ipq40xx: add support for Linksys EA6350v3

Specifications:
SOC: Qualcomm IPQ4018
RAM: 256 MiB Samsung K4B2G1646F-BYK0
FLASH1: MX25L1605D 2 MB
FLASH2: Winbond W25N01GV 128Mb
ETH: Qualcomm QCA8075
WLAN0: Qualcomm Atheros QCA4018 2.4GHz 802.11b/g/n 2x2
WLAN1: Qualcomm Atheros QCA4018 5GHz 802.11n/ac W2 2x2
INPUT: WPS, Reset
LED: Status - Green
SERIAL: Header at J19, Beneath DC Power Jack
        1-VCC ; 2-TX ; 3-RX; 4-GND;
        Serial 115200-8-N-1.

Tested and working:
- USB (requires extra packages)
- LAN Ethernet (Correct MAC-address)
- WAN Ethernet (Correct MAC-address)
- 2.4 GHz WiFi (Correct MAC-address)
- 5 GHz WiFi (Correct MAC-address)
- Factory installation from Web UI
- OpenWRT sysupgrade
- LED
- Reset Button

Need Testing:
- WPS button

Install via Web UI:
- Attach to a LAN port on the router.
- Connect to the Linksys Smart WiFi Page (default 192.168.1.1) and login
- Select the connectivity tab on the left
- In the manual update box on the right
- Select browse, and browse to
  openwrt-ipq40xx-linksys_ea6350v3-squashfs-factory.bin
- Click update.
- Read and accept the warning
- The router LED will start blinking. When the router LED goes solid, you
  can now navigate to 192.168.1.1 to your new OpenWrt installation.

Sysupgrade:
- Flash the sysupgrade image as usual. Please: try to do a reset everytime
  you can (doing it with LuCI is easy and can be done in the same step).

Recovery (Automatic):
- If the device fails to boot after install or upgrade, whilst the unit is
  turned on:
1 - Wait 15 seconds
2 - Switch Off and Wait 10 seconds
3 - Switch on
4 - Repeat steps 1 to 3, 3 times then go to 5.
5 - U-boot will have now erased the failed update and switched back to the
    last working firmware - you should be able to access your router on
    LAN.

Recovery (Manual):
- The steps for manual recovery are the same as the generic u-boot tftp
  client method.

Back To Stock:
- Use the generic recovery using the tftp client method to flash the
  "civic.img". Also you can strip-and-pad the original image and use
  the generic "mtd" method by flashing over the "kernel" partition.
* Just be careful to flash in the partition that the device is currently
  booted.

Signed-off-by: Ryan Pannell <ryan@osukl.com>
Signed-off-by: Oever González <notengobattery@gmail.com>
[minor edits, removed second compatible of nand, added dtb entry to 4.19]
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

1 files changed, 273 insertions, 0 deletions

diff --git a/target/linux/ipq40xx/files-4.19/arch/arm/boot/dts/qcom-ipq4018-ea6350v3.dts b/target/linux/ipq40xx/files-4.19/arch/arm/boot/dts/qcom-ipq4018-ea6350v3.dts
new file mode 100644
index 0000000000..a6f1e1c5b2
--- /dev/null
+++ b/target/linux/ipq40xx/files-4.19/arch/arm/boot/dts/qcom-ipq4018-ea6350v3.dts
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qcom-ipq4019.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/soc/qcom,tcsr.h>
+
+/ {
+	model = "Linksys EA6350v3";
+	compatible = "linksys,ea6350v3";
+
+	aliases {
+		led-boot = &power;
+		led-failsafe = &power;
+		led-running = &power;
+		led-upgrade = &power;
+	};
+
+	soc {
+		mdio@90000 {
+			status = "okay";
+		};
+
+		ess-psgmii@98000 {
+			status = "okay";
+		};
+
+		tcsr@1949000 {
+			compatible = "qcom,tcsr";
+			reg = <0x1949000 0x100>;
+			qcom,wifi_glb_cfg = <TCSR_WIFI_GLB_CFG>;
+		};
+
+		tcsr@194b000 {
+			compatible = "qcom,tcsr";
+			reg = <0x194b000 0x100>;
+			qcom,usb-hsphy-mode-select = <TCSR_USB_HSPHY_HOST_MODE>;
+		};
+
+		ess_tcsr@1953000 {
+			compatible = "qcom,tcsr";
+			reg = <0x1953000 0x1000>;
+			qcom,ess-interface-select = <TCSR_ESS_PSGMII>;
+		};
+
+		tcsr@1957000 {
+			compatible = "qcom,tcsr";
+			reg = <0x1957000 0x100>;
+			qcom,wifi_noc_memtype_m0_m2 = <TCSR_WIFI_NOC_MEMTYPE_M0_M2>;
+		};
+
+		usb2@60f8800 {
+			status = "okay";
+		};
+
+		usb3@8af8800 {
+			status = "okay";
+		};
+
+		crypto@8e3a000 {
+			status = "okay";
+		};
+
+		watchdog@b017000 {
+			status = "okay";
+		};
+
+		ess-switch@c000000 {
+			status = "okay";
+		};
+
+		edma@c080000 {
+			status = "okay";
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&tlmm 63 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&tlmm 0 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		power: status {
+			label = "EA6350v3:green:status";
+			gpios = <&tlmm 2 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&blsp1_uart1 {
+	pinctrl-0 = <&serial_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&cryptobam {
+	status = "okay";
+};
+
+&wifi0 {
+	status = "okay";
+	qcom,ath10k-calibration-variant = "linksys-ea6350v3";
+};
+
+&wifi1 {
+	status = "okay";
+	qcom,ath10k-calibration-variant = "linksys-ea6350v3";
+};
+
+
+&blsp_dma {
+	status = "okay";
+};
+
+&tlmm {
+	serial_pins: serial_pinmux {
+		mux {
+			pins = "gpio60", "gpio61";
+			function = "blsp_uart0";
+			bias-disable;
+		};
+	};
+
+	spi_0_pins: spi_0_pinmux {
+		mux {
+			function = "blsp_spi0";
+			pins = "gpio55", "gpio56", "gpio57";
+			drive-strength = <12>;
+			bias-disable;
+		};
+
+		mux_cs {
+			function = "gpio";
+			pins = "gpio54", "gpio59";
+			drive-strength = <2>;
+			bias-disable;
+			output-high;
+		};
+	};
+};
+
+&blsp1_spi1 { /* BLSP1 QUP1 */
+	pinctrl-0 = <&spi_0_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+	cs-gpios = <&tlmm 54 GPIO_ACTIVE_HIGH>,
+		   <&tlmm 59 GPIO_ACTIVE_HIGH>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <24000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			SBL1@0 {
+				label = "SBL1";
+				reg = <0x00000000 0x00040000>;
+				read-only;
+			};
+			MBIB@40000 {
+				label = "MIBIB";
+				reg = <0x00040000 0x00020000>;
+				read-only;
+			};
+			QSEE@60000 {
+				label = "QSEE";
+				reg = <0x00060000 0x00060000>;
+				read-only;
+			};
+			CDT@c0000 {
+				label = "CDT";
+				reg = <0x000c0000 0x00010000>;
+				read-only;
+			};
+			APPSBLENV@d0000 {
+				label = "APPSBLENV";
+				reg = <0x000d0000 0x00010000>;
+				read-only;
+			};
+			APPSBL@e0000 {
+				label = "APPSBL"; /* uboot */
+				reg = <0x000e0000 0x00080000>;
+				read-only;
+			};
+			ART@160000 {
+				label = "ART";
+				reg = <0x00160000 0x00010000>;
+				read-only;
+			};
+			u_env@170000 {
+				label = "u_env";
+				reg = <0x00170000 0x00020000>;
+			};
+			s_env@190000 {
+				label = "s_env";
+				reg = <0x00190000 0x00020000>;
+			};
+			devinfo@1b0000 {
+				label = "devinfo";
+				reg = <0x001b0000 0x00010000>;
+			};
+			/* 0x001c0000 - 0x00200000 unused */
+		};
+	};
+
+	flash@1 {
+		status = "okay";
+		compatible = "spi-nand";
+		reg = <1>;
+		spi-max-frequency = <24000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			kernel@0 {
+				label = "kernel";
+				reg = <0x00000000 0x02800000>;
+			};
+			rootfs@300000 {
+				label = "rootfs";
+				reg = <0x00300000 0x02500000>;
+			};
+			alt_kernel@2800000 {
+				label = "alt_kernel";
+				reg = <0x02800000 0x02800000>;
+			};
+			alt_rootfs@2b00000 {
+				label = "alt_rootfs";
+				reg = <0x02b00000 0x02500000>;
+			};
+			sysdiag@5000000 {
+				label = "sysdiag";
+				reg = <0x05000000 0x00100000>;
+			};
+			syscfg@5100000 {
+				label = "syscfg";
+				reg = <0x05100000 0x02F00000>;
+			};
+			/* 0x00000000 - 0x08000000: 128 MiB */
+		};
+	};
+};
+
+&usb3_ss_phy {
+	status = "okay";
+};
+
+&usb3_hs_phy {
+	status = "okay";
+};
+
+&usb2_hs_phy {
+	status = "okay";
+};