board: mediatek: add MT7988 reference boards

This patch adds general board files based on MT7988 SoCs.

MT7988 uses one mmc controller for booting from both SD and eMMC,
and the pins of mmc controller booting from SD are also shared with
one of spi controllers.
So two configs are need for these boot types:

1. mt7988_rfb_defconfig - SPI-NOR, SPI-NAND and eMMC
2. mt7988_sd_rfb_defconfig - SPI-NAND and SD

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>

3 files changed, 318 insertions, 0 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index e66c32e2689..8f43dba5863 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1341,6 +1341,8 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += \
 	mt7986b-sd-rfb.dtb \
 	mt7986a-emmc-rfb.dtb \
 	mt7986b-emmc-rfb.dtb \
+	mt7988-rfb.dtb \
+	mt7988-sd-rfb.dtb \
 	mt8183-pumpkin.dtb \
 	mt8512-bm1-emmc.dtb \
 	mt8516-pumpkin.dtb \
diff --git a/arch/arm/dts/mt7988-rfb.dts b/arch/arm/dts/mt7988-rfb.dts
new file mode 100644
index 00000000000..2c114284309
--- /dev/null
+++ b/arch/arm/dts/mt7988-rfb.dts
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Sam Shih <sam.shih@mediatek.com>
+ */
+
+/dts-v1/;
+#include "mt7988.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	model = "mt7988-rfb";
+	compatible = "mediatek,mt7988-rfb";
+
+	chosen {
+		stdout-path = &uart0;
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0 0x40000000 0 0x10000000>;
+	};
+
+	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;
+	};
+
+	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;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	status = "okay";
+};
+
+&eth {
+	status = "okay";
+	mediatek,gmac-id = <0>;
+	phy-mode = "usxgmii";
+	mediatek,switch = "mt7988";
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+		pause;
+	};
+};
+
+&pinctrl {
+	i2c1_pins: i2c1-pins {
+		mux {
+			function = "i2c";
+			groups = "i2c1_0";
+		};
+	};
+
+	pwm_pins: pwm-pins {
+		mux {
+			function = "pwm";
+			groups = "pwm0", "pwm1", "pwm2", "pwm3", "pwm4",
+				 "pwm5", "pwm6", "pwm7";
+		};
+	};
+
+	spi0_pins: spi0-pins {
+		mux {
+			function = "spi";
+			groups = "spi0", "spi0_wp_hold";
+		};
+	};
+
+	spi2_pins: spi2-pins {
+		mux {
+			function = "spi";
+			groups = "spi2", "spi2_wp_hold";
+		};
+	};
+
+	mmc0_pins_default: mmc0default {
+		mux {
+			function = "flash";
+			groups =  "emmc_51";
+		};
+
+		conf-cmd-dat {
+			pins = "EMMC_DATA_0", "EMMC_DATA_1", "EMMC_DATA_2",
+			       "EMMC_DATA_3", "EMMC_DATA_4", "EMMC_DATA_5",
+			       "EMMC_DATA_6", "EMMC_DATA_7", "EMMC_CMD";
+			input-enable;
+		};
+
+		conf-clk {
+			pins = "EMMC_CK";
+		};
+
+		conf-dsl {
+			pins = "EMMC_DSL";
+		};
+
+		conf-rst {
+			pins = "EMMC_RSTB";
+		};
+	};
+};
+
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm_pins>;
+	status = "okay";
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_pins>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	must_tx;
+	enhance_timing;
+	dma_ext;
+	ipm_design;
+	support_quad;
+	tick_dly = <2>;
+	sample_sel = <0>;
+
+	spi_nand@0 {
+		compatible = "spi-nand";
+		reg = <0>;
+		spi-max-frequency = <52000000>;
+	};
+};
+
+&spi2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi2_pins>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	must_tx;
+	enhance_timing;
+	dma_ext;
+	ipm_design;
+	support_quad;
+	tick_dly = <2>;
+	sample_sel = <0>;
+
+	spi_nor@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <52000000>;
+	};
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins_default>;
+	max-frequency = <52000000>;
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	cap-mmc-hw-reset;
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_1p8v>;
+	non-removable;
+	status = "okay";
+};
diff --git a/arch/arm/dts/mt7988-sd-rfb.dts b/arch/arm/dts/mt7988-sd-rfb.dts
new file mode 100644
index 00000000000..a3df37d252d
--- /dev/null
+++ b/arch/arm/dts/mt7988-sd-rfb.dts
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Sam Shih <sam.shih@mediatek.com>
+ */
+
+/dts-v1/;
+#include "mt7988.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	model = "mt7988-rfb";
+	compatible = "mediatek,mt7988-rfb", "mediatek,mt7988-sd-rfb";
+
+	chosen {
+		stdout-path = &uart0;
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0 0x40000000 0 0x10000000>;
+	};
+
+	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;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	status = "okay";
+};
+
+&eth {
+	status = "okay";
+	mediatek,gmac-id = <0>;
+	phy-mode = "usxgmii";
+	mediatek,switch = "mt7988";
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+		pause;
+	};
+};
+
+&pinctrl {
+	i2c1_pins: i2c1-pins {
+		mux {
+			function = "i2c";
+			groups = "i2c1_0";
+		};
+	};
+
+	pwm_pins: pwm-pins {
+		mux {
+			function = "pwm";
+			groups = "pwm0", "pwm1", "pwm2", "pwm3", "pwm4",
+				 "pwm5", "pwm6", "pwm7";
+		};
+	};
+
+	spi0_pins: spi0-pins {
+		mux {
+			function = "spi";
+			groups = "spi0", "spi0_wp_hold";
+		};
+	};
+
+	mmc1_pins_default: mmc1default {
+		mux {
+			function = "flash";
+			groups =  "emmc_45";
+		};
+
+		conf-cmd-dat {
+			pins = "SPI2_CSB", "SPI2_MISO", "SPI2_MOSI",
+			       "SPI2_CLK", "SPI2_HOLD";
+			input-enable;
+		};
+
+		conf-clk {
+			pins = "SPI2_WP";
+		};
+	};
+};
+
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm_pins>;
+	status = "okay";
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_pins>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	must_tx;
+	enhance_timing;
+	dma_ext;
+	ipm_design;
+	support_quad;
+	tick_dly = <2>;
+	sample_sel = <0>;
+
+	spi_nand@0 {
+		compatible = "spi-nand";
+		reg = <0>;
+		spi-max-frequency = <52000000>;
+	};
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc1_pins_default>;
+	max-frequency = <52000000>;
+	bus-width = <4>;
+	cap-sd-highspeed;
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_3p3v>;
+	status = "okay";
+};