ARM: dts: sun8i: R40: Add SPI controllers nodes and pinmuxes

The Allwinner R40 SoC contains four SPI controllers, using the newer
sun6i design (but at the legacy addresses).
The controller seems to be fully compatible to the A64 one, so no driver
changes are necessary.
The first three controllers can be used on two sets of pins, but SPI3 is
only routed to one set on Port A.
Only the pin groups for SPI0 on PortC and SPI1 on PortI are added here,
because those seem to be the only one exposed on the Bananapi boards.

Tested by connecting a SPI flash to a Bananapi M2 Berry SPI0 and SPI1
header pins.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>

arch/arm/boot/dts/sun8i-r40.dtsi

@@ -447,6 +447,36 @@ mmc2_pins: mmc2-pins {
 				bias-pull-up;
 			};
 
+			/omit-if-no-ref/
+			spi0_pc_pins: spi0-pc-pins {
+				pins = "PC0", "PC1", "PC2";
+				function = "spi0";
+			};
+
+			/omit-if-no-ref/
+			spi0_cs0_pc_pin: spi0-cs0-pc-pin {
+				pins = "PC23";
+				function = "spi0";
+			};
+
+			/omit-if-no-ref/
+			spi1_pi_pins: spi1-pi-pins {
+				pins = "PI17", "PI18", "PI19";
+				function = "spi1";
+			};
+
+			/omit-if-no-ref/
+			spi1_cs0_pi_pin: spi1-cs0-pi-pin {
+				pins = "PI16";
+				function = "spi1";
+			};
+
+			/omit-if-no-ref/
+			spi1_cs1_pi_pin: spi1-cs1-pi-pin {
+				pins = "PI15";
+				function = "spi1";
+			};
+
 			uart0_pb_pins: uart0-pb-pins {
 				pins = "PB22", "PB23";
 				function = "uart0";
@@ -623,6 +653,58 @@ i2c4: i2c@1c2c000 {
 			#size-cells = <0>;
 		};
 
+		spi0: spi@1c05000 {
+			compatible = "allwinner,sun8i-r40-spi",
+				     "allwinner,sun8i-h3-spi";
+			reg = <0x01c05000 0x1000>;
+			interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_SPI0>, <&ccu CLK_SPI0>;
+			clock-names = "ahb", "mod";
+			resets = <&ccu RST_BUS_SPI0>;
+			status = "disabled";
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		spi1: spi@1c06000 {
+			compatible = "allwinner,sun8i-r40-spi",
+				     "allwinner,sun8i-h3-spi";
+			reg = <0x01c06000 0x1000>;
+			interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_SPI1>, <&ccu CLK_SPI1>;
+			clock-names = "ahb", "mod";
+			resets = <&ccu RST_BUS_SPI1>;
+			status = "disabled";
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		spi2: spi@1c07000 {
+			compatible = "allwinner,sun8i-r40-spi",
+				     "allwinner,sun8i-h3-spi";
+			reg = <0x01c07000 0x1000>;
+			interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_SPI2>, <&ccu CLK_SPI2>;
+			clock-names = "ahb", "mod";
+			resets = <&ccu RST_BUS_SPI2>;
+			status = "disabled";
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		spi3: spi@1c0f000 {
+			compatible = "allwinner,sun8i-r40-spi",
+				     "allwinner,sun8i-h3-spi";
+			reg = <0x01c0f000 0x1000>;
+			interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_SPI3>, <&ccu CLK_SPI3>;
+			clock-names = "ahb", "mod";
+			resets = <&ccu RST_BUS_SPI3>;
+			status = "disabled";
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
 		ahci: sata@1c18000 {
 			compatible = "allwinner,sun8i-r40-ahci";
 			reg = <0x01c18000 0x1000>;