Re: [PATCH 4/5] iio: adc: ti_am335x_adc: Disable ADC during suspend unconditionally

On Saturday 30 June 2018 08:48 PM, Jonathan Cameron wrote:

On Sat, 30 Jun 2018 16:03:17 +0530
Vignesh R [off-list ref] wrote:

quoted

Parent MFD device takes care of enabling ADC interface whenever
touchscreen is marked wakeup capable. Therefore, unconditionally disable
ADC interface during system suspend to save power in case of system with
just ADC and no TSC.

Signed-off-by: Vignesh R <vigneshr@ti.com>

This sounds like a sensible change to me.   Is it applicable without the
rest of the series?  If so I'll take it through IIO.  If the answer
is that it needs to go with the rest then

This patch as such does not have any compile time dependencies on other
patches, but I would like Dmitry's opinion on the series before being
merged.

Acked-by: Jonathan Cameron <redacted>

Thanks!


Regards
Vignesh

Thanks,

Jonathan

quoted

---
 drivers/iio/adc/ti_am335x_adc.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 80df5a377d30..cafb1dcadc48 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c

@@ -693,16 +693,12 @@ static int __maybe_unused tiadc_suspend(struct device *dev)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct tiadc_device *adc_dev = iio_priv(indio_dev);
-	struct ti_tscadc_dev *tscadc_dev;
 	unsigned int idle;
 
-	tscadc_dev = ti_tscadc_dev_get(to_platform_device(dev));
-	if (!device_may_wakeup(tscadc_dev->dev)) {
-		idle = tiadc_readl(adc_dev, REG_CTRL);
-		idle &= ~(CNTRLREG_TSCSSENB);
-		tiadc_writel(adc_dev, REG_CTRL, (idle |
-				CNTRLREG_POWERDOWN));
-	}
+	idle = tiadc_readl(adc_dev, REG_CTRL);
+	idle &= ~(CNTRLREG_TSCSSENB);
+	tiadc_writel(adc_dev, REG_CTRL, (idle |
+			CNTRLREG_POWERDOWN));
 
 	return 0;
 }

-- 
Regards
Vignesh