// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
*/
/*
* Device tree for AXC001 770D/EM6/AS221 CPU card
* Note that this file only supports the 770D CPU
*/
/include/ "skeleton.dtsi"
/ {
compatible = "snps,arc";
#address-cells = <2>;
#size-cells = <2>;
cpu_card {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0x0 0xf0000000 0x10000000>;
core_clk: core_clk {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <750000000>;
};
input_clk: input-clk {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <33333333>;
};
core_intc: arc700-intc@cpu {
compatible = "snps,arc700-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
/*
* this GPIO block ORs all interrupts on CPU card (creg,..)
* to uplink only 1 IRQ to ARC core intc
*/
dw-apb-gpio@2000 {
compatible = "snps,dw-apb-gpio";
reg = < 0x2000 0x80 >;
#address-cells = <1>;
#size-cells = <0>;
ictl_intc: gpio-controller@0 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <30>;
reg = <0>;
interrupt-controller;
#interrupt-cells = <2>;
interrupt-parent = <&core_intc>;
interrupts = <15>;
};
};
debug_uart: dw-apb-uart@5000 {
compatible = "snps,dw-apb-uart";
reg = <0x5000 0x100>;
clock-frequency = <33333000>;
interrupt-parent = <&ictl_intc>;
interrupts = <19 4>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
arcpct0: pct {
compatible = "snps,arc700-pct";
};
};
/*
* This INTC is actually connected to DW APB GPIO
* which acts as a wire between MB INTC and CPU INTC.
* GPIO INTC is configured in platform init code
* and here we mimic direct connection from MB INTC to
* CPU INTC, thus we set "interrupts = <7>" instead of
* "interrupts = <12>"
*
* This intc actually resides on MB, but we move it here to
* avoid duplicating the MB dtsi file given that IRQ from
* this intc to cpu intc are different for axs101 and axs103
*/
mb_intc: interrupt-controller@e0012000 {
#interrupt-cells = <1>;
compatible = "snps,dw-apb-ictl";
reg = < 0x0 0xe0012000 0x0 0x200 >;
interrupt-controller;
interrupt-parent = <&core_intc>;
interrupts = < 7 >;
};
memory {
device_type = "memory";
/* CONFIG_LINUX_RAM_BASE needs to match low mem start */
reg = <0x0 0x80000000 0x0 0x1b000000>; /* (512 - 32) MiB */
};
reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;
/*
* We just move frame buffer area to the very end of
* available DDR. And even though in case of ARC770 there's
* no strict requirement for a frame-buffer to be in any
* particular location it allows us to use the same
* base board's DT node for ARC PGU as for ARc HS38.
*/
frame_buffer: frame_buffer@9e000000 {
compatible = "shared-dma-pool";
reg = <0x0 0x9e000000 0x0 0x2000000>;
no-map;
};
};
};
Codebase Browser
linux