[PATCH] coresight: platform: add OF/APCI dependency

[Arnd Bergmann]

When neither CONFIG_OF nor CONFIG_ACPI are set, we get a harmless
build warning:

drivers/hwtracing/coresight/coresight-platform.c:26:12: error: unused function 'coresight_alloc_conns'
      [-Werror,-Wunused-function]
static int coresight_alloc_conns(struct device *dev,
           ^
drivers/hwtracing/coresight/coresight-platform.c:46:1: error: unused function 'coresight_find_device_by_fwnode'
      [-Werror,-Wunused-function]
coresight_find_device_by_fwnode(struct fwnode_handle *fwnode)

As the code is useless in that configuration anyway, just add
a Kconfig dependency that only allows building when at least
one of the two is set.

This should not hinder compile-testing, as CONFIG_OF can be
enabled on any architecture.

Fixes: ac0e232c12f0 ("coresight: platform: Use fwnode handle for device search")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 drivers/hwtracing/coresight/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 5487d4a1abc2..14638db4991d 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -4,6 +4,7 @@
 #
 menuconfig CORESIGHT
 	bool "CoreSight Tracing Support"
+	depends on OF || ACPI
 	select ARM_AMBA
 	select PERF_EVENTS
 	help
-- 
2.20.0