ath79: add support for Letv LBA-047-CH

Specifications:
SOC: QCA9531 650 MHz
ROM: 16 MiB Flash (Winbond W25Q128FV)
RAM: 128 MiB DDR2 (Winbond W971GG6SB)
LAN: 10/100M *2
WAN: 10/100M *1
LED: BGR color *1

Mac address:
label	C8:0E:77:xx:xx:68	art@0x0
lan	C8:0E:77:xx:xx:62	art@0x6
wan	C8:0E:77:xx:xx:68	art@0x0    (same as the label)
wlan	C8:0E:77:xx:xx:B2	art@0x1002 (load automatically)

TFTP installation:
* Set local IP to 192.168.67.100 and open tftpd64, link lan
  port to computer.
  Rename "xxxx-factory.bin" to
  "openwrt-ar71xx-generic-ap147-16M-rootfs-squashfs.bin".
* Make sure firmware file is in the tftpd's directory, push
  reset button and plug in, hold it for 5 seconds, and then
  it will download firmware from tftp server automatically.

More information:
* This device boot from flash@0xe80000 so we need a okli
  loader to deal with small kernel partition issue. In order
  to make full use of the storage space, connect a part of the
  previous kernel partition to the firmware.

  Stock                          Modify
  0x000000-0x040000(u-boot)      0x000000-0x040000(u-boot)
  0x040000-0x050000(u-boot-env)  0x000000-0x050000(u-boot-env)
  0x050000-0xe80000(rootfs)      0x050000-0xe80000(firmware part1)
  0xe80000-0xff0000(kernel)      0xe80000-0xe90000(okli-loader)
                                 0xe90000-0xff0000(firmware part2)
  0xff0000-0x1000000(art)        0xff0000-0x1000000(art)

Signed-off-by: Shiji Yang <yangshiji66@qq.com>

target/linux/ath79/dts/qca9531_letv_lba-047-ch.dts

@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca953x.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/mtd/partitions/uimage.h>
+
+/ {
+	model = "Letv LBA-047-CH";
+	compatible = "letv,lba-047-ch", "qca,qca9531";
+
+	aliases {
+		led-boot = &led_status_red;
+		led-failsafe = &led_status_red;
+		led-running = &led_status_blue;
+		led-upgrade = &led_status_red;
+		label-mac-device = &eth0;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&led_wan_pin>;
+
+		led_status_blue: status_blue {
+			label = "blue:status";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		};
+
+		led_status_red: status_red {
+			label = "red:status";
+			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	virtual_flash {
+		compatible = "mtd-concat";
+		devices = <&fwconcat0 &fwconcat1>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				reg = <0x0 0x0>;
+				label = "firmware";
+				compatible = "openwrt,uimage", "denx,uimage";
+				openwrt,ih-magic = <IH_MAGIC_OKLI>;
+			};
+		};
+	};
+};
+
+&pinmux {
+	/* GPIO 4: LED_LINK_5 (WAN) */
+	led_wan_pin: pinmux_led_wan_pin {
+		pinctrl-single,bits = <0x04 0x0000002d 0x000000ff>;
+	};
+};
+
+&spi {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+		m25p,fast-read;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x40000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "u-boot-env";
+				reg = <0x40000 0x10000>;
+				read-only;
+			};
+
+			fwconcat0: partition@50000 {
+				label = "fwconcat0";
+				reg = <0x50000 0xe30000>;
+			};
+
+			partition@e80000 {
+				label = "loader";
+				reg = <0xe80000 0x10000>;
+			};
+
+			fwconcat1: partition@e90000 {
+				label = "fwconcat1";
+				reg = <0xe90000 0x160000>;
+			};
+
+			art: partition@ff0000 {
+				label = "art";
+				reg = <0xff0000 0x10000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&swphy4>;
+
+	nvmem-cells = <&macaddr_art_0>;
+	nvmem-cell-names = "mac-address";
+};
+
+&eth1 {
+	compatible = "qca,qca9530-eth", "syscon", "simple-mfd";
+
+	nvmem-cells = <&macaddr_art_6>;
+	nvmem-cell-names = "mac-address";
+};
+
+&wmac {
+	status = "okay";
+
+	mtd-cal-data = <&art 0x1000>;
+};
+
+&art {
+	compatible = "nvmem-cells";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	macaddr_art_0: macaddr@0 {
+		reg = <0x0 0x6>;
+	};
+
+	macaddr_art_6: macaddr@6 {
+		reg = <0x6 0x6>;
+	};
+};

target/linux/ath79/generic/base-files/etc/board.d/02_network

@@ -306,6 +306,11 @@ ath79_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0@eth0" "2:lan:3" "3:lan:2" "4:lan:1"
 		;;
+	letv,lba-047-ch)
+		ucidef_set_interface_wan "eth0"
+		ucidef_add_switch "switch0" \
+			"0@eth1" "3:lan:2" "4:lan:1"
+		;;
 	librerouter,librerouter-v1)
 		ucidef_add_switch "switch0" \
 			"0@eth0" "5:wan" "6@eth1" "4:lan"

target/linux/ath79/image/generic.mk

@@ -1414,6 +1414,21 @@ define Device/joyit_jt-or750i
 endef
 TARGET_DEVICES += joyit_jt-or750i
 
+define Device/letv_lba-047-ch
+  $(Device/loader-okli-uimage)
+  SOC := qca9531
+  DEVICE_VENDOR := Letv
+  DEVICE_MODEL := LBA-047-CH
+  IMAGE_SIZE := 15936k
+  LOADER_FLASH_OFFS := 0x50000
+  KERNEL := kernel-bin | append-dtb | lzma | uImage lzma -M 0x4f4b4c49
+  IMAGES += factory.bin
+  IMAGE/factory.bin := append-kernel | pad-to $$$$(BLOCKSIZE) | \
+	append-rootfs | pad-rootfs | check-size | pad-to 14528k | \
+	append-loader-okli-uimage $(1) | pad-to 64k
+endef
+TARGET_DEVICES += letv_lba-047-ch
+
 define Device/librerouter_librerouter-v1
   SOC := qca9558
   DEVICE_VENDOR := Librerouter