ath79: add support for ELECOM WRC-1750GHBK2-I/C

ELECOM WRC-1750GHBK2-I/WRC-1750GHBK2-C are 2.4/5 GHz band 11ac
routers, based on Qualcomm Atheros QCA9563.

This commit also includes small fix; use "0x0x03000101" as pll_1000
instead of "0x03000000".

Specification:

- SoC:      Qualcom Atheros QCA9563
- RAM:      128 MB (DDR2)
- Flash:    16 MB (SPI-NOR)
- WLAN:     2.4/5 GHz
  - 2.4 GHz: 2T2R (SoC internal)
  - 5 GHz:   3T3R (QCA9880)
- Ethernet: 10/100/1000 Mbps
- LED/key:  4x/3x (2x buttons, 1x slide-switch)
- UART:     through-hole on PCB
  - Vcc, RX, GND, TX from switch (QCA8337N) side
  - 115200n8

Flash instruction using factory image:

1. Boot WRC-1750GHBK2-I/C normaly
2. Access to "http://192.168.2.1/" and open firmware upgrade page
("ファームウェア更新 手動更新（アップデート）")
3. Select the OpenWrt factory image and click apply ("適用") button
to perform firmware update
4. On the (initramfs) factory image, perform sysupgrade with
squashfs-sysupgrade image
5. Wait ~150 seconds to complete flashing

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>

1 files changed, 127 insertions, 0 deletions

diff --git a/target/linux/ath79/dts/qca9563_elecom_wrc-ghbk2-i.dtsi b/target/linux/ath79/dts/qca9563_elecom_wrc-ghbk2-i.dtsi
new file mode 100644
index 0000000000..8d5bbe180c
--- /dev/null
+++ b/target/linux/ath79/dts/qca9563_elecom_wrc-ghbk2-i.dtsi
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "qca956x.dtsi"
+
+/ {
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+	};
+
+	aliases {
+		led-boot = &power;
+		led-failsafe = &power;
+		led-running = &power;
+		led-upgrade = &power;
+	};
+
+	leds: leds {
+		compatible = "gpio-leds";
+
+		wps {
+			label = "elecom:red:wps";
+			gpios = <&gpio 9 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+			debounce-interval = <60>;
+		};
+
+		button_wps {
+			label = "wps";
+			gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+			debounce-interval = <60>;
+		};
+
+		ap {
+			label = "ap";
+			gpios = <&gpio 6 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_0>;
+			linux,input-type = <EV_SW>;
+			debounce-interval = <60>;
+		};
+	};
+};
+
+&spi {
+	status = "okay";
+	num-cs = <1>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+
+		partitions: partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x000000 0x040000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "u-boot-env";
+				reg = <0x040000 0x010000>;
+				read-only;
+			};
+
+			partition@50000 {
+				label = "nvram";
+				reg = <0x050000 0x020000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&mdio0 {
+	status = "okay";
+
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+
+		qca,ar8327-initvals = <
+			0x04 0x00000080 /* PORT0 PAD MODE CTRL */
+			0x50 0xcf37cf37 /* LED_CTRL0 */
+			0x54 0x00000000 /* LED_CTRL1 */
+			0x58 0x00000000 /* LED_CTRL2 */
+			0x5c 0x03ffff00 /* LED_CTRL3 */
+			0x7c 0x0000007e /* PORT0_STATUS */
+		>;
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	pll-data = <0x03000101 0x00000101 0x00001919>;
+
+	mtd-mac-address = <&ART 0x1002>;
+	mtd-mac-address-increment = <(-1)>;
+	phy-mode = "sgmii";
+	phy-handle = <&phy0>;
+};
+
+&uart {
+	status = "okay";
+};
+
+&wmac {
+	status = "okay";
+	mtd-cal-data = <&ART 0x1000>;
+};