xref: /linux/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml (revision 702648721db590b3425c31ade294000e18808345) 
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
7title: Rockchip designware mobile storage host controller
8
9description:
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
16allOf:
17  - $ref: synopsys-dw-mshc-common.yaml#
18
19maintainers:
20  - Heiko Stuebner <heiko@sntech.de>
21
22# Everything else is described in the common file
23properties:
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
98required:
99  - compatible
100  - reg
101  - interrupts
102  - clocks
103  - clock-names
104
105unevaluatedProperties: false
106
107examples:
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...
126