@@ -16,6 +16,7 @@
#include <linux/jiffies.h>
#include <linux/mfd/da9062/registers.h>
#include <linux/mfd/da9062/core.h>
+#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/of.h>
@@ -31,6 +32,7 @@ static const unsigned int wdt_timeout[] = { 0, 2, 4, 8, 16, 32, 65, 131 };
struct da9062_watchdog {
struct da9062 *hw;
struct watchdog_device wdtdev;
+ bool use_sw_pm;
};
static unsigned int da9062_wdt_timeout_to_sel(unsigned int secs)
@@ -200,6 +202,8 @@ static int da9062_wdt_probe(struct platform_device *pdev)
if (!wdt)
return -ENOMEM;
+ wdt->use_sw_pm = device_property_present(dev, "dlg,use-sw-pm");
+
wdt->hw = chip;
wdt->wdtdev.info = &da9062_watchdog_info;
@@ -226,6 +230,10 @@ static int da9062_wdt_probe(struct platform_device *pdev)
static int __maybe_unused da9062_wdt_suspend(struct device *dev)
{
struct watchdog_device *wdd = dev_get_drvdata(dev);
+ struct da9062_watchdog *wdt = watchdog_get_drvdata(wdd);
+
+ if (!wdt->use_sw_pm)
+ return 0;
if (watchdog_active(wdd))
return da9062_wdt_stop(wdd);
@@ -236,6 +244,10 @@ static int __maybe_unused da9062_wdt_suspend(struct device *dev)
static int __maybe_unused da9062_wdt_resume(struct device *dev)
{
struct watchdog_device *wdd = dev_get_drvdata(dev);
+ struct da9062_watchdog *wdt = watchdog_get_drvdata(wdd);
+
+ if (!wdt->use_sw_pm)
+ return 0;
if (watchdog_active(wdd))
return da9062_wdt_start(wdd);
This fixes commit f6c98b08381c ("watchdog: da9062: add power management ops"). During discussion [1] we agreed that this should be configurable because it is a device quirk if we can't use the hw watchdog auto suspend function. [1] https://lore.kernel.org/linux-watchdog/20191128171931.22563-1-m.felsch@pengutronix.de/ Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> --- Hi, unfortunately I forgot to add an v2 tag [2] and Guenter took the wrong patch version. It is completely my fault anyway this should be part of the next rc tag for 5.6. The device property should be applied already so this patch adds only the usage and therefore don't include the dt-folks in the to: and cc:. Regards, Marco [2] https://lkml.org/lkml/2020/1/8/210 drivers/watchdog/da9062_wdt.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)