Re: [PATCH] pinctrl: msm: Add support for MSM TLMM pinmux

[Hanumant Singh]

On 7/30/2013 2:22 PM, Stephen Warren wrote:
> On 07/30/2013 03:10 PM, hanumant wrote:
> ...
> > We actually have the same TLMM pinmux used by several socs of a family.
> > The number of pins on each soc may vary.
> > Also a given soc gets used in a number of boards.
> > The device tree for a given soc is split into the different boards that
> > its in ie the boards inherit a common soc.dtsi but have separate dts.
> > The boards for the same soc may use different pin groups for
> > accomplishing a function, since we have multiple i2c, spi uart etc
> > peripheral instances on a soc. A different instance of each of the above
> > peripherals, can be used in different boards, utilizing different
> > or subset of same pin groups.
> > Thus I would need to have multiple C files for one soc, based on the
> > boards that it goes into.
>
> The pinctrl driver should be exposing the raw capabilities of the HW.
> All the board-specific configuration should be expressed in DT. So, the
> driver shouldn't have to know anything about different boards at
> compile-time.
I agree, so I wanted to keep the pin grouping information in DT, we 
already have a board based differentiation of dts files in DT, for the 
same soc.

Thanks
Hanumant

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