Documentation/devicetree/bindings/bus/sun50i-de2-bus.txt

   1 Device tree bindings for Allwinner DE2/3 bus
   2
   3 The Allwinner A64 DE2 is on a special bus, which needs a SRAM region (SRAM C)
   4 to be claimed for enabling the access. The DE3 on Allwinner H6 is at the same
   5 situation, and the binding also applies.
   6
   7 Required properties:
   8
   9  - compatible:          Should be one of:
  10                                 - "allwinner,sun50i-a64-de2"
  11                                 - "allwinner,sun50i-h6-de3", "allwinner,sun50i-a64-de2"
  12  - reg:                 A resource specifier for the register space
  13  - #address-cells:      Must be set to 1
  14  - #size-cells:         Must be set to 1
  15  - ranges:              Must be set up to map the address space inside the
  16                         DE2, for the sub-blocks of DE2.
  17  - allwinner,sram:      the SRAM that needs to be claimed
  18
  19 Example:
  20
  21         de2@1000000 {
  22                 compatible = "allwinner,sun50i-a64-de2";
  23                 reg = <0x1000000 0x400000>;
  24                 allwinner,sram = <&de2_sram 1>;
  25                 #address-cells = <1>;
  26                 #size-cells = <1>;
  27                 ranges = <0 0x1000000 0x400000>;
  28
  29                 display_clocks: clock@0 {
  30                         compatible = "allwinner,sun50i-a64-de2-clk";
  31                         reg = <0x0 0x100000>;
  32                         clocks = <&ccu CLK_DE>,
  33                                  <&ccu CLK_BUS_DE>;
  34                         clock-names = "mod",
  35                                       "bus";
  36                         resets = <&ccu RST_BUS_DE>;
  37                         #clock-cells = <1>;
  38                         #reset-cells = <1>;
  39                 };
  40         };