board: rzg2l: Add RZ/G2L SMARC EVK board

The Renesas RZ/G2L SMARC Evaluation Board Kit consists of the RZ/G2L
System-on-Module (SOM) based on the R9A07G044L2 SoC, and a common SMARC
carrier board.

The ARM TrustedFirmware code for the Renesas RZ/G2L SoC family passes a
devicetree blob to the bootloader as an argument in the same was
previous R-Car gen3/gen4 SoCs. This blob contains a compatible string
which can be used to identify the particular SoC we are running on and
this is used to select the appropriate device tree to load.

The configuration renesas_rzg2l_smarc_defconfig is added to support
building for this target. In the future this defconfig will be extended
to support other SoCs and evaluation boards from the RZ/G2L family.

Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

arch/arm/mach-rmobile/Kconfig.rzg2l

@@ -9,6 +9,20 @@ config R9A07G044L
 	help
 	  Enable support for the Renesas R9A07G044L (RZ/G2L) SoC.
 
+choice
+	prompt "Renesas RZ/G2L Family Board selection"
+	default TARGET_RZG2L_SMARC_EVK
+
+config TARGET_RZG2L_SMARC_EVK
+	bool "Renesas RZ/G2L SMARC EVK"
+	imply R9A07G044L
+	help
+	  Enable support for the RZ/G2L SMARC evaluation board.
+
+source "board/renesas/rzg2l/Kconfig"
+
+endchoice
+
 config MULTI_DTB_FIT_UNCOMPRESS_SZ
 	default 0x80000 if TARGET_RZG2L_SMARC_EVK
 

board/renesas/rzg2l/Kconfig

@@ -0,0 +1,18 @@
+# Copyright (C) 2023 Renesas Electronics Corporation
+# SPDX-License-Identifier: GPL-2.0+
+
+if TARGET_RZG2L_SMARC_EVK
+
+config SYS_SOC
+	default "rmobile"
+
+config SYS_BOARD
+	default "rzg2l"
+
+config SYS_VENDOR
+	default "renesas"
+
+config SYS_CONFIG_NAME
+	default "rzg2l-smarc"
+
+endif

board/renesas/rzg2l/MAINTAINERS

@@ -0,0 +1,6 @@
+RENESAS RZG2L BOARD FAMILY
+M:	Paul Barker <paul.barker.ct@bp.renesas.com>
+S:	Supported
+F:	arch/arm/dts/rz-smarc-common.dtsi
+N:	rzg2l
+N:	r9a07g044

board/renesas/rzg2l/Makefile

@@ -0,0 +1,4 @@
+# Copyright (C) 2023 Renesas Electronics Corporation
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y	:= rzg2l.o

board/renesas/rzg2l/rzg2l.c

@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * RZ/G2L board support.
+ * Copyright (C) 2023 Renesas Electronics Corporation
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <linux/libfdt.h>
+
+#if IS_ENABLED(CONFIG_MULTI_DTB_FIT)
+/* If the firmware passed a device tree, use it for board identification. */
+extern u64 rcar_atf_boot_args[];
+
+static bool is_rzg2l_board(const char *board_name)
+{
+	void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]);
+
+	return fdt_node_check_compatible(atf_fdt_blob, 0, board_name) == 0;
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]);
+
+	if (fdt_magic(atf_fdt_blob) != FDT_MAGIC)
+		return -1;
+
+	if (is_rzg2l_board("renesas,r9a07g044l2"))
+		return strcmp(name, "r9a07g044l2-smarc");
+
+	return -1;
+}
+#endif
+
+static void apply_atf_overlay(void *fdt_blob)
+{
+	void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]);
+
+	if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
+		fdt_overlay_apply_node(fdt_blob, 0, atf_fdt_blob, 0);
+}
+
+int fdtdec_board_setup(const void *fdt_blob)
+{
+	apply_atf_overlay((void *)fdt_blob);
+
+	return 0;
+}
+
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+	return 0;
+}
+
+int board_init(void)
+{
+	return 0;
+}
+
+void reset_cpu(void)
+{
+	/*
+	 * TODO: Implement reset support once TrustedFirmware supports
+	 * the appropriate call.
+	 */
+}

configs/renesas_rzg2l_smarc_defconfig

@@ -0,0 +1,52 @@
+CONFIG_ARM=y
+CONFIG_COUNTER_FREQUENCY=16666666
+CONFIG_SYS_INIT_SP_BSS_OFFSET=1048576
+CONFIG_ARCH_CPU_INIT=y
+CONFIG_ARCH_RMOBILE=y
+CONFIG_TEXT_BASE=0x50000000
+CONFIG_SYS_MALLOC_LEN=0x4000000
+CONFIG_SYS_MALLOC_F_LEN=0x80000
+CONFIG_ENV_SIZE=0x20000
+CONFIG_ENV_OFFSET=0xFFFE0000
+CONFIG_DM_GPIO=y
+CONFIG_DEFAULT_DEVICE_TREE="r9a07g044l2-smarc"
+CONFIG_RZG2L=y
+CONFIG_SYS_MONITOR_LEN=1048576
+CONFIG_SYS_LOAD_ADDR=0x58000000
+CONFIG_REMAKE_ELF=y
+CONFIG_FIT=y
+CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_USE_BOOTARGS=y
+# CONFIG_BOARD_EARLY_INIT_F is not set
+CONFIG_SYS_MALLOC_BOOTPARAMS=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_MAXARGS=64
+CONFIG_SYS_PBSIZE=2068
+CONFIG_CMD_CLK=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_PART=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_OF_CONTROL=y
+CONFIG_MULTI_DTB_FIT_LZO=y
+CONFIG_MULTI_DTB_FIT_USER_DEFINED_AREA=y
+CONFIG_ENV_OVERWRITE=y
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_SYS_MMC_ENV_PART=2
+CONFIG_VERSION_VARIABLE=y
+CONFIG_REGMAP=y
+CONFIG_CLK=y
+CONFIG_CLK_RENESAS=y
+# CONFIG_CLK_RCAR_GEN3 is not set
+CONFIG_GPIO_HOG=y
+CONFIG_MMC_IO_VOLTAGE=y
+CONFIG_MMC_UHS_SUPPORT=y
+CONFIG_MMC_HS400_SUPPORT=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y

include/configs/rzg2l-smarc.h

@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Renesas Electronics Corporation
+ */
+
+#ifndef __RENESAS_RZG2L_H
+#define __RENESAS_RZG2L_H
+
+#include <asm/arch/rmobile.h>
+
+/* console */
+#define CFG_SYS_BAUDRATE_TABLE	{ 115200, 38400 }
+
+#endif /* __RENESAS_RZG2L_H */