mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-17 01:34:00 +08:00
watchdog: da9063: optionally disable watchdog during suspend
Optionally disable watchdog during suspend (if enabled) and re-enable it upon resume. This enables boards to sleep without being interrupted by the watchdog. This patch is based on commitf6c98b0838
("watchdog: da9062: add power management ops") and commit8541673d2a
("watchdog: da9062: fix power management ops") and brings the same functionality to DA9063. Signed-off-by: Primoz Fiser <primoz.fiser@norik.com> Reviewed-by: Adam Thomson <DLG-Adam.Thomson.Opensource@dm.renesas.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20220422072713.3172345-2-primoz.fiser@norik.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
parent
b1912875a5
commit
a7ceca4398
@ -18,6 +18,7 @@
|
||||
#include <linux/delay.h>
|
||||
#include <linux/mfd/da9063/registers.h>
|
||||
#include <linux/mfd/da9063/core.h>
|
||||
#include <linux/property.h>
|
||||
#include <linux/regmap.h>
|
||||
|
||||
/*
|
||||
@ -26,6 +27,8 @@
|
||||
* others: timeout = 2048 ms * 2^(TWDSCALE-1).
|
||||
*/
|
||||
static const unsigned int wdt_timeout[] = { 0, 2, 4, 8, 16, 32, 65, 131 };
|
||||
static bool use_sw_pm;
|
||||
|
||||
#define DA9063_TWDSCALE_DISABLE 0
|
||||
#define DA9063_TWDSCALE_MIN 1
|
||||
#define DA9063_TWDSCALE_MAX (ARRAY_SIZE(wdt_timeout) - 1)
|
||||
@ -218,6 +221,8 @@ static int da9063_wdt_probe(struct platform_device *pdev)
|
||||
if (!wdd)
|
||||
return -ENOMEM;
|
||||
|
||||
use_sw_pm = device_property_present(dev, "dlg,use-sw-pm");
|
||||
|
||||
wdd->info = &da9063_watchdog_info;
|
||||
wdd->ops = &da9063_watchdog_ops;
|
||||
wdd->min_timeout = DA9063_WDT_MIN_TIMEOUT;
|
||||
@ -228,6 +233,7 @@ static int da9063_wdt_probe(struct platform_device *pdev)
|
||||
|
||||
watchdog_set_restart_priority(wdd, 128);
|
||||
watchdog_set_drvdata(wdd, da9063);
|
||||
dev_set_drvdata(dev, wdd);
|
||||
|
||||
wdd->timeout = DA9063_WDG_TIMEOUT;
|
||||
|
||||
@ -249,10 +255,40 @@ static int da9063_wdt_probe(struct platform_device *pdev)
|
||||
return devm_watchdog_register_device(dev, wdd);
|
||||
}
|
||||
|
||||
static int __maybe_unused da9063_wdt_suspend(struct device *dev)
|
||||
{
|
||||
struct watchdog_device *wdd = dev_get_drvdata(dev);
|
||||
|
||||
if (!use_sw_pm)
|
||||
return 0;
|
||||
|
||||
if (watchdog_active(wdd))
|
||||
return da9063_wdt_stop(wdd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused da9063_wdt_resume(struct device *dev)
|
||||
{
|
||||
struct watchdog_device *wdd = dev_get_drvdata(dev);
|
||||
|
||||
if (!use_sw_pm)
|
||||
return 0;
|
||||
|
||||
if (watchdog_active(wdd))
|
||||
return da9063_wdt_start(wdd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(da9063_wdt_pm_ops,
|
||||
da9063_wdt_suspend, da9063_wdt_resume);
|
||||
|
||||
static struct platform_driver da9063_wdt_driver = {
|
||||
.probe = da9063_wdt_probe,
|
||||
.driver = {
|
||||
.name = DA9063_DRVNAME_WATCHDOG,
|
||||
.pm = &da9063_wdt_pm_ops,
|
||||
},
|
||||
};
|
||||
module_platform_driver(da9063_wdt_driver);
|
||||
|
Loading…
Reference in New Issue
Block a user