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    Subject[PATCH v3 1/2] dt-bindings: i2c: add binding for i2c-hotplug-gpio
    Date
    Document device tree schema which describes hot-pluggable via GPIO
    i2c bus.

    Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
    ---
    .../bindings/i2c/i2c-hotplug-gpio.yaml | 65 +++++++++++++++++++
    1 file changed, 65 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/i2c/i2c-hotplug-gpio.yaml

    diff --git a/Documentation/devicetree/bindings/i2c/i2c-hotplug-gpio.yaml b/Documentation/devicetree/bindings/i2c/i2c-hotplug-gpio.yaml
    new file mode 100644
    index 000000000000..21f2b74ca6c1
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/i2c/i2c-hotplug-gpio.yaml
    @@ -0,0 +1,65 @@
    +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    +%YAML 1.2
    +---
    +$id: http://devicetree.org/schemas/i2c/i2c-hotplug-gpio.yaml#
    +$schema: http://devicetree.org/meta-schemas/core.yaml#
    +
    +title: GPIO detected hot-plugged I2C bus
    +
    +maintainers:
    + - Michał Mirosław <mirq-linux@rere.qmqm.pl>
    +
    +description:
    + Driver for hot-plugged I2C busses, where some devices on a bus
    + are hot-pluggable and their presence is indicated by GPIO line.
    +
    +properties:
    + compatible:
    + items:
    + - const: i2c-hotplug-gpio
    +
    + '#address-cells':
    + const: 1
    +
    + '#size-cells':
    + const: 0
    +
    + interrupts-extended:
    + minItems: 1
    +
    + detect-gpios:
    + maxItems: 1
    +
    + i2c-parent:
    + maxItems: 1
    +
    +required:
    + - compatible
    + - '#address-cells'
    + - '#size-cells'
    + - interrupts-extended
    + - detect-gpios
    + - i2c-parent
    +
    +unevaluatedProperties: false
    +
    +examples:
    + - |
    + /*
    + * Asus Transformers use I2C hotplug for attachable dock keyboard
    + */
    + #include <dt-bindings/gpio/gpio.h>
    + #include <dt-bindings/interrupt-controller/irq.h>
    +
    + i2c-dock {
    + compatible = "i2c-hotplug-gpio";
    +
    + #address-cells = <1>;
    + #size-cells = <0>;
    +
    + interrupts-extended = <&gpio 164 IRQ_TYPE_EDGE_BOTH>;
    + detect-gpios = <&gpio 164 GPIO_ACTIVE_LOW>;
    +
    + i2c-parent = <&gen2_i2c>;
    + };
    +...
    --
    2.39.2
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