media: imx335: Fix reset-gpio handling

[ Upstream commit 99d30e2fdea4086be4e66e2deb10de854b547ab8 ]

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>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/media/i2c/imx335.c b/drivers/media/i2c/imx335.c
index b5f912e0ee08e8b0b2b00c423ebcbc929afa0fc0..2692547791f91abb7af5270d97b5f4d4f5857b30 100644 (file)
--- a/drivers/media/i2c/imx335.c
+++ b/drivers/media/i2c/imx335.c
@@ -792,7 +792,7 @@ 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",
                        PTR_ERR(imx335->reset_gpio));
@@ -898,8 +898,7 @@ 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) {
@@ -912,7 +911,7 @@ 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;
@@ -929,7 +928,7 @@ 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);