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media: imx335: Fix reset-gpio handling

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[ 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: 45d19b5fb9 ("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>
This commit is contained in:
Umang Jain
2024-08-30 11:41:52 +05:30
committed by Greg Kroah-Hartman
parent 1f66f02929
commit fb4c3e7120
1 changed files with 4 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/media/i2c/imx335.c
View File

@@ -792,7 +792,7 @@ static int imx335_parse_hw_config(struct imx335 *imx335)
/* Request optional reset pin */ /* Request optional reset pin */
imx335->reset_gpio = devm_gpiod_get_optional(imx335->dev, "reset", imx335->reset_gpio = devm_gpiod_get_optional(imx335->dev, "reset",
GPIOD_OUT_LOW); GPIOD_OUT_HIGH);
if (IS_ERR(imx335->reset_gpio)) { if (IS_ERR(imx335->reset_gpio)) {
dev_err(imx335->dev, "failed to get reset gpio %ld", dev_err(imx335->dev, "failed to get reset gpio %ld",
PTR_ERR(imx335->reset_gpio)); PTR_ERR(imx335->reset_gpio));
@@ -898,8 +898,7 @@ static int imx335_power_on(struct device *dev)
usleep_range(500, 550); /* Tlow */ usleep_range(500, 550); /* Tlow */
/* Set XCLR */ gpiod_set_value_cansleep(imx335->reset_gpio, 0);
gpiod_set_value_cansleep(imx335->reset_gpio, 1);
ret = clk_prepare_enable(imx335->inclk); ret = clk_prepare_enable(imx335->inclk);
if (ret) { if (ret) {
@@ -912,7 +911,7 @@ static int imx335_power_on(struct device *dev)
return 0; return 0;
error_reset: 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); regulator_bulk_disable(ARRAY_SIZE(imx335_supply_name), imx335->supplies);
return ret; return ret;
@@ -929,7 +928,7 @@ static int imx335_power_off(struct device *dev)
struct v4l2_subdev *sd = dev_get_drvdata(dev); struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct imx335 *imx335 = to_imx335(sd); 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); clk_disable_unprepare(imx335->inclk);
regulator_bulk_disable(ARRAY_SIZE(imx335_supply_name), imx335->supplies); regulator_bulk_disable(ARRAY_SIZE(imx335_supply_name), imx335->supplies);