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iio: adc: max1027: Reset the device at probe time 

[ Upstream commit db033831b4 ]

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>
5.4-rM2-2.2.x-imx-squashed
Miquel Raynal 2019-10-11 16:43:42 +02:00 committed by Greg Kroah-Hartman
parent a6d47415fc
commit e57ff9fb69
1 changed files with 8 additions and 0 deletions
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8
drivers/iio/adc/max1027.c
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@ -458,6 +458,14 @@ static int max1027_probe(struct spi_device *spi)
return ret;
}
/* 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);