Re: [PATCH 1/2] dt-binding: can: mcp2517fd: document device tree bindings

[Martin Sperl <kernel-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org>]

Hi Patrick!


I had a quick look starting to implement gpiolib,

but I believe I would need to implement pin-ctrl on top to

make the Alternate functions work propperly.

I wonder if this effort is really worth it.

Martin

On 11/30/2017 06:49 PM, Patrick Menschel wrote:
> Am 30.11.2017 um 17:58 schriebkernel-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org:
>>> drivers/tty/serial/max310x.c
>>> Documentation/devicetree/bindings/serial/maxim,max310x.txt
>>> Look for "#ifdef CONFIG_GPIOLIB”.
>> This is a gpio-controller, for which this is what I would implement.
>>
> Hi,
>
> you are mistaken about that, max310x chips are spi to uart bridges with
> strong ties to rs485 which is very similar to CAN except for the missing
> arbitration in hardware. Max14830 has GPIOs with clocking support, so
> this chip's driver also fused the main function with secondary gpio
> functions.
> https://datasheets.maximintegrated.com/en/ds/MAX14830.pdf
>
> Anyway I'm curious what is best practice for this sort of configuration.
>
> Regards,
> Patrick
>

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