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| author |   Naidu Tellapati <naidu.tellapati@imgtec.com> | 2015-05-07 18:22:20 -0300 |
|---|---|---|
| committer |   Jonathan Cameron <jic23@kernel.org> | 2015-05-12 20:01:13 +0100 |
| commit | f29b212edb9e253cafcb4a2ab7842a890989f1a5 (patch) | |
| tree | 7bd4b5e971fab715aa243bff5eb648dbb6f9fe29 /drivers/iio/adc/cc10001_adc.c | |
| parent | iio: adc: cc10001: Fix regulator_get_voltage() return value check (diff) | |
| download | linux-dev-f29b212edb9e253cafcb4a2ab7842a890989f1a5.tar.xz linux-dev-f29b212edb9e253cafcb4a2ab7842a890989f1a5.zip | |
iio: adc: cc10001: Add delay before setting START bit
According to hardware team there should be some delay after
setting channel number, start mode and before setting START.
Add a one microsecond delay for this purpose.
Fixes: 1664f6a5b0c8 ("iio: adc: Cosmic Circuits 10001 ADC driver")
Signed-off-by: Naidu Tellapati <naidu.tellapati@imgtec.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/adc/cc10001_adc.c')
| -rw-r--r-- | drivers/iio/adc/cc10001_adc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iio/adc/cc10001_adc.c b/drivers/iio/adc/cc10001_adc.c index fb7c5d2cc61a..115f6e99a7fa 100644 --- a/drivers/iio/adc/cc10001_adc.c +++ b/drivers/iio/adc/cc10001_adc.c @@ -100,6 +100,7 @@ static void cc10001_adc_start(struct cc10001_adc_device *adc_dev, val = (channel & CC10001_ADC_CH_MASK) | CC10001_ADC_MODE_SINGLE_CONV; cc10001_adc_write_reg(adc_dev, CC10001_ADC_CONFIG, val); + udelay(1); val = cc10001_adc_read_reg(adc_dev, CC10001_ADC_CONFIG); val = val | CC10001_ADC_START_CONV; cc10001_adc_write_reg(adc_dev, CC10001_ADC_CONFIG, val); |