rcar_gen3: drivers: spi multio bus controller
Signed-off-by: ldts <jramirez@baylibre.com>
diff --git a/drivers/renesas/rcar/rpc/rpc_driver.c b/drivers/renesas/rcar/rpc/rpc_driver.c
new file mode 100644
index 0000000..bc7424a
--- /dev/null
+++ b/drivers/renesas/rcar/rpc/rpc_driver.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2015-2018, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <mmio.h>
+#include <stdint.h>
+#include <string.h>
+#include "cpg_registers.h"
+#include "rpc_registers.h"
+#include "debug.h"
+#include "rcar_private.h"
+
+#define MSTPSR9_RPC_BIT (0x00020000U)
+#define RPC_CMNCR_MD_BIT (0x80000000U)
+
+static void rpc_enable(void)
+{
+ /* Enable clock supply to RPC. */
+ mstpcr_write(CPG_SMSTPCR9, CPG_MSTPSR9, MSTPSR9_RPC_BIT);
+}
+
+static void rpc_setup(void)
+{
+ if (mmio_read_32(RPC_CMNCR) & RPC_CMNCR_MD_BIT)
+ mmio_clrbits_32(RPC_CMNCR, RPC_CMNCR_MD_BIT);
+}
+
+void rcar_rpc_init(void)
+{
+ rpc_enable();
+ rpc_setup();
+}