linux-kernel - Re: [PATCH 1/2] pinctrl: ingenic: Get rid of repetitive data

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Message-ID: <CACRpkdaZKxGBXXAXUd-gho4bnCRN+9HhX6OEsUG982xSDQgRFw@mail.gmail.com>
Date:   Fri, 6 Nov 2020 14:44:05 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Zhou Yanjie <zhouyanjie@...yeetech.com>, od@...c.me,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] pinctrl: ingenic: Get rid of repetitive data

On Sun, Nov 1, 2020 at 10:01 AM Paul Cercueil <paul@...pouillou.net> wrote:

> Abuse the pin function pointer to store the pin function value directly,
> when all the pins of a group have the same function value. Now when the
> pointer value is <= 3 (unsigned), the pointer value is used as the pin
> function; otherwise it is used as a regular pointer.
>
> This drastically reduces the number of pin function tables needed, and
> drops .data usage by about 2 KiB. Additionally, the few pin function
> tables that are still around now contain u8 instead of int, since the
> largest number that will be stored is 3.
>
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>

Both patches applied.

Yours,
Linus Walleij