1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/mmc/mmc-pwrseq-simple.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Simple MMC power sequence provider binding
8
9maintainers:
10  - Ulf Hansson <ulf.hansson@linaro.org>
11
12description:
13  The purpose of the simple MMC power sequence provider is to supports a set
14  of common properties between various SOC designs. It thus enables us to use
15  the same provider for several SOC designs.
16
17properties:
18  compatible:
19    const: mmc-pwrseq-simple
20
21  reset-gpios:
22    minItems: 1
23    description:
24      contains a list of GPIO specifiers. The reset GPIOs are asserted
25      at initialization and prior we start the power up procedure of the card.
26      They will be de-asserted right after the power has been provided to the
27      card.
28
29  clocks:
30    minItems: 1
31    description: Handle for the entry in clock-names.
32
33  clock-names:
34    items:
35      - const: ext_clock
36    description: External clock provided to the card.
37
38  post-power-on-delay-ms:
39    description:
40      Delay in ms after powering the card and de-asserting the
41      reset-gpios (if any).
42    $ref: /schemas/types.yaml#/definitions/uint32
43
44  power-off-delay-us:
45    description:
46      Delay in us after asserting the reset-gpios (if any)
47      during power off of the card.
48    $ref: /schemas/types.yaml#/definitions/uint32
49
50required:
51  - compatible
52
53examples:
54  - |
55    #include <dt-bindings/gpio/gpio.h>
56    sdhci0_pwrseq {
57      compatible = "mmc-pwrseq-simple";
58      reset-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
59      clocks = <&clk_32768_ck>;
60      clock-names = "ext_clock";
61    };
62...
63