Re: [PATCH 1/2] watchdog: add wdt suspend/resume support
On Tue, 2015-07-21 at 20:45 -0700, Guenter Roeck wrote:
> On 07/21/2015 08:26 PM, Eddie Huang wrote:
> > From: Greta Zhang
> >
> > add wdt driver suspend/resume support
> >
> > Signed-off-by: Greta Zhang
> > Signed-off-by: Roger Lu
> > Signed-off-by: Eddie Huang
> > ---
> > drivers/watchdog/mtk_wdt.c | 38 ++
> > 1 file changed, 38 insertions(+)
> >
> > diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
> > index 938b987..5ef3910 100644
> > --- a/drivers/watchdog/mtk_wdt.c
> > +++ b/drivers/watchdog/mtk_wdt.c
> > @@ -65,6 +65,7 @@ struct mtk_wdt_dev {
> > struct watchdog_device wdt_dev;
> > void __iomem *wdt_base;
> > struct notifier_block restart_handler;
> > + bool started;
>
> Any reason why you can not use watchdog_active() ?
Will change to use watchdog_active()
>
> > };
> >
> > static int mtk_reset_handler(struct notifier_block *this, unsigned long
> > mode,
> > @@ -125,6 +126,8 @@ static int mtk_wdt_stop(struct watchdog_device *wdt_dev)
> > reg &= ~WDT_MODE_EN;
> > iowrite32(reg, wdt_base + WDT_MODE);
> >
> > + mtk_wdt->started = false;
> > +
> > return 0;
> > }
> >
> > @@ -135,6 +138,8 @@ static int mtk_wdt_start(struct watchdog_device
> > *wdt_dev)
> > void __iomem *wdt_base = mtk_wdt->wdt_base;
> > int ret;
> >
> > + mtk_wdt->started = true;
> > +
> > ret = mtk_wdt_set_timeout(wdt_dev, wdt_dev->timeout);
> > if (ret < 0)
> > return ret;
> > @@ -174,6 +179,8 @@ static int mtk_wdt_probe(struct platform_device *pdev)
> >
> > platform_set_drvdata(pdev, mtk_wdt);
> >
> > + mtk_wdt->started = false;
> > +
> > res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > mtk_wdt->wdt_base = devm_ioremap_resource(>dev, res);
> > if (IS_ERR(mtk_wdt->wdt_base))
> > @@ -221,6 +228,35 @@ static int mtk_wdt_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > +#ifdef CONFIG_PM
> > +static int mtk_wdt_suspend(struct platform_device *pdev, pm_message_t
> > state)
> > +{
> > + struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
> > +
> > + if (mtk_wdt->started) {
> > + mtk_wdt_stop(_wdt->wdt_dev);
> > + mtk_wdt->started = true;
>
> ?
>
Because mtk_wdt_stop() change mtk_wdt->started to false, so set
mtk_wdt->started back to true here. This code is not necessary if use
watchdog_active()
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int mtk_wdt_resume(struct platform_device *pdev)
> > +{
> > + struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
> > +
> > + if (mtk_wdt->started) {
> > + mtk_wdt_start(_wdt->wdt_dev);
> > + mtk_wdt_ping(_wdt->wdt_dev);
> > + }
> > +
> > + return 0;
> > +}
> > +#else
> > +#definemtk_wdt_suspend NULL
> > +#definemtk_wdt_resume NULL
> > +#endif
> > +
> > static const struct of_device_id mtk_wdt_dt_ids[] = {
> > { .compatible = "mediatek,mt6589-wdt" },
> > { /* sentinel */ }
> > @@ -230,6 +266,8 @@ MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
> > static struct platform_driver mtk_wdt_driver = {
> > .probe = mtk_wdt_probe,
> > .remove = mtk_wdt_remove,
> > + .suspend= mtk_wdt_suspend,
> > + .resume = mtk_wdt_resume,
> > .driver = {
> > .name = DRV_NAME,
> > .of_match_table = mtk_wdt_dt_ids,
>
> Typically drivers would use struct dev_pm_ops and
> .pm = _wdt_pm_ops,
>
> Any reason for not using the same mechanism ?
>
Will change to use dev_pm_ops
Eddie
Thanks
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Re: [PATCH 1/2] watchdog: add wdt suspend/resume support
On Tue, 2015-07-21 at 20:45 -0700, Guenter Roeck wrote:
On 07/21/2015 08:26 PM, Eddie Huang wrote:
From: Greta Zhang greta.zh...@mediatek.com
add wdt driver suspend/resume support
Signed-off-by: Greta Zhang greta.zh...@mediatek.com
Signed-off-by: Roger Lu roger...@mediatek.com
Signed-off-by: Eddie Huang eddie.hu...@mediatek.com
---
drivers/watchdog/mtk_wdt.c | 38 ++
1 file changed, 38 insertions(+)
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 938b987..5ef3910 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -65,6 +65,7 @@ struct mtk_wdt_dev {
struct watchdog_device wdt_dev;
void __iomem *wdt_base;
struct notifier_block restart_handler;
+ bool started;
Any reason why you can not use watchdog_active() ?
Will change to use watchdog_active()
};
static int mtk_reset_handler(struct notifier_block *this, unsigned long
mode,
@@ -125,6 +126,8 @@ static int mtk_wdt_stop(struct watchdog_device *wdt_dev)
reg = ~WDT_MODE_EN;
iowrite32(reg, wdt_base + WDT_MODE);
+ mtk_wdt-started = false;
+
return 0;
}
@@ -135,6 +138,8 @@ static int mtk_wdt_start(struct watchdog_device
*wdt_dev)
void __iomem *wdt_base = mtk_wdt-wdt_base;
int ret;
+ mtk_wdt-started = true;
+
ret = mtk_wdt_set_timeout(wdt_dev, wdt_dev-timeout);
if (ret 0)
return ret;
@@ -174,6 +179,8 @@ static int mtk_wdt_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mtk_wdt);
+ mtk_wdt-started = false;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mtk_wdt-wdt_base = devm_ioremap_resource(pdev-dev, res);
if (IS_ERR(mtk_wdt-wdt_base))
@@ -221,6 +228,35 @@ static int mtk_wdt_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int mtk_wdt_suspend(struct platform_device *pdev, pm_message_t
state)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt-started) {
+ mtk_wdt_stop(mtk_wdt-wdt_dev);
+ mtk_wdt-started = true;
?
Because mtk_wdt_stop() change mtk_wdt-started to false, so set
mtk_wdt-started back to true here. This code is not necessary if use
watchdog_active()
+ }
+
+ return 0;
+}
+
+static int mtk_wdt_resume(struct platform_device *pdev)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt-started) {
+ mtk_wdt_start(mtk_wdt-wdt_dev);
+ mtk_wdt_ping(mtk_wdt-wdt_dev);
+ }
+
+ return 0;
+}
+#else
+#definemtk_wdt_suspend NULL
+#definemtk_wdt_resume NULL
+#endif
+
static const struct of_device_id mtk_wdt_dt_ids[] = {
{ .compatible = mediatek,mt6589-wdt },
{ /* sentinel */ }
@@ -230,6 +266,8 @@ MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
static struct platform_driver mtk_wdt_driver = {
.probe = mtk_wdt_probe,
.remove = mtk_wdt_remove,
+ .suspend= mtk_wdt_suspend,
+ .resume = mtk_wdt_resume,
.driver = {
.name = DRV_NAME,
.of_match_table = mtk_wdt_dt_ids,
Typically drivers would use struct dev_pm_ops and
.pm = mtk_wdt_pm_ops,
Any reason for not using the same mechanism ?
Will change to use dev_pm_ops
Eddie
Thanks
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 1/2] watchdog: add wdt suspend/resume support
On 07/21/2015 08:26 PM, Eddie Huang wrote:
From: Greta Zhang
add wdt driver suspend/resume support
Signed-off-by: Greta Zhang
Signed-off-by: Roger Lu
Signed-off-by: Eddie Huang
---
drivers/watchdog/mtk_wdt.c | 38 ++
1 file changed, 38 insertions(+)
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 938b987..5ef3910 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -65,6 +65,7 @@ struct mtk_wdt_dev {
struct watchdog_device wdt_dev;
void __iomem *wdt_base;
struct notifier_block restart_handler;
+ bool started;
Any reason why you can not use watchdog_active() ?
};
static int mtk_reset_handler(struct notifier_block *this, unsigned long mode,
@@ -125,6 +126,8 @@ static int mtk_wdt_stop(struct watchdog_device *wdt_dev)
reg &= ~WDT_MODE_EN;
iowrite32(reg, wdt_base + WDT_MODE);
+ mtk_wdt->started = false;
+
return 0;
}
@@ -135,6 +138,8 @@ static int mtk_wdt_start(struct watchdog_device *wdt_dev)
void __iomem *wdt_base = mtk_wdt->wdt_base;
int ret;
+ mtk_wdt->started = true;
+
ret = mtk_wdt_set_timeout(wdt_dev, wdt_dev->timeout);
if (ret < 0)
return ret;
@@ -174,6 +179,8 @@ static int mtk_wdt_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mtk_wdt);
+ mtk_wdt->started = false;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mtk_wdt->wdt_base = devm_ioremap_resource(>dev, res);
if (IS_ERR(mtk_wdt->wdt_base))
@@ -221,6 +228,35 @@ static int mtk_wdt_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int mtk_wdt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt->started) {
+ mtk_wdt_stop(_wdt->wdt_dev);
+ mtk_wdt->started = true;
?
+ }
+
+ return 0;
+}
+
+static int mtk_wdt_resume(struct platform_device *pdev)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt->started) {
+ mtk_wdt_start(_wdt->wdt_dev);
+ mtk_wdt_ping(_wdt->wdt_dev);
+ }
+
+ return 0;
+}
+#else
+#definemtk_wdt_suspend NULL
+#definemtk_wdt_resume NULL
+#endif
+
static const struct of_device_id mtk_wdt_dt_ids[] = {
{ .compatible = "mediatek,mt6589-wdt" },
{ /* sentinel */ }
@@ -230,6 +266,8 @@ MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
static struct platform_driver mtk_wdt_driver = {
.probe = mtk_wdt_probe,
.remove = mtk_wdt_remove,
+ .suspend= mtk_wdt_suspend,
+ .resume = mtk_wdt_resume,
.driver = {
.name = DRV_NAME,
.of_match_table = mtk_wdt_dt_ids,
Typically drivers would use struct dev_pm_ops and
.pm = _wdt_pm_ops,
Any reason for not using the same mechanism ?
Thanks,
Guenter
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[PATCH 1/2] watchdog: add wdt suspend/resume support
From: Greta Zhang
add wdt driver suspend/resume support
Signed-off-by: Greta Zhang
Signed-off-by: Roger Lu
Signed-off-by: Eddie Huang
---
drivers/watchdog/mtk_wdt.c | 38 ++
1 file changed, 38 insertions(+)
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 938b987..5ef3910 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -65,6 +65,7 @@ struct mtk_wdt_dev {
struct watchdog_device wdt_dev;
void __iomem *wdt_base;
struct notifier_block restart_handler;
+ bool started;
};
static int mtk_reset_handler(struct notifier_block *this, unsigned long mode,
@@ -125,6 +126,8 @@ static int mtk_wdt_stop(struct watchdog_device *wdt_dev)
reg &= ~WDT_MODE_EN;
iowrite32(reg, wdt_base + WDT_MODE);
+ mtk_wdt->started = false;
+
return 0;
}
@@ -135,6 +138,8 @@ static int mtk_wdt_start(struct watchdog_device *wdt_dev)
void __iomem *wdt_base = mtk_wdt->wdt_base;
int ret;
+ mtk_wdt->started = true;
+
ret = mtk_wdt_set_timeout(wdt_dev, wdt_dev->timeout);
if (ret < 0)
return ret;
@@ -174,6 +179,8 @@ static int mtk_wdt_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mtk_wdt);
+ mtk_wdt->started = false;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mtk_wdt->wdt_base = devm_ioremap_resource(>dev, res);
if (IS_ERR(mtk_wdt->wdt_base))
@@ -221,6 +228,35 @@ static int mtk_wdt_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int mtk_wdt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt->started) {
+ mtk_wdt_stop(_wdt->wdt_dev);
+ mtk_wdt->started = true;
+ }
+
+ return 0;
+}
+
+static int mtk_wdt_resume(struct platform_device *pdev)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt->started) {
+ mtk_wdt_start(_wdt->wdt_dev);
+ mtk_wdt_ping(_wdt->wdt_dev);
+ }
+
+ return 0;
+}
+#else
+#definemtk_wdt_suspend NULL
+#definemtk_wdt_resume NULL
+#endif
+
static const struct of_device_id mtk_wdt_dt_ids[] = {
{ .compatible = "mediatek,mt6589-wdt" },
{ /* sentinel */ }
@@ -230,6 +266,8 @@ MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
static struct platform_driver mtk_wdt_driver = {
.probe = mtk_wdt_probe,
.remove = mtk_wdt_remove,
+ .suspend= mtk_wdt_suspend,
+ .resume = mtk_wdt_resume,
.driver = {
.name = DRV_NAME,
.of_match_table = mtk_wdt_dt_ids,
--
1.8.1.1.dirty
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Please read the FAQ at http://www.tux.org/lkml/
[PATCH 1/2] watchdog: add wdt suspend/resume support
From: Greta Zhang greta.zh...@mediatek.com
add wdt driver suspend/resume support
Signed-off-by: Greta Zhang greta.zh...@mediatek.com
Signed-off-by: Roger Lu roger...@mediatek.com
Signed-off-by: Eddie Huang eddie.hu...@mediatek.com
---
drivers/watchdog/mtk_wdt.c | 38 ++
1 file changed, 38 insertions(+)
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 938b987..5ef3910 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -65,6 +65,7 @@ struct mtk_wdt_dev {
struct watchdog_device wdt_dev;
void __iomem *wdt_base;
struct notifier_block restart_handler;
+ bool started;
};
static int mtk_reset_handler(struct notifier_block *this, unsigned long mode,
@@ -125,6 +126,8 @@ static int mtk_wdt_stop(struct watchdog_device *wdt_dev)
reg = ~WDT_MODE_EN;
iowrite32(reg, wdt_base + WDT_MODE);
+ mtk_wdt-started = false;
+
return 0;
}
@@ -135,6 +138,8 @@ static int mtk_wdt_start(struct watchdog_device *wdt_dev)
void __iomem *wdt_base = mtk_wdt-wdt_base;
int ret;
+ mtk_wdt-started = true;
+
ret = mtk_wdt_set_timeout(wdt_dev, wdt_dev-timeout);
if (ret 0)
return ret;
@@ -174,6 +179,8 @@ static int mtk_wdt_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mtk_wdt);
+ mtk_wdt-started = false;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mtk_wdt-wdt_base = devm_ioremap_resource(pdev-dev, res);
if (IS_ERR(mtk_wdt-wdt_base))
@@ -221,6 +228,35 @@ static int mtk_wdt_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int mtk_wdt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt-started) {
+ mtk_wdt_stop(mtk_wdt-wdt_dev);
+ mtk_wdt-started = true;
+ }
+
+ return 0;
+}
+
+static int mtk_wdt_resume(struct platform_device *pdev)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt-started) {
+ mtk_wdt_start(mtk_wdt-wdt_dev);
+ mtk_wdt_ping(mtk_wdt-wdt_dev);
+ }
+
+ return 0;
+}
+#else
+#definemtk_wdt_suspend NULL
+#definemtk_wdt_resume NULL
+#endif
+
static const struct of_device_id mtk_wdt_dt_ids[] = {
{ .compatible = mediatek,mt6589-wdt },
{ /* sentinel */ }
@@ -230,6 +266,8 @@ MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
static struct platform_driver mtk_wdt_driver = {
.probe = mtk_wdt_probe,
.remove = mtk_wdt_remove,
+ .suspend= mtk_wdt_suspend,
+ .resume = mtk_wdt_resume,
.driver = {
.name = DRV_NAME,
.of_match_table = mtk_wdt_dt_ids,
--
1.8.1.1.dirty
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 1/2] watchdog: add wdt suspend/resume support
On 07/21/2015 08:26 PM, Eddie Huang wrote:
From: Greta Zhang greta.zh...@mediatek.com
add wdt driver suspend/resume support
Signed-off-by: Greta Zhang greta.zh...@mediatek.com
Signed-off-by: Roger Lu roger...@mediatek.com
Signed-off-by: Eddie Huang eddie.hu...@mediatek.com
---
drivers/watchdog/mtk_wdt.c | 38 ++
1 file changed, 38 insertions(+)
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 938b987..5ef3910 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -65,6 +65,7 @@ struct mtk_wdt_dev {
struct watchdog_device wdt_dev;
void __iomem *wdt_base;
struct notifier_block restart_handler;
+ bool started;
Any reason why you can not use watchdog_active() ?
};
static int mtk_reset_handler(struct notifier_block *this, unsigned long mode,
@@ -125,6 +126,8 @@ static int mtk_wdt_stop(struct watchdog_device *wdt_dev)
reg = ~WDT_MODE_EN;
iowrite32(reg, wdt_base + WDT_MODE);
+ mtk_wdt-started = false;
+
return 0;
}
@@ -135,6 +138,8 @@ static int mtk_wdt_start(struct watchdog_device *wdt_dev)
void __iomem *wdt_base = mtk_wdt-wdt_base;
int ret;
+ mtk_wdt-started = true;
+
ret = mtk_wdt_set_timeout(wdt_dev, wdt_dev-timeout);
if (ret 0)
return ret;
@@ -174,6 +179,8 @@ static int mtk_wdt_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mtk_wdt);
+ mtk_wdt-started = false;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mtk_wdt-wdt_base = devm_ioremap_resource(pdev-dev, res);
if (IS_ERR(mtk_wdt-wdt_base))
@@ -221,6 +228,35 @@ static int mtk_wdt_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int mtk_wdt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt-started) {
+ mtk_wdt_stop(mtk_wdt-wdt_dev);
+ mtk_wdt-started = true;
?
+ }
+
+ return 0;
+}
+
+static int mtk_wdt_resume(struct platform_device *pdev)
+{
+ struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+ if (mtk_wdt-started) {
+ mtk_wdt_start(mtk_wdt-wdt_dev);
+ mtk_wdt_ping(mtk_wdt-wdt_dev);
+ }
+
+ return 0;
+}
+#else
+#definemtk_wdt_suspend NULL
+#definemtk_wdt_resume NULL
+#endif
+
static const struct of_device_id mtk_wdt_dt_ids[] = {
{ .compatible = mediatek,mt6589-wdt },
{ /* sentinel */ }
@@ -230,6 +266,8 @@ MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
static struct platform_driver mtk_wdt_driver = {
.probe = mtk_wdt_probe,
.remove = mtk_wdt_remove,
+ .suspend= mtk_wdt_suspend,
+ .resume = mtk_wdt_resume,
.driver = {
.name = DRV_NAME,
.of_match_table = mtk_wdt_dt_ids,
Typically drivers would use struct dev_pm_ops and
.pm = mtk_wdt_pm_ops,
Any reason for not using the same mechanism ?
Thanks,
Guenter
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