The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/mtd/ti,am654-hbmc.txt

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    1 Bindings for HyperBus Memory Controller (HBMC) on TI's K3 family of SoCs
    2 
    3 Required properties:
    4 - compatible : "ti,am654-hbmc" for AM654 SoC
    5 - reg : Two entries:
    6         First entry pointed to the register space of HBMC controller
    7         Second entry pointing to the memory map region dedicated for
    8         MMIO access to attached flash devices
    9 - ranges : Address translation from offset within CS to allocated MMIO
   10            space in SoC
   11 
   12 Optional properties:
   13 - mux-controls : phandle to the multiplexer that controls selection of
   14                  HBMC vs OSPI inside Flash SubSystem (FSS). Default is OSPI,
   15                  if property is absent.
   16                  See Documentation/devicetree/bindings/mux/reg-mux.txt
   17                  for mmio-mux binding details
   18 
   19 Example:
   20 
   21         system-controller@47000000 {
   22                 compatible = "syscon", "simple-mfd";
   23                 reg = <0x0 0x47000000 0x0 0x100>;
   24                 #address-cells = <2>;
   25                 #size-cells = <2>;
   26                 ranges;
   27 
   28                 hbmc_mux: multiplexer {
   29                         compatible = "mmio-mux";
   30                         #mux-control-cells = <1>;
   31                         mux-reg-masks = <0x4 0x2>; /* 0: reg 0x4, bit 1 */
   32                 };
   33         };
   34 
   35         hbmc: hyperbus@47034000 {
   36                 compatible = "ti,am654-hbmc";
   37                 reg = <0x0 0x47034000 0x0 0x100>,
   38                         <0x5 0x00000000 0x1 0x0000000>;
   39                 power-domains = <&k3_pds 55>;
   40                 #address-cells = <2>;
   41                 #size-cells = <1>;
   42                 ranges = <0x0 0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */
   43                          <0x1 0x0 0x5 0x04000000 0x4000000>; /* CS1 - 64MB */
   44                 mux-controls = <&hbmc_mux 0>;
   45 
   46                 /* Slave flash node */
   47                 flash@0,0 {
   48                         compatible = "cypress,hyperflash", "cfi-flash";
   49                         reg = <0x0 0x0 0x4000000>;
   50                 };
   51         };

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