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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /Documentation/devicetree/bindings/gpio/gpio-delay.yaml | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/gpio-delay.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-delay.yaml | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-delay.yaml b/Documentation/devicetree/bindings/gpio/gpio-delay.yaml new file mode 100644 index 0000000000..1cebc4058e --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-delay.yaml @@ -0,0 +1,79 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/gpio/gpio-delay.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: GPIO delay controller + +maintainers: + - Alexander Stein <linux@ew.tq-group.com> + +description: | + This binding describes an electrical setup where setting an GPIO output + is delayed by some external setup, e.g. RC circuit. + + +----------+ +-----------+ + | | VCC_B | | + | | | | | + | | VCC_A _ | | + | GPIO | | | R | Consumer | + |controller| ___ |_| | | + | | | | | | | + | [IOx|-------| |--+-----|-----+ | + | | |___| | | input | + | | | | | + +----------+ --- C +-----------+ + --- + | + - + GND + + If the input on the consumer is controlled by an open-drain signal + attached to an RC circuit the ramp-up delay is not under control + of the GPIO controller. + +properties: + compatible: + const: gpio-delay + + "#gpio-cells": + description: | + Specifies the pin, ramp-up and ramp-down delays. The + delays are specified in microseconds. + const: 3 + + gpios: + description: Array of GPIOs which output signal change is delayed + minItems: 1 + maxItems: 32 + + gpio-controller: true + + gpio-line-names: + minItems: 1 + maxItems: 32 + +required: + - compatible + - "#gpio-cells" + - gpio-controller + - gpios + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + + enable_delay: enable-delay { + compatible = "gpio-delay"; + #gpio-cells = <3>; + gpio-controller; + gpios = <&gpio0 3 GPIO_ACTIVE_LOW>, + <&gpio3 1 GPIO_ACTIVE_HIGH>; + }; + + consumer { + enable-gpios = <&enable_delay 0 130000 30000>; + }; |