arch/riscv/boot/dts/kendryte/k210.dtsi

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2019 Sean Anderson <seanga2@gmail.com>
   4  * Copyright (C) 2020 Western Digital Corporation or its affiliates.
   5  */
   6 #include <dt-bindings/clock/k210-clk.h>
   7
   8 / {
   9         /*
  10          * Although the K210 is a 64-bit CPU, the address bus is only 32-bits
  11          * wide, and the upper half of all addresses is ignored.
  12          */
  13         #address-cells = <1>;
  14         #size-cells = <1>;
  15         compatible = "kendryte,k210";
  16
  17         aliases {
  18                 serial0 = &uarths0;
  19         };
  20
  21         /*
  22          * The K210 has an sv39 MMU following the priviledge specification v1.9.
  23          * Since this is a non-ratified draft specification, the kernel does not
  24          * support it and the K210 support enabled only for the !MMU case.
  25          * Be consistent with this by setting the CPUs MMU type to "none".
  26          */
  27         cpus {
  28                 #address-cells = <1>;
  29                 #size-cells = <0>;
  30                 timebase-frequency = <7800000>;
  31                 cpu0: cpu@0 {
  32                         device_type = "cpu";
  33                         reg = <0>;
  34                         compatible = "kendryte,k210", "sifive,rocket0", "riscv";
  35                         riscv,isa = "rv64imafdc";
  36                         mmu-type = "none";
  37                         i-cache-size = <0x8000>;
  38                         i-cache-block-size = <64>;
  39                         d-cache-size = <0x8000>;
  40                         d-cache-block-size = <64>;
  41                         clocks = <&sysctl K210_CLK_CPU>;
  42                         clock-frequency = <390000000>;
  43                         cpu0_intc: interrupt-controller {
  44                                 #interrupt-cells = <1>;
  45                                 interrupt-controller;
  46                                 compatible = "riscv,cpu-intc";
  47                         };
  48                 };
  49                 cpu1: cpu@1 {
  50                         device_type = "cpu";
  51                         reg = <1>;
  52                         compatible = "kendryte,k210", "sifive,rocket0", "riscv";
  53                         riscv,isa = "rv64imafdc";
  54                         mmu-type = "none";
  55                         i-cache-size = <0x8000>;
  56                         i-cache-block-size = <64>;
  57                         d-cache-size = <0x8000>;
  58                         d-cache-block-size = <64>;
  59                         clocks = <&sysctl K210_CLK_CPU>;
  60                         clock-frequency = <390000000>;
  61                         cpu1_intc: interrupt-controller {
  62                                 #interrupt-cells = <1>;
  63                                 interrupt-controller;
  64                                 compatible = "riscv,cpu-intc";
  65                         };
  66                 };
  67         };
  68
  69         sram: memory@80000000 {
  70                 device_type = "memory";
  71                 reg = <0x80000000 0x400000>,
  72                       <0x80400000 0x200000>,
  73                       <0x80600000 0x200000>;
  74                 reg-names = "sram0", "sram1", "aisram";
  75         };
  76
  77         clocks {
  78                 in0: oscillator {
  79                         compatible = "fixed-clock";
  80                         #clock-cells = <0>;
  81                         clock-frequency = <26000000>;
  82                 };
  83         };
  84
  85         soc {
  86                 #address-cells = <1>;
  87                 #size-cells = <1>;
  88                 compatible = "kendryte,k210-soc", "simple-bus";
  89                 ranges;
  90                 interrupt-parent = <&plic0>;
  91
  92                 sysctl: sysctl@50440000 {
  93                         compatible = "kendryte,k210-sysctl", "simple-mfd";
  94                         reg = <0x50440000 0x1000>;
  95                         #clock-cells = <1>;
  96                 };
  97
  98                 clint0: clint@2000000 {
  99                         #interrupt-cells = <1>;
 100                         compatible = "riscv,clint0";
 101                         reg = <0x2000000 0xC000>;
 102                         interrupts-extended =  <&cpu0_intc 3 &cpu0_intc 7
 103                                                 &cpu1_intc 3 &cpu1_intc 7>;
 104                         clocks = <&sysctl K210_CLK_ACLK>;
 105                 };
 106
 107                 plic0: interrupt-controller@c000000 {
 108                         #interrupt-cells = <1>;
 109                         interrupt-controller;
 110                         compatible = "kendryte,k210-plic0", "riscv,plic0";
 111                         reg = <0xC000000 0x4000000>;
 112                         interrupts-extended = <&cpu0_intc 11>, <&cpu0_intc 0xffffffff>,
 113                                               <&cpu1_intc 11>, <&cpu1_intc 0xffffffff>;
 114                         riscv,ndev = <65>;
 115                         riscv,max-priority = <7>;
 116                 };
 117
 118                 uarths0: serial@38000000 {
 119                         compatible = "kendryte,k210-uarths", "sifive,uart0";
 120                         reg = <0x38000000 0x1000>;
 121                         interrupts = <33>;
 122                         clocks = <&sysctl K210_CLK_CPU>;
 123                 };
 124         };
 125 };