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 | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 1f42e0a..40eec84 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -588,12 +588,16 @@ 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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