Re: [PATCH 1/3] dt-bindings: net: can: m_can: Add Documentation for stb-gpios

[Faiz Abbas]

Hi,

On 22/01/20 8:04 pm, Dan Murphy wrote:
> Sekhar
> 
> On 1/22/20 8:24 AM, Sekhar Nori wrote:
>> On 22/01/20 7:05 PM, Dan Murphy wrote:
>>> Faiz
>>>
>>> On 1/22/20 2:03 AM, Faiz Abbas wrote:
>>>> The CAN transceiver on some boards has an STB pin which is
>>>> used to control its standby mode. Add an optional property
>>>> stb-gpios to toggle the same.
>>>>
>>>> Signed-off-by: Faiz Abbas <faiz_abbas@xxxxxx>
>>>> Signed-off-by: Sekhar Nori <nsekhar@xxxxxx>
>>>> ---
>>>> ÂÂ Documentation/devicetree/bindings/net/can/m_can.txt | 2 ++
>>>> ÂÂ 1 file changed, 2 insertions(+)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/net/can/m_can.txt
>>>> b/Documentation/devicetree/bindings/net/can/m_can.txt
>>>> index ed614383af9c..cc8ba3f7a2aa 100644
>>>> --- a/Documentation/devicetree/bindings/net/can/m_can.txt
>>>> +++ b/Documentation/devicetree/bindings/net/can/m_can.txt
>>>> @@ -48,6 +48,8 @@ Optional Subnode:
>>>> ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ that can be used for CAN/CAN-FD modes. See
>>>> ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
>>>> Documentation/devicetree/bindings/net/can/can-transceiver.txt
>>>> ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ for details.
>>>> +stb-gpiosÂÂÂÂÂÂÂ : gpio node to toggle the STB (standby) signal on
>>>> the transceiver
>>>> +
>>> The m_can.txt is for the m_can framework. If this is specific to the
>>> platform then it really does not belong here.
>>>
>>> If the platform has specific nodes then maybe we need a
>>> m_can_platform.txt binding for specific platform nodes. But I leave
>>> that decision to Rob.
>> Since this is transceiver enable, should this not be in
>> Documentation/devicetree/bindings/net/can/can-transceiver.txt?
> 

The transceiver node is just a node without an associated device. I had
tried to convert it to a phy implementation but that idea got shot down
here:

https://lore.kernel.org/patchwork/patch/1006238/

Thanks,
Faiz