mfd: si476x: Add GPIOLIB_LEGACY dependency

This driver uses the legacy gpiolib interfaces to get gpio
numbers from platform data:

drivers/mfd/si476x-i2c.c: In function 'si476x_core_start':
   drivers/mfd/si476x-i2c.c:133:21: error: implicit declaration of function 'gpio_is_valid'; did you mean 'uuid_is_valid'? [-Werror=implicit-function-declaration]
     133 |                 if (gpio_is_valid(core->gpio_reset))

There are no in-tree users of this driver, so nothing defines
the platform data.

Add a dependency on GPIOLIB_LEGACY for the moment to avoid the build
failure, and make sure the sound driver does not get built without the
mfd portion either pass that dependency along.

Alternatively, we could remove the mfd driver along with the radio and
sound portions.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202507231653.UFlH2dMO-lkp@intel.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20250808151822.536879-14-arnd@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 4b04ade..97ab36d 100644 (file)
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1426,6 +1426,7 @@ config MFD_SEC_I2C
 config MFD_SI476X_CORE
        tristate "Silicon Laboratories 4761/64/68 AM/FM radio."
        depends on I2C
+       depends on GPIOLIB_LEGACY
        select MFD_CORE
        select REGMAP_I2C
        help

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 6d7e472..dfe907c 100644 (file)
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -1902,6 +1902,7 @@ config SND_SOC_SGTL5000
 
 config SND_SOC_SI476X
        tristate
+       depends on MFD_SI476X_CORE
 
 config SND_SOC_SIGMADSP
        tristate