rockchip-dw-mshc.yaml

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    1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/mmc/rockchip-dw-mshc.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Rockchip designware mobile storage host controller device tree bindings
    8 
    9 description:
   10   Rockchip uses the Synopsys designware mobile storage host controller
   11   to interface a SoC with storage medium such as eMMC or SD/MMC cards.
   12   This file documents the combined properties for the core Synopsys dw mshc
   13   controller that are not already included in the synopsys-dw-mshc-common.yaml
   14   file and the Rockchip specific extensions.
   15 
   16 allOf:
   17   - $ref: "synopsys-dw-mshc-common.yaml#"
   18 
   19 maintainers:
   20   - Heiko Stuebner <heiko@sntech.de>
   21 
   22 # Everything else is described in the common file
   23 properties:
   24   compatible:
   25     oneOf:
   26       # for Rockchip RK2928 and before RK3288
   27       - const: rockchip,rk2928-dw-mshc
   28       # for Rockchip RK3288
   29       - const: rockchip,rk3288-dw-mshc
   30       - items:
   31           - enum:
   32               - rockchip,px30-dw-mshc
   33               - rockchip,rk1808-dw-mshc
   34               - rockchip,rk3036-dw-mshc
   35               - rockchip,rk3228-dw-mshc
   36               - rockchip,rk3308-dw-mshc
   37               - rockchip,rk3328-dw-mshc
   38               - rockchip,rk3368-dw-mshc
   39               - rockchip,rk3399-dw-mshc
   40               - rockchip,rk3568-dw-mshc
   41               - rockchip,rv1108-dw-mshc
   42               - rockchip,rv1126-dw-mshc
   43           - const: rockchip,rk3288-dw-mshc
   44 
   45   reg:
   46     maxItems: 1
   47 
   48   interrupts:
   49     maxItems: 1
   50 
   51   clocks:
   52     minItems: 2
   53     maxItems: 4
   54     description:
   55       Handle to "biu" and "ciu" clocks for the bus interface unit clock and
   56       the card interface unit clock. If "ciu-drive" and "ciu-sample" are
   57       specified in clock-names, it should also contain
   58       handles to these clocks.
   59 
   60   clock-names:
   61     minItems: 2
   62     items:
   63       - const: biu
   64       - const: ciu
   65       - const: ciu-drive
   66       - const: ciu-sample
   67     description:
   68       Apart from the clock-names "biu" and "ciu" two more clocks
   69       "ciu-drive" and "ciu-sample" are supported. They are used
   70       to control the clock phases, "ciu-sample" is required for tuning
   71       high speed modes.
   72 
   73   rockchip,default-sample-phase:
   74     $ref: /schemas/types.yaml#/definitions/uint32
   75     minimum: 0
   76     maximum: 360
   77     default: 0
   78     description:
   79       The default phase to set "ciu-sample" at probing,
   80       low speeds or in case where all phases work at tuning time.
   81       If not specified 0 deg will be used.
   82 
   83   rockchip,desired-num-phases:
   84     $ref: /schemas/types.yaml#/definitions/uint32
   85     minimum: 0
   86     maximum: 360
   87     default: 360
   88     description:
   89       The desired number of times that the host execute tuning when needed.
   90       If not specified, the host will do tuning for 360 times,
   91       namely tuning for each degree.
   92 
   93 required:
   94   - compatible
   95   - reg
   96   - interrupts
   97   - clocks
   98   - clock-names
   99 
  100 unevaluatedProperties: false
  101 
  102 examples:
  103   - |
  104     #include <dt-bindings/clock/rk3288-cru.h>
  105     #include <dt-bindings/interrupt-controller/arm-gic.h>
  106     #include <dt-bindings/interrupt-controller/irq.h>
  107     sdmmc: mmc@ff0c0000 {
  108       compatible = "rockchip,rk3288-dw-mshc";
  109       reg = <0xff0c0000 0x4000>;
  110       interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
  111       clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>,
  112                <&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>;
  113       clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
  114       resets = <&cru SRST_MMC0>;
  115       reset-names = "reset";
  116       fifo-depth = <0x100>;
  117       max-frequency = <150000000>;
  118     };
  119 
  120 ...

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