[PATCH v3 2/2] media: imx335: Fix reset-gpio handling

From: Umang Jain
Date: Wed Jul 31 2024 - 03:03:49 EST


Rectify the logical value of reset-gpio so that it is set to
0 (disabled) during power-on and to 1 (enabled) during power-off.

Meanwhile at it, set the reset-gpio to GPIO_OUT_HIGH at initialization
time to make sure it starts off in reset. Also drop the "Set XCLR"
comment which is not-so-informative.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 45d19b5fb9ae ("media: i2c: Add imx335 camera sensor driver")
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Umang Jain <umang.jain@xxxxxxxxxxxxxxxx>
---
drivers/media/i2c/imx335.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/media/i2c/imx335.c b/drivers/media/i2c/imx335.c
index cd150606a8a9..79b6d60bf6af 100644
--- a/drivers/media/i2c/imx335.c
+++ b/drivers/media/i2c/imx335.c
@@ -1057,7 +1057,7 @@ static int imx335_parse_hw_config(struct imx335 *imx335)

/* Request optional reset pin */
imx335->reset_gpio = devm_gpiod_get_optional(imx335->dev, "reset",
- GPIOD_OUT_LOW);
+ GPIOD_OUT_HIGH);
if (IS_ERR(imx335->reset_gpio)) {
dev_err(imx335->dev, "failed to get reset gpio %ld\n",
PTR_ERR(imx335->reset_gpio));
@@ -1170,8 +1170,7 @@ static int imx335_power_on(struct device *dev)

usleep_range(500, 550); /* Tlow */

- /* Set XCLR */
- gpiod_set_value_cansleep(imx335->reset_gpio, 1);
+ gpiod_set_value_cansleep(imx335->reset_gpio, 0);

ret = clk_prepare_enable(imx335->inclk);
if (ret) {
@@ -1184,7 +1183,7 @@ static int imx335_power_on(struct device *dev)
return 0;

error_reset:
- gpiod_set_value_cansleep(imx335->reset_gpio, 0);
+ gpiod_set_value_cansleep(imx335->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(imx335_supply_name), imx335->supplies);

return ret;
@@ -1201,7 +1200,7 @@ static int imx335_power_off(struct device *dev)
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct imx335 *imx335 = to_imx335(sd);

- gpiod_set_value_cansleep(imx335->reset_gpio, 0);
+ gpiod_set_value_cansleep(imx335->reset_gpio, 1);
clk_disable_unprepare(imx335->inclk);
regulator_bulk_disable(ARRAY_SIZE(imx335_supply_name), imx335->supplies);


--
2.45.0