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