1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/renesas/common/common.c b/drivers/renesas/common/common.c
new file mode 100644
index 0000000..a0aa480
--- /dev/null
+++ b/drivers/renesas/common/common.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2018-2021, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <lib/mmio.h>
+
+#include "cpg_registers.h"
+#include "rcar_private.h"
+
+#if IMAGE_BL31
+void __attribute__ ((section(".system_ram"))) cpg_write(uintptr_t regadr, uint32_t regval)
+#else
+void cpg_write(uintptr_t regadr, uint32_t regval)
+#endif
+{
+	uint32_t value = regval;
+
+	mmio_write_32(CPG_CPGWPR, ~value);
+	mmio_write_32(regadr, value);
+}
+
+#if IMAGE_BL31
+void __attribute__ ((section(".system_ram"))) mstpcr_write(uint32_t mstpcr, uint32_t mstpsr,
+							   uint32_t target_bit)
+#else
+void mstpcr_write(uint32_t mstpcr, uint32_t mstpsr, uint32_t target_bit)
+#endif
+{
+	uint32_t reg;
+
+	reg = mmio_read_32(mstpcr);
+	reg &= ~target_bit;
+	cpg_write(mstpcr, reg);
+	while ((mmio_read_32(mstpsr) & target_bit) != 0U) {
+	}
+}