linux-kernel - Re: [PATCH v2 1/2] gpio: Add gpio latch driver

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Date:   Fri, 2 Sep 2022 09:42:21 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Sascha Hauer <s.hauer@...gutronix.de>
Cc:     "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Sascha Hauer <kernel@...gutronix.de>
Subject: Re: [PATCH v2 1/2] gpio: Add gpio latch driver

On Wed, Aug 31, 2022 at 9:02 AM Sascha Hauer <s.hauer@...gutronix.de> wrote:
>
> This driver implements a GPIO multiplexer based on latches connected to
> other GPIOs. A set of data GPIOs is connected to the data input of
> multiple latches. The clock input of each latch is driven by another
> set of GPIOs. With two 8-bit latches 10 GPIOs can be multiplexed into
> 16 GPIOs. GPOs might be a better term as in fact the multiplexed pins
> are output only.

So, this is for only one type of latches, now I'm wondering why
gpio-74xx-mmio can't cover this case (with probably small
modifications to the code)?

-- 
With Best Regards,
Andy Shevchenko