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