MIPS: ath79: add initial support for Dragino MS14 (Dragino 2)

The following features are supported:

  * UART;
  * SPI-flash;
  * USB host;
  * GPIO keys and LEDs.

Links:

    * http://www.dragino.com/products/mother-board/item/71-ms14-p.html
    * https://wiki.openwrt.org/toh/dragino/ms14

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Gabor Juhos <juhosg@openwrt.org>
Cc: Alban Bedel <albeu@free.fr>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12882/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 103 insertions, 0 deletions

diff --git a/arch/mips/boot/dts/qca/Makefile b/arch/mips/boot/dts/qca/Makefile
index 5e2c20d64138..245136478998 100644
--- a/arch/mips/boot/dts/qca/Makefile
+++ b/arch/mips/boot/dts/qca/Makefile
@@ -1,5 +1,6 @@
 # All DTBs
 dtb-$(CONFIG_ATH79)                     += ar9132_tl_wr1043nd_v1.dtb
+dtb-$(CONFIG_ATH79)                     += ar9331_dragino_ms14.dtb
 dtb-$(CONFIG_ATH79)                     += ar9331_tl_mr3020.dtb
 
 # Force kbuild to make empty built-in.o if necessary
diff --git a/arch/mips/boot/dts/qca/ar9331_dragino_ms14.dts b/arch/mips/boot/dts/qca/ar9331_dragino_ms14.dts
new file mode 100644
index 000000000000..56f832076a69
--- /dev/null
+++ b/arch/mips/boot/dts/qca/ar9331_dragino_ms14.dts
@@ -0,0 +1,102 @@
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "ar9331.dtsi"
+
+/ {
+        model = "Dragino MS14 (Dragino 2)";
+        compatible = "dragino,ms14";
+
+        aliases {
+                serial0 = &uart;
+        };
+
+        memory@0 {
+                device_type = "memory";
+                reg = <0x0 0x4000000>;
+        };
+
+        leds {
+                compatible = "gpio-leds";
+
+                wlan {
+                        label = "dragino2:red:wlan";
+                        gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+                        default-state = "off";
+                };
+
+                lan {
+                        label = "dragino2:red:lan";
+                        gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+                        default-state = "off";
+                };
+
+                wan {
+                        label = "dragino2:red:wan";
+                        gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+                        default-state = "off";
+                };
+
+                system {
+                        label = "dragino2:red:system";
+                        gpios = <&gpio 28 GPIO_ACTIVE_HIGH>;
+                        default-state = "off";
+                };
+        };
+
+        gpio-keys-polled {
+                compatible = "gpio-keys-polled";
+                #address-cells = <1>;
+                #size-cells = <0>;
+                poll-interval = <100>;
+
+                button@0 {
+                        label = "jumpstart";
+                        linux,code = <KEY_WPS_BUTTON>;
+                        gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+                };
+
+                button@1 {
+                        label = "reset";
+                        linux,code = <KEY_RESTART>;
+                        gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+                };
+        };
+};
+
+&ref {
+        clock-frequency = <25000000>;
+};
+
+&uart {
+        status = "okay";
+};
+
+&gpio {
+        status = "okay";
+};
+
+&usb {
+        dr_mode = "host";
+        status = "okay";
+};
+
+&usb_phy {
+        status = "okay";
+};
+
+&spi {
+        num-chipselects = <1>;
+        status = "okay";
+
+        /* Winbond 25Q128BVFG SPI flash */
+        spiflash: w25q128@0 {
+                #address-cells = <1>;
+                #size-cells = <1>;
+                compatible = "winbond,w25q128", "jedec,spi-nor";
+                spi-max-frequency = <104000000>;
+                reg = <0>;
+        };
+};