linux-zen-server/arch/arm/boot/dts/integratorcp.dts

// SPDX-License-Identifier: GPL-2.0
/*
 * Device Tree for the ARM Integrator/CP platform
 */

/dts-v1/;
/include/ "integrator.dtsi"

/ {
	model = "ARM Integrator/CP";
	compatible = "arm,integrator-cp";

	chosen {
		bootargs = "root=/dev/ram0 console=ttyAMA0,38400n8 earlyprintk";
	};

	cpus {
		#address-cells = <1>;
		#size-cells = <0>;

		cpu@0 {
			device_type = "cpu";
			/*
			 * Since the board has pluggable CPU modules, we
			 * cannot define a proper compatible here. Let the
			 * boot loader fill in the apropriate compatible
			 * string if necessary.
			 */
			/* compatible = "arm,arm920t"; */
			reg = <0>;
			/*
			 * TBD comment.
			 */
					 /* kHz     uV   */
			operating-points = <50000  0
					    48000  0>;
			clocks = <&cmcore>;
			clock-names = "cpu";
			clock-latency = <1000000>; /* 1 ms */
		};
	};

	/*
	 * The Integrator/CP overall clocking architecture can be found in
	 * ARM DUI 0184B page 7-28 "Integrator/CP922T system clocks" which
	 * appear to illustrate the layout used in most configurations.
	 */

	/* The codec chrystal operates at 24.576 MHz */
	xtal_codec: xtal24.576@24.576M {
		#clock-cells = <0>;
		compatible = "fixed-clock";
		clock-frequency = <24576000>;
	};

	/* The chrystal is divided by 2 by the codec for the AACI bit clock */
	aaci_bitclk: aaci_bitclk@12.288M {
		#clock-cells = <0>;
		compatible = "fixed-factor-clock";
		clock-div = <2>;
		clock-mult = <1>;
		clocks = <&xtal_codec>;
	};

	/* This is a 25MHz chrystal on the base board */
	xtal25mhz: xtal25mhz@25M {
		#clock-cells = <0>;
		compatible = "fixed-clock";
		clock-frequency = <25000000>;
	};

	/* The UART clock is 14.74 MHz divided from 25MHz by an ICS525 */
	uartclk: uartclk@14.74M {
		#clock-cells = <0>;
		compatible = "fixed-clock";
		clock-frequency = <14745600>;
	};

	/* Actually sysclk I think */
	pclk: pclk@0 {
		#clock-cells = <0>;
		compatible = "fixed-clock";
		clock-frequency = <0>;
	};

	core-module@10000000 {
		/* 24 MHz chrystal on the core module */
		cm24mhz: cm24mhz@24M {
			#clock-cells = <0>;
			compatible = "fixed-clock";
			clock-frequency = <24000000>;
		};

		/* Oscillator on the core module, clocks the CPU core */
		cmcore: clock-controller@8 {
			compatible = "arm,syscon-icst525-integratorcp-cm-core";
			reg = <0x08 0x04>;
			#clock-cells = <0>;
			lock-offset = <0x14>;
			vco-offset = <0x08>;
			clocks = <&cm24mhz>;
		};

		/* Oscillator on the core module, clocks the memory bus */
		cmmem: clock-controller@8,12 {
			compatible = "arm,syscon-icst525-integratorcp-cm-mem";
			reg = <0x08 0x04>;
			#clock-cells = <0>;
			lock-offset = <0x14>;
			vco-offset = <0x08>;
			clocks = <&cm24mhz>;
		};

		/* Auxilary oscillator on the core module, clocks the CLCD */
		auxosc: clock-controller@1c {
			compatible = "arm,syscon-icst525";
			reg = <0x1c 0x04>;
			#clock-cells = <0>;
			lock-offset = <0x14>;
			vco-offset = <0x1c>;
			clocks = <&cm24mhz>;
		};

		/* The KMI clock is the 24 MHz oscillator divided to 8MHz */
		kmiclk: kmiclk@1M {
			#clock-cells = <0>;
			compatible = "fixed-factor-clock";
			clock-div = <3>;
			clock-mult = <1>;
			clocks = <&cm24mhz>;
		};

		/* The timer clock is the 24 MHz oscillator divided to 1MHz */
		timclk: timclk@1M {
			#clock-cells = <0>;
			compatible = "fixed-factor-clock";
			clock-div = <24>;
			clock-mult = <1>;
			clocks = <&cm24mhz>;
		};
	};

	syscon {
		compatible = "arm,integrator-cp-syscon", "syscon";
		reg = <0xcb000000 0x100>;
	};

	timer0: timer@13000000 {
		/* TIMER0 runs directly on the 25MHz chrystal */
		compatible = "arm,integrator-cp-timer";
		clocks = <&xtal25mhz>;
	};

	timer1: timer@13000100 {
		/* TIMER1 runs @ 1MHz */
		compatible = "arm,integrator-cp-timer";
		clocks = <&timclk>;
	};

	timer2: timer@13000200 {
		/* TIMER2 runs @ 1MHz */
		compatible = "arm,integrator-cp-timer";
		clocks = <&timclk>;
	};

	pic: pic@14000000 {
		valid-mask = <0x1fc003ff>;
	};

	cic: cic@10000040 {
		compatible = "arm,versatile-fpga-irq";
		#interrupt-cells = <1>;
		interrupt-controller;
		reg = <0x10000040 0x100>;
		clear-mask = <0xffffffff>;
		valid-mask = <0x00000007>;
	};

	/* The SIC is cascaded off IRQ 26 on the PIC */
	sic: sic@ca000000 {
		compatible = "arm,versatile-fpga-irq";
		interrupt-parent = <&pic>;
		interrupts = <26>;
		#interrupt-cells = <1>;
		interrupt-controller;
		reg = <0xca000000 0x100>;
		clear-mask = <0x00000fff>;
		valid-mask = <0x00000fff>;
	};

	ethernet@c8000000 {
		compatible = "smsc,lan91c111";
		reg = <0xc8000000 0x10>;
		interrupt-parent = <&pic>;
		interrupts = <27>;
	};

	bridge {
		compatible = "ti,ths8134a", "ti,ths8134";
		#address-cells = <1>;
		#size-cells = <0>;

		ports {
			#address-cells = <1>;
			#size-cells = <0>;

			port@0 {
				reg = <0>;

				vga_bridge_in: endpoint {
					remote-endpoint = <&clcd_pads_vga_dac>;
				};
			};

			port@1 {
				reg = <1>;

				vga_bridge_out: endpoint {
					remote-endpoint = <&vga_con_in>;
				};
			};
		};
	};

	vga {
		compatible = "vga-connector";

		port {
			vga_con_in: endpoint {
				remote-endpoint = <&vga_bridge_out>;
			};
		};
	};

	fpga {
		/*
		 * These PrimeCells are at the same location and using
		 * the same interrupts in all Integrators, but in the CP
		 * slightly newer versions are deployed.
		 */
		rtc@15000000 {
			compatible = "arm,pl031", "arm,primecell";
			clocks = <&pclk>;
			clock-names = "apb_pclk";
		};

		serial@16000000 {
			compatible = "arm,pl011", "arm,primecell";
			clocks = <&uartclk>, <&pclk>;
			clock-names = "uartclk", "apb_pclk";
		};

		serial@17000000 {
			compatible = "arm,pl011", "arm,primecell";
			clocks = <&uartclk>, <&pclk>;
			clock-names = "uartclk", "apb_pclk";
		};

		kmi@18000000 {
			compatible = "arm,pl050", "arm,primecell";
			clocks = <&kmiclk>, <&pclk>;
			clock-names = "KMIREFCLK", "apb_pclk";
		};

		kmi@19000000 {
			compatible = "arm,pl050", "arm,primecell";
			clocks = <&kmiclk>, <&pclk>;
			clock-names = "KMIREFCLK", "apb_pclk";
		};

		/*
		 * These PrimeCells are only available on the Integrator/CP
		 */
		mmc@1c000000 {
			compatible = "arm,pl180", "arm,primecell";
			reg = <0x1c000000 0x1000>;
			interrupts = <23 24>;
			max-frequency = <515633>;
			clocks = <&uartclk>, <&pclk>;
			clock-names = "mclk", "apb_pclk";
		};

		aaci@1d000000 {
			compatible = "arm,pl041", "arm,primecell";
			reg = <0x1d000000 0x1000>;
			interrupts = <25>;
			clocks = <&pclk>;
			clock-names = "apb_pclk";
		};

		clcd@c0000000 {
			compatible = "arm,pl110", "arm,primecell";
			reg = <0xC0000000 0x1000>;
			interrupts = <22>;
			clocks = <&auxosc>, <&pclk>;
			clock-names = "clcdclk", "apb_pclk";
			/* 640x480 16bpp @ 25.175MHz is 36827428 bytes/s */
			max-memory-bandwidth = <40000000>;

			/*
			 * This port is routed through a PLD (Programmable
			 * Logic Device) that routes the output from the CLCD
			 * (after transformations) to the VGA DAC and also an
			 * external panel connector. The PLD is essential for
			 * supporting RGB565/BGR565.
			 *
			 * The signals from the port thus reaches two endpoints.
			 * The PLD is managed through a few special bits in the
			 * FPGA "sysreg".
			 *
			 * This arrangement can be clearly seen in
			 * ARM DUI 0225D, page 3-41, figure 3-19.
			 */
			port@0 {
				clcd_pads_vga_dac: endpoint {
					remote-endpoint = <&vga_bridge_in>;
					arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
				};
			};
		};
	};
};