board: mediatek: add MT7986 reference boards

Add general board files based on MT7986 SoCs.

MT7986 uses one mmc controller for booting from both SD and eMMC.
Both MT7986A and MT7986B use the same pins for spi controller.

Configs for various boot types:
1. mt7986_rfb_defconfig - SPI-NOR and SPI-NAND for MT7986A/B
2. mt7986a_bpir3_emmc_defconfig - eMMC for MT7986A only
3. mt7986a_bpir3_sd_defconfig - SD for MT7986A only

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>

1 files changed, 218 insertions, 0 deletions

diff --git a/arch/arm/dts/mt7986a-rfb.dts b/arch/arm/dts/mt7986a-rfb.dts
new file mode 100644
index 00000000000..80def57e1a1
--- /dev/null
+++ b/arch/arm/dts/mt7986a-rfb.dts
@@ -0,0 +1,218 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Sam Shih <sam.shih@mediatek.com>
+ */
+
+/dts-v1/;
+#include "mt7986.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	model = "mt7986-rfb";
+	compatible = "mediatek,mt7986", "mediatek,mt7986-rfb";
+	chosen {
+		stdout-path = &uart0;
+		tick-timer = &timer0;
+	};
+
+	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;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_pins>;
+	status = "disabled";
+};
+
+&eth {
+	status = "okay";
+	mediatek,gmac-id = <0>;
+	phy-mode = "sgmii";
+	mediatek,switch = "mt7531";
+	reset-gpios = <&gpio 5 GPIO_ACTIVE_HIGH>;
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+};
+
+&pinctrl {
+	spi_flash_pins: spi0-pins-func-1 {
+		mux {
+			function = "flash";
+			groups = "spi0", "spi0_wp_hold";
+		};
+
+		conf-pu {
+			pins = "SPI2_CS", "SPI2_HOLD", "SPI2_WP";
+			drive-strength = <MTK_DRIVE_8mA>;
+			bias-pull-up = <MTK_PUPD_SET_R1R0_11>;
+		};
+
+		conf-pd {
+			pins = "SPI2_CLK", "SPI2_MOSI", "SPI2_MISO";
+			drive-strength = <MTK_DRIVE_8mA>;
+			bias-pull-down = <MTK_PUPD_SET_R1R0_11>;
+		};
+	};
+
+	snfi_pins: snfi-pins-func-1 {
+		mux {
+			function = "flash";
+			groups = "snfi";
+		};
+
+		clk {
+			pins = "SPI0_CLK";
+			drive-strength = <MTK_DRIVE_8mA>;
+			bias-pull-down = <MTK_PUPD_SET_R1R0_00>;
+		};
+
+		conf-pu {
+			pins = "SPI0_CS", "SPI0_HOLD", "SPI0_WP";
+			drive-strength = <MTK_DRIVE_6mA>;
+			bias-pull-up = <MTK_PUPD_SET_R1R0_00>;
+		};
+
+		conf-pd {
+			pins = "SPI0_MOSI", "SPI0_MISO";
+			drive-strength = <MTK_DRIVE_6mA>;
+			bias-pull-down = <MTK_PUPD_SET_R1R0_00>;
+		};
+	};
+
+	spic_pins: spi1-pins-func-1 {
+		mux {
+			function = "spi";
+			groups = "spi1_2";
+		};
+	};
+
+	uart1_pins: spi1-pins-func-3 {
+		mux {
+			function = "uart";
+			groups = "uart1_2";
+		};
+	};
+
+	pwm_pins: pwm0-pins-func-1 {
+		mux {
+			function = "pwm";
+			groups = "pwm0";
+		};
+	};
+
+	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;
+			drive-strength = <MTK_DRIVE_4mA>;
+			bias-pull-up = <MTK_PUPD_SET_R1R0_01>;
+		};
+
+		conf-clk {
+			pins = "EMMC_CK";
+			drive-strength = <MTK_DRIVE_6mA>;
+			bias-pull-down = <MTK_PUPD_SET_R1R0_10>;
+		};
+
+		conf-dsl {
+			pins = "EMMC_DSL";
+			bias-pull-down = <MTK_PUPD_SET_R1R0_10>;
+		};
+
+		conf-rst {
+			pins = "EMMC_RSTB";
+			drive-strength = <MTK_DRIVE_4mA>;
+			bias-pull-up = <MTK_PUPD_SET_R1R0_01>;
+		};
+	};
+};
+
+&snand {
+	pinctrl-names = "default";
+	pinctrl-0 = <&snfi_pins>;
+	status = "okay";
+	quad-spi;
+};
+
+&spi0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi_flash_pins>;
+	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>;
+	};
+
+	spi_nand@1 {
+		compatible = "spi-nand";
+		reg = <1>;
+		spi-max-frequency = <52000000>;
+	};
+};
+
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm_pins>;
+	status = "okay";
+};
+
+&watchdog {
+	status = "disabled";
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins_default>;
+	bus-width = <8>;
+	max-frequency = <52000000>;
+	cap-mmc-highspeed;
+	cap-mmc-hw-reset;
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_1p8v>;
+	non-removable;
+	status = "okay";
+};