renesas,bsc.yaml

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    1 %YAML 1.2
    2 ---
    3 $id: http://devicetree.org/schemas/bus/renesas,bsc.yaml#
    4 $schema: http://devicetree.org/meta-schemas/core.yaml#
    5 
    6 title: Renesas Bus State Controller (BSC)
    7 
    8 maintainers:
    9   - Geert Uytterhoeven <geert+renesas@glider.be>
   10 
   11 description: |
   12   The Renesas Bus State Controller (BSC, sometimes called "LBSC within Bus
   13   Bridge", or "External Bus Interface") can be found in several Renesas ARM
   14   SoCs.  It provides an external bus for connecting multiple external
   15   devices to the SoC, driving several chip select lines, for e.g. NOR
   16   FLASH, Ethernet and USB.
   17 
   18   While the BSC is a fairly simple memory-mapped bus, it may be part of a
   19   PM domain, and may have a gateable functional clock.  Before a device
   20   connected to the BSC can be accessed, the PM domain containing the BSC
   21   must be powered on, and the functional clock driving the BSC must be
   22   enabled.
   23 
   24   The bindings for the BSC extend the bindings for "simple-pm-bus".
   25 
   26 allOf:
   27   - $ref: simple-pm-bus.yaml#
   28 
   29 properties:
   30   compatible:
   31     items:
   32       - enum:
   33           - renesas,bsc-r8a73a4  # R-Mobile APE6 (r8a73a4)
   34           - renesas,bsc-sh73a0   # SH-Mobile AG5 (sh73a0)
   35       - const: renesas,bsc
   36       - {} # simple-pm-bus, but not listed here to avoid false select
   37 
   38   reg:
   39     maxItems: 1
   40 
   41   interrupts:
   42     maxItems: 1
   43 
   44 required:
   45   - reg
   46 
   47 unevaluatedProperties: false
   48 
   49 examples:
   50   - |
   51     #include <dt-bindings/interrupt-controller/irq.h>
   52 
   53     bsc: bus@fec10000 {
   54         compatible = "renesas,bsc-sh73a0", "renesas,bsc", "simple-pm-bus";
   55         #address-cells = <1>;
   56         #size-cells = <1>;
   57         ranges = <0 0 0x20000000>;
   58         reg = <0xfec10000 0x400>;
   59         interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>;
   60         clocks = <&zb_clk>;
   61         power-domains = <&pd_a4s>;
   62     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/bus/renesas,bsc.yaml

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sys/contrib/device-tree/Bindings/bus/renesas,bsc.yaml