1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/mmc/cdns,sdhci.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Cadence SD/SDIO/eMMC Host Controller (SD4HC)
8
9 maintainers:
10 - Masahiro Yamada <yamada.masahiro@socionext.com>
11
12 properties:
13 compatible:
14 items:
15 - enum:
16 - amd,pensando-elba-sd4hc
17 - microchip,mpfs-sd4hc
18 - socionext,uniphier-sd4hc
19 - const: cdns,sd4hc
20
21 reg:
22 minItems: 1
23 maxItems: 2
24
25 interrupts:
26 maxItems: 1
27
28 clocks:
29 maxItems: 1
30
31 resets:
32 maxItems: 1
33
34 # PHY DLL input delays:
35 # They are used to delay the data valid window, and align the window to
36 # sampling clock. The delay starts from 5ns (for delay parameter equal to 0)
37 # and it is increased by 2.5ns in each step.
38
39 cdns,phy-input-delay-sd-highspeed:
40 description: Value of the delay in the input path for SD high-speed timing
41 $ref: /schemas/types.yaml#/definitions/uint32
42 minimum: 0
43 maximum: 0x1f
44
45 cdns,phy-input-delay-legacy:
46 description: Value of the delay in the input path for legacy timing
47 $ref: /schemas/types.yaml#/definitions/uint32
48 minimum: 0
49 maximum: 0x1f
50
51 cdns,phy-input-delay-sd-uhs-sdr12:
52 description: Value of the delay in the input path for SD UHS SDR12 timing
53 $ref: /schemas/types.yaml#/definitions/uint32
54 minimum: 0
55 maximum: 0x1f
56
57 cdns,phy-input-delay-sd-uhs-sdr25:
58 description: Value of the delay in the input path for SD UHS SDR25 timing
59 $ref: /schemas/types.yaml#/definitions/uint32
60 minimum: 0
61 maximum: 0x1f
62
63 cdns,phy-input-delay-sd-uhs-sdr50:
64 description: Value of the delay in the input path for SD UHS SDR50 timing
65 $ref: /schemas/types.yaml#/definitions/uint32
66 minimum: 0
67 maximum: 0x1f
68
69 cdns,phy-input-delay-sd-uhs-ddr50:
70 description: Value of the delay in the input path for SD UHS DDR50 timing
71 $ref: /schemas/types.yaml#/definitions/uint32
72 minimum: 0
73 maximum: 0x1f
74
75 cdns,phy-input-delay-mmc-highspeed:
76 description: Value of the delay in the input path for MMC high-speed timing
77 $ref: /schemas/types.yaml#/definitions/uint32
78 minimum: 0
79 maximum: 0x1f
80
81 cdns,phy-input-delay-mmc-ddr:
82 description: Value of the delay in the input path for eMMC high-speed DDR timing
83
84 # PHY DLL clock delays:
85 # Each delay property represents the fraction of the clock period.
86 # The approximate delay value will be
87 # (<delay property value>/128)*sdmclk_clock_period.
88 $ref: /schemas/types.yaml#/definitions/uint32
89 minimum: 0
90 maximum: 0x1f
91
92 cdns,phy-dll-delay-sdclk:
93 description: |
94 Value of the delay introduced on the sdclk output for all modes except
95 HS200, HS400 and HS400_ES.
96 $ref: /schemas/types.yaml#/definitions/uint32
97 minimum: 0
98 maximum: 0x7f
99
100 cdns,phy-dll-delay-sdclk-hsmmc:
101 description: |
102 Value of the delay introduced on the sdclk output for HS200, HS400 and
103 HS400_ES speed modes.
104 $ref: /schemas/types.yaml#/definitions/uint32
105 minimum: 0
106 maximum: 0x7f
107
108 cdns,phy-dll-delay-strobe:
109 description: |
110 Value of the delay introduced on the dat_strobe input used in
111 HS400 / HS400_ES speed modes.
112 $ref: /schemas/types.yaml#/definitions/uint32
113 minimum: 0
114 maximum: 0x7f
115
116 required:
117 - compatible
118 - reg
119 - interrupts
120 - clocks
121
122 allOf:
123 - $ref: mmc-controller.yaml
124 - if:
125 properties:
126 compatible:
127 contains:
128 const: amd,pensando-elba-sd4hc
129 then:
130 properties:
131 reg:
132 items:
133 - description: Host controller registers
134 - description: Elba byte-lane enable register for writes
135 required:
136 - resets
137 else:
138 properties:
139 reg:
140 maxItems: 1
141
142 unevaluatedProperties: false
143
144 examples:
145 - |
146 emmc: mmc@5a000000 {
147 compatible = "socionext,uniphier-sd4hc", "cdns,sd4hc";
148 reg = <0x5a000000 0x400>;
149 interrupts = <0 78 4>;
150 clocks = <&clk 4>;
151 bus-width = <8>;
152 mmc-ddr-1_8v;
153 mmc-hs200-1_8v;
154 mmc-hs400-1_8v;
155 cdns,phy-dll-delay-sdclk = <0>;
156 };
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