riscv: Add SiPeed MAIXDUINO board device tree

Add the device tree sipeed_maixduino.dts for the SiPeed MAIXDUINO board.
This device tree enables LEDs and spi/mmc SD card device. Additionally,
gpios and i2c are also enabled and mapped to the board header pins as
indicated on the board itself.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
[Palmer: Remove undocumented microphone entry, along with the use.]
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

diff --git a/arch/riscv/boot/dts/canaan/sipeed_maixduino.dts b/arch/riscv/boot/dts/canaan/sipeed_maixduino.dts
new file mode 100644 (file)
index 0000000..cf605ba
--- /dev/null
+++ b/arch/riscv/boot/dts/canaan/sipeed_maixduino.dts
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019-20 Sean Anderson <seanga2@gmail.com>
+ * Copyright (C) 2020 Western Digital Corporation or its affiliates.
+ */
+
+/dts-v1/;
+
+#include "k210.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+       model = "SiPeed MAIXDUINO";
+       compatible = "sipeed,maixduino", "canaan,kendryte-k210";
+
+       chosen {
+               bootargs = "earlycon console=ttySIF0";
+               stdout-path = "serial0:115200n8";
+       };
+
+       gpio-keys {
+               compatible = "gpio-keys";
+
+               boot {
+                       label = "BOOT";
+                       linux,code = <BTN_0>;
+                       gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
+               };
+       };
+
+       vcc_3v3: regulator-3v3 {
+               compatible = "regulator-fixed";
+               regulator-name = "3v3";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+       };
+};
+
+&fpioa {
+       status = "okay";
+
+       uarths_pinctrl: uarths-pinmux {
+               pinmux = <K210_FPIOA(4, K210_PCF_UARTHS_RX)>, /* Header "0" */
+                        <K210_FPIOA(5, K210_PCF_UARTHS_TX)>; /* Header "1" */
+       };
+
+       gpio_pinctrl: gpio-pinmux {
+               pinmux = <K210_FPIOA(8, K210_PCF_GPIO0)>,
+                        <K210_FPIOA(9, K210_PCF_GPIO1)>;
+       };
+
+       gpiohs_pinctrl: gpiohs-pinmux {
+               pinmux = <K210_FPIOA(16, K210_PCF_GPIOHS0)>,  /* BOOT */
+                        <K210_FPIOA(21, K210_PCF_GPIOHS2)>,  /* Header "2" */
+                        <K210_FPIOA(22, K210_PCF_GPIOHS3)>,  /* Header "3" */
+                        <K210_FPIOA(23, K210_PCF_GPIOHS4)>,  /* Header "4" */
+                        <K210_FPIOA(24, K210_PCF_GPIOHS5)>,  /* Header "5" */
+                        <K210_FPIOA(32, K210_PCF_GPIOHS6)>,  /* Header "6" */
+                        <K210_FPIOA(15, K210_PCF_GPIOHS7)>,  /* Header "7" */
+                        <K210_FPIOA(14, K210_PCF_GPIOHS8)>,  /* Header "8" */
+                        <K210_FPIOA(13, K210_PCF_GPIOHS9)>,  /* Header "9" */
+                        <K210_FPIOA(12, K210_PCF_GPIOHS10)>, /* Header "10" */
+                        <K210_FPIOA(11, K210_PCF_GPIOHS11)>, /* Header "11" */
+                        <K210_FPIOA(10, K210_PCF_GPIOHS12)>, /* Header "12" */
+                        <K210_FPIOA(3,  K210_PCF_GPIOHS13)>; /* Header "13" */
+       };
+
+       i2s0_pinctrl: i2s0-pinmux {
+               pinmux = <K210_FPIOA(18, K210_PCF_I2S0_SCLK)>,
+                        <K210_FPIOA(19, K210_PCF_I2S0_WS)>,
+                        <K210_FPIOA(20, K210_PCF_I2S0_IN_D0)>;
+       };
+
+       spi1_pinctrl: spi1-pinmux {
+               pinmux = <K210_FPIOA(26, K210_PCF_SPI1_D1)>,
+                        <K210_FPIOA(27, K210_PCF_SPI1_SCLK)>,
+                        <K210_FPIOA(28, K210_PCF_SPI1_D0)>,
+                        <K210_FPIOA(29, K210_PCF_GPIO2)>; /* cs */
+       };
+
+       i2c1_pinctrl: i2c1-pinmux {
+               pinmux = <K210_FPIOA(30, K210_PCF_I2C1_SCLK)>, /* Header "scl" */
+                        <K210_FPIOA(31, K210_PCF_I2C1_SDA)>;  /* Header "sda" */
+       };
+
+       i2s1_pinctrl: i2s1-pinmux {
+               pinmux = <K210_FPIOA(33, K210_PCF_I2S1_WS)>,
+                        <K210_FPIOA(34, K210_PCF_I2S1_IN_D0)>,
+                        <K210_FPIOA(35, K210_PCF_I2S1_SCLK)>;
+       };
+
+       spi0_pinctrl: spi0-pinmux {
+               pinmux = <K210_FPIOA(36, K210_PCF_GPIOHS20)>,  /* cs */
+                        <K210_FPIOA(37, K210_PCF_GPIOHS21)>,  /* rst */
+                        <K210_FPIOA(38, K210_PCF_GPIOHS22)>,  /* dc */
+                        <K210_FPIOA(39, K210_PCF_SPI0_SCLK)>; /* wr */
+       };
+
+       dvp_pinctrl: dvp-pinmux {
+               pinmux = <K210_FPIOA(40, K210_PCF_SCCB_SDA)>,
+                        <K210_FPIOA(41, K210_PCF_SCCB_SCLK)>,
+                        <K210_FPIOA(42, K210_PCF_DVP_RST)>,
+                        <K210_FPIOA(43, K210_PCF_DVP_VSYNC)>,
+                        <K210_FPIOA(44, K210_PCF_DVP_PWDN)>,
+                        <K210_FPIOA(45, K210_PCF_DVP_HSYNC)>,
+                        <K210_FPIOA(46, K210_PCF_DVP_XCLK)>,
+                        <K210_FPIOA(47, K210_PCF_DVP_PCLK)>;
+       };
+};
+
+&uarths0 {
+       pinctrl-0 = <&uarths_pinctrl>;
+       pinctrl-names = "default";
+       status = "okay";
+};
+
+&gpio0 {
+       pinctrl-0 = <&gpiohs_pinctrl>;
+       pinctrl-names = "default";
+       status = "okay";
+};
+
+&gpio1 {
+       pinctrl-0 = <&gpio_pinctrl>;
+       pinctrl-names = "default";
+       status = "okay";
+};
+
+&i2s0 {
+       #sound-dai-cells = <1>;
+       pinctrl-0 = <&i2s0_pinctrl>;
+       pinctrl-names = "default";
+};
+
+&i2c1 {
+       pinctrl-0 = <&i2c1_pinctrl>;
+       pinctrl-names = "default";
+       clock-frequency = <400000>;
+       status = "okay";
+};
+
+&spi0 {
+       pinctrl-0 = <&spi0_pinctrl>;
+       pinctrl-names = "default";
+       num-cs = <1>;
+       cs-gpios = <&gpio0 20 GPIO_ACTIVE_HIGH>;
+
+       panel@0 {
+               compatible = "sitronix,st7789v";
+               reg = <0>;
+               reset-gpios = <&gpio0 21 GPIO_ACTIVE_LOW>;
+               dc-gpios = <&gpio0 22 0>;
+               spi-max-frequency = <15000000>;
+               power-supply = <&vcc_3v3>;
+       };
+};
+
+&spi1 {
+       pinctrl-0 = <&spi1_pinctrl>;
+       pinctrl-names = "default";
+       num-cs = <1>;
+       cs-gpios = <&gpio1_0 2 GPIO_ACTIVE_LOW>;
+       status = "okay";
+
+       slot@0 {
+               compatible = "mmc-spi-slot";
+               reg = <0>;
+               voltage-ranges = <3300 3300>;
+               spi-max-frequency = <25000000>;
+               broken-cd;
+       };
+};
+
+&spi3 {
+       spi-flash@0 {
+               compatible = "jedec,spi-nor";
+               reg = <0>;
+               spi-max-frequency = <50000000>;
+               m25p,fast-read;
+               broken-flash-reset;
+       };
+};