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ASoC: rockchip: pdm: select CONFIG_RATIONAL

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Without this, we get a link error:

sound/soc/rockchip/rockchip_pdm.o: In function `rockchip_pdm_hw_params':
rockchip_pdm.c:(.text+0x754): undefined reference to `rational_best_approximation'

Fixes: 624e8e00ac ("ASoC: rockchip: pdm: fixup pdm fractional div")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Arnd Bergmann 2019-06-17 13:03:51 +02:00 committed by Mark Brown
parent 227ab8baa1
commit 41d92e0c83
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sound/soc/rockchip/Kconfig
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@ -19,6 +19,7 @@ config SND_SOC_ROCKCHIP_PDM
tristate "Rockchip PDM Controller Driver"
depends on CLKDEV_LOOKUP && SND_SOC_ROCKCHIP
select SND_SOC_GENERIC_DMAENGINE_PCM
select RATIONAL
help
Say Y or M if you want to add support for PDM driver for
Rockchip PDM Controller. The Controller supports up to maximum of