linux-kernel - Re: [PATCH 1/2] gpio: mmio: introduce BGPIOF_NO_SET_ON

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Date:   Mon, 16 Mar 2020 10:27:31 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Chuanhong Guo <gch981213@...il.com>
Cc:     linux-gpio <linux-gpio@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Sergio Paracuellos <sergio.paracuellos@...il.com>,
        René van Dorst <opensource@...rst.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] gpio: mmio: introduce BGPIOF_NO_SET_ON_INPUT

niedz., 15 mar 2020 o 13:14 Chuanhong Guo <gch981213@...il.com> napisał(a):
>
> Some gpio controllers ignores pin value writing when that pin is
> configured as input mode. As a result, bgpio_dir_out should set
> pin to output before configuring pin values or gpio pin values
> can't be set up properly.
> Introduce two variants of bgpio_dir_out: bgpio_dir_out_val_first
> and bgpio_dir_out_dir_first, and assign direction_output according
> to a new flag: BGPIOF_NO_SET_ON_INPUT.
>
> Signed-off-by: Chuanhong Guo <gch981213@...il.com>

Patch applied with Rene's and Sergio's tags.

Bartosz