cpuidle_ops_clr);
|
|
|
|
int mtk_lpm_pwr_conservation(int type,
|
|
struct cpuidle_driver *drv,
|
|
int index)
|
|
{
|
|
int ret = -EBADR;
|
|
|
|
if (!mtk_lpm_ops)
|
|
return ret;
|
|
|
|
switch (type) {
|
|
case MTK_PWR_CONSERVATION_PREPARE:
|
|
if (mtk_lpm_ops->cpuidle_prepare)
|
|
ret = mtk_lpm_ops->cpuidle_prepare(drv, index);
|
|
break;
|
|
case MTK_PWR_CONSERVATION_RESUME:
|
|
if (mtk_lpm_ops->cpuidle_resume)
|
|
mtk_lpm_ops->cpuidle_resume(drv, index);
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mtk_lp_pm_driver_probe(struct platform_device *pdev)
|
|
{
|
|
struct platform_device *mtk_cpuidle_pm_dev;
|
|
int ret = -ENOMEM;
|
|
mtk_pwr_conservation_fn mtk_lpm_pwr = mtk_lpm_pwr_conservation;
|
|
|
|
mtk_cpuidle_pm_dev =
|
|
platform_device_alloc(MTK_CPUIDLE_PM_NAME, -1);
|
|
|
|
if (!mtk_cpuidle_pm_dev)
|
|
goto out_probe_alloc_fail;
|
|
|
|
mtk_cpuidle_pm_dev->dev.parent = &pdev->dev;
|
|
ret = platform_device_add(mtk_cpuidle_pm_dev);
|
|
|
|
if (ret)
|
|
goto put_device;
|
|
|
|
ret = platform_device_add_data(mtk_cpuidle_pm_dev,
|
|
&mtk_lpm_pwr,
|
|
sizeof(mtk_lpm_pwr));
|
|
if (ret) {
|
|
pr_info("[%s:%d] - Device add data fail!\n",
|
|
__FILE__, __LINE__);
|
|
goto put_device;
|
|
}
|
|
|
|
device_init_wakeup(&mtk_cpuidle_pm_dev->dev, true);
|
|
|
|
return 0;
|
|
|
|
put_device:
|
|
platform_device_put(mtk_cpuidle_pm_dev);
|
|
out_probe_alloc_fail:
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct of_device_id of_mtk_lp_pm_match[] = {
|
|
{ .compatible = "mediatek,mtk-lpm" },
|
|
{}
|
|
};
|
|
|
|
static struct platform_driver mtk_lp_pm_driver = {
|
|
.probe = mtk_lp_pm_driver_probe,
|
|
.driver = {
|
|
.name = "mtk_lpm_driver",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(of_mtk_lp_pm_match),
|
|
},
|
|
};
|
|
builtin_platform_driver(mtk_lp_pm_driver);
|