bindings/mmc/rockchip-dw-mshc.yaml

   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
   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,rk3128-dw-mshc
  36               - rockchip,rk3228-dw-mshc
  37               - rockchip,rk3308-dw-mshc
  38               - rockchip,rk3328-dw-mshc
  39               - rockchip,rk3368-dw-mshc
  40               - rockchip,rk3399-dw-mshc
  41               - rockchip,rk3568-dw-mshc
  42               - rockchip,rk3588-dw-mshc
  43               - rockchip,rv1108-dw-mshc
  44               - rockchip,rv1126-dw-mshc
  45           - const: rockchip,rk3288-dw-mshc
  46
  47   reg:
  48     maxItems: 1
  49
  50   interrupts:
  51     maxItems: 1
  52
  53   clocks:
  54     minItems: 2
  55     maxItems: 4
  56     description:
  57       Handle to "biu" and "ciu" clocks for the bus interface unit clock and
  58       the card interface unit clock. If "ciu-drive" and "ciu-sample" are
  59       specified in clock-names, it should also contain
  60       handles to these clocks.
  61
  62   clock-names:
  63     minItems: 2
  64     items:
  65       - const: biu
  66       - const: ciu
  67       - const: ciu-drive
  68       - const: ciu-sample
  69     description:
  70       Apart from the clock-names "biu" and "ciu" two more clocks
  71       "ciu-drive" and "ciu-sample" are supported. They are used
  72       to control the clock phases, "ciu-sample" is required for tuning
  73       high speed modes.
  74
  75   power-domains:
  76     maxItems: 1
  77
  78   rockchip,default-sample-phase:
  79     $ref: /schemas/types.yaml#/definitions/uint32
  80     minimum: 0
  81     maximum: 360
  82     default: 0
  83     description:
  84       The default phase to set "ciu-sample" at probing,
  85       low speeds or in case where all phases work at tuning time.
  86       If not specified 0 deg will be used.
  87
  88   rockchip,desired-num-phases:
  89     $ref: /schemas/types.yaml#/definitions/uint32
  90     minimum: 0
  91     maximum: 360
  92     default: 360
  93     description:
  94       The desired number of times that the host execute tuning when needed.
  95       If not specified, the host will do tuning for 360 times,
  96       namely tuning for each degree.
  97
  98 required:
  99   - compatible
 100   - reg
 101   - interrupts
 102   - clocks
 103   - clock-names
 104
 105 unevaluatedProperties: false
 106
 107 examples:
 108   - |
 109     #include <dt-bindings/clock/rk3288-cru.h>
 110     #include <dt-bindings/interrupt-controller/arm-gic.h>
 111     #include <dt-bindings/interrupt-controller/irq.h>
 112     sdmmc: mmc@ff0c0000 {
 113       compatible = "rockchip,rk3288-dw-mshc";
 114       reg = <0xff0c0000 0x4000>;
 115       interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
 116       clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>,
 117                <&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>;
 118       clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
 119       resets = <&cru SRST_MMC0>;
 120       reset-names = "reset";
 121       fifo-depth = <0x100>;
 122       max-frequency = <150000000>;
 123     };
 124
 125 ...