[alsa-devel] [PATCH] ASoC: Tegra and i.MX are mutually exclusive

[Stephen Warren]

On 06/24/2013 09:04 AM, Arnd Bergmann wrote:
> Both Tegra and i.MX provide ac97 operations, which can only
> exist once in the kernel. They can both be built as loadable
> modules (only one of them needs to be loaded anyway), but we
> have to disallow enabling them both as built-in.

> diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig

>  menuconfig SND_IMX_SOC
>  	tristate "SoC Audio for Freescale i.MX CPUs"
>  	depends on ARCH_MXC
> +	depends on SND_SOC_TEGRA=n || (SND_SOC_TEGRA=m && m)

I can easily see how this prevents adding SND_IMX_SOC to a config if
SND_SOC_TEGRA is enabled, but I'm not sure about the other way around;
does Kconfig check that adding a new SND_SOC_TEGRA wouldn't invalidate
any of the depends of any already-selected options?

In other words, do you need to make the "same" change to Tegra?