arch/arc/boot/dts/axc003.dtsi

   1 /*
   2  * Copyright (C) 2014-15 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 AXC003 CPU card: HS38x UP configuration
  11  */
  12
  13 /include/ "skeleton_hs.dtsi"
  14
  15 / {
  16         compatible = "snps,arc";
  17         #address-cells = <2>;
  18         #size-cells = <2>;
  19
  20         cpu_card {
  21                 compatible = "simple-bus";
  22                 #address-cells = <1>;
  23                 #size-cells = <1>;
  24
  25                 ranges = <0x00000000 0x0 0xf0000000 0x10000000>;
  26
  27                 core_clk: core_clk {
  28                         #clock-cells = <0>;
  29                         compatible = "fixed-clock";
  30                         clock-frequency = <90000000>;
  31                 };
  32
  33                 core_intc: archs-intc@cpu {
  34                         compatible = "snps,archs-intc";
  35                         interrupt-controller;
  36                         #interrupt-cells = <1>;
  37                 };
  38
  39                 /*
  40                  * this GPIO block ORs all interrupts on CPU card (creg,..)
  41                  * to uplink only 1 IRQ to ARC core intc
  42                  */
  43                 dw-apb-gpio@0x2000 {
  44                         compatible = "snps,dw-apb-gpio";
  45                         reg = < 0x2000 0x80 >;
  46                         #address-cells = <1>;
  47                         #size-cells = <0>;
  48
  49                         ictl_intc: gpio-controller@0 {
  50                                 compatible = "snps,dw-apb-gpio-port";
  51                                 gpio-controller;
  52                                 #gpio-cells = <2>;
  53                                 snps,nr-gpios = <30>;
  54                                 reg = <0>;
  55                                 interrupt-controller;
  56                                 #interrupt-cells = <2>;
  57                                 interrupt-parent = <&core_intc>;
  58                                 interrupts = <25>;
  59                         };
  60                 };
  61
  62                 debug_uart: dw-apb-uart@0x5000 {
  63                         compatible = "snps,dw-apb-uart";
  64                         reg = <0x5000 0x100>;
  65                         clock-frequency = <33333000>;
  66                         interrupt-parent = <&ictl_intc>;
  67                         interrupts = <2 4>;
  68                         baud = <115200>;
  69                         reg-shift = <2>;
  70                         reg-io-width = <4>;
  71                 };
  72
  73                 arcpct0: pct {
  74                         compatible = "snps,archs-pct";
  75                         #interrupt-cells = <1>;
  76                         interrupt-parent = <&core_intc>;
  77                         interrupts = <20>;
  78                 };
  79         };
  80
  81         /*
  82          * The DW APB ICTL intc on MB is connected to CPU intc via a
  83          * DT "invisible" DW APB GPIO block, configured to simply pass thru
  84          * interrupts - setup accordinly in platform init (plat-axs10x/ax10x.c)
  85          *
  86          * So here we mimic a direct connection betwen them, ignoring the
  87          * ABPG GPIO. Thus set "interrupts = <24>" (DW APB GPIO to core)
  88          * instead of "interrupts = <12>" (DW APB ICTL to DW APB GPIO)
  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: dw-apb-ictl@0xe0012000 {
  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 = < 24 >;
 101         };
 102
 103         memory {
 104                 device_type = "memory";
 105                 /* CONFIG_KERNEL_RAM_BASE_ADDRESS needs to match low mem start */
 106                 reg = <0x0 0x80000000 0x0 0x20000000    /* 512 MiB low mem */
 107                        0x1 0xc0000000 0x0 0x40000000>;  /* 1 GiB highmem */
 108         };
 109
 110         reserved-memory {
 111                 #address-cells = <2>;
 112                 #size-cells = <2>;
 113                 ranges;
 114                 /*
 115                  * Move frame buffer out of IOC aperture (0x8z-0xAz).
 116                  */
 117                 frame_buffer: frame_buffer@be000000 {
 118                         compatible = "shared-dma-pool";
 119                         reg = <0x0 0xbe000000 0x0 0x2000000>;
 120                         no-map;
 121                 };
 122         };
 123 };