linux-kernel - Re: [PATCH V6 2/3] pinctrl: Add support pin control for UP board CPLD/FPGA

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Message-ID: <CACRpkdbi0bS0yiJ9ac6Z44os0w6FyKm+UsvbgQEYzYKymjww-w@mail.gmail.com>
Date:   Fri, 15 Sep 2023 11:02:01 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     "larry.lai" <larry.lai@...jingtech.com>
Cc:     lee@...nel.org, andriy.shevchenko@...ux.intel.com, pavel@....cz,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-leds@...r.kernel.org, GaryWang@...on.com.tw,
        musa.lin@...jingtech.com, jack.chang@...jingtech.com,
        noah.hung@...jingtech.com
Subject: Re: [PATCH V6 2/3] pinctrl: Add support pin control for UP board CPLD/FPGA

On Fri, Sep 15, 2023 at 5:12 AM larry.lai <larry.lai@...jingtech.com> wrote:

> The UP Squared board <http://www.upboard.com> implements certain
> features (pin control) through an on-board FPGA.
>
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Gary Wang <garywang@...on.com.tw>
> Signed-off-by: larry.lai <larry.lai@...jingtech.com>

This v6 overall looks good to me!
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Can the patch be merged on its own?

> +#include "core.h"
> +#include "intel/pinctrl-intel.h"

Didn't notice this before. But if Andy is OK with it, I'm
OK with it, I guess there is a reason? Perhaps it warrants
a comment explaining why you do this?

Valid reasons:
- You are using Intel-specific HW features also found in this
   FPGA

Invalid reasons:
- Using nifty macros or helpers, then either make them generic
  or (if they are small) duplicate them.

If it was that thing I asked Andy to keep locally because I didn't
agree with its generic usefulness, maybe I should be told to
reconsider.

Yours,
Linus Walleij