| Message ID | 1371032708-9242-4-git-send-email-pekon@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Pekon Gupta <pekon@ti.com> writes: > From: avinash philip <avinashphilip@ti.com> > > In low power modes of AM335X platforms, peripherals power is cut off. > This patch supports low power sleep transition support for ELM driver. This series needs a bit more description about what "low power sleep transition" is, and how adding runtime PM calls makes this transition happen. Kevin > Signed-off-by: Philip Avinash <avinashphilip@ti.com> > Signed-off-by: Pekon Gupta <pekon@ti.com> > --- > drivers/mtd/devices/elm.c | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/drivers/mtd/devices/elm.c b/drivers/mtd/devices/elm.c > index dccef9f..171efcd 100644 > --- a/drivers/mtd/devices/elm.c > +++ b/drivers/mtd/devices/elm.c > @@ -20,6 +20,7 @@ > #include <linux/interrupt.h> > #include <linux/io.h> > #include <linux/of.h> > +#include <linux/sched.h> > #include <linux/pm_runtime.h> > #include <linux/platform_data/elm.h> > > @@ -385,6 +386,23 @@ static int elm_remove(struct platform_device *pdev) > return 0; > } > > +static int elm_suspend(struct device *dev) > +{ > + pm_runtime_put_sync(dev); > + return 0; > +} > + > +static int elm_resume(struct device *dev) > +{ > + struct elm_info *info = dev_get_drvdata(dev); > + > + pm_runtime_get_sync(dev); > + elm_config(dev, info->bch_type); > + return 0; > +} > + > +static SIMPLE_DEV_PM_OPS(elm_pm_ops, elm_suspend, elm_resume); > + > #ifdef CONFIG_OF > static const struct of_device_id elm_of_match[] = { > { .compatible = "ti,am3352-elm" }, > @@ -398,6 +416,7 @@ static struct platform_driver elm_driver = { > .name = "elm", > .owner = THIS_MODULE, > .of_match_table = of_match_ptr(elm_of_match), > + .pm = &elm_pm_ops, > }, > .probe = elm_probe, > .remove = elm_remove, -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mtd/devices/elm.c b/drivers/mtd/devices/elm.c index dccef9f..171efcd 100644 --- a/drivers/mtd/devices/elm.c +++ b/drivers/mtd/devices/elm.c @@ -20,6 +20,7 @@ #include <linux/interrupt.h> #include <linux/io.h> #include <linux/of.h> +#include <linux/sched.h> #include <linux/pm_runtime.h> #include <linux/platform_data/elm.h> @@ -385,6 +386,23 @@ static int elm_remove(struct platform_device *pdev) return 0; } +static int elm_suspend(struct device *dev) +{ + pm_runtime_put_sync(dev); + return 0; +} + +static int elm_resume(struct device *dev) +{ + struct elm_info *info = dev_get_drvdata(dev); + + pm_runtime_get_sync(dev); + elm_config(dev, info->bch_type); + return 0; +} + +static SIMPLE_DEV_PM_OPS(elm_pm_ops, elm_suspend, elm_resume); + #ifdef CONFIG_OF static const struct of_device_id elm_of_match[] = { { .compatible = "ti,am3352-elm" }, @@ -398,6 +416,7 @@ static struct platform_driver elm_driver = { .name = "elm", .owner = THIS_MODULE, .of_match_table = of_match_ptr(elm_of_match), + .pm = &elm_pm_ops, }, .probe = elm_probe, .remove = elm_remove,