xref: /linux/Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0) 
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    $ref: mmc-controller.yaml
45    unevaluatedProperties: false
46
47    properties:
48      compatible:
49        enum:
50          - aspeed,ast2400-sdhci
51          - aspeed,ast2500-sdhci
52          - aspeed,ast2600-sdhci
53      reg:
54        maxItems: 1
55        description: The SDHCI registers
56      clocks:
57        maxItems: 1
58        description: The SD bus clock
59      interrupts:
60        maxItems: 1
61        description: The SD interrupt shared between both slots
62      sdhci,auto-cmd12:
63        type: boolean
64        description: Specifies that controller should use auto CMD12
65    required:
66      - compatible
67      - reg
68      - clocks
69      - interrupts
70
71additionalProperties: false
72
73required:
74  - compatible
75  - reg
76  - "#address-cells"
77  - "#size-cells"
78  - ranges
79  - clocks
80
81examples:
82  - |
83    #include <dt-bindings/clock/aspeed-clock.h>
84    sdc@1e740000 {
85            compatible = "aspeed,ast2500-sd-controller";
86            reg = <0x1e740000 0x100>;
87            #address-cells = <1>;
88            #size-cells = <1>;
89            ranges = <0 0x1e740000 0x20000>;
90            clocks = <&syscon ASPEED_CLK_GATE_SDCLK>;
91
92            sdhci0: sdhci@100 {
93                    compatible = "aspeed,ast2500-sdhci";
94                    reg = <0x100 0x100>;
95                    interrupts = <26>;
96                    sdhci,auto-cmd12;
97                    clocks = <&syscon ASPEED_CLK_SDIO>;
98            };
99
100            sdhci1: sdhci@200 {
101                    compatible = "aspeed,ast2500-sdhci";
102                    reg = <0x200 0x100>;
103                    interrupts = <26>;
104                    sdhci,auto-cmd12;
105                    clocks = <&syscon ASPEED_CLK_SDIO>;
106            };
107    };
108