gjdwebserver-overlay/sys-kernel/pinephone-pro-sources/files/0026-media-i2c-imx258-Add-support-for-powerdown-gpio.patch

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2022-01-15 02:12:55 +01:00
From: Ondrej Jirman <megous@megous.com>
Date: Fri, 22 Oct 2021 18:10:18 +0200
Subject: [PATCH 20/36] media: i2c: imx258: Add support for powerdown gpio
On some boards powerdown signal needs to be deasserted for this
sensor to be enabled.
Signed-off-by: Ondrej Jirman <megous@megous.com>
---
drivers/media/i2c/imx258.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index c249507..be5adcc 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -612,6 +612,8 @@ struct imx258 {
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *exposure;
+ struct gpio_desc *pwdn_gpio;
+
/* Current mode */
const struct imx258_mode *cur_mode;
@@ -1010,6 +1012,8 @@ static int imx258_power_on(struct device *dev)
struct imx258 *imx258 = to_imx258(sd);
int ret;
+ gpiod_set_value_cansleep(imx258->pwdn_gpio, 0);
+
ret = clk_prepare_enable(imx258->clk);
if (ret)
dev_err(dev, "failed to enable clock\n");
@@ -1024,6 +1028,8 @@ static int imx258_power_off(struct device *dev)
clk_disable_unprepare(imx258->clk);
+ gpiod_set_value_cansleep(imx258->pwdn_gpio, 1);
+
return 0;
}
@@ -1284,6 +1290,12 @@ static int imx258_probe(struct i2c_client *client)
if (ret || val != 180)
return -EINVAL;
+ /* request optional power down pin */
+ imx258->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "powerdown",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(imx258->pwdn_gpio))
+ return PTR_ERR(imx258->pwdn_gpio);
+
/* Initialize subdev */
v4l2_i2c_subdev_init(&imx258->sd, client, &imx258_subdev_ops);