| Message ID | 20180630103318.25355-4-vigneshr@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Sat, 30 Jun 2018, Vignesh R wrote: > If a child device like touchscreen is wakeup capable, then keep ADC > interface on, so that a touching resistive screen will generate wakeup > event to the system. > > Signed-off-by: Vignesh R <vigneshr@ti.com> > --- > drivers/mfd/ti_am335x_tscadc.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) For my own reference: Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
On Sat, 30 Jun 2018, Vignesh R wrote: > If a child device like touchscreen is wakeup capable, then keep ADC > interface on, so that a touching resistive screen will generate wakeup > event to the system. > > Signed-off-by: Vignesh R <vigneshr@ti.com> > --- > drivers/mfd/ti_am335x_tscadc.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) Applied, thanks.
diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c index 858c1a071a81..c21ed54d1662 100644 --- a/drivers/mfd/ti_am335x_tscadc.c +++ b/drivers/mfd/ti_am335x_tscadc.c @@ -294,11 +294,24 @@ static int ti_tscadc_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused ti_tscadc_can_wakeup(struct device *dev, void *data) +{ + return device_may_wakeup(dev); +} + static int __maybe_unused tscadc_suspend(struct device *dev) { struct ti_tscadc_dev *tscadc = dev_get_drvdata(dev); regmap_write(tscadc->regmap, REG_SE, 0x00); + if (device_for_each_child(dev, NULL, ti_tscadc_can_wakeup)) { + u32 ctrl; + + regmap_read(tscadc->regmap, REG_CTRL, &ctrl); + ctrl &= ~(CNTRLREG_POWERDOWN); + ctrl |= CNTRLREG_TSCSSENB; + regmap_write(tscadc->regmap, REG_CTRL, ctrl); + } pm_runtime_put_sync(dev); return 0;
If a child device like touchscreen is wakeup capable, then keep ADC interface on, so that a touching resistive screen will generate wakeup event to the system. Signed-off-by: Vignesh R <vigneshr@ti.com> --- drivers/mfd/ti_am335x_tscadc.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)