[PATCH v3 24/25] drivers: media: i2c: imx258: Add support for reset gpio

git
2024-04-03T15:14:26Z

From: Luis Garcia <git@luigi311.com>

It was documented in DT, but not implemented.

Signed-off-by: Ondrej Jirman <megous@megous.com>
Signed-off-by: Luis Garcia <git@luigi311.com>
---
drivers/media/i2c/imx258.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index 163f04f6f954..4c117c4829f1 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -680,6 +680,7 @@ struct imx258 {
unsigned int csi2_flags;

struct gpio_desc *powerdown_gpio;
+ struct gpio_desc *reset_gpio;

/*
* Mutex for serialized access:
@@ -1232,7 +1233,11 @@ static int imx258_power_on(struct device *dev)
regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
}

- return ret;
+ gpiod_set_value_cansleep(imx258->reset_gpio, 0);
+
+ usleep_range(400, 500);
+
+ return 0;
}

static int imx258_power_off(struct device *dev)
@@ -1243,6 +1248,7 @@ static int imx258_power_off(struct device *dev)
clk_disable_unprepare(imx258->clk);
regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);

+ gpiod_set_value_cansleep(imx258->reset_gpio, 1);
gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);

return 0;
@@ -1554,6 +1560,12 @@ static int imx258_probe(struct i2c_client *client)
if (IS_ERR(imx258->powerdown_gpio))
return PTR_ERR(imx258->powerdown_gpio);

+ /* request optional reset pin */
+ imx258->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(imx258->reset_gpio))
+ return PTR_ERR(imx258->reset_gpio);
+
/* Initialize subdev */
v4l2_i2c_subdev_init(&imx258->sd, client, &imx258_subdev_ops);

--
2.42.0