diff options
| -rw-r--r-- | drivers/iio/resolver/ad2s1210.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/iio/resolver/ad2s1210.c b/drivers/iio/resolver/ad2s1210.c index 8646389ec88d..a414eef12e5e 100644 --- a/drivers/iio/resolver/ad2s1210.c +++ b/drivers/iio/resolver/ad2s1210.c @@ -1426,6 +1426,7 @@ static int ad2s1210_setup_gpios(struct ad2s1210_state *st) { struct device *dev = &st->sdev->dev; struct gpio_descs *resolution_gpios; + struct gpio_desc *reset_gpio; DECLARE_BITMAP(bitmap, 2); int ret; @@ -1481,6 +1482,17 @@ static int ad2s1210_setup_gpios(struct ad2s1210_state *st) "failed to set resolution gpios\n"); } + /* If the optional reset GPIO is present, toggle it to do a hard reset. */ + reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(reset_gpio)) + return dev_err_probe(dev, PTR_ERR(reset_gpio), + "failed to request reset GPIO\n"); + + if (reset_gpio) { + udelay(10); + gpiod_set_value(reset_gpio, 0); + } + return 0; } |