Documentation/devicetree/bindings/sram/renesas,smp-sram.txt

   1 * Renesas SMP SRAM
   2
   3 Renesas R-Car Gen2 and RZ/G1 SoCs need a small piece of SRAM for the jump stub
   4 for secondary CPU bringup and CPU hotplug.
   5 This memory is reserved by adding a child node to a "mmio-sram" node, cfr.
   6 Documentation/devicetree/bindings/sram/sram.txt.
   7
   8 Required child node properties:
   9   - compatible: Must be "renesas,smp-sram",
  10   - reg: Address and length of the reserved SRAM.
  11     The full physical (bus) address must be aligned to a 256 KiB boundary.
  12
  13
  14 Example:
  15
  16         icram1: sram@e63c0000 {
  17                 compatible = "mmio-sram";
  18                 reg = <0 0xe63c0000 0 0x1000>;
  19                 #address-cells = <1>;
  20                 #size-cells = <1>;
  21                 ranges = <0 0 0xe63c0000 0x1000>;
  22
  23                 smp-sram@0 {
  24                         compatible = "renesas,smp-sram";
  25                         reg = <0 0x10>;
  26                 };
  27         };