| Message ID | 20180424062741.7891-2-vigneshr@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Vignesh, On Tue, Apr 24, 2018 at 11:57:39AM +0530, Vignesh R wrote: > On AM335x, ti_am335x_tsc can wake up the system from suspend, mark the > IRQ as wakeup capable, so that device irq is not disabled during system > suspend. > > Signed-off-by: Vignesh R <vigneshr@ti.com> > --- > v3: Drop unneeded device_may_wakeup() check > > drivers/input/touchscreen/ti_am335x_tsc.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c > index f1043ae71dcc..3908c21862c7 100644 > --- a/drivers/input/touchscreen/ti_am335x_tsc.c > +++ b/drivers/input/touchscreen/ti_am335x_tsc.c > @@ -27,6 +27,7 @@ > #include <linux/of.h> > #include <linux/of_device.h> > #include <linux/sort.h> > +#include <linux/pm_wakeirq.h> > > #include <linux/mfd/ti_am335x_tscadc.h> > > @@ -432,6 +433,10 @@ static int titsc_probe(struct platform_device *pdev) > goto err_free_mem; > } > > + err = dev_pm_set_wake_irq(tscadc_dev->dev, ts_dev->irq); > + if (err) > + dev_err(&pdev->dev, "irq wake enable failed.\n"); > + Looking at this driver some more: why do we have the parent MFD device as wakeup source? It seems we have 2 independent interrupt lines, one in IIO and one in input and we could actually have the touchscreen itself to be one of the wakeup devices? I.e. i'd expect err = dev_pm_set_wake_irq(&pdev->dev, ts_dev->irq); here and we should be checking the touchscreen pdev in suspend/resume when checking whether to program the controller for wakeups. > titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO0THRES); > titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_EOS); > err = titsc_config_wires(ts_dev); > @@ -462,6 +467,7 @@ static int titsc_probe(struct platform_device *pdev) > return 0; > > err_free_irq: > + dev_pm_clear_wake_irq(tscadc_dev->dev); > free_irq(ts_dev->irq, ts_dev); > err_free_mem: > input_free_device(input_dev); > @@ -474,6 +480,7 @@ static int titsc_remove(struct platform_device *pdev) > struct titsc *ts_dev = platform_get_drvdata(pdev); > u32 steps; > > + dev_pm_clear_wake_irq(ts_dev->mfd_tscadc->dev); > free_irq(ts_dev->irq, ts_dev); > > /* total steps followed by the enable mask */ > -- > 2.17.0 > Thanks.
diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c index f1043ae71dcc..3908c21862c7 100644 --- a/drivers/input/touchscreen/ti_am335x_tsc.c +++ b/drivers/input/touchscreen/ti_am335x_tsc.c @@ -27,6 +27,7 @@ #include <linux/of.h> #include <linux/of_device.h> #include <linux/sort.h> +#include <linux/pm_wakeirq.h> #include <linux/mfd/ti_am335x_tscadc.h> @@ -432,6 +433,10 @@ static int titsc_probe(struct platform_device *pdev) goto err_free_mem; } + err = dev_pm_set_wake_irq(tscadc_dev->dev, ts_dev->irq); + if (err) + dev_err(&pdev->dev, "irq wake enable failed.\n"); + titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO0THRES); titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_EOS); err = titsc_config_wires(ts_dev); @@ -462,6 +467,7 @@ static int titsc_probe(struct platform_device *pdev) return 0; err_free_irq: + dev_pm_clear_wake_irq(tscadc_dev->dev); free_irq(ts_dev->irq, ts_dev); err_free_mem: input_free_device(input_dev); @@ -474,6 +480,7 @@ static int titsc_remove(struct platform_device *pdev) struct titsc *ts_dev = platform_get_drvdata(pdev); u32 steps; + dev_pm_clear_wake_irq(ts_dev->mfd_tscadc->dev); free_irq(ts_dev->irq, ts_dev); /* total steps followed by the enable mask */
On AM335x, ti_am335x_tsc can wake up the system from suspend, mark the IRQ as wakeup capable, so that device irq is not disabled during system suspend. Signed-off-by: Vignesh R <vigneshr@ti.com> --- v3: Drop unneeded device_may_wakeup() check drivers/input/touchscreen/ti_am335x_tsc.c | 7 +++++++ 1 file changed, 7 insertions(+)