@@ -698,6 +698,8 @@ 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.
@@ -1231,6 +1233,8 @@ 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) {
@@ -1242,6 +1246,7 @@ 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);
}
@@ -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->powerdown_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 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);