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iio: dac: Kconfig: Fix build error for ltc2664

If REGMAP_SPI is n and LTC2664 is y, the following build error occurs:

riscv64-unknown-linux-gnu-ld: drivers/iio/dac/ltc2664.o: in function `ltc2664_probe':
ltc2664.c:(.text+0x714): undefined reference to `__devm_regmap_init_spi'

Select REGMAP_SPI instead of REGMAP for LTC2664 to fix it.

Fixes: 4cc2fc445d2e ("iio: dac: ltc2664: Add driver for LTC2664 and LTC2672")
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://patch.msgid.link/20241024015553.1111253-1-ruanjinjie@huawei.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

authored by Jinjie Ruan and committed by Jonathan Cameron 7bd49239 efa353ae

+1 -1
unified split
+1 -1
drivers/iio/dac/Kconfig
··· 380 config LTC2664 381 tristate "Analog Devices LTC2664 and LTC2672 DAC SPI driver" 382 depends on SPI 383 - select REGMAP 384 help 385 Say yes here to build support for Analog Devices 386 LTC2664 and LTC2672 converters (DAC).
··· 380 config LTC2664 381 tristate "Analog Devices LTC2664 and LTC2672 DAC SPI driver" 382 depends on SPI 383 + select REGMAP_SPI 384 help 385 Say yes here to build support for Analog Devices 386 LTC2664 and LTC2672 converters (DAC).