4.0-stable review patch. If anyone has any objections, please let me know.
------------------ From: Naidu Tellapati <[email protected]> commit f29b212edb9e253cafcb4a2ab7842a890989f1a5 upstream. 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 <[email protected]> Signed-off-by: Ezequiel Garcia <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/iio/adc/cc10001_adc.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/iio/adc/cc10001_adc.c +++ b/drivers/iio/adc/cc10001_adc.c @@ -100,6 +100,7 @@ static void cc10001_adc_start(struct cc1 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
