From: Miquel Raynal miquel.raynal@bootlin.com
[ Upstream commit db033831b4f5589f9fcbadb837614a7c4eac0308 ]
All the registers are configured by the driver, let's reset the chip at probe time, avoiding any conflict with a possible earlier configuration.
Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/adc/max1027.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c index 712fbd2b1f16..ec3f7bc70b75 100644 --- a/drivers/iio/adc/max1027.c +++ b/drivers/iio/adc/max1027.c @@ -471,6 +471,14 @@ static int max1027_probe(struct spi_device *spi) goto fail_dev_register; }
+ /* Internal reset */ + st->reg = MAX1027_RST_REG; + ret = spi_write(st->spi, &st->reg, 1); + if (ret < 0) { + dev_err(&indio_dev->dev, "Failed to reset the ADC\n"); + return ret; + } + /* Disable averaging */ st->reg = MAX1027_AVG_REG; ret = spi_write(st->spi, &st->reg, 1);