board: mediatek: Add pumpkin board support

The pumpkin board is made by Gossamer Engineering and is using
a MediaTek SoC. The board currently comes in two available version:
MT8516 SoC and MT8167 SoC.
The board provides the following IOs: eMMC, NAND, SD card, USB type-A,
Ethernet, Wi-Fi, Bluetooth, Audio (jack out, 2 PDM port, 1 analog in),
serial over USB, and an expansion header.

Additionally there is a HDMI port, DSI port, and camera port only
on the MT8167 version of the board.

The board can be powered by battery and/or via a USB Type-C port and
is using a PMIC MT6392.

The eMMC and NAND are sharing pins and cannot be used together.

This commit is adding the basic boot support for the Pumpkin MT8516
board on the eMMC.

Signed-off-by: Fabien Parent <fparent@baylibre.com>

3 files changed, 113 insertions, 1 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 49d1fae..b437f75 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -778,7 +778,8 @@ dtb-$(CONFIG_SOC_K3_J721E) += k3-j721e-common-proc-board.dtb \
 
 dtb-$(CONFIG_ARCH_MEDIATEK) += \
 	mt7623n-bananapi-bpi-r2.dtb \
-	mt7629-rfb.dtb
+	mt7629-rfb.dtb \
+	mt8516-pumpkin.dtb
 
 dtb-$(CONFIG_TARGET_GE_BX50V3) += imx6q-bx50v3.dtb
 dtb-$(CONFIG_TARGET_MX53PPD) += imx53-ppd.dtb
diff --git a/arch/arm/dts/mt8516-pumpkin.dts b/arch/arm/dts/mt8516-pumpkin.dts
new file mode 100644
index 0000000..cd43c1f
--- /dev/null
+++ b/arch/arm/dts/mt8516-pumpkin.dts
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2019 BayLibre SAS.
+ * Author: Fabien Parent <fparent@baylibre.com>
+ */
+
+/dts-v1/;
+
+#include <config.h>
+#include "mt8516.dtsi"
+
+/ {
+	model = "Pumpkin MT8516";
+
+	chosen {
+		stdout-path = &uart0;
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0x40000000 0x20000000>;
+	};
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+
+		/* 128 KiB reserved for ARM Trusted Firmware (BL31) */
+		bl31_secmon_reserved: secmon@43000000 {
+			no-map;
+			reg = <0 0x43000000 0 0x20000>;
+		};
+	};
+
+	reg_1p8v: regulator-1p8v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-1.8V";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_3p3v: regulator-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins_default>;
+	bus-width = <4>;
+	max-frequency = <200000000>;
+	cap-mmc-highspeed;
+	mmc-hs200-1_8v;
+	cap-mmc-hw-reset;
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_1p8v>;
+	non-removable;
+	status = "okay";
+};
+
+&pinctrl {
+	mmc0_pins_default: mmc0default {
+		mux {
+			function = "msdc";
+			groups =  "msdc0";
+		};
+
+		conf-cmd-data {
+			pins = "MSDC0_CMD", "MSDC0_DAT0", "MSDC0_DAT1",
+			       "MSDC0_DAT2", "MSDC0_DAT3", "MSDC0_DAT4",
+			       "MSDC0_DAT5", "MSDC0_DAT6", "MSDC0_DAT7";
+			input-enable;
+			bias-pull-up;
+		};
+
+		conf-clk {
+			pins = "MSDC0_CLK";
+			bias-pull-down;
+		};
+
+		conf-rst {
+			pins = "MSDC0_RSTB";
+			bias-pull-up;
+		};
+	};
+
+	uart0_pins: uart0 {
+		mux {
+			function = "uart";
+			groups = "uart0_0_rxd_txd";
+		};
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins>;
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};
diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig
index 60aef15..25ef765 100644
--- a/arch/arm/mach-mediatek/Kconfig
+++ b/arch/arm/mach-mediatek/Kconfig
@@ -42,5 +42,6 @@ endchoice
 
 source "board/mediatek/mt7623/Kconfig"
 source "board/mediatek/mt7629/Kconfig"
+source "board/mediatek/pumpkin/Kconfig"
 
 endif