Re: [RFC v2 GPIO lines [was: GPIO User I/O]

[Rodolfo Giometti <giometti@xxxxxxxxxxxx>]

On 26/04/21 11:31, Linus Walleij wrote:
> On Mon, Apr 26, 2021 at 10:44 AM Rodolfo Giometti <giometti@xxxxxxxxxxxx> wrote:
>>
>> On 20/07/20 10:17, Linus Walleij wrote:
>>> IIUC Rodolfo's idea is to provide this with a DT compatible.
>>> The use case will be industrial automation-ish tasks from userspace.
>>>
>>> Currently the only mechanism we have in the device tree to
>>> assign a use for a line is the "gpio-line-names" property,
>>> which creates a name that is reported upward to the character
>>> device.
>>>
>>> Rodolfo's patch is for scripting use cases, assigning some lines
>>> for some cases to be handled by scripts, not the character device.
>>>
>>> What I am a bit worried about is if this would be a Linuxism, as DT
>>> should be OS neutral.
>>
>> Hello Linus,
>>
>> I'm currently using my solution for GPIOs management as input or output lines
>> described in the DT on several systems.
>>
>> Are you re-thinking about this topic? Can we go further for inclusion or should
>> I continue doing out-of-tree? :(
> 
> It is a system description question, and I think you will need to discuss it
> on the devicetree@xxxxxxxxxxxxxxx mailing list.
> 
> The people there are working with things like the system device tree which
> is intended to describe aspects of a system apart from what Linux or
> any operating system is doing with the hardware.

That sounds great to me! :-)

> I would send an RFC of the proposed DT bindings there.

I agree. Please, let me know if you need some help.

Ciao,

Rodolfo

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