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pinctrl: samsung: Replace syscore ops with standard platform device pm_ops 

Once the dependency on PMU driver (for pad retention control) has been
removed, there is no reason to use syscore_ops based suspend/resume.
This patch replaces it with standard platform device pm_ops based solution.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Marek Szyprowski 2017-01-26 10:29:27 +01:00 committed by Linus Walleij
parent dabd145692
commit 2b24efa8e5
1 changed files with 14 additions and 58 deletions
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72
drivers/pinctrl/samsung/pinctrl-samsung.c
View File

@ -29,7 +29,6 @@
#include <linux/irqdomain.h> #include <linux/irqdomain.h>
#include <linux/of_device.h> #include <linux/of_device.h>
#include <linux/spinlock.h> #include <linux/spinlock.h>
#include <linux/syscore_ops.h>
#include "../core.h" #include "../core.h"
#include "pinctrl-samsung.h" #include "pinctrl-samsung.h"
@ -49,9 +48,6 @@ static struct pin_config {
{ "samsung,pin-val", PINCFG_TYPE_DAT }, { "samsung,pin-val", PINCFG_TYPE_DAT },
}; };
/* Global list of devices (struct samsung_pinctrl_drv_data) */
static LIST_HEAD(drvdata_list);
static unsigned int pin_base; static unsigned int pin_base;
static int samsung_get_group_count(struct pinctrl_dev *pctldev) static int samsung_get_group_count(struct pinctrl_dev *pctldev)
@ -1084,22 +1080,18 @@ static int samsung_pinctrl_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, drvdata); platform_set_drvdata(pdev, drvdata);
/* Add to the global list */
list_add_tail(&drvdata->node, &drvdata_list);
return 0; return 0;
} }
#ifdef CONFIG_PM #ifdef CONFIG_PM
/** /**
* samsung_pinctrl_suspend_dev - save pinctrl state for suspend for a device * samsung_pinctrl_suspend - save pinctrl state for suspend
* *
* Save data for all banks handled by this device. * Save data for all banks handled by this device.
*/ */
static void samsung_pinctrl_suspend_dev( static int samsung_pinctrl_suspend(struct device *dev)
struct samsung_pinctrl_drv_data *drvdata)
{ {
struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev);
int i; int i;
for (i = 0; i < drvdata->nr_banks; i++) { for (i = 0; i < drvdata->nr_banks; i++) {
@ -1135,18 +1127,21 @@ static void samsung_pinctrl_suspend_dev(
drvdata->suspend(drvdata); drvdata->suspend(drvdata);
if (drvdata->retention_ctrl && drvdata->retention_ctrl->enable) if (drvdata->retention_ctrl && drvdata->retention_ctrl->enable)
drvdata->retention_ctrl->enable(drvdata); drvdata->retention_ctrl->enable(drvdata);
return 0;
} }
/** /**
* samsung_pinctrl_resume_dev - restore pinctrl state from suspend for a device * samsung_pinctrl_resume - restore pinctrl state from suspend
* *
* Restore one of the banks that was saved during suspend. * Restore one of the banks that was saved during suspend.
* *
* We don't bother doing anything complicated to avoid glitching lines since * We don't bother doing anything complicated to avoid glitching lines since
* we're called before pad retention is turned off. * we're called before pad retention is turned off.
*/ */
static void samsung_pinctrl_resume_dev(struct samsung_pinctrl_drv_data *drvdata) static int samsung_pinctrl_resume(struct device *dev)
{ {
struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev);
int i; int i;
if (drvdata->resume) if (drvdata->resume)
@ -1185,48 +1180,11 @@ static void samsung_pinctrl_resume_dev(struct samsung_pinctrl_drv_data *drvdata)
if (drvdata->retention_ctrl && drvdata->retention_ctrl->disable) if (drvdata->retention_ctrl && drvdata->retention_ctrl->disable)
drvdata->retention_ctrl->disable(drvdata); drvdata->retention_ctrl->disable(drvdata);
}
/**
* samsung_pinctrl_suspend - save pinctrl state for suspend
*
* Save data for all banks across all devices.
*/
static int samsung_pinctrl_suspend(void)
{
struct samsung_pinctrl_drv_data *drvdata;
list_for_each_entry(drvdata, &drvdata_list, node) {
samsung_pinctrl_suspend_dev(drvdata);
}
return 0; return 0;
} }
/**
* samsung_pinctrl_resume - restore pinctrl state for suspend
*
* Restore data for all banks across all devices.
*/
static void samsung_pinctrl_resume(void)
{
struct samsung_pinctrl_drv_data *drvdata;
list_for_each_entry_reverse(drvdata, &drvdata_list, node) {
samsung_pinctrl_resume_dev(drvdata);
}
}
#else
#define samsung_pinctrl_suspend NULL
#define samsung_pinctrl_resume NULL
#endif #endif
static struct syscore_ops samsung_pinctrl_syscore_ops = {
.suspend = samsung_pinctrl_suspend,
.resume = samsung_pinctrl_resume,
};
static const struct of_device_id samsung_pinctrl_dt_match[] = { static const struct of_device_id samsung_pinctrl_dt_match[] = {
#ifdef CONFIG_PINCTRL_EXYNOS #ifdef CONFIG_PINCTRL_EXYNOS
{ .compatible = "samsung,exynos3250-pinctrl", { .compatible = "samsung,exynos3250-pinctrl",
@ -1268,25 +1226,23 @@ static const struct of_device_id samsung_pinctrl_dt_match[] = {
}; };
MODULE_DEVICE_TABLE(of, samsung_pinctrl_dt_match); MODULE_DEVICE_TABLE(of, samsung_pinctrl_dt_match);
static const struct dev_pm_ops samsung_pinctrl_pm_ops = {
SET_LATE_SYSTEM_SLEEP_PM_OPS(samsung_pinctrl_suspend,
samsung_pinctrl_resume)
};
static struct platform_driver samsung_pinctrl_driver = { static struct platform_driver samsung_pinctrl_driver = {
.probe = samsung_pinctrl_probe, .probe = samsung_pinctrl_probe,
.driver = { .driver = {
.name = "samsung-pinctrl", .name = "samsung-pinctrl",
.of_match_table = samsung_pinctrl_dt_match, .of_match_table = samsung_pinctrl_dt_match,
.suppress_bind_attrs = true, .suppress_bind_attrs = true,
.pm = &samsung_pinctrl_pm_ops,
}, },
}; };
static int __init samsung_pinctrl_drv_register(void) static int __init samsung_pinctrl_drv_register(void)
{ {
/*
* Register syscore ops for save/restore of registers across suspend.
* It's important to ensure that this driver is running at an earlier
* initcall level than any arch-specific init calls that install syscore
* ops that turn off pad retention (like exynos_pm_resume).
*/
register_syscore_ops(&samsung_pinctrl_syscore_ops);
return platform_driver_register(&samsung_pinctrl_driver); return platform_driver_register(&samsung_pinctrl_driver);
} }
postcore_initcall(samsung_pinctrl_drv_register); postcore_initcall(samsung_pinctrl_drv_register);