1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/mmc/mmc-spi-slot.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: MMC/SD/SDIO slot directly connected to a SPI bus
8
9 maintainers:
10 - Ulf Hansson <ulf.hansson@linaro.org>
11
12 allOf:
13 - $ref: mmc-controller.yaml
14 - $ref: /schemas/spi/spi-peripheral-props.yaml
15
16 description: |
17 The extra properties used by an mmc connected via SPI.
18
19 properties:
20 compatible:
21 const: mmc-spi-slot
22
23 reg:
24 maxItems: 1
25
26 interrupts:
27 maxItems: 1
28
29 voltage-ranges:
30 $ref: /schemas/types.yaml#/definitions/uint32-matrix
31 description: |
32 Two cells are required, first cell specifies minimum slot voltage (mV),
33 second cell specifies maximum slot voltage (mV).
34 items:
35 items:
36 - description: |
37 value for minimum slot voltage in mV
38 default: 3200
39 - description: |
40 value for maximum slot voltage in mV
41 default: 3400
42 maxItems: 1
43
44 gpios:
45 description: |
46 For historical reasons, this does not follow the generic mmc-controller
47 binding.
48 minItems: 1
49 items:
50 - description: Card-Detect GPIO
51 - description: Write-Protect GPIO
52
53 required:
54 - compatible
55 - reg
56 - spi-max-frequency
57
58 unevaluatedProperties: false
59
60 examples:
61 - |
62 #include <dt-bindings/gpio/gpio.h>
63 spi {
64 #address-cells = <1>;
65 #size-cells = <0>;
66 mmc@0 {
67 compatible = "mmc-spi-slot";
68 reg = <0>;
69 gpios = <&gpio 14 GPIO_ACTIVE_LOW>, <&gpio 15 GPIO_ACTIVE_HIGH>;
70 voltage-ranges = <3300 3300>;
71 spi-max-frequency = <50000000>;
72 interrupts = <42>;
73 interrupt-parent = <&PIC>;
74 };
75 };
76
77 ...
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