[6/6] bcm96750ref1: add initial support

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 568b95a..a3e9130 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1839,6 +1839,7 @@  source "board/broadcom/bcm23550_w1d/Kconfig"
 source "board/broadcom/bcm28155_ap/Kconfig"
 source "board/broadcom/bcm963158/Kconfig"
 source "board/broadcom/bcm968360bg/Kconfig"
+source "board/broadcom/bcm96750ref1/Kconfig"
 source "board/broadcom/bcm968580xref/Kconfig"
 source "board/broadcom/bcmcygnus/Kconfig"
 source "board/broadcom/bcmnsp/Kconfig"
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 9c593b2..e3dcd89 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -871,6 +871,9 @@  dtb-$(CONFIG_ARCH_BCM63158) += \
 dtb-$(CONFIG_ARCH_BCM68360) += \
 	bcm968360bg.dtb
 
+dtb-$(CONFIG_ARCH_BCM6750) += \
+	bcm96750ref1.dtb
+
 dtb-$(CONFIG_ARCH_BCM6858) += \
 	bcm968580xref.dtb
 
diff --git a/arch/arm/dts/bcm96750ref1.dts b/arch/arm/dts/bcm96750ref1.dts
new file mode 100644
index 0000000..ac607b4
--- /dev/null
+++ b/arch/arm/dts/bcm96750ref1.dts
@@ -0,0 +1,78 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Philippe Reynes <philippe.reynes at softathome.com>
+ */
+
+/dts-v1/;
+
+#include "bcm6750.dtsi"
+
+/ {
+	model = "Broadcom bcm6750ref1";
+	compatible = "broadcom,bcm6750ref1", "brcm,bcm6750";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x40000000>;
+	};
+};
+
+&uart0 {
+	u-boot,dm-pre-reloc;
+	status = "okay";
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&gpio2 {
+	status = "okay";
+};
+
+&gpio3 {
+	status = "okay";
+};
+
+&gpio4 {
+	status = "okay";
+};
+
+&gpio5 {
+	status = "okay";
+};
+
+&gpio6 {
+	status = "okay";
+};
+
+&gpio7 {
+	status = "okay";
+};
+
+&nand {
+	status = "okay";
+	write-protect = <0>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	nandcs at 0 {
+		compatible = "brcm,nandcs";
+		reg = <0>;
+		nand-ecc-strength = <8>;
+		nand-ecc-step-size = <512>;
+		brcm,nand-oob-sector-size = <27>;
+	};
+};
diff --git a/board/broadcom/bcm96750ref1/Kconfig b/board/broadcom/bcm96750ref1/Kconfig
new file mode 100644
index 0000000..e76e2be
--- /dev/null
+++ b/board/broadcom/bcm96750ref1/Kconfig
@@ -0,0 +1,16 @@ 
+if ARCH_BCM6750
+
+config SYS_VENDOR
+	default "broadcom"
+
+config SYS_BOARD
+	default "bcm96750ref1"
+
+config SYS_CONFIG_NAME
+	default "broadcom_bcm96750ref1"
+
+endif
+
+config TARGET_BCM96750REF1
+	bool "Support Broadcom bcm96750ref1"
+	depends on ARCH_BCM6750
diff --git a/board/broadcom/bcm96750ref1/MAINTAINERS b/board/broadcom/bcm96750ref1/MAINTAINERS
new file mode 100644
index 0000000..e7a5c9c
--- /dev/null
+++ b/board/broadcom/bcm96750ref1/MAINTAINERS
@@ -0,0 +1,6 @@ 
+BCM96750REF1 BOARD
+M:	Philippe Reynes <philippe.reynes at softathome.com>
+S:	Maintained
+F:	board/broadcom/bcm96750ref1
+F:	include/configs/broadcom_bcm96750ref1.h
+F:	configs/bcm96750ref1_ram_defconfig
diff --git a/board/broadcom/bcm96750ref1/Makefile b/board/broadcom/bcm96750ref1/Makefile
new file mode 100644
index 0000000..ac4ffae
--- /dev/null
+++ b/board/broadcom/bcm96750ref1/Makefile
@@ -0,0 +1,3 @@ 
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y	+= bcm96750ref1.o
diff --git a/board/broadcom/bcm96750ref1/bcm96750ref1.c b/board/broadcom/bcm96750ref1/bcm96750ref1.c
new file mode 100644
index 0000000..4e26cfa
--- /dev/null
+++ b/board/broadcom/bcm96750ref1/bcm96750ref1.c
@@ -0,0 +1,44 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Philippe Reynes <philippe.reynes at softathome.com>
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <linux/io.h>
+#include <cpu_func.h>
+
+int board_init(void)
+{
+	return 0;
+}
+
+int dram_init(void)
+{
+	if (fdtdec_setup_mem_size_base() != 0)
+		printf("fdtdec_setup_mem_size_base() has failed\n");
+
+	return 0;
+}
+
+int dram_init_banksize(void)
+{
+	fdtdec_setup_memory_banksize();
+
+	return 0;
+}
+
+int print_cpuinfo(void)
+{
+	return 0;
+}
+
+void enable_caches(void)
+{
+#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
+	icache_enable();
+#endif
+#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
+	dcache_enable();
+#endif
+}
diff --git a/configs/bcm96750ref1_ram_defconfig b/configs/bcm96750ref1_ram_defconfig
new file mode 100644
index 0000000..714077a
--- /dev/null
+++ b/configs/bcm96750ref1_ram_defconfig
@@ -0,0 +1,68 @@ 
+CONFIG_ARM=y
+CONFIG_SYS_ARCH_TIMER=y
+CONFIG_ARCH_BCM6750=y
+CONFIG_SYS_TEXT_BASE=0x60100000
+CONFIG_ENV_SIZE=0x20000
+CONFIG_DM_GPIO=y
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_ARMV7_LPAE=y
+CONFIG_TARGET_BCM96750REF1=y
+CONFIG_ENV_VARS_UBOOT_CONFIG=y
+CONFIG_FIT=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_FIT_ENABLE_RSASSA_PSS_SUPPORT=y
+CONFIG_FIT_CIPHER=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_LEGACY_IMAGE_FORMAT=y
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_SILENT_CONSOLE=y
+CONFIG_SYS_CONSOLE_IS_IN_ENV=y
+CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_HUSH_PARSER=y
+# CONFIG_AUTOBOOT is not set
+# CONFIG_CMD_BOOTD is not set
+# CONFIG_BOOTM_NETBSD is not set
+# CONFIG_BOOTM_PLAN9 is not set
+# CONFIG_BOOTM_RTEMS is not set
+# CONFIG_BOOTM_VXWORKS is not set
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_EXPORTENV is not set
+# CONFIG_CMD_IMPORTENV is not set
+# CONFIG_CMD_EDITENV is not set
+# CONFIG_CMD_SAVEENV is not set
+# CONFIG_CMD_ENV_EXISTS is not set
+# CONFIG_CMD_CRC32 is not set
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_CLK=y
+CONFIG_CMD_GPIO=y
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_MTD=y
+CONFIG_CMD_NAND=y
+CONFIG_CMD_WDT=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_CACHE=y
+# CONFIG_CMD_MISC is not set
+CONFIG_CMD_MTDPARTS=y
+CONFIG_CMD_UBI=y
+# CONFIG_CMD_UBIFS is not set
+CONFIG_DEFAULT_DEVICE_TREE="bcm96750ref1"
+# CONFIG_NET is not set
+CONFIG_CLK=y
+CONFIG_BCM6345_GPIO=y
+# CONFIG_INPUT is not set
+# CONFIG_MMC is not set
+CONFIG_MTD=y
+CONFIG_DM_MTD=y
+CONFIG_MTD_RAW_NAND=y
+CONFIG_NAND_BRCMNAND=y
+CONFIG_NAND_BRCMNAND_6750=y
+# CONFIG_RAM_ROCKCHIP_DEBUG is not set
+CONFIG_SPECIFY_CONSOLE_INDEX=y
+CONFIG_DM_SERIAL=y
+CONFIG_PL01X_SERIAL=y
+CONFIG_SYSRESET=y
+CONFIG_SYSRESET_WATCHDOG=y
+CONFIG_WDT_BCM6345=y
+CONFIG_REGEX=y
+# CONFIG_EFI_LOADER is not set
diff --git a/include/configs/broadcom_bcm96750ref1.h b/include/configs/broadcom_bcm96750ref1.h
new file mode 100644
index 0000000..fde4a5b
--- /dev/null
+++ b/include/configs/broadcom_bcm96750ref1.h
@@ -0,0 +1,40 @@ 
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2020 Philippe Reynes <philippe.reynes at softathome.com>
+ */
+
+#include <linux/sizes.h>
+
+/*
+ * common
+ */
+
+/* UART */
+#define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200, \
+					  230400, 500000, 1500000 }
+/* Memory usage */
+#define CONFIG_SYS_MAXARGS		24
+#define CONFIG_SYS_MALLOC_LEN		(1024 * 1024)
+
+/*
+ * 6750
+ */
+
+/* RAM */
+#define CONFIG_SYS_SDRAM_BASE		0x00000000
+
+/* U-Boot */
+#define CONFIG_SYS_INIT_SP_ADDR		(CONFIG_SYS_TEXT_BASE + SZ_16M)
+#define CONFIG_SYS_LOAD_ADDR		CONFIG_SYS_TEXT_BASE
+
+#define CONFIG_SKIP_LOWLEVEL_INIT
+
+#ifdef CONFIG_MTD_RAW_NAND
+#define CONFIG_SYS_MAX_NAND_DEVICE	1
+#define CONFIG_SYS_NAND_SELF_INIT
+#define CONFIG_SYS_NAND_ONFI_DETECTION
+#endif /* CONFIG_MTD_RAW_NAND */
+
+/*
+ * 96750ref1
+ */