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iio: adc: ad_sigma_delta: allow COMPILE_TEST in isolation

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AD_SIGMA_DELTA is a hidden tristate that can only be enabled by
selecting drivers (AD7124, AD7192, etc.), all of which require SPI.
This prevents compile-testing the library code directly with allmodconfig
or by manually enabling it with COMPILE_TEST.

Add a prompt string guarded by "if COMPILE_TEST" so the symbol becomes
directly selectable when COMPILE_TEST is set.

Also add an explicit "depends on SPI" since the ad_sigma_delta library
directly calls SPI core symbols such as spi_bus_lock(), spi_bus_unlock(),
and spi_sync_locked().

Signed-off-by: Radu Sabau <radu.sabau@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Radu Sabau 2026-06-08 12:02:54 +03:00 committed by Jonathan Cameron
parent 8a4eb07a93
commit c2d11f5cc2
1 changed files with 2 additions and 1 deletions
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3
drivers/iio/adc/Kconfig
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@ -33,7 +33,8 @@ config AB8500_GPADC
and USB voltages integral to the U8500 platform.
config AD_SIGMA_DELTA
tristate
tristate "Analog Devices Sigma-Delta Modulator support" if COMPILE_TEST
depends on SPI
select IIO_BUFFER
select IIO_BUFFER_DMAENGINE
select IIO_TRIGGERED_BUFFER