linux-kernel - Re: [PATCH] pinctrl: at91-pio4: add support for fewer lines on last PIO bank

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Message-ID: <CACRpkdYdPp_ihSEHkPaLa0_mcX+8ypnPZ4dn0d-PY9Mes1XntQ@mail.gmail.com>
Date:   Tue, 24 Nov 2020 09:31:36 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Eugen Hristev <eugen.hristev@...rochip.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>
Cc:     inux-arm-kernel@...ts.infradead.org,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: at91-pio4: add support for fewer lines on last
 PIO bank

On Fri, Nov 13, 2020 at 2:25 PM Eugen Hristev
<eugen.hristev@...rochip.com> wrote:

> Some products, like sama7g5, do not have a full last bank of PIO lines.
> In this case for example, sama7g5 only has 8 lines for the PE bank.
> PA0-31, PB0-31, PC0-31, PD0-31, PE0-7, in total 136 lines.
> To cope with this situation, added a data attribute that is product dependent,
> to specify the number of lines of the last bank.
> In case this number is different from the macro ATMEL_PIO_NPINS_PER_BANK,
> adjust the total number of lines accordingly.
> This will avoid advertising 160 lines instead of the actual 136, as this
> product supports, and to avoid reading/writing to invalid register addresses.
>
> Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>

Nico/Ludovic: can you please look at this patch?

Yours,
Linus Walleij