xref: /linux/Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml (revision 6fdcba32711044c35c0e1b094cbd8f3f0b4472c9) 
1# SPDX-License-Identifier: GPL-2.0-or-later
2# Copyright 2019 IBM Corp.
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/mmc/aspeed,sdhci.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: ASPEED SD/SDIO/MMC Controller
9
10maintainers:
11  - Andrew Jeffery <andrew@aj.id.au>
12  - Ryan Chen <ryanchen.aspeed@gmail.com>
13
14description: |+
15  The ASPEED SD/SDIO/eMMC controller exposes two slots implementing the SDIO
16  Host Specification v2.00, with 1 or 4 bit data buses, or an 8 bit data bus if
17  only a single slot is enabled.
18
19  The two slots are supported by a common configuration area. As the SDHCIs for
20  the slots are dependent on the common configuration area, they are described
21  as child nodes.
22
23properties:
24  compatible:
25    enum:
26      - aspeed,ast2400-sd-controller
27      - aspeed,ast2500-sd-controller
28      - aspeed,ast2600-sd-controller
29  reg:
30    maxItems: 1
31    description: Common configuration registers
32  "#address-cells":
33    const: 1
34  "#size-cells":
35    const: 1
36  ranges: true
37  clocks:
38    maxItems: 1
39    description: The SD/SDIO controller clock gate
40
41patternProperties:
42  "^sdhci@[0-9a-f]+$":
43    type: object
44    allOf:
45        - $ref: mmc-controller.yaml
46    properties:
47      compatible:
48        enum:
49          - aspeed,ast2400-sdhci
50          - aspeed,ast2500-sdhci
51          - aspeed,ast2600-sdhci
52      reg:
53        maxItems: 1
54        description: The SDHCI registers
55      clocks:
56        maxItems: 1
57        description: The SD bus clock
58      interrupts:
59        maxItems: 1
60        description: The SD interrupt shared between both slots
61      sdhci,auto-cmd12:
62        type: boolean
63        description: Specifies that controller should use auto CMD12
64    required:
65      - compatible
66      - reg
67      - clocks
68      - interrupts
69
70additionalProperties: false
71
72required:
73  - compatible
74  - reg
75  - "#address-cells"
76  - "#size-cells"
77  - ranges
78  - clocks
79
80examples:
81  - |
82    #include <dt-bindings/clock/aspeed-clock.h>
83    sdc@1e740000 {
84            compatible = "aspeed,ast2500-sd-controller";
85            reg = <0x1e740000 0x100>;
86            #address-cells = <1>;
87            #size-cells = <1>;
88            ranges = <0 0x1e740000 0x20000>;
89            clocks = <&syscon ASPEED_CLK_GATE_SDCLK>;
90
91            sdhci0: sdhci@100 {
92                    compatible = "aspeed,ast2500-sdhci";
93                    reg = <0x100 0x100>;
94                    interrupts = <26>;
95                    sdhci,auto-cmd12;
96                    clocks = <&syscon ASPEED_CLK_SDIO>;
97            };
98
99            sdhci1: sdhci@200 {
100                    compatible = "aspeed,ast2500-sdhci";
101                    reg = <0x200 0x100>;
102                    interrupts = <26>;
103                    sdhci,auto-cmd12;
104                    clocks = <&syscon ASPEED_CLK_SDIO>;
105            };
106    };
107