diff mbox series

[v3,24/25] drivers: media: i2c: imx258: Add support for reset gpio

Message ID 20240403150355.189229-25-git@luigi311.com (mailing list archive)
State New
Headers show
Series imx258 improvement series | expand

Commit Message

Luis Garcia April 3, 2024, 3:03 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

Sakari Ailus April 3, 2024, 4:28 p.m. UTC | #1 
Hi Luis,

Could you unify the subject prefix for the driver patches, please? E.g.
"media: imx258: " would be fine.

On Wed, Apr 03, 2024 at 09:03:53AM -0600, git@luigi311.com wrote:
> 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(-)
> 
> diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
> index 163f04f6f954..4c117c4829f1 100644
> --- a/drivers/media/i2c/imx258.c
> +++ b/drivers/media/i2c/imx258.c
> @@ -680,6 +680,7 @@ struct imx258 {
>  	unsigned int csi2_flags;
>  
>  	struct gpio_desc *powerdown_gpio;
> +	struct gpio_desc *reset_gpio;
>  
>  	/*
>  	 * Mutex for serialized access:
> @@ -1232,7 +1233,11 @@ 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);

You could mention this at least in the commit message.

> +
> +	return 0;
>  }
>  
>  static int imx258_power_off(struct device *dev)
> @@ -1243,6 +1248,7 @@ static int imx258_power_off(struct device *dev)
>  	clk_disable_unprepare(imx258->clk);
>  	regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
>  
> +	gpiod_set_value_cansleep(imx258->reset_gpio, 1);

Same question than on the other GPIO: does this belong here?

>  	gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
>  
>  	return 0;
> @@ -1554,6 +1560,12 @@ 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);
>
Ondřej Jirman April 3, 2024, 5:03 p.m. UTC | #2 
Hi,

On Wed, Apr 03, 2024 at 04:28:59PM GMT, Sakari Ailus wrote:
> Hi Luis,
> 
> Could you unify the subject prefix for the driver patches, please? E.g.
> "media: imx258: " would be fine.
> 
> On Wed, Apr 03, 2024 at 09:03:53AM -0600, git@luigi311.com wrote:
> > 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(-)
> > 
> > diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
> > index 163f04f6f954..4c117c4829f1 100644
> > --- a/drivers/media/i2c/imx258.c
> > +++ b/drivers/media/i2c/imx258.c
> > @@ -680,6 +680,7 @@ struct imx258 {
> >  	unsigned int csi2_flags;
> >  
> >  	struct gpio_desc *powerdown_gpio;
> > +	struct gpio_desc *reset_gpio;
> >  
> >  	/*
> >  	 * Mutex for serialized access:
> > @@ -1232,7 +1233,11 @@ 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);
> 
> You could mention this at least in the commit message.

This is T6 in the datasheet: https://megous.com/dl/tmp/92c9223ce877216e.png


> > +
> > +	return 0;
> >  }
> >  
> >  static int imx258_power_off(struct device *dev)
> > @@ -1243,6 +1248,7 @@ static int imx258_power_off(struct device *dev)
> >  	clk_disable_unprepare(imx258->clk);
> >  	regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
> >  
> > +	gpiod_set_value_cansleep(imx258->reset_gpio, 1);
> 
> Same question than on the other GPIO: does this belong here?

No, this should be before the regulator_bulk_disable.

See: https://megous.com/dl/tmp/c96180b23d7ce63a.png

kind regards,
	o.

> >  	gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
> >  
> >  	return 0;
> > @@ -1554,6 +1560,12 @@ 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);
> >  
> 
> -- 
> Regards,
> 
> Sakari Ailus
Luis Garcia April 3, 2024, 7:48 p.m. UTC | #3 
On 4/3/24 11:03, Ondřej Jirman wrote:
> Hi,
> 
> On Wed, Apr 03, 2024 at 04:28:59PM GMT, Sakari Ailus wrote:
>> Hi Luis,
>>
>> Could you unify the subject prefix for the driver patches, please? E.g.
>> "media: imx258: " would be fine.
>>
>> On Wed, Apr 03, 2024 at 09:03:53AM -0600, git@luigi311.com wrote:
>>> 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(-)
>>>
>>> diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
>>> index 163f04f6f954..4c117c4829f1 100644
>>> --- a/drivers/media/i2c/imx258.c
>>> +++ b/drivers/media/i2c/imx258.c
>>> @@ -680,6 +680,7 @@ struct imx258 {
>>>  	unsigned int csi2_flags;
>>>  
>>>  	struct gpio_desc *powerdown_gpio;
>>> +	struct gpio_desc *reset_gpio;
>>>  
>>>  	/*
>>>  	 * Mutex for serialized access:
>>> @@ -1232,7 +1233,11 @@ 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);
>>
>> You could mention this at least in the commit message.
> 
> This is T6 in the datasheet: https://megous.com/dl/tmp/92c9223ce877216e.png
> 
> 
>>> +
>>> +	return 0;
>>>  }
>>>  
>>>  static int imx258_power_off(struct device *dev)
>>> @@ -1243,6 +1248,7 @@ static int imx258_power_off(struct device *dev)
>>>  	clk_disable_unprepare(imx258->clk);
>>>  	regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
>>>  
>>> +	gpiod_set_value_cansleep(imx258->reset_gpio, 1);
>>
>> Same question than on the other GPIO: does this belong here?
> 
> No, this should be before the regulator_bulk_disable.
> 
> See: https://megous.com/dl/tmp/c96180b23d7ce63a.png
> 
> kind regards,
> 	o.
> 

Since I'm supposed to move the reset up should I also
move the power up with it to match your downstream
driver?

>>>  	gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
>>>  
>>>  	return 0;
>>> @@ -1554,6 +1560,12 @@ 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);
>>>  
>>
>> -- 
>> Regards,
>>
>> Sakari Ailus
diff mbox series

Patch

diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index 163f04f6f954..4c117c4829f1 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -680,6 +680,7 @@  struct imx258 {
 	unsigned int csi2_flags;
 
 	struct gpio_desc *powerdown_gpio;
+	struct gpio_desc *reset_gpio;
 
 	/*
 	 * Mutex for serialized access:
@@ -1232,7 +1233,11 @@  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)
@@ -1243,6 +1248,7 @@  static int imx258_power_off(struct device *dev)
 	clk_disable_unprepare(imx258->clk);
 	regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies);
 
+	gpiod_set_value_cansleep(imx258->reset_gpio, 1);
 	gpiod_set_value_cansleep(imx258->powerdown_gpio, 1);
 
 	return 0;
@@ -1554,6 +1560,12 @@  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);