[PATCH] ASoC: rockchip: i2s: Add dependency to I2S device driver

[Mark Brown]

On Fri, Nov 21, 2014 at 07:35:13PM +0100, Andreas Ruprecht wrote:
> Currently, CONFIG_SND_SOC_ROCKCHIP_I2S could also be selected
> without having CONFIG_SND_SOC_ROCKCHIP enabled.
> 
> As this makes no sense (and breaks the build, when the option
> CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM - which would be selected by
> CONFIG_SND_SOC_ROCKCHIP - is not enabled), a Kconfig dependency
> is added to CONFIG_SND_SOC_ROCKCHIP_I2S. This will make the item
> visible only if CONFIG_SND_SOC_ROCKCHIP is enabled.

This doesn't seem like an obvious fix - why is the fix not to put the
select on the I2S driver (which is the thing that actually depends on
the dmaengine stuff)?  
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