arch/arc/boot/dts/axc001.dtsi

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