1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
4 */
5
6 /*
7 * Device tree for AXC001 770D/EM6/AS221 CPU card
8 * Note that this file only supports the 770D CPU
9 */
10
11 /include/ "skeleton.dtsi"
12
13 / {
14 compatible = "snps,arc";
15 #address-cells = <2>;
16 #size-cells = <2>;
17
18 cpu_card {
19 compatible = "simple-bus";
20 #address-cells = <1>;
21 #size-cells = <1>;
22
23 ranges = <0x00000000 0x0 0xf0000000 0x10000000>;
24
25 core_clk: core_clk {
26 #clock-cells = <0>;
27 compatible = "fixed-clock";
28 clock-frequency = <750000000>;
29 };
30
31 input_clk: input-clk {
32 #clock-cells = <0>;
33 compatible = "fixed-clock";
34 clock-frequency = <33333333>;
35 };
36
37 core_intc: arc700-intc@cpu {
38 compatible = "snps,arc700-intc";
39 interrupt-controller;
40 #interrupt-cells = <1>;
41 };
42
43 /*
44 * this GPIO block ORs all interrupts on CPU card (creg,..)
45 * to uplink only 1 IRQ to ARC core intc
46 */
47 dw-apb-gpio@2000 {
48 compatible = "snps,dw-apb-gpio";
49 reg = < 0x2000 0x80 >;
50 #address-cells = <1>;
51 #size-cells = <0>;
52
53 ictl_intc: gpio-controller@0 {
54 compatible = "snps,dw-apb-gpio-port";
55 gpio-controller;
56 #gpio-cells = <2>;
57 snps,nr-gpios = <30>;
58 reg = <0>;
59 interrupt-controller;
60 #interrupt-cells = <2>;
61 interrupt-parent = <&core_intc>;
62 interrupts = <15>;
63 };
64 };
65
66 debug_uart: dw-apb-uart@5000 {
67 compatible = "snps,dw-apb-uart";
68 reg = <0x5000 0x100>;
69 clock-frequency = <33333000>;
70 interrupt-parent = <&ictl_intc>;
71 interrupts = <19 4>;
72 baud = <115200>;
73 reg-shift = <2>;
74 reg-io-width = <4>;
75 };
76
77 arcpct0: pct {
78 compatible = "snps,arc700-pct";
79 };
80 };
81
82 /*
83 * This INTC is actually connected to DW APB GPIO
84 * which acts as a wire between MB INTC and CPU INTC.
85 * GPIO INTC is configured in platform init code
86 * and here we mimic direct connection from MB INTC to
87 * CPU INTC, thus we set "interrupts = <7>" instead of
88 * "interrupts = <12>"
89 *
90 * This intc actually resides on MB, but we move it here to
91 * avoid duplicating the MB dtsi file given that IRQ from
92 * this intc to cpu intc are different for axs101 and axs103
93 */
94 mb_intc: interrupt-controller@e0012000 {
95 #interrupt-cells = <1>;
96 compatible = "snps,dw-apb-ictl";
97 reg = < 0x0 0xe0012000 0x0 0x200 >;
98 interrupt-controller;
99 interrupt-parent = <&core_intc>;
100 interrupts = < 7 >;
101 };
102
103 memory {
104 device_type = "memory";
105 /* CONFIG_LINUX_RAM_BASE needs to match low mem start */
106 reg = <0x0 0x80000000 0x0 0x1b000000>; /* (512 - 32) MiB */
107 };
108
109 reserved-memory {
110 #address-cells = <2>;
111 #size-cells = <2>;
112 ranges;
113 /*
114 * We just move frame buffer area to the very end of
115 * available DDR. And even though in case of ARC770 there's
116 * no strict requirement for a frame-buffer to be in any
117 * particular location it allows us to use the same
118 * base board's DT node for ARC PGU as for ARc HS38.
119 */
120 frame_buffer: frame_buffer@9e000000 {
121 compatible = "shared-dma-pool";
122 reg = <0x0 0x9e000000 0x0 0x2000000>;
123 no-map;
124 };
125 };
126 };
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