1 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/mach-renesas/psci-rcar64.c b/arch/arm/mach-renesas/psci-rcar64.c
new file mode 100644
index 00000000000..a230692c9e0
--- /dev/null
+++ b/arch/arm/mach-renesas/psci-rcar64.c
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This file implements basic PSCI support for Renesas R-Car 64bit SoCs
+ *
+ * Copyright (C) 2020 Renesas Electronics Corp.
+ */
+
+#include <asm/io.h>
+#include <asm/psci.h>
+#include <asm/secure.h>
+
+int __secure psci_features(u32 function_id, u32 psci_fid)
+{
+	switch (psci_fid) {
+	case ARM_PSCI_0_2_FN_PSCI_VERSION:
+	case ARM_PSCI_0_2_FN_SYSTEM_RESET:
+		return 0x0;
+	}
+	/* case ARM_PSCI_0_2_FN_CPU_ON: */
+	/* case ARM_PSCI_0_2_FN_CPU_OFF: */
+	/* case ARM_PSCI_0_2_FN_AFFINITY_INFO: */
+	/* case ARM_PSCI_0_2_FN_MIGRATE_INFO_TYPE: */
+	/* case ARM_PSCI_0_2_FN_SYSTEM_OFF: */
+	return ARM_PSCI_RET_NI;
+}
+
+u32 __secure psci_version(void)
+{
+	return ARM_PSCI_VER_0_2;
+}
+
+#define RST_BASE	0xE6160000 /* Domain0 */
+#define RST_SRESCR0	(RST_BASE + 0x18)
+#define RST_SPRES	0x5AA58000
+
+void __secure __noreturn psci_system_reset(void)
+{
+	writel(RST_SPRES, RST_SRESCR0);
+
+	while (1)
+		;
+}
+
+int psci_update_dt(void *fdt)
+{
+	return 0;
+}