xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/arm/ux500/boards.txt

ST-Ericsson Ux500 boards
------------------------

Required properties (in root node) one of these:
	compatible = "st-ericsson,mop500" (legacy)
	compatible = "st-ericsson,u8500"

Required node (under root node):

soc: represents the system-on-chip and contains the chip
peripherals

Required property of soc node, one of these:
	compatible = "stericsson,db8500"

Required subnodes under soc node:

backupram: (used for CPU spin tables and for storing data
during retention, system won't boot without this):
	compatible = "ste,dbx500-backupram"

scu:
	see binding for arm/arm,scu.yaml

interrupt-controller:
	see binding for interrupt-controller/arm,gic.txt

timer:
	see binding for timer/arm,twd-timer.yaml

clocks:
	see binding for clocks/ux500.txt

Example:

/dts-v1/;

/ {
        model = "ST-Ericsson HREF (pre-v60) and ST UIB";
        compatible = "st-ericsson,mop500", "st-ericsson,u8500";

        soc {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "stericsson,db8500";
		interrupt-parent = <&intc>;
		ranges;

		backupram@80150000 {
			compatible = "ste,dbx500-backupram";
			reg = <0x80150000 0x2000>;
		};

		intc: interrupt-controller@a0411000 {
			compatible = "arm,cortex-a9-gic";
			#interrupt-cells = <3>;
			#address-cells = <1>;
			interrupt-controller;
			reg = <0xa0411000 0x1000>,
			      <0xa0410100 0x100>;
		};

		scu@a0410000 {
			compatible = "arm,cortex-a9-scu";
			reg = <0xa0410000 0x100>;
		};

		timer@a0410600 {
			compatible = "arm,cortex-a9-twd-timer";
			reg = <0xa0410600 0x20>;
			interrupts = <1 13 0x304>; /* IRQ level high per-CPU */
			clocks = <&smp_twd_clk>;
		};

		clocks {
			compatible = "stericsson,u8500-clks";

			smp_twd_clk: smp-twd-clock {
				#clock-cells = <0>;
			};
		};
        };
};