diff mbox series

[v4,23/25] media: i2c: imx258: Add support for reset gpio

Message ID 20240414203503.18402-24-git@luigi311.com (mailing list archive)
State New, archived
Headers show
Series imx258 improvement series | expand

Commit Message

Luis Garcia April 14, 2024, 8:35 p.m. UTC 
From: Luis Garcia <git@luigi311.com>

It was documented in DT, but not implemented.

Signed-off-by: Ondrej Jirman <megous@megous.com>
Signed-off-by: Luis Garcia <git@luigi311.com>
---
 drivers/media/i2c/imx258.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

Comments

Tommaso Merciai April 15, 2024, 4 p.m. UTC | #1 
Hi Luis,

On Sun, Apr 14, 2024 at 02:35:01PM -0600, git@luigi311.com wrote:
> From: Luis Garcia <git@luigi311.com>
> 
> It was documented in DT, but not implemented.

Good catch :-)

> 
> Signed-off-by: Ondrej Jirman <megous@megous.com>
> Signed-off-by: Luis Garcia <git@luigi311.com>
> ---
>  drivers/media/i2c/imx258.c | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
> index f0bd72f241e4..5de71cb7c1ae 100644
> --- a/drivers/media/i2c/imx258.c
> +++ b/drivers/media/i2c/imx258.c
> @@ -699,6 +699,7 @@ struct imx258 {
>  	unsigned int csi2_flags;
>  
>  	struct gpio_desc *powerdown_gpio;
> +	struct gpio_desc *reset_gpio;
>  
>  	/*
>  	 * Mutex for serialized access:
> @@ -1250,7 +1251,11 @@ 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);
> +

I think you can remove this new line here.

> +	usleep_range(400, 500);
> +
> +	return 0;
>  }
>  
>  static int imx258_power_off(struct device *dev)
> @@ -1260,6 +1265,7 @@ static int imx258_power_off(struct device *dev)
>  
>  	clk_disable_unprepare(imx258->clk);
>  
> +	gpiod_set_value_cansleep(imx258->reset_gpio, 1);
>  	gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
>  
>  	regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
> @@ -1573,6 +1579,12 @@ static int imx258_probe(struct i2c_client *client)
>  	if (IS_ERR(imx258->powerdown_gpio))
>  		return PTR_ERR(imx258->powerdown_gpio);
>  
> +	/* 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);
>  

Looks good to me.
Reviewed-by: Tommaso Merciai <tomm.merciai@gmail.com>

> -- 
> 2.44.0
> 
>
Luis Garcia April 15, 2024, 4:25 p.m. UTC | #2 
On 4/15/24 10:00, Tommaso Merciai wrote:
> Hi Luis,
> 
> On Sun, Apr 14, 2024 at 02:35:01PM -0600, git@luigi311.com wrote:
>> From: Luis Garcia <git@luigi311.com>
>>
>> It was documented in DT, but not implemented.
> 
> Good catch :-)
> 
>>
>> Signed-off-by: Ondrej Jirman <megous@megous.com>
>> Signed-off-by: Luis Garcia <git@luigi311.com>
>> ---
>>  drivers/media/i2c/imx258.c | 14 +++++++++++++-
>>  1 file changed, 13 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
>> index f0bd72f241e4..5de71cb7c1ae 100644
>> --- a/drivers/media/i2c/imx258.c
>> +++ b/drivers/media/i2c/imx258.c
>> @@ -699,6 +699,7 @@ struct imx258 {
>>  	unsigned int csi2_flags;
>>  
>>  	struct gpio_desc *powerdown_gpio;
>> +	struct gpio_desc *reset_gpio;
>>  
>>  	/*
>>  	 * Mutex for serialized access:
>> @@ -1250,7 +1251,11 @@ 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);
>> +
> 
> I think you can remove this new line here.
> 

Done

>> +	usleep_range(400, 500);
>> +
>> +	return 0;
>>  }
>>  
>>  static int imx258_power_off(struct device *dev)
>> @@ -1260,6 +1265,7 @@ static int imx258_power_off(struct device *dev)
>>  
>>  	clk_disable_unprepare(imx258->clk);
>>  
>> +	gpiod_set_value_cansleep(imx258->reset_gpio, 1);
>>  	gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
>>  
>>  	regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
>> @@ -1573,6 +1579,12 @@ static int imx258_probe(struct i2c_client *client)
>>  	if (IS_ERR(imx258->powerdown_gpio))
>>  		return PTR_ERR(imx258->powerdown_gpio);
>>  
>> +	/* 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);
>>  
> 
> Looks good to me.
> Reviewed-by: Tommaso Merciai <tomm.merciai@gmail.com>
>

Thanks!
 
>> -- 
>> 2.44.0
>>
>>
diff mbox series

Patch

diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index f0bd72f241e4..5de71cb7c1ae 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -699,6 +699,7 @@  struct imx258 {
 	unsigned int csi2_flags;
 
 	struct gpio_desc *powerdown_gpio;
+	struct gpio_desc *reset_gpio;
 
 	/*
 	 * Mutex for serialized access:
@@ -1250,7 +1251,11 @@  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)
@@ -1260,6 +1265,7 @@  static int imx258_power_off(struct device *dev)
 
 	clk_disable_unprepare(imx258->clk);
 
+	gpiod_set_value_cansleep(imx258->reset_gpio, 1);
 	gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
 
 	regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
@@ -1573,6 +1579,12 @@  static int imx258_probe(struct i2c_client *client)
 	if (IS_ERR(imx258->powerdown_gpio))
 		return PTR_ERR(imx258->powerdown_gpio);
 
+	/* 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);