The newly added scpi thermal support is broken when the scpi driver
is built-in but the thermal driver is a loadable module:
drivers/built-in.o: In function `scpi_hwmon_probe':
(.text+0x444d70): undefined reference to `thermal_zone_of_sensor_unregister'
(.text+0x444d94): undefined reference to `thermal_zone_of_sensor_register'
drivers/built-in.o: In function `scpi_hwmon_remove':
(text+0x444e6c): undefined reference to `thermal_zone_of_sensor_unregister'
This uses the same Kconfig trick that we have in a couple of other
drivers already to ensure we can only select the driver in valid
configurations when either THERMAL_OF is disabled, or when with a
dependency on CONFIG_THERMAL that can force SCPI to be a loadable
module in the case I was hitting.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Fixes: 68acc77a2d51 ("hwmon: Support thermal zones registration for SCP temperature sensors")
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 842b0043ad94..597814177f50 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -324,6 +324,7 @@ config SENSORS_APPLESMC
config SENSORS_ARM_SCPI
tristate "ARM SCPI Sensors"
depends on ARM_SCPI_PROTOCOL
+ depends on THERMAL || !THERMAL_OF
help
This driver provides support for temperature, voltage, current
and power sensors available on ARM Ltd's SCP based platforms. The
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