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| author | Maxime Ripard <maxime.ripard@bootlin.com> | 2019-01-11 18:32:10 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@bootlin.com> | 2019-01-11 18:32:10 +0300 |
| commit | 23d19ba06b9c5614d6457f5fed349ec8f6d4dac9 (patch) | |
| tree | 39f0b657e5b1b5b958780cae4ae6360f69548d50 /drivers/iio/adc/sc27xx_adc.c | |
| parent | 7d0250ed8e69fb6a66caecf60b8753a21224cc1a (diff) | |
| parent | e3d093070eb0b5e3df668d3eb04100ea79343c65 (diff) | |
| download | linux-23d19ba06b9c5614d6457f5fed349ec8f6d4dac9.tar.xz | |
Merge drm/drm-next into drm-misc-next
drm-next has been forwarded to 5.0-rc1, and we need it to apply the damage
helper for dirtyfb series from Noralf Trønnes.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Diffstat (limited to 'drivers/iio/adc/sc27xx_adc.c')
| -rw-r--r-- | drivers/iio/adc/sc27xx_adc.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/iio/adc/sc27xx_adc.c b/drivers/iio/adc/sc27xx_adc.c index 7940b23dcad9..f7f7a18904b4 100644 --- a/drivers/iio/adc/sc27xx_adc.c +++ b/drivers/iio/adc/sc27xx_adc.c @@ -52,6 +52,9 @@ /* Timeout (ms) for the trylock of hardware spinlocks */ #define SC27XX_ADC_HWLOCK_TIMEOUT 5000 +/* Timeout (ms) for ADC data conversion according to ADC datasheet */ +#define SC27XX_ADC_RDY_TIMEOUT 100 + /* Maximum ADC channel number */ #define SC27XX_ADC_CHANNEL_MAX 32 @@ -223,7 +226,14 @@ static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, if (ret) goto disable_adc; - wait_for_completion(&data->completion); + ret = wait_for_completion_timeout(&data->completion, + msecs_to_jiffies(SC27XX_ADC_RDY_TIMEOUT)); + if (!ret) { + dev_err(data->dev, "read ADC data timeout\n"); + ret = -ETIMEDOUT; + } else { + ret = 0; + } disable_adc: regmap_update_bits(data->regmap, data->base + SC27XX_ADC_CTL, |