Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8;
 format=flowed
Content-Transfer-Encoding: 8bit
Date:   Tue, 02 Mar 2021 19:16:16 +0100
From:   Michael Walle <michael@walle.cc>
To:     =?UTF-8?Q?=C3=81lvaro_Fern=C3=A1ndez_Rojas?= <noltari@gmail.com>
Cc:     Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>,
        Andy Shevchenko <andy.shevchenko@gmail.com>,
        linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] gpio: regmap: fix direction register check
In-Reply-To: <20210302180621.12301-1-noltari@gmail.com>
References: <20210302180621.12301-1-noltari@gmail.com>
User-Agent: Roundcube Webmail/1.4.11
Message-ID: <c05bf9228206786a09f4f17160a2edf9@walle.cc>
Precedence: bulk

Am 2021-03-02 19:06, schrieb Álvaro Fernández Rojas:
> If there's a direction register, we should also have dat or set 
> registers.
> However, we only need one of them, not both.

Can you give some more context or an example? If there is a direction
register, we'd need to set and get the value, no?

-michael

> Fixes: ebe363197e52 ("gpio: add a reusable generic gpio_chip using 
> regmap")
> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
> ---
>  drivers/gpio/gpio-regmap.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c
> index 23b0a8572f53..5a9fca00b5e8 100644
> --- a/drivers/gpio/gpio-regmap.c
> +++ b/drivers/gpio/gpio-regmap.c
> @@ -194,7 +194,7 @@ struct gpio_regmap *gpio_regmap_register(const
> struct gpio_regmap_config *config
> 
>  	/* if we have a direction register we need both input and output */
>  	if ((config->reg_dir_out_base || config->reg_dir_in_base) &&
> -	    (!config->reg_dat_base || !config->reg_set_base))
> +	    (!config->reg_dat_base && !config->reg_set_base))
>  		return ERR_PTR(-EINVAL);
> 
>  	/* we don't support having both registers simultaneously for now */