Add rpi config

1 files changed, 49 insertions, 0 deletions

diff --git a/machines/rpi3-amadeus/spi.dts b/machines/rpi3-amadeus/spi.dts
new file mode 100644
index 0000000..db76c4b
--- /dev/null
+++ b/machines/rpi3-amadeus/spi.dts
@@ -0,0 +1,49 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "raspberrypi";
+	fragment@0 {
+		target = <&spi>;
+		__overlay__ {
+			cs-gpios = <&gpio 8 1>, <&gpio 7 1>;
+			status = "okay";
+			pinctrl-names = "default";
+			pinctrl-0 = <&spi0_pins &spi0_cs_pins>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			spidev@0 {
+				reg = <0>;	// CE0
+				spi-max-frequency = <500000>;
+				compatible = "spidev";
+			};
+
+			spidev@1 {
+				reg = <1>;	// CE1
+				spi-max-frequency = <500000>;
+				compatible = "spidev";
+			};
+		};
+	};
+        fragment@1 {
+		target = <&alt0>;
+		__overlay__ {
+			// Drop GPIO 7, SPI 8-11
+			brcm,pins = <4 5>;
+		};
+	};
+
+	fragment@2 {
+		target = <&gpio>;
+		__overlay__ {
+			spi0_pins: spi0_pins {
+				brcm,pins = <9 10 11>;
+				brcm,function = <4>; // alt0
+			};
+			spi0_cs_pins: spi0_cs_pins {
+				brcm,pins = <8 7>;
+				brcm,function = <1>; // out
+			};
+		};
+	};
+};