linux-kernel - Re: [PATCH v4 3/4] dt-bindings: media: imx274: Move clock and supplies to required properties

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Date:   Mon, 31 Aug 2020 13:41:02 -0700
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     Sakari Ailus <sakari.ailus@....fi>
CC:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <hverkuil@...all.nl>, <luca@...aceresoli.net>,
        <leonl@...pardimaging.com>, <robh+dt@...nel.org>,
        <lgirdwood@...il.com>, <broonie@...nel.org>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 3/4] dt-bindings: media: imx274: Move clock and
 supplies to required properties


On 8/31/20 1:37 PM, Sowjanya Komatineni wrote:
>
> On 8/31/20 1:17 PM, Sakari Ailus wrote:
>> Hi Sowjanya,
>>
>> On Mon, Aug 31, 2020 at 12:52:37PM -0700, Sowjanya Komatineni wrote:
>>> Clock and supplies are external to IMX274 sensor and are dependent
>>> on camera module design.
>>>
>>> So, this patch moves them to required properties.
>>>
>>> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
>>> ---
>>>   Documentation/devicetree/bindings/media/i2c/imx274.txt | 6 +++---
>>>   1 file changed, 3 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/media/i2c/imx274.txt 
>>> b/Documentation/devicetree/bindings/media/i2c/imx274.txt
>>> index d0a5c899..b43bed6 100644
>>> --- a/Documentation/devicetree/bindings/media/i2c/imx274.txt
>>> +++ b/Documentation/devicetree/bindings/media/i2c/imx274.txt
>>> @@ -10,15 +10,15 @@ at 1440 Mbps.
>>>   Required Properties:
>>>   - compatible: value should be "sony,imx274" for imx274 sensor
>>>   - reg: I2C bus address of the device
>>> -
>>> -Optional Properties:
>>> -- reset-gpios: Sensor reset GPIO
>>>   - clocks: Reference to the input clock.
>>>   - clock-names: Should be "inck".
>>>   - vana-supply: Sensor 2.8v analog supply.
>>>   - vdig-supply: Sensor 1.8v digital core supply.
>>>   - vddl-supply: Sensor digital IO 1.2v supply.
>> If these have been optional in the past I don't think we can start
>> requiring them now.
>>
>> The framework will just give the driver a dummy regulator if one isn't
>> found.
> These were added recently with my patches. So I hope should be ok to 
> make them required as they are external to sensor

Also made them required as they are external to sensor and also to use 
bulk_enable/disable APIs, devm_regulator_bulk_get()

does not use OPTIONAL_GET.

>>
>>>   +Optional Properties:
>>> +- reset-gpios: Sensor reset GPIO
>>> +
>>>   The imx274 device node should contain one 'port' child node with
>>>   an 'endpoint' subnode. For further reading on port node refer to
>>> Documentation/devicetree/bindings/media/video-interfaces.txt.