Add a helper that provides information about whether Trusted Foundations
firmware operations have been registered.
Tested-by: Robert Yang <decatf@xxxxxxxxx>
Tested-by: Michał Mirosław <mirq-linux@xxxxxxxxxxxx>
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
arch/arm/firmware/trusted_foundations.c | 5 +++++
arch/arm/include/asm/trusted_foundations.h | 7 +++++++
2 files changed, 12 insertions(+)
diff --git a/arch/arm/firmware/trusted_foundations.c b/arch/arm/firmware/trusted_foundations.c
index 720904a43c00..bb2ee73d9e02 100644
--- a/arch/arm/firmware/trusted_foundations.c
+++ b/arch/arm/firmware/trusted_foundations.c
@@ -167,3 +167,8 @@ void of_register_trusted_foundations(void)
panic("Trusted Foundation: missing version-minor property\n");
register_trusted_foundations(&pdata);
}
+
+bool trusted_foundations_registered(void)
+{
+ return firmware_ops == &trusted_foundations_ops;
+}
diff --git a/arch/arm/include/asm/trusted_foundations.h b/arch/arm/include/asm/trusted_foundations.h
index 201ceb259e71..54513c533811 100644
--- a/arch/arm/include/asm/trusted_foundations.h
+++ b/arch/arm/include/asm/trusted_foundations.h
@@ -31,6 +31,7 @@
#include <linux/of.h>
#include <linux/cpu.h>
#include <linux/smp.h>
+#include <linux/types.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/outercache.h>
@@ -50,6 +51,7 @@ struct trusted_foundations_platform_data {
void register_trusted_foundations(struct trusted_foundations_platform_data *pd);
void of_register_trusted_foundations(void);
+bool trusted_foundations_registered(void);
#else /* CONFIG_TRUSTED_FOUNDATIONS */
static inline void tf_dummy_write_sec(unsigned long val, unsigned int reg)
@@ -84,6 +86,11 @@ static inline void of_register_trusted_foundations(void)
if (of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations"))
register_trusted_foundations(NULL);
}
+
+static inline bool trusted_foundations_registered(void)
+{
+ return false;
+}
#endif /* CONFIG_TRUSTED_FOUNDATIONS */
#endif
--
2.20.1
