[PATCH 22/23] drivers: media: i2c: imx258: Add support for powerdown gpio

git
2024-03-27T23:23:25Z

From: Luigi311 <git@luigi311.com>

On some boards powerdown signal needs to be deasserted for this
sensor to be enabled.

Signed-off-by: Ondrej Jirman <megi@xff.cz>
---
.../devicetree/bindings/media/i2c/sony,imx258.yaml | 4 ++++
drivers/media/i2c/imx258.c | 13 +++++++++++++
2 files changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml b/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml
index c7856de15ba3..0414085bf22f 100644
--- a/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml
@@ -35,6 +35,10 @@ properties:
reg:
maxItems: 1

+ powerdown-gpios:
+ description: |-
+ Reference to the GPIO connected to the PWDN pin, if any.
+
reset-gpios:
description: |-
Reference to the GPIO connected to the XCLR pin, if any.
diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index c559a06bf180..d8c51d5f04e0 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -686,6 +686,8 @@ struct imx258 {
unsigned int lane_mode_idx;
unsigned int csi2_flags;

+ struct gpio_desc *powerdown_gpio;
+
/*
* Mutex for serialized access:
* Protect sensor module set pad format and start/stop streaming safely.
@@ -1220,6 +1222,8 @@ static int imx258_power_on(struct device *dev)
struct imx258 *imx258 = to_imx258(sd);
int ret;

+ gpiod_set_value_cansleep(imx258->powerdown_gpio, 0);
+
ret = regulator_bulk_enable(IMX258_NUM_SUPPLIES,
imx258->supplies);
if (ret) {
@@ -1231,6 +1235,7 @@ static int imx258_power_on(struct device *dev)
ret = clk_prepare_enable(imx258->clk);
if (ret) {
dev_err(dev, "failed to enable clock\n");
+ gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
}

@@ -1245,6 +1250,8 @@ 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->powerdown_gpio, 1);
+
return 0;
}

@@ -1548,6 +1555,12 @@ static int imx258_probe(struct i2c_client *client)
if (!imx258->variant_cfg)
imx258->variant_cfg = &imx258_cfg;

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

--
2.42.0