rcar_gen3: drivers: spi multio bus controller

Signed-off-by: ldts <jramirez@baylibre.com>

drivers/renesas/rcar/rpc/rpc_driver.c

+/*
+ * 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();
+}

drivers/renesas/rcar/rpc/rpc_registers.h

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef RPC_REGISTER_H__
+#define RPC_REGISTER_H__
+
+#define RPC_BASE	(0xEE200000U)
+#define RPC_CMNCR	(RPC_BASE + 0x0000U)
+#define RPC_SSLDR	(RPC_BASE + 0x0004U)
+#define RPC_DRCR	(RPC_BASE + 0x000CU)
+#define RPC_DRCMR	(RPC_BASE + 0x0010U)
+#define RPC_DRENR	(RPC_BASE + 0x001CU)
+#define RPC_SMCR	(RPC_BASE + 0x0020U)
+#define RPC_SMCMR	(RPC_BASE + 0x0024U)
+#define RPC_SMENR	(RPC_BASE + 0x0030U)
+#define RPC_CMNSR	(RPC_BASE + 0x0048U)
+#define RPC_DRDMCR	(RPC_BASE + 0x0058U)
+#define RPC_DRDRENR	(RPC_BASE + 0x005CU)
+#define RPC_PHYCNT	(RPC_BASE + 0x007CU)
+#define RPC_PHYINT	(RPC_BASE + 0x0088U)
+
+#endif