RE: [PATCH v1 2/3] gpio: Add support for TPS68470 GPIOs

["Mani, Rajmohan" <rajmohan.mani@xxxxxxxxx>]

Hi Andy, Sakari,

> Subject: Re: [PATCH v1 2/3] gpio: Add support for TPS68470 GPIOs
> 
> On Sun, Jun 11, 2017 at 7:50 PM, Sakari Ailus <sakari.ailus@xxxxxx> wrote:
> > On Sun, Jun 11, 2017 at 04:40:16PM +0300, Andy Shevchenko wrote:
> >> On Sun, Jun 11, 2017 at 2:30 PM, Sakari Ailus <sakari.ailus@xxxxxx> wrote:
> 
> >> > Again, I'm not really worried about this driver, but the ACPI
> >> > tables. How does the difference show there?
> >>
> >> Same way. You will have common numbering over the chip [0, 9]. It
> >> will be just an abstraction inside the driver.
> >
> > Oh, in that case that should be a non-issue.
> 
> >> Above states the opposite, so, it's clear to me that abstraction of 2
> >> GPIO chips over 1 can be utilized here.
> >
> > Sounds fine to me, taken that this does not add complications to ACPI
> > tables.
> 
> They just need to share the same ACPI_HANDLE (it might require to do this in
> generic way in gpiolib) and have a continuous numbering (easy to achieve with
> carefully chosen bases).
> 

Few clarifications...

Are you implying new kernel changes are needed in gpiolib to accommodate 2 GPIO chips?
Does it need changes in platform firmware or is it expected to work just with the gpiolib changes that you described above?

Thanks
Raj
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