1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/mach-stm32mp/include/mach/smc.h b/arch/arm/mach-stm32mp/include/mach/smc.h
new file mode 100644
index 0000000000..6b8e62bd53
--- /dev/null
+++ b/arch/arm/mach-stm32mp/include/mach/smc.h
@@ -0,0 +1,28 @@
+#ifndef __MACH_STM32_SMC_H__
+#define __MACH_STM32_SMC_H__
+
+#include <linux/arm-smccc.h>
+
+/* Secure Service access from Non-secure */
+#define STM32_SMC_RCC                   0x82001000
+#define STM32_SMC_PWR                   0x82001001
+#define STM32_SMC_RTC                   0x82001002
+#define STM32_SMC_BSEC                  0x82001003
+
+/* Register access service use for RCC/RTC/PWR */
+#define STM32_SMC_REG_WRITE             0x1
+#define STM32_SMC_REG_SET               0x2
+#define STM32_SMC_REG_CLEAR             0x3
+
+static inline int stm32mp_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *val)
+{
+        struct arm_smccc_res res;
+
+        arm_smccc_smc(svc, op, data1, data2, 0, 0, 0, 0, &res);
+        if (val)
+                *val = res.a1;
+
+        return (int)res.a0;
+}
+
+#endif