65 lines
1.6 KiB
YAML
65 lines
1.6 KiB
YAML
|
# SPDX-License-Identifier: GPL-2.0
|
||
|
|
%YAML 1.2
|
||
|
|
---
|
||
|
|
$id: http://devicetree.org/schemas/mmc/mmc-pwrseq-simple.yaml#
|
||
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
||
|
|
|
||
|
|
title: Simple MMC power sequence provider binding
|
||
|
|
|
||
|
|
maintainers:
|
||
|
|
- Ulf Hansson <ulf.hansson@linaro.org>
|
||
|
|
|
||
|
|
description:
|
||
|
|
The purpose of the simple MMC power sequence provider is to supports a set
|
||
|
|
of common properties between various SOC designs. It thus enables us to use
|
||
|
|
the same provider for several SOC designs.
|
||
|
|
|
||
|
|
properties:
|
||
|
|
compatible:
|
||
|
|
const: mmc-pwrseq-simple
|
||
|
|
|
||
|
|
reset-gpios:
|
||
|
|
minItems: 1
|
||
|
|
# Put some limit to avoid false warnings
|
||
|
|
maxItems: 32
|
||
|
|
description:
|
||
|
|
contains a list of GPIO specifiers. The reset GPIOs are asserted
|
||
|
|
at initialization and prior we start the power up procedure of the card.
|
||
|
|
They will be de-asserted right after the power has been provided to the
|
||
|
|
card.
|
||
|
|
|
||
|
|
clocks:
|
||
|
|
minItems: 1
|
||
|
|
description: Handle for the entry in clock-names.
|
||
|
|
|
||
|
|
clock-names:
|
||
|
|
items:
|
||
|
|
- const: ext_clock
|
||
|
|
description: External clock provided to the card.
|
||
|
|
|
||
|
|
post-power-on-delay-ms:
|
||
|
|
description:
|
||
|
|
Delay in ms after powering the card and de-asserting the
|
||
|
|
reset-gpios (if any).
|
||
|
|
|
||
|
|
power-off-delay-us:
|
||
|
|
description:
|
||
|
|
Delay in us after asserting the reset-gpios (if any)
|
||
|
|
during power off of the card.
|
||
|
|
|
||
|
|
required:
|
||
|
|
- compatible
|
||
|
|
|
||
|
|
additionalProperties: false
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
#include <dt-bindings/gpio/gpio.h>
|
||
|
|
sdhci0_pwrseq {
|
||
|
|
compatible = "mmc-pwrseq-simple";
|
||
|
|
reset-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
|
||
|
|
clocks = <&clk_32768_ck>;
|
||
|
|
clock-names = "ext_clock";
|
||
|
|
};
|
||
|
|
...
|