renesas: rzg: Add PFC support for RZ/G2M

Add pin control support for RZ/G2M SoC.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Change-Id: I08719015cab1ec59e2270523980a0a3e26e72c01

drivers/renesas/rzg/pfc/G2M/pfc_init_g2m.h

+/*
+ * Copyright (c) 2020, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PFC_INIT_G2M_H
+#define PFC_INIT_G2M_H
+
+void pfc_init_g2m(void);
+
+#endif /* PFC_INIT_G2M_H */

drivers/renesas/rzg/pfc/pfc.mk

+#
+# Copyright (c) 2020, Renesas Electronics Corporation. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+ifeq (${RCAR_LSI},${RCAR_AUTO})
+    BL2_SOURCES += drivers/renesas/rzg/pfc/G2M/pfc_init_g2m.c
+
+else ifdef RCAR_LSI_CUT_COMPAT
+  ifeq (${RCAR_LSI},${RZ_G2M})
+    BL2_SOURCES += drivers/renesas/rzg/pfc/G2M/pfc_init_g2m.c
+  endif
+else
+  ifeq (${RCAR_LSI},${RZ_G2M})
+    BL2_SOURCES += drivers/renesas/rzg/pfc/G2M/pfc_init_g2m.c
+  endif
+endif
+
+BL2_SOURCES += drivers/renesas/rzg/pfc/pfc_init.c

drivers/renesas/rzg/pfc/pfc_init.c

+/*
+ * Copyright (c) 2020, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <stdint.h>
+
+#include <common/debug.h>
+#include <lib/mmio.h>
+
+#if RCAR_LSI == RCAR_AUTO
+#include "G2M/pfc_init_g2m.h"
+#endif /* RCAR_LSI == RCAR_AUTO */
+#if (RCAR_LSI == RZ_G2M)
+#include "G2M/pfc_init_g2m.h"
+#endif /* RCAR_LSI == RZ_G2M */
+#include "rcar_def.h"
+
+#define PRR_PRODUCT_ERR(reg)				\
+	do {						\
+		ERROR("LSI Product ID(PRR=0x%x) PFC init not supported.\n", \
+			reg);				\
+		panic();				\
+	} while (0)
+
+#define PRR_CUT_ERR(reg)				\
+	do {						\
+		ERROR("LSI Cut ID(PRR=0x%x) PFC init not supported.\n", \
+			reg);				\
+		panic();\
+	} while (0)
+
+void rzg_pfc_init(void)
+{
+	uint32_t reg;
+
+	reg = mmio_read_32(RCAR_PRR);
+#if RCAR_LSI == RCAR_AUTO
+	switch (reg & PRR_PRODUCT_MASK) {
+	case PRR_PRODUCT_M3:
+		pfc_init_g2m();
+		break;
+	default:
+		PRR_PRODUCT_ERR(reg);
+		break;
+	}
+
+#elif RCAR_LSI_CUT_COMPAT /* RCAR_LSI == RCAR_AUTO */
+	switch (reg & PRR_PRODUCT_MASK) {
+	case PRR_PRODUCT_M3:
+#if RCAR_LSI != RZ_G2M
+		PRR_PRODUCT_ERR(reg);
+#else /* RCAR_LSI != RZ_G2M */
+		pfc_init_g2m();
+#endif /* RCAR_LSI != RZ_G2M */
+		break;
+	default:
+		PRR_PRODUCT_ERR(reg);
+		break;
+	}
+
+#else /* RCAR_LSI == RCAR_AUTO */
+#if (RCAR_LSI == RZ_G2M)
+	if ((reg & PRR_PRODUCT_MASK) != PRR_PRODUCT_M3) {
+		PRR_PRODUCT_ERR(reg);
+	}
+	pfc_init_m3();
+#else /* RCAR_LSI == RZ_G2M */
+#error "Don't have PFC initialize routine(unknown)."
+#endif /* RCAR_LSI == RZ_G2M */
+#endif /* RCAR_LSI == RCAR_AUTO */
+}