[PATCH 13/15] iio: ti_am335x_adc: Fix capture operation during resume

[Zubair Lutfullah]

From: Russ Dill <Russ.Dill@xxxxxx>

The ADC needs to go through a proper initialization sequence after
resuming from suspend.

Signed-off-by: Russ Dill <Russ.Dill@xxxxxx>
Signed-off-by: Zubair Lutfullah <zubair.lutfullah@xxxxxxxxx>
---
 drivers/iio/adc/ti_am335x_adc.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 44b7181..265ed27 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -552,11 +552,14 @@ static int tiadc_resume(struct device *dev)
 	struct tiadc_device *adc_dev = iio_priv(indio_dev);
 	unsigned int restore;
 
+	restore = tiadc_readl(adc_dev, REG_CTRL);
+	restore &= ~(CNTRLREG_TSCSSENB);
+	tiadc_writel(adc_dev, REG_CTRL, restore);
 	tiadc_writel(adc_dev, REG_FIFO1THR, FIFO1_THRESHOLD);
 	tiadc_step_config(adc_dev, adc_dev->is_continuous_mode);
 	/* Make sure ADC is powered up */
-	restore = tiadc_readl(adc_dev, REG_CTRL);
 	restore &= ~(CNTRLREG_POWERDOWN);
+	restore |= CNTRLREG_TSCSSENB;
 	tiadc_writel(adc_dev, REG_CTRL, restore);
 
 	return 0;
-- 
1.7.9.5

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