[U-Boot] [PATCH v2 6/7] MSCC: add board support for the Luton based evaluation board

[Gregory CLEMENT <gregory.clement@bootlin.com>]

Adding the support for the Luton boards PCB91 which share common code with
the Ocelots boards, including board code, device tree and configuration.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
---
 arch/mips/dts/luton_pcb091.dts | 36 ++++++++++++++
 arch/mips/dts/mscc,luton.dtsi  | 87 ++++++++++++++++++++++++++++++++++
 arch/mips/mach-mscc/Kconfig    |  2 +
 board/mscc/luton/Kconfig       | 14 ++++++
 board/mscc/luton/Makefile      |  3 ++
 board/mscc/luton/luton.c       | 28 +++++++++++
 configs/mscc_luton_defconfig   | 66 ++++++++++++++++++++++++++
 7 files changed, 236 insertions(+)
 create mode 100644 arch/mips/dts/luton_pcb091.dts
 create mode 100644 arch/mips/dts/mscc,luton.dtsi
 create mode 100644 board/mscc/luton/Kconfig
 create mode 100644 board/mscc/luton/Makefile
 create mode 100644 board/mscc/luton/luton.c
 create mode 100644 configs/mscc_luton_defconfig

diff --git a/arch/mips/dts/luton_pcb091.dts b/arch/mips/dts/luton_pcb091.dts
new file mode 100644
index 0000000000..b5e0df8d04
--- /dev/null
+++ b/arch/mips/dts/luton_pcb091.dts
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2018 Microsemi Corporation
+ */
+
+/dts-v1/;
+#include "mscc,luton.dtsi"
+
+/ {
+	model = "Luton PCB091 Reference Board";
+	compatible = "mscc,luton-pcb091", "mscc,luton";
+
+	aliases {
+		serial0 = &uart0;
+		spi0 = &spi0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+	spi-flash at 0 {
+		compatible = "spi-flash";
+                spi-max-frequency = <18000000>; /* input clock */
+                reg = <0>; /* CS0 */
+	};
+};
+
diff --git a/arch/mips/dts/mscc,luton.dtsi b/arch/mips/dts/mscc,luton.dtsi
new file mode 100644
index 0000000000..6a4ad2a5be
--- /dev/null
+++ b/arch/mips/dts/mscc,luton.dtsi
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2018 Microsemi Corporation
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "mscc,luton";
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu at 0 {
+			compatible = "mips,mips24KEc";
+			device_type = "cpu";
+			reg = <0>;
+		};
+	};
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	ahb_clk: ahb-clk {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <208333333>;
+	};
+
+	ahb {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x60000000 0x10200000>;
+
+		uart0: serial at 10100000 {
+			pinctrl-0 = <&uart_pins>;
+			pinctrl-names = "default";
+
+			compatible = "ns16550a";
+			reg = <0x10100000 0x20>;
+			clocks = <&ahb_clk>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+
+			status = "disabled";
+		};
+
+		gpio: pinctrl at 70068 {
+			compatible = "mscc,luton-pinctrl";
+			reg = <0x70068 0x68>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			gpio-ranges = <&gpio 0 0 32>;
+
+			uart_pins: uart-pins {
+				pins = "GPIO_30", "GPIO_31";
+				function = "uart";
+			};
+
+		};
+
+		gpio_spi_bitbang: gpio at 10000064 {
+			compatible = "mscc,spi-bitbang-gpio";
+			reg = <0x10000064 0x4>;
+			gpio-controller;
+			#gpio-cells = <2>;
+
+		};
+
+		spi0: spi-bitbang {
+			compatible = "spi-gpio";
+			status = "okay";
+			gpio-sck = <&gpio_spi_bitbang 6 0>;
+			gpio-miso = <&gpio_spi_bitbang 0 0>;
+			gpio-mosi = <&gpio_spi_bitbang 5 0>;
+			cs-gpios = <&gpio_spi_bitbang 1 0>;
+			num-chipselects = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+};
diff --git a/arch/mips/mach-mscc/Kconfig b/arch/mips/mach-mscc/Kconfig
index fc806fc1f3..0e35b77c9d 100644
--- a/arch/mips/mach-mscc/Kconfig
+++ b/arch/mips/mach-mscc/Kconfig
@@ -81,4 +81,6 @@ endchoice
 
 source "board/mscc/ocelot/Kconfig"
 
+source "board/mscc/luton/Kconfig"
+
 endmenu
diff --git a/board/mscc/luton/Kconfig b/board/mscc/luton/Kconfig
new file mode 100644
index 0000000000..e1199808d5
--- /dev/null
+++ b/board/mscc/luton/Kconfig
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+if SOC_LUTON
+
+config SYS_VENDOR
+	default "mscc"
+
+config SYS_BOARD
+	default "luton"
+
+config SYS_CONFIG_NAME
+	default "luton"
+
+endif
diff --git a/board/mscc/luton/Makefile b/board/mscc/luton/Makefile
new file mode 100644
index 0000000000..b27f7c7739
--- /dev/null
+++ b/board/mscc/luton/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+obj-$(CONFIG_SOC_LUTON)	:= luton.o
diff --git a/board/mscc/luton/luton.c b/board/mscc/luton/luton.c
new file mode 100644
index 0000000000..6be55d4c46
--- /dev/null
+++ b/board/mscc/luton/luton.c
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2018 Microsemi Corporation
+ */
+
+#include <common.h>
+#include <asm/io.h>
+
+#define MSCC_GPIO_ALT0		0x88
+#define MSCC_GPIO_ALT1		0x8C
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void board_debug_uart_init(void)
+{
+	/* too early for the pinctrl driver, so configure the UART pins here */
+	setbits_le32(REG_GCB(MSCC_GPIO_ALT0), BIT(30) | BIT(31));
+}
+
+int board_early_init_r(void)
+{
+	/* Prepare SPI controller to be used in master mode */
+	writel(0, REG_CFG(ICPU_SW_MODE));
+
+	/* Address of boot parameters */
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE;
+	return 0;
+}
diff --git a/configs/mscc_luton_defconfig b/configs/mscc_luton_defconfig
new file mode 100644
index 0000000000..47fe12b6ee
--- /dev/null
+++ b/configs/mscc_luton_defconfig
@@ -0,0 +1,66 @@
+CONFIG_MIPS=y
+CONFIG_SYS_TEXT_BASE=0x40000000
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_DEBUG_UART_BOARD_INIT=y
+CONFIG_DEBUG_UART_BASE=0x70100000
+CONFIG_DEBUG_UART_CLOCK=208333333
+CONFIG_ARCH_MSCC=y
+CONFIG_TARGET_LUTON_PCB091=y
+CONFIG_DDRTYPE_MT47H128M8HQ=y
+CONFIG_SYS_LITTLE_ENDIAN=y
+CONFIG_MIPS_BOOT_FDT=y
+CONFIG_DEFAULT_DEVICE_TREE="luton_pcb091"
+CONFIG_DEBUG_UART=y
+CONFIG_FIT=y
+CONFIG_BOOTDELAY=3
+CONFIG_USE_BOOTARGS=y
+CONFIG_BOOTARGS="console=ttyS0,115200"
+CONFIG_LOGLEVEL=7
+CONFIG_DISPLAY_CPUINFO=y
+CONFIG_SYS_PROMPT="pcb091 # "
+# CONFIG_CMD_BDI is not set
+# CONFIG_CMD_CONSOLE is not set
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_EXPORTENV is not set
+# CONFIG_CMD_IMPORTENV is not set
+# CONFIG_CMD_CRC32 is not set
+CONFIG_CMD_MD5SUM=y
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_MEMTEST=y
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_DHCP=y
+# CONFIG_NET_TFTP_VARS is not set
+# CONFIG_CMD_NFS is not set
+CONFIG_CMD_PING=y
+CONFIG_CMD_MTDPARTS=y
+CONFIG_MTDIDS_DEFAULT="nor0=spi_flash"
+CONFIG_MTDPARTS_DEFAULT="mtdparts=spi_flash:512k(UBoot),256k(Env),256k(conf),6m at 1m(linux)"
+# CONFIG_ISO_PARTITION is not set
+CONFIG_OF_EMBED=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_CLK=y
+CONFIG_DM_GPIO=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_DM_ETH=y
+CONFIG_PINCTRL=y
+CONFIG_PINCONF=y
+CONFIG_DM_SERIAL=y
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_DM_SPI=y
+CONFIG_SOFT_SPI=y
+CONFIG_LZMA=y
+CONFIG_XZ=y
-- 
2.19.1