Linux preempt-rt

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/*
 * Copyright 2018 Foundries.io Ltd
 * SPDX-License-Identifier: Apache-2.0
 */

#include <dt-bindings/interrupt-controller/openisa-intmux.h>
#include <dt-bindings/gpio/gpio.h>

/ {
	#address-cells = <1>;
	#size-cells = <1>;

	aliases {
		pcc-0 = &pcc0;
		pcc-1 = &pcc1;
		intmux = &intmux;
		system-lptmr = &lptmr0;
		pinmux-a = &pinmux_a;
		pinmux-b = &pinmux_b;
		pinmux-c = &pinmux_c;
		pinmux-d = &pinmux_d;
		pinmux-e = &pinmux_e;
		gpio-a = &gpioa;
		gpio-b = &gpiob;
		gpio-c = &gpioc;
		gpio-d = &gpiod;
		gpio-e = &gpioe;
		uart-0 = &uart0;
		uart-1 = &uart1;
		uart-2 = &uart2;
		uart-3 = &uart3;
	};

	cpus {
		#address-cells = <1>;
		#size-cells = <0>;
		cpu@0 {
			device_type = "cpu";
			compatible = "riscv";
			reg = <0>;
		};
	};

	sram0: memory@20000000 {
		device_type = "memory";
		compatible = "mmio-sram";
		reg = <0x20000000 0x30000>;
	};

	soc {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "simple-bus";
		ranges;

		pcc0: clock-controller@4002b000 {
			compatible = "openisa,rv32m1-pcc";
			clock-controller;
			reg = <0x4002b000 0x200>;
			label = "PCC0";
			#clock-cells = <1>;
		};

		pcc1: clock-controller@41027000 {
			compatible = "openisa,rv32m1-pcc";
			clock-controller;
			reg = <0x41027000 0x200>;
			label = "PCC1";
			#clock-cells = <1>;
		};

		event: interrupt-controller@e0041000 {
			compatible = "openisa,rv32m1-event-unit";
			#interrupt-cells = <1>;
			interrupt-controller;
			reg = <0xe0041000 0x88>;
		};

		intmux: interrupt-controller@4004f000 {
			compatible = "openisa,rv32m1-intmux";
			#interrupt-cells = <1>;
			interrupt-controller;
			interrupt-parent = <&event>;
			interrupts = <INTMUX_CH0_IRQ>, <INTMUX_CH1_IRQ>, <INTMUX_CH2_IRQ>, <INTMUX_CH3_IRQ>, <INTMUX_CH4_IRQ>, <INTMUX_CH5_IRQ>, <INTMUX_CH6_IRQ>, <INTMUX_CH7_IRQ>;
			reg = <0x4004f000 0x20>;
			clocks = <&pcc0 0x13c>;
			label = "INTMUX0";
		};

		/*
		 * INTMUX channels below are somewhat arbitrary.
		 *
		 * The system timer (assumed at LPTMR0) is placed on channel 0,
		 * and peripherals are in channel 1. This can be overridden with
		 * overlays, e.g. to manage IRQ priorities, and it'll will Just
		 * Work, but using fewer channels here allows disabling unused
		 * ones in Kconfig, making the binary smaller.
		 *
		 * Each enabled channel requires 256 bytes in _sw_isr_table,
		 * so the savings for disabling channels can add up.
		 */

		lptmr0: timer@40032000 {
			compatible = "openisa,rv32m1-lptmr";
			reg = <0x40032000 0x10>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 7)>;
			label = "LPTMR_0";
		};

		lptmr1: timer@40033000 {
			compatible = "openisa,rv32m1-lptmr";
			reg = <0x40033000 0x10>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 8)>;
			label = "LPTMR_1";
		};

		lptmr2: timer@4102b000 {
			compatible = "openisa,rv32m1-lptmr";
			reg = <0x4102b000 0x10>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 22)>;
			label = "LPTMR_2";
		};

		pinmux_a: pinmux@40046000 {
			compatible = "openisa,rv32m1-pinmux";
			reg = <0x40046000 0xd0>;
			clocks = <&pcc0 0x118>;
		};

		pinmux_b: pinmux@40047000 {
			compatible = "openisa,rv32m1-pinmux";
			reg = <0x40047000 0xd0>;
			clocks = <&pcc0 0x11c>;
		};

		pinmux_c: pinmux@40048000 {
			compatible = "openisa,rv32m1-pinmux";
			reg = <0x40048000 0xd0>;
			clocks = <&pcc0 0x120>;
		};

		pinmux_d: pinmux@40049000 {
			compatible = "openisa,rv32m1-pinmux";
			reg = <0x40049000 0xd0>;
			clocks = <&pcc0 0x124>;
		};

		pinmux_e: pinmux@41037000 {
			compatible = "openisa,rv32m1-pinmux";
			reg = <0x41037000 0xd0>;
			clocks = <&pcc1 0xdc>;
		};

		gpioa: gpio@48020000 {
			compatible = "openisa,rv32m1-gpio";
			reg = <0x48020000 0x14>;
			interrupt-parent = <&event>;
			interrupts = <18>;
			label = "GPIO_0";
			gpio-controller;
			#gpio-cells = <2>;
		};

		gpiob: gpio@48020040 {
			compatible = "openisa,rv32m1-gpio";
			reg = <0x48020040 0x14>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 15)>;
			label = "GPIO_1";
			gpio-controller;
			#gpio-cells = <2>;
		};

		gpioc: gpio@48020080 {
			compatible = "openisa,rv32m1-gpio";
			reg = <0x48020080 0x14>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 16)>;
			label = "GPIO_2";
			gpio-controller;
			#gpio-cells = <2>;
		};

		gpiod: gpio@480200c0 {
			compatible = "openisa,rv32m1-gpio";
			reg = <0x480200c0 0x14>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 17)>;
			label = "GPIO_3";
			gpio-controller;
			#gpio-cells = <2>;
		};

		gpioe: gpio@4100f000 {
			compatible = "openisa,rv32m1-gpio";
			reg = <0x4100f000 0x14>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 27)>;
			label = "GPIO_4";
			gpio-controller;
			#gpio-cells = <2>;
			clocks = <&pcc1 0x3c>;
		};

		uart0: lpuart@40042000 {
			compatible = "openisa,rv32m1-lpuart";
			reg = <0x40042000 0x2c>;
			interrupt-parent = <&event>;
			interrupts = <17>;
			clocks = <&pcc0 0x108>;
			label = "UART_0";
			status = "disabled";
		};

		uart1: lpuart@40043000 {
			compatible = "openisa,rv32m1-lpuart";
			reg = <0x40043000 0x2c>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 13)>;
			clocks = <&pcc0 0x10c>;
			label = "UART_1";
			status = "disabled";
		};

		uart2: lpuart@40044000 {
			compatible = "openisa,rv32m1-lpuart";
			reg = <0x40044000 0x2c>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 14)>;
			clocks = <&pcc0 0x110>;
			label = "UART_2";
			status = "disabled";
		};

		uart3: lpuart@41036000 {
			compatible = "openisa,rv32m1-lpuart";
			reg = <0x41036000 0x2c>;
			interrupt-parent = <&intmux>;
			interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 26)>;
			clocks = <&pcc0 0xd8>;
			label = "UART_3";
			status = "disabled";
		};
	};
};