linux-kernel - Re: [PATCH v1 2/2] ALSA: hda: cs35l41: Only add SPI CS GPIO if SPI is enabled in kernel

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Date: Wed, 20 Dec 2023 09:10:37 +0100
From: Takashi Iwai <tiwai@...e.de>
To: Stefan Binding <sbinding@...nsource.cirrus.com>
Cc: Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	<alsa-devel@...a-project.org>,
	<linux-sound@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<patches@...nsource.cirrus.com>,
	kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v1 2/2] ALSA: hda: cs35l41: Only add SPI CS GPIO if SPI is enabled in kernel

On Tue, 19 Dec 2023 17:22:32 +0100,
Stefan Binding wrote:
> 
> If CONFIG_SPI is not set in the kernel, there is no point in trying
> to set the chip selects. We can selectively compile it.

I guess it should with IS_REACHABLE() instead of IS_ENABLED()?
It can be still CONFIG_SPI=m while CONFIG_SND_HDA_*=y.


thanks,

Takashi


> 
> Fixes: 8c4c216db8fb ("ALSA: hda: cs35l41: Add config table to support many laptops without _DSD")
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202312192256.lJelQEoZ-lkp@intel.com/
> 
> Signed-off-by: Stefan Binding <sbinding@...nsource.cirrus.com>
> ---
>  sound/pci/hda/cs35l41_hda_property.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/sound/pci/hda/cs35l41_hda_property.c b/sound/pci/hda/cs35l41_hda_property.c
> index 73b304e6c83c..194e1179a253 100644
> --- a/sound/pci/hda/cs35l41_hda_property.c
> +++ b/sound/pci/hda/cs35l41_hda_property.c
> @@ -210,6 +210,8 @@ static int generic_dsd_config(struct cs35l41_hda *cs35l41, struct device *physde
>  
>  	if (cfg->bus == SPI) {
>  		cs35l41->index = id;
> +
> +#if IS_ENABLED(CONFIG_SPI)
>  		/*
>  		 * Manually set the Chip Select for the second amp <cs_gpio_index> in the node.
>  		 * This is only supported for systems with 2 amps, since we cannot expand the
> @@ -249,6 +251,7 @@ static int generic_dsd_config(struct cs35l41_hda *cs35l41, struct device *physde
>  				spi_setup(spi);
>  			}
>  		}
> +#endif
>  	} else {
>  		if (cfg->num_amps > 2)
>  			/*
> -- 
> 2.34.1
>