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