@@ -997,7 +997,7 @@ 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));
@@ -1110,8 +1110,7 @@ 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) {
@@ -1124,7 +1123,7 @@ 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;
@@ -1141,7 +1140,7 @@ 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);
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. 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. The existing usage of imx335 had reset-gpios polarity inverted (GPIO_ACTIVE_HIGH) in their device-tree sources. With this patch included, those DTS will not be able to stream imx335 anymore. The reset-gpio polarity will need to be rectified in the device-tree sources as shown in [1] example, in order to get imx335 functional again (as it remains in reset prior to this fix). Cc: stable@vger.kernel.org Fixes: 45d19b5fb9ae ("media: i2c: Add imx335 camera sensor driver") Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Link: https://lore.kernel.org/linux-media/20240729110437.199428-1-umang.jain@ideasonboard.com/ Signed-off-by: Umang Jain <umang.jain@ideasonboard.com> --- Following conclusions has been observed and discussed [2]: - Original driver was reviewed [3] but, the improper handling of reset-gpios was missed in review. - Commit fea91ee73b7c ("media: i2c: imx335: Enable regulator supplies") shows the driver didn't had regulator enablement support. The driver would have only worked for cases when the supplies were always-on. - Commit 14a60786d72e ("media: imx335: Set reserved register to default value") reflects that the imx335 driver was un-usable due to a reserved register not been set to default. - The original author is no longer using the driver nor it is used for its original purpose any more (confirmed by Sakari Ailus). - It's extremely unlikely the driver has been or continues to be in use on ACPI based systems (comment by Sakari Ailus). The above discussion points in a direction that driver does not cater to a large user-base. Nonetheless, the breakage will be noticed by a few users (if at all) hence, this explanation would help resolve the breakage as soon as noticed (by using correct reset-gpio polarity as mentioned in [1]). [1]: Documentation/devicetree/bindings/media/i2c/sony,imx335.yaml [2]: https://lore.kernel.org/linux-media/20240729110437.199428-1-umang.jain@ideasonboard.com/ [3]: https://lore.kernel.org/all/20210527142145.173-3-martinax.krasteva@linux.intel.com/ --- --- drivers/media/i2c/imx335.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)