[PATCH 2/3] ASoC: fsl: lpc3xxx-i2s: select REGMAP_MMIO

[Jude Gyimah]

lpc3xxx-i2s calls __devm_regmap_init_mmio_clk, which
drivers/base/regmap/regmap-mmio.c provides under REGMAP_MMIO.

  lpc3xxx-i2s.c:320:(.text+0x13b8f6): undefined reference to
    `__devm_regmap_init_mmio_clk'

The driver can be built into vmlinux while REGMAP_MMIO is a module, in
which case the symbol is not there at link time.

Select rather than depend on: REGMAP_MMIO has no prompt of its own and is
only ever enabled by a select, so a depends on would leave
SND_SOC_FSL_LPC3XXX unselectable.

Reproduced on v7.3, x86_64, with CONFIG_SND_SOC_FSL_LPC3XXX=y and
CONFIG_REGMAP_MMIO=m.

Found with kreach, a static check that compares what Kconfig allows
against the symbols the compiled objects actually reference.

Fixes: 0959de657a10 ("ASoC: fsl: Add i2s and pcm drivers for LPC32xx CPUs")
Signed-off-by: Jude Gyimah <jude.gyimah87@xxxxxxxxx>
---
 sound/soc/fsl/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index e8924ed652ba..2f58a1a51afd 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -140,6 +140,7 @@ config SND_SOC_FSL_RPMSG
 config SND_SOC_FSL_LPC3XXX
 	tristate "SoC Audio for NXP LPC32XX CPUs"
 	depends on ARCH_LPC32XX || COMPILE_TEST
+	select REGMAP_MMIO
 	select SND_SOC_GENERIC_DMAENGINE_PCM
 	help
 	  Say Y or M if you want to add support for the LPC3XXX I2S interface.
-- 
2.43.0