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

Commit Message

Umang Jain July 31, 2024, 7:02 a.m. UTC

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: [e-mail]
Fixes: 45d19b5fb9ae ("media: i2c: Add imx335 camera sensor driver")
Reviewed-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Umang Jain <[e-mail]>
---
 drivers/media/i2c/imx335.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

Comments

Krzysztof Kozlowski July 31, 2024, 7:29 a.m. UTC | #1

On 31/07/2024 09:02, Umang Jain wrote:
> 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.
> 

None of our conclusions are explained, which I requested.

Best regards,
Krzysztof

Patch

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);