From: Ondrej Jirman <megi@xxxxxx>
It was documented in DT, but not implemented.
Signed-off-by: Ondrej Jirman <megous@xxxxxxxxxx>
Signed-off-by: Luis Garcia <git@xxxxxxxxxxxx>
Reviewed-by: Pavel Machek <pavel@xxxxxx>
Reviewed-by: Tommaso Merciai <tomm.merciai@xxxxxxxxx>
---
drivers/media/i2c/imx258.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index f043200e336e..671fe176c64c 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -698,6 +698,8 @@ struct imx258 {
unsigned int lane_mode_idx;
unsigned int csi2_flags;
+ struct gpio_desc *reset_gpio;
+
/*
* Mutex for serialized access:
* Protect sensor module set pad format and start/stop streaming safely.
@@ -1245,7 +1247,10 @@ 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)
@@ -1254,6 +1259,9 @@ static int imx258_power_off(struct device *dev)
struct imx258 *imx258 = to_imx258(sd);
clk_disable_unprepare(imx258->clk);
+
+ gpiod_set_value_cansleep(imx258->reset_gpio, 1);
+
regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
return 0;
@@ -1559,6 +1567,12 @@ static int imx258_probe(struct i2c_client *client)
if (!imx258->variant_cfg)
imx258->variant_cfg = &imx258_cfg;
+ /* 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);
--
2.44.0
