linux-kernel - Re: [PATCH v2 -next] ASoc: tas2770: Fix build error without GPIOLIB

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Date:   Sun, 6 Oct 2019 17:31:58 +0200
From:   mirq-linux@...e.qmqm.pl
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com, ckeepax@...nsource.cirrus.com,
        rf@...nsource.wolfsonmicro.com, piotrs@...nsource.cirrus.com,
        enric.balletbo@...labora.com, paul@...pouillou.net,
        srinivas.kandagatla@...aro.org, andradanciu1997@...il.com,
        kuninori.morimoto.gx@...esas.com, m.felsch@...gutronix.de,
        shifu0704@...ndersoft.com, ladis@...ux-mips.org,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 -next] ASoc: tas2770: Fix build error without GPIOLIB

On Sun, Oct 06, 2019 at 06:46:31PM +0800, YueHaibing wrote:
> If GPIOLIB is not set, building fails:
> 
> sound/soc/codecs/tas2770.c: In function tas2770_reset:
> sound/soc/codecs/tas2770.c:38:3: error: implicit declaration of function gpiod_set_value_cansleep; did you mean gpio_set_value_cansleep? [-Werror=implicit-function-declaration]
>    gpiod_set_value_cansleep(tas2770->reset_gpio, 0);
>    ^~~~~~~~~~~~~~~~~~~~~~~~
>    gpio_set_value_cansleep
> sound/soc/codecs/tas2770.c: In function tas2770_i2c_probe:
> sound/soc/codecs/tas2770.c:749:24: error: implicit declaration of function devm_gpiod_get_optional; did you mean devm_regulator_get_optional? [-Werror=implicit-function-declaration]
>   tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev,
>                         ^~~~~~~~~~~~~~~~~~~~~~~
>                         devm_regulator_get_optional
> sound/soc/codecs/tas2770.c:751:13: error: GPIOD_OUT_HIGH undeclared (first use in this function); did you mean GPIOF_INIT_HIGH?
>              GPIOD_OUT_HIGH);
>              ^~~~~~~~~~~~~~
>              GPIOF_INIT_HIGH
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Fixes: 1a476abc723e ("tas2770: add tas2770 smart PA kernel driver")
> Suggested-by: Ladislav Michl <ladis@...ux-mips.org>
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
> v2: Add missing include file
> ---
>  sound/soc/codecs/tas2770.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/sound/soc/codecs/tas2770.c b/sound/soc/codecs/tas2770.c
> index 9da88cc..a36d0d7 100644
> --- a/sound/soc/codecs/tas2770.c
> +++ b/sound/soc/codecs/tas2770.c
> @@ -15,6 +15,7 @@
>  #include <linux/pm.h>
>  #include <linux/i2c.h>
>  #include <linux/gpio.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/regulator/consumer.h>
>  #include <linux/firmware.h>

The Kconfig part is missing - is this intended? If I guess correctly,
the driver won't work without GPIOLIB, so it should either
'select GPIOLIB' or 'depends on GPIOLIB || COMPILE_TEST' or even
'select GPIOLIB if !COMPILE_TEST'.

Best Regards,
Michał Mirosław