summaryrefslogtreecommitdiffstats
path: root/dts/Bindings/mmc/nvidia,tegra20-sdhci.yaml
blob: ce64b34983785a9217335220fc9408e46f997647 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mmc/nvidia,tegra20-sdhci.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NVIDIA Tegra Secure Digital Host Controller

maintainers:
  - Thierry Reding <thierry.reding@gmail.com>
  - Jon Hunter <jonathanh@nvidia.com>

description: |
  This controller on Tegra family SoCs provides an interface for MMC, SD, and
  SDIO types of memory cards.

  This file documents differences between the core properties described by
  mmc-controller.yaml and the properties for the Tegra SDHCI controller.

properties:
  compatible:
    oneOf:
      - enum:
          - nvidia,tegra20-sdhci
          - nvidia,tegra30-sdhci
          - nvidia,tegra114-sdhci
          - nvidia,tegra124-sdhci
          - nvidia,tegra210-sdhci
          - nvidia,tegra186-sdhci
          - nvidia,tegra194-sdhci

      - items:
          - const: nvidia,tegra132-sdhci
          - const: nvidia,tegra124-sdhci

      - items:
          - enum:
              - nvidia,tegra194-sdhci
              - nvidia,tegra234-sdhci
          - const: nvidia,tegra186-sdhci

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  assigned-clocks: true
  assigned-clock-parents: true
  assigned-clock-rates: true

  clocks:
    minItems: 1
    maxItems: 2

  clock-names:
    minItems: 1
    maxItems: 2

  resets:
    items:
      - description: module reset

  reset-names:
    items:
      - const: sdhci

  power-gpios:
    description: specify GPIOs for power control
    maxItems: 1

  interconnects:
    items:
      - description: memory read client
      - description: memory write client

  interconnect-names:
    items:
      - const: dma-mem # read
      - const: write

  iommus:
    maxItems: 1

  operating-points-v2:
    $ref: "/schemas/types.yaml#/definitions/phandle"

  power-domains:
    items:
      - description: phandle to the core power domain

  nvidia,default-tap:
    description: Specify the default inbound sampling clock trimmer value for
      non-tunable modes.

      The values are used for compensating trace length differences by
      adjusting the sampling point. The values are programmed to the Vendor
      Clock Control Register. Please refer to the reference manual of the SoC
      for correct values.

      The DQS trim values are only used on controllers which support HS400
      timing. Only SDMMC4 on Tegra210 and Tegra186 supports HS400.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,default-trim:
    description: Specify the default outbound clock trimmer value.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,dqs-trim:
    description: Specify DQS trim value for HS400 timing.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-down-offset-1v8:
    description: Specify drive strength calibration offsets for 1.8 V
      signaling modes.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-down-offset-1v8-timeout:
    description: Specify drive strength used as a fallback in case the
      automatic calibration times out on a 1.8 V signaling mode.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-down-offset-3v3:
    description: Specify drive strength calibration offsets for 3.3 V
      signaling modes.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-down-offset-3v3-timeout:
    description: Specify drive strength used as a fallback in case the
      automatic calibration times out on a 3.3 V signaling mode.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-down-offset-sdr104:
    description: Specify drive strength calibration offsets for SDR104 mode.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-down-offset-hs400:
    description: Specify drive strength calibration offsets for HS400 mode.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-up-offset-1v8:
    description: Specify drive strength calibration offsets for 1.8 V
      signaling modes.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-up-offset-1v8-timeout:
    description: Specify drive strength used as a fallback in case the
      automatic calibration times out on a 1.8 V signaling mode.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-up-offset-3v3:
    description: Specify drive strength calibration offsets for 3.3 V
      signaling modes.

      The property values are drive codes which are programmed into the
      PD_OFFSET and PU_OFFSET sections of the SDHCI_TEGRA_AUTO_CAL_CONFIG
      register. A higher value corresponds to higher drive strength. Please
      refer to the reference manual of the SoC for correct values. The SDR104
      and HS400 timing specific values are used in corresponding modes if
      specified.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-up-offset-3v3-timeout:
    description: Specify drive strength used as a fallback in case the
      automatic calibration times out on a 3.3 V signaling mode.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-up-offset-sdr104:
    description: Specify drive strength calibration offsets for SDR104 mode.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,pad-autocal-pull-up-offset-hs400:
    description: Specify drive strength calibration offsets for HS400 mode.
    $ref: "/schemas/types.yaml#/definitions/uint32"

  nvidia,only-1-8v:
    description: The presence of this property indicates that the controller
      operates at a 1.8 V fixed I/O voltage.
    $ref: "/schemas/types.yaml#/definitions/flag"

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - resets
  - reset-names

allOf:
  - $ref: "mmc-controller.yaml"
  - if:
      properties:
        compatible:
          contains:
            enum:
              - nvidia,tegra20-sdhci
              - nvidia,tegra30-sdhci
              - nvidia,tegra114-sdhci
              - nvidia,tegra124-sdhci
        clocks:
          items:
            - description: module clock
          minItems: 1
          maxItems: 1
    else:
      properties:
        clocks:
          items:
            - description: module clock
            - description: timeout clock
          minItems: 2
          maxItems: 2
        clock-names:
          items:
            - const: sdhci
            - const: tmclk
          minItems: 2
          maxItems: 2
      required:
        - clock-names

  - if:
      properties:
        compatible:
          contains:
            const: nvidia,tegra210-sdhci
    then:
      properties:
        pinctrl-names:
          oneOf:
            - items:
                - const: sdmmc-3v3
                  description: pad configuration for 3.3 V
                - const: sdmmc-1v8
                  description: pad configuration for 1.8 V
                - const: sdmmc-3v3-drv
                  description: pull-up/down configuration for 3.3 V
                - const: sdmmc-1v8-drv
                  description: pull-up/down configuration for 1.8 V
            - items:
                - const: sdmmc-3v3-drv
                  description: pull-up/down configuration for 3.3 V
                - const: sdmmc-1v8-drv
                  description: pull-up/down configuration for 1.8 V
            - items:
                - const: sdmmc-1v8-drv
                  description: pull-up/down configuration for 1.8 V
      required:
        - clock-names
  - if:
      properties:
        compatible:
          contains:
            enum:
              - nvidia,tegra186-sdhci
              - nvidia,tegra194-sdhci
    then:
      properties:
        pinctrl-names:
          items:
            - const: sdmmc-3v3
              description: pad configuration for 3.3 V
            - const: sdmmc-1v8
              description: pad configuration for 1.8 V
      required:
        - clock-names

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    mmc@c8000200 {
        compatible = "nvidia,tegra20-sdhci";
        reg = <0xc8000200 0x200>;
        interrupts = <47>;
        clocks = <&tegra_car 14>;
        resets = <&tegra_car 14>;
        reset-names = "sdhci";
        cd-gpios = <&gpio 69 0>; /* gpio PI5 */
        wp-gpios = <&gpio 57 0>; /* gpio PH1 */
        power-gpios = <&gpio 155 0>; /* gpio PT3 */
        bus-width = <8>;
    };

  - |
    #include <dt-bindings/clock/tegra210-car.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    mmc@700b0000 {
        compatible = "nvidia,tegra210-sdhci";
        reg = <0x700b0000 0x200>;
        interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
        clocks = <&tegra_car TEGRA210_CLK_SDMMC1>,
                 <&tegra_car TEGRA210_CLK_SDMMC_LEGACY>;
        clock-names = "sdhci", "tmclk";
        resets = <&tegra_car 14>;
        reset-names = "sdhci";
        pinctrl-names = "sdmmc-3v3", "sdmmc-1v8",
                        "sdmmc-3v3-drv", "sdmmc-1v8-drv";
        pinctrl-0 = <&sdmmc1_3v3>;
        pinctrl-1 = <&sdmmc1_1v8>;
        pinctrl-2 = <&sdmmc1_3v3_drv>;
        pinctrl-3 = <&sdmmc1_1v8_drv>;
        nvidia,pad-autocal-pull-up-offset-3v3 = <0x00>;
        nvidia,pad-autocal-pull-down-offset-3v3 = <0x7d>;
        nvidia,pad-autocal-pull-up-offset-1v8 = <0x7b>;
        nvidia,pad-autocal-pull-down-offset-1v8 = <0x7b>;
        nvidia,default-tap = <0x2>;
        nvidia,default-trim = <0x4>;
        assigned-clocks = <&tegra_car TEGRA210_CLK_SDMMC4>,
                          <&tegra_car TEGRA210_CLK_PLL_C4_OUT0>,
                          <&tegra_car TEGRA210_CLK_PLL_C4>;
        assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_C4_OUT0>;
        assigned-clock-rates = <200000000>, <1000000000>, <1000000000>;
    };