MIPS: ath79: add initial support for DPT-Module

The following features are supported:

  * UART;
  * SPI-flash;
  * USB host;
  * GPIO key and LED.

Links:

  * https://dptechnics.com/shop/index.php?route=product/product&path=59&product_id=50
  * https://dptechnics.com/shop/index.php?route=product/product&path=59&product_id=63

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Daan Pape <daan@dptechnics.com>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12886/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 79 insertions, 0 deletions

diff --git a/arch/mips/boot/dts/qca/Makefile b/arch/mips/boot/dts/qca/Makefile
index dc0b5a4071c4..63a9ddf048c9 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_dpt_module.dtb
 dtb-$(CONFIG_ATH79)                     += ar9331_dragino_ms14.dtb
 dtb-$(CONFIG_ATH79)                     += ar9331_omega.dtb
 dtb-$(CONFIG_ATH79)                     += ar9331_tl_mr3020.dtb
diff --git a/arch/mips/boot/dts/qca/ar9331_dpt_module.dts b/arch/mips/boot/dts/qca/ar9331_dpt_module.dts
new file mode 100644
index 000000000000..98e74500e79d
--- /dev/null
+++ b/arch/mips/boot/dts/qca/ar9331_dpt_module.dts
@@ -0,0 +1,78 @@
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "ar9331.dtsi"
+
+/ {
+        model = "DPTechnics DPT-Module";
+        compatible = "dptechnics,dpt-module";
+
+        aliases {
+                serial0 = &uart;
+        };
+
+        memory@0 {
+                device_type = "memory";
+                reg = <0x0 0x4000000>;
+        };
+
+        leds {
+                compatible = "gpio-leds";
+
+                system {
+                        label = "dpt-module:green:system";
+                        gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
+                        default-state = "off";
+                };
+        };
+
+        gpio-keys-polled {
+                compatible = "gpio-keys-polled";
+                #address-cells = <1>;
+                #size-cells = <0>;
+                poll-interval = <100>;
+
+                button@0 {
+                        label = "reset";
+                        linux,code = <KEY_RESTART>;
+                        gpios = <&gpio 11 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 25Q128FVSG SPI flash */
+        spiflash: w25q128@0 {
+                #address-cells = <1>;
+                #size-cells = <1>;
+                compatible = "winbond,w25q128", "jedec,spi-nor";
+                spi-max-frequency = <104000000>;
+                reg = <0>;
+        };
+};