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

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Date:   Tue, 31 Oct 2023 10:16:57 +0800
From:   larry <larry.lai@...jingtech.com>
To:     Linus Walleij <linus.walleij@...aro.org>
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

Hi Linus,

	Cause we replied the wrong email-format to you last time.(Lee informed
us that format is hard to read), so we send the comment again, thanks.

On 15/9/2023 17:02, Linus Walleij wrote:
> 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?
Need struct intel_pinctrl gpp information to control dedicated Raspberry
Pi compatible GPIOs.
These products (Up boards) are Intel approves foundation kits.

> 
> 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