rockchip: add NanoPi R2S support

Hardware
--------
RockChip RK3328 ARM64 (4 cores)
1GB DDR4 RAM
2x 1000 Base-T
3 LEDs (LAN / WAN / SYS)
1 Button (Reset)
Micro-SD slot
USB 2.0 Port

Installation
------------
Uncompress the OpenWrt sysupgrade and write it to a micro SD card using
dd.

MAC-address
-----------
The vendor code supports reading a MAC address from an EEPROM connected
via i2c0 of the SoC. The EEPROM (address 0x51) should contain the MAC
address in binary at offset 0xfa. However, my two units didn't come with
such an EEPROM soldered on. The EEPROM should be placed between the SoC
and the GPIO pins on the board. (U10)

Generating rendom MAC addresses works around this issue. Otherwise, all
boards running the same image have identical MAC addresses.

Signed-off-by: David Bauer <mail@david-bauer.net>

1 files changed, 370 insertions, 0 deletions

diff --git a/target/linux/rockchip/patches-5.4/001-rockchip-rk3328-Add-support-for-FriendlyARM-NanoPi-R.patch b/target/linux/rockchip/patches-5.4/001-rockchip-rk3328-Add-support-for-FriendlyARM-NanoPi-R.patch
new file mode 100644
index 0000000000..904a2f31b6
--- /dev/null
+++ b/target/linux/rockchip/patches-5.4/001-rockchip-rk3328-Add-support-for-FriendlyARM-NanoPi-R.patch
@@ -0,0 +1,370 @@
+From 749cbb7b1a4bc2244b6af8cd7d8b471d4e33c80f Mon Sep 17 00:00:00 2001
+From: David Bauer <mail@david-bauer.net>
+Date: Fri, 10 Jul 2020 15:57:46 +0200
+Subject: [PATCH] rockchip: rk3328: Add support for FriendlyARM NanoPi R2S
+
+This adds support for the NanoPi R2S from FriendlyARM.
+
+Rockchip RK3328 SoC
+1GB DDR4 RAM
+Gigabit Ethernet (WAN)
+Gigabit Ethernet (USB3) (LAN)
+USB 2.0 Host Port
+MicroSD slot
+Reset button
+WAN - LAN - SYS LED
+
+Signed-off-by: David Bauer <mail@david-bauer.net>
+---
+ arch/arm64/boot/dts/rockchip/Makefile         |   1 +
+ .../boot/dts/rockchip/rk3328-nanopi-r2s.dts   | 334 ++++++++++++++++++
+ 2 files changed, 335 insertions(+)
+ create mode 100644 arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts
+
+--- a/arch/arm64/boot/dts/rockchip/Makefile
++++ b/arch/arm64/boot/dts/rockchip/Makefile
+@@ -1,6 +1,7 @@
+ # SPDX-License-Identifier: GPL-2.0
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-evb.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-evb.dtb
++dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-nanopi-r2s.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-rock64.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-roc-cc.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3368-evb-act8846.dtb
+--- /dev/null
++++ b/arch/arm64/boot/dts/rockchip/rk3328-nanopi-r2s.dts
+@@ -0,0 +1,334 @@
++// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
++/*
++ * Copyright (c) 2020 David Bauer <mail@david-bauer.net>
++ */
++
++/dts-v1/;
++
++#include <dt-bindings/input/input.h>
++#include <dt-bindings/gpio/gpio.h>
++#include "rk3328.dtsi"
++
++/ {
++	model = "FriendlyARM NanoPi R2S";
++	compatible = "friendlyarm,nanopi-r2s", "rockchip,rk3328";
++
++	chosen {
++		stdout-path = "serial2:1500000n8";
++	};
++
++	gmac_clkin: external-gmac-clock {
++		compatible = "fixed-clock";
++		clock-frequency = <125000000>;
++		clock-output-names = "gmac_clkin";
++		#clock-cells = <0>;
++	};
++
++	vcc_sd: sdmmc-regulator {
++		compatible = "regulator-fixed";
++		gpio = <&gpio0 RK_PD6 GPIO_ACTIVE_LOW>;
++		pinctrl-names = "default";
++		pinctrl-0 = <&sdmmc0m1_gpio>;
++		regulator-name = "vcc_sd";
++		regulator-min-microvolt = <3300000>;
++		regulator-max-microvolt = <3300000>;
++		vin-supply = <&vcc_io>;
++	};
++
++	vcc_sdio: sdmmcio-regulator {
++		compatible = "regulator-gpio";
++		gpios = <&gpio1 RK_PD4 GPIO_ACTIVE_HIGH>;
++		enable-active-high;
++		states = <1800000 0x1
++			  3300000 0x0>;
++		pinctrl-names = "default";
++		pinctrl-0 = <&sdio_vcc_pin>;
++		regulator-always-on;
++		regulator-min-microvolt = <1800000>;
++		regulator-max-microvolt = <3300000>;
++		regulator-name = "vcc_sdio";
++		regulator-settling-time-us = <5000>;
++		regulator-type = "voltage";
++		vin-supply = <&vcc_io>;
++	};
++
++	vcc_sys: vcc-sys {
++		compatible = "regulator-fixed";
++		regulator-name = "vcc_sys";
++		regulator-always-on;
++		regulator-boot-on;
++		regulator-min-microvolt = <5000000>;
++		regulator-max-microvolt = <5000000>;
++	};
++
++	leds {
++		compatible = "gpio-leds";
++
++		pinctrl-names = "default";
++		pinctrl-0 = <&led_pins>;
++
++		sys {
++			gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_HIGH>;
++			label = "nanopi-r2s:red:sys";
++		};
++
++		lan {
++			gpios = <&gpio2 RK_PB7 GPIO_ACTIVE_HIGH>;
++			label = "nanopi-r2s:green:lan";
++		};
++
++		wan {
++			gpios = <&gpio2 RK_PC2 GPIO_ACTIVE_HIGH>;
++			label = "nanopi-r2s:green:wan";
++		};
++	};
++
++	gpio_keys {
++		compatible = "gpio-keys-polled";
++		poll-interval = <100>;
++
++		pinctrl-names = "default";
++		pinctrl-0 = <&button_pins>;
++
++		reset {
++			label = "Reset Button";
++			gpios = <&gpio0 RK_PA0 GPIO_ACTIVE_LOW>;
++			linux,code = <KEY_RESTART>;
++			debounce-interval = <50>;
++		};
++	};
++};
++
++&cpu0 {
++	cpu-supply = <&vdd_arm>;
++};
++
++&cpu1 {
++	cpu-supply = <&vdd_arm>;
++};
++
++&cpu2 {
++	cpu-supply = <&vdd_arm>;
++};
++
++&cpu3 {
++	cpu-supply = <&vdd_arm>;
++};
++
++&gmac2io {
++	assigned-clocks = <&cru SCLK_MAC2IO>, <&cru SCLK_MAC2IO_EXT>;
++	assigned-clock-parents = <&gmac_clkin>, <&gmac_clkin>;
++	clock_in_out = "input";
++	phy-supply = <&vcc_io>;
++	phy-handle = <&rtl8211e>;
++	phy-mode = "rgmii";
++	pinctrl-names = "default";
++	pinctrl-0 = <&rgmiim1_pins>;
++	snps,aal;
++	snps,reset-gpio = <&gpio1 RK_PC2 GPIO_ACTIVE_LOW>;
++	snps,reset-active-low;
++	snps,reset-delays-us = <0 10000 50000>;
++	tx_delay = <0x24>;
++	rx_delay = <0x18>;
++	status = "okay";
++
++	mdio {
++		compatible = "snps,dwmac-mdio";
++		#address-cells = <1>;
++		#size-cells = <0>;
++
++		rtl8211e: ethernet-phy@0 {
++			reg = <0>;
++		};
++	};
++};
++
++&i2c1 {
++	status = "okay";
++
++	rk805: rk805@18 {
++		compatible = "rockchip,rk805";
++		reg = <0x18>;
++		interrupt-parent = <&gpio2>;
++		interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
++		#clock-cells = <1>;
++		clock-output-names = "xin32k", "rk805-clkout2";
++		gpio-controller;
++		#gpio-cells = <2>;
++		pinctrl-names = "default";
++		pinctrl-0 = <&pmic_int_l>;
++		rockchip,system-power-controller;
++		wakeup-source;
++
++		vcc1-supply = <&vcc_sys>;
++		vcc2-supply = <&vcc_sys>;
++		vcc3-supply = <&vcc_sys>;
++		vcc4-supply = <&vcc_sys>;
++		vcc5-supply = <&vcc_io>;
++		vcc6-supply = <&vcc_sys>;
++
++		regulators {
++			vdd_logic: DCDC_REG1 {
++				regulator-name = "vdd_logic";
++				regulator-min-microvolt = <712500>;
++				regulator-max-microvolt = <1450000>;
++				regulator-ramp-delay = <12500>;
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-state-mem {
++					regulator-on-in-suspend;
++					regulator-suspend-microvolt = <1000000>;
++				};
++			};
++
++			vdd_arm: DCDC_REG2 {
++				regulator-name = "vdd_arm";
++				regulator-min-microvolt = <712500>;
++				regulator-max-microvolt = <1450000>;
++				regulator-ramp-delay = <12500>;
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-state-mem {
++					regulator-on-in-suspend;
++					regulator-suspend-microvolt = <950000>;
++				};
++			};
++
++			vcc_ddr: DCDC_REG3 {
++				regulator-name = "vcc_ddr";
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-state-mem {
++					regulator-on-in-suspend;
++				};
++			};
++
++			vcc_io: DCDC_REG4 {
++				regulator-name = "vcc_io";
++				regulator-min-microvolt = <3300000>;
++				regulator-max-microvolt = <3300000>;
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-state-mem {
++					regulator-on-in-suspend;
++					regulator-suspend-microvolt = <3300000>;
++				};
++			};
++
++			vcc_18: LDO_REG1 {
++				regulator-name = "vcc_18";
++				regulator-min-microvolt = <1800000>;
++				regulator-max-microvolt = <1800000>;
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-state-mem {
++					regulator-on-in-suspend;
++					regulator-suspend-microvolt = <1800000>;
++				};
++			};
++
++			vcc18_emmc: LDO_REG2 {
++				regulator-name = "vcc18_emmc";
++				regulator-min-microvolt = <1800000>;
++				regulator-max-microvolt = <1800000>;
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-state-mem {
++					regulator-on-in-suspend;
++					regulator-suspend-microvolt = <1800000>;
++				};
++			};
++
++			vdd_10: LDO_REG3 {
++				regulator-name = "vdd_10";
++				regulator-min-microvolt = <1000000>;
++				regulator-max-microvolt = <1000000>;
++				regulator-always-on;
++				regulator-boot-on;
++				regulator-state-mem {
++					regulator-on-in-suspend;
++					regulator-suspend-microvolt = <1000000>;
++				};
++			};
++		};
++	};
++};
++
++&io_domains {
++	status = "okay";
++
++	vccio1-supply = <&vcc_io>;
++	vccio2-supply = <&vcc18_emmc>;
++	vccio3-supply = <&vcc_sdio>;
++	vccio4-supply = <&vcc_18>;
++	vccio5-supply = <&vcc_io>;
++	vccio6-supply = <&vcc_io>;
++	pmuio-supply = <&vcc_io>;
++};
++
++&pinctrl {
++	leds {
++		led_pins: led-pins {
++			rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>,
++							<2 RK_PB7 RK_FUNC_GPIO &pcfg_pull_none>,
++							<2 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
++		};
++	};
++
++	button {
++		button_pins: button-pins {
++			rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_none>;
++		};
++	};
++
++	pmic {
++		pmic_int_l: pmic-int-l {
++			rockchip,pins = <2 RK_PA6 RK_FUNC_GPIO &pcfg_pull_up>;
++		};
++	};
++
++	sd {
++		sdio_vcc_pin: sdio-vcc-pin {
++			rockchip,pins = <1 RK_PD4 RK_FUNC_GPIO &pcfg_pull_up>;
++		};
++	};
++};
++
++&sdmmc {
++	bus-width = <4>;
++	cap-mmc-highspeed;
++	cap-sd-highspeed;
++	disable-wp;
++	max-frequency = <150000000>;
++	pinctrl-names = "default";
++	pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>;
++	vmmc-supply = <&vcc_sd>;
++	vqmmc-supply = <&vcc_sdio>;
++	status = "okay";
++};
++
++&tsadc {
++	rockchip,hw-tshut-mode = <0>;
++	rockchip,hw-tshut-polarity = <0>;
++	status = "okay";
++};
++
++&uart2 {
++	status = "okay";
++};
++
++&u2phy {
++	status = "okay";
++
++	u2phy_host: host-port {
++		status = "okay";
++	};
++};
++
++&usb_host0_ehci {
++	status = "okay";
++};
++
++&usb_host0_ohci {
++	status = "okay";
++};