On Tue, Jul 13, 2021 at 4:51 AM Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote: > > gpio-virtio represents a virtio GPIO controller and this patch adds > binding for the same. The gpio-virtio subnode can be part of a > virtio,mmio node and is based on its binding. > > Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx> > --- > Depends on: > > https://lore.kernel.org/lkml/7c716c2eb7ace5b5a560d8502af93101dbb53d24.1626170146.git.viresh.kumar@xxxxxxxxxx/ > --- > .../devicetree/bindings/gpio/gpio-virtio.yaml | 67 +++++++++++++++++++ > 1 file changed, 67 insertions(+) > create mode 100644 Documentation/devicetree/bindings/gpio/gpio-virtio.yaml > > diff --git a/Documentation/devicetree/bindings/gpio/gpio-virtio.yaml b/Documentation/devicetree/bindings/gpio/gpio-virtio.yaml > new file mode 100644 > index 000000000000..c813cdfd60fd > --- /dev/null > +++ b/Documentation/devicetree/bindings/gpio/gpio-virtio.yaml > @@ -0,0 +1,67 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/gpio/gpio-virtio.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Virtio memory mapped GPIO controller > + > +maintainers: > + - Viresh Kumar <viresh.kumar@xxxxxxxxxx> > + > +description: > + Virtio GPIO controller, see /schemas/virtio/mmio.yaml for more details. > + > +allOf: > + - $ref: /schemas/gpio/gpio.yaml# > + > +properties: > + $nodename: > + pattern: '^gpio-virtio@[0-9]+$' > + > + reg: > + description: > + The cell is the device ID of the GPIO device (VIRTIO_ID_GPIO) as per > + dt-bindings/virtio/virtio_ids.h. > + const: 41 > + $ref: /schemas/virtio/mmio.yaml#/properties/reg > + > + gpio-controller: true > + > + "#gpio-cells": > + const: 2 > + > + interrupt-controller: true > + > + "#interrupt-cells": > + const: 2 > + > +required: > + - reg > + - gpio-controller > + - "#gpio-cells" > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/virtio/virtio_ids.h> > + > + virtio@3000 { > + compatible = "virtio,mmio"; > + reg = <0x3000 0x100>; > + interrupts = <41>; > + > + #address-cells = <1>; > + #size-cells = <0>; > + > + gpio-virtio@0 { > + reg = <VIRTIO_ID_GPIO>; > + gpio-controller; > + #gpio-cells = <2>; > + interrupt-controller; > + #interrupt-cells = <2>; Similar to I2C, all this can just be added to the parent node. Rob
