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62 lines
1.7 KiB
62 lines
1.7 KiB
%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/bus/renesas,bsc.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: Renesas Bus State Controller (BSC) |
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maintainers: |
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- Geert Uytterhoeven <[email protected]> |
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description: | |
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The Renesas Bus State Controller (BSC, sometimes called "LBSC within Bus |
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Bridge", or "External Bus Interface") can be found in several Renesas ARM |
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SoCs. It provides an external bus for connecting multiple external |
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devices to the SoC, driving several chip select lines, for e.g. NOR |
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FLASH, Ethernet and USB. |
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While the BSC is a fairly simple memory-mapped bus, it may be part of a |
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PM domain, and may have a gateable functional clock. Before a device |
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connected to the BSC can be accessed, the PM domain containing the BSC |
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must be powered on, and the functional clock driving the BSC must be |
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enabled. |
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The bindings for the BSC extend the bindings for "simple-pm-bus". |
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allOf: |
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- $ref: simple-pm-bus.yaml# |
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properties: |
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compatible: |
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items: |
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- enum: |
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- renesas,bsc-r8a73a4 # R-Mobile APE6 (r8a73a4) |
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- renesas,bsc-sh73a0 # SH-Mobile AG5 (sh73a0) |
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- const: renesas,bsc |
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- {} # simple-pm-bus, but not listed here to avoid false select |
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reg: |
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maxItems: 1 |
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interrupts: |
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maxItems: 1 |
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required: |
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- reg |
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unevaluatedProperties: false |
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examples: |
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- | |
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#include <dt-bindings/interrupt-controller/irq.h> |
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bsc: bus@fec10000 { |
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compatible = "renesas,bsc-sh73a0", "renesas,bsc", "simple-pm-bus"; |
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#address-cells = <1>; |
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#size-cells = <1>; |
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ranges = <0 0 0x20000000>; |
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reg = <0xfec10000 0x400>; |
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interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>; |
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clocks = <&zb_clk>; |
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power-domains = <&pd_a4s>; |
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};
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