The r-car sound driver only works when CONFIG_OF is set, and after a recent change has a compile-time dependency as well:

sound/built-in.o: In function `rsnd_dma_request_channel': :(.text+0x9fb84): undefined reference to `of_dma_request_slave_channel'

This could be fixed either by adding a static inline wrapper for the function, or by adding a Kconfig dependency. This implements the second approach, which seems appropriate because the driver in fact has a hard dependency.

Signed-off-by: Arnd Bergmann arnd@arndb.de Fixes: 72adc61f4637aa3 ("ASoC: rsnd: 1st DMAC dma-names cares subnode")

diff --git a/sound/soc/sh/Kconfig b/sound/soc/sh/Kconfig index 2b3030415573..07114b0b0dc1 100644 --- a/sound/soc/sh/Kconfig +++ b/sound/soc/sh/Kconfig @@ -36,6 +36,7 @@ config SND_SOC_SH4_SIU

config SND_SOC_RCAR tristate "R-Car series SRU/SCU/SSIU/SSI support" + depends on DMA_OF select SND_SIMPLE_CARD select REGMAP_MMIO help