linux-kernel - Re: [PATCH 4/5] gpio: xilinx: Utilize generic bitmap_get_value and _set

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Message-ID: <CACRpkdYmoEjTzWv7wdrHhc8VFxFB+=QQwKA6YY+prydjgUB2aw@mail.gmail.com>
Date:   Sun, 27 Dec 2020 22:29:38 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Syed Nayyar Waris <syednwaris@...il.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        Michal Simek <michal.simek@...inx.com>,
        Arnd Bergmann <arnd@...db.de>,
        Robert Richter <rrichter@...vell.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        "(Exiting) Amit Kucheria" <amit.kucheria@...durent.com>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: [PATCH 4/5] gpio: xilinx: Utilize generic bitmap_get_value and _set_value

On Sat, Dec 26, 2020 at 7:44 AM Syed Nayyar Waris <syednwaris@...il.com> wrote:

> This patch reimplements the xgpio_set_multiple() function in
> drivers/gpio/gpio-xilinx.c to use the new generic functions:
> bitmap_get_value() and bitmap_set_value(). The code is now simpler
> to read and understand. Moreover, instead of looping for each bit
> in xgpio_set_multiple() function, now we can check each channel at
> a time and save cycles.
>
> Cc: William Breathitt Gray <vilhelm.gray@...il.com>
> Cc: Bartosz Golaszewski <bgolaszewski@...libre.com>
> Cc: Michal Simek <michal.simek@...inx.com>
> Signed-off-by: Syed Nayyar Waris <syednwaris@...il.com>

(...)

> +#include <../drivers/gpio/clump_bits.h>

What is this?

Isn't a simple

#include "clump_bits.h"

enough?

We need an ACK from the Xilinx people that they think this
actually improves the readability and maintainability of their
driver.

Yours,
Linus Walleij