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1%YAML 1.22---3$id: http://devicetree.org/schemas/bus/renesas,bsc.yaml#4$schema: http://devicetree.org/meta-schemas/core.yaml#5 6title: Renesas Bus State Controller (BSC)7 8maintainers:9 - Geert Uytterhoeven <geert+renesas@glider.be>10 11description: |12 The Renesas Bus State Controller (BSC, sometimes called "LBSC within Bus13 Bridge", or "External Bus Interface") can be found in several Renesas ARM14 SoCs. It provides an external bus for connecting multiple external15 devices to the SoC, driving several chip select lines, for e.g. NOR16 FLASH, Ethernet and USB.17 18 While the BSC is a fairly simple memory-mapped bus, it may be part of a19 PM domain, and may have a gateable functional clock. Before a device20 connected to the BSC can be accessed, the PM domain containing the BSC21 must be powered on, and the functional clock driving the BSC must be22 enabled.23 24 The bindings for the BSC extend the bindings for "simple-pm-bus".25 26allOf:27 - $ref: simple-pm-bus.yaml#28 29properties: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,bsc36 - {} # simple-pm-bus, but not listed here to avoid false select37 38 reg:39 maxItems: 140 41 interrupts:42 maxItems: 143 44required:45 - reg46 47unevaluatedProperties: false48 49examples: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 };63