58 lines
1.6 KiB
Diff
58 lines
1.6 KiB
Diff
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From: Ondrej Jirman <megous@megous.com>
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Date: Fri, 22 Oct 2021 21:44:13 +0200
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Subject: [PATCH 22/36] media: i2c: imx258: Add support for reset gpio
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It was documented in DT, but not implemented.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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drivers/media/i2c/imx258.c | 14 +++++++++++++-
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1 file changed, 13 insertions(+), 1 deletion(-)
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diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
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index e64fadc..ec6e919 100644
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--- a/drivers/media/i2c/imx258.c
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+++ b/drivers/media/i2c/imx258.c
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@@ -615,6 +615,7 @@ struct imx258 {
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struct v4l2_ctrl *exposure;
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struct gpio_desc *pwdn_gpio;
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+ struct gpio_desc *reset_gpio;
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/* Current mode */
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const struct imx258_mode *cur_mode;
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@@ -1020,7 +1021,11 @@ static int imx258_power_on(struct device *dev)
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if (ret)
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dev_err(dev, "failed to enable clock\n");
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- return ret;
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+ gpiod_set_value_cansleep(imx258->reset_gpio, 0);
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+
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+ usleep_range(400, 500);
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+
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+ return 0;
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}
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static int imx258_power_off(struct device *dev)
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@@ -1030,6 +1035,7 @@ static int imx258_power_off(struct device *dev)
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clk_disable_unprepare(imx258->clk);
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+ gpiod_set_value_cansleep(imx258->reset_gpio, 1);
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gpiod_set_value_cansleep(imx258->pwdn_gpio, 1);
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return 0;
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@@ -1301,6 +1307,12 @@ static int imx258_probe(struct i2c_client *client)
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if (IS_ERR(imx258->pwdn_gpio))
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return PTR_ERR(imx258->pwdn_gpio);
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+ /* request optional reset pin */
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+ imx258->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
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+ GPIOD_OUT_HIGH);
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+ if (IS_ERR(imx258->reset_gpio))
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+ return PTR_ERR(imx258->reset_gpio);
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+
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/* Initialize subdev */
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v4l2_i2c_subdev_init(&imx258->sd, client, &imx258_subdev_ops);
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