aspeed,sdhci.yaml

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    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 $schema: http://devicetree.org/meta-schemas/core.yaml#
    7 
    8 title: ASPEED SD/SDIO/MMC Controller
    9 
   10 maintainers:
   11   - Andrew Jeffery <andrew@aj.id.au>
   12   - Ryan Chen <ryanchen.aspeed@gmail.com>
   13 
   14 description: |+
   15   The ASPEED SD/SDIO/eMMC controller exposes two slots implementing the SDIO
   16   Host Specification v2.00, with 1 or 4 bit data buses, or an 8 bit data bus if
   17   only a single slot is enabled.
   18 
   19   The two slots are supported by a common configuration area. As the SDHCIs for
   20   the slots are dependent on the common configuration area, they are described
   21   as child nodes.
   22 
   23 properties:
   24   compatible:
   25     enum:
   26       - aspeed,ast2400-sd-controller
   27       - aspeed,ast2500-sd-controller
   28       - aspeed,ast2600-sd-controller
   29   reg:
   30     maxItems: 1
   31     description: Common configuration registers
   32   "#address-cells":
   33     const: 1
   34   "#size-cells":
   35     const: 1
   36   ranges: true
   37   clocks:
   38     maxItems: 1
   39     description: The SD/SDIO controller clock gate
   40 
   41 patternProperties:
   42   "^sdhci@[0-9a-f]+$":
   43     type: object
   44     $ref: mmc-controller.yaml
   45 
   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 
   70 additionalProperties: false
   71 
   72 required:
   73   - compatible
   74   - reg
   75   - "#address-cells"
   76   - "#size-cells"
   77   - ranges
   78   - clocks
   79 
   80 examples:
   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     };

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