iio: potentiometer: ad5272: Correct polarity of reset

The driver should assert reset by setting the gpio high, and
then release it by setting it the gpio low. This allows the
device tree (or other hardware definition) to specify how the
gpio is configured.

For example as open drain or push-pull depending on the
connected hardware.

Signed-off-by: Phil Reid <preid@electromag.com.au>
Link: https://lore.kernel.org/r/20201124050014.4453-1-preid@electromag.com.au
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/potentiometer/ad5272.c b/drivers/iio/potentiometer/ad5272.c
index 70c45d346df08efd99efa40c721ce2fc7303ec33..d8cbd170262f8bde9591e68db97eb142367daea6 100644 (file)
--- a/drivers/iio/potentiometer/ad5272.c
+++ b/drivers/iio/potentiometer/ad5272.c
@@ -143,13 +143,13 @@ static int ad5272_reset(struct ad5272_data *data)
        struct gpio_desc *reset_gpio;
 
        reset_gpio = devm_gpiod_get_optional(&data->client->dev, "reset",
-               GPIOD_OUT_LOW);
+               GPIOD_OUT_HIGH);
        if (IS_ERR(reset_gpio))
                return PTR_ERR(reset_gpio);
 
        if (reset_gpio) {
                udelay(1);
-               gpiod_set_value(reset_gpio, 1);
+               gpiod_set_value(reset_gpio, 0);
        } else {
                ad5272_write(data, AD5272_RESET, 0);
        }