arm64: dts: marvell: use aliases for SPI busses on Armada 7K/8K

We are currently using the cell-index DT property to assign SPI bus
numbers. This property is specific to the spi-orion driver, and
requires each SPI controller to have a unique ID defined in the Device
Tree.

As we are about to merge armada-cp110-master.dtsi and
armada-cp110-slave.dtsi into a single file, those cell-index
properties that differ between the master CP110 and the slave CP110
are a difference that would have to be handled.

In order to avoid this, we switch to using the "aliases" DT node to
assign a unique number to each SPI controller. This is more generic,
and directly handled by the SPI core.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm64/boot/dts/marvell/armada-70x0.dtsi

@@ -50,6 +50,8 @@ / {
 	aliases {
 		gpio1 = &cpm_gpio1;
 		gpio2 = &cpm_gpio2;
+		spi1 = &cpm_spi0;
+		spi2 = &cpm_spi1;
 	};
 };
 

arch/arm64/boot/dts/marvell/armada-80x0.dtsi

@@ -51,6 +51,10 @@ / {
 	aliases {
 		gpio1 = &cps_gpio1;
 		gpio2 = &cpm_gpio2;
+		spi1 = &cpm_spi0;
+		spi2 = &cpm_spi1;
+		spi3 = &cps_spi0;
+		spi4 = &cps_spi1;
 	};
 };
 

arch/arm64/boot/dts/marvell/armada-ap806.dtsi

@@ -58,6 +58,7 @@ aliases {
 		serial0 = &uart0;
 		serial1 = &uart1;
 		gpio0 = &ap_gpio;
+		spi0 = &spi0;
 	};
 
 	psci {
@@ -203,7 +204,6 @@ spi0: spi@510600 {
 				reg = <0x510600 0x50>;
 				#address-cells = <1>;
 				#size-cells = <0>;
-				cell-index = <0>;
 				interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&ap_clk 3>;
 				status = "disabled";

arch/arm64/boot/dts/marvell/armada-cp110-master.dtsi

@@ -283,7 +283,6 @@ cpm_spi0: spi@700600 {
 				reg = <0x700600 0x50>;
 				#address-cells = <0x1>;
 				#size-cells = <0x0>;
-				cell-index = <1>;
 				clocks = <&cpm_clk 1 21>;
 				status = "disabled";
 			};
@@ -293,7 +292,6 @@ cpm_spi1: spi@700680 {
 				reg = <0x700680 0x50>;
 				#address-cells = <1>;
 				#size-cells = <0>;
-				cell-index = <2>;
 				clocks = <&cpm_clk 1 21>;
 				status = "disabled";
 			};

arch/arm64/boot/dts/marvell/armada-cp110-slave.dtsi

@@ -284,7 +284,6 @@ cps_spi0: spi@700600 {
 				reg = <0x700600 0x50>;
 				#address-cells = <0x1>;
 				#size-cells = <0x0>;
-				cell-index = <3>;
 				clocks = <&cps_clk 1 21>;
 				status = "disabled";
 			};
@@ -294,7 +293,6 @@ cps_spi1: spi@700680 {
 				reg = <0x700680 0x50>;
 				#address-cells = <1>;
 				#size-cells = <0>;
-				cell-index = <4>;
 				clocks = <&cps_clk 1 21>;
 				status = "disabled";
 			};