On Thu, Feb 24, 2022 at 04:59:33PM -0800, Dmitry Antipov wrote: > From: Dmitry Antipov <dmanti@xxxxxxxxxxxxx> Please follow the conventions of the subsystem for the subject: dt-bindings: input: ... > > Documentation describes the required and optional properties for > implementing Device Tree for a Microsoft G6 Touch Digitizer that > supports HID over SPI Protocol 1.0 specification. > > Signed-off-by: Dmitry Antipov <dmanti@xxxxxxxxxxxxx> > --- > .../input/microsoft,g6-touch-digitizer.yaml | 105 ++++++++++++++++++ > 1 file changed, 105 insertions(+) > create mode 100644 Documentation/devicetree/bindings/input/microsoft,g6-touch-digitizer.yaml > > diff --git a/Documentation/devicetree/bindings/input/microsoft,g6-touch-digitizer.yaml b/Documentation/devicetree/bindings/input/microsoft,g6-touch-digitizer.yaml > new file mode 100644 > index 000000000000..e516717527e9 > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/microsoft,g6-touch-digitizer.yaml > @@ -0,0 +1,105 @@ > +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/input/microsoft,g6-touch-digitizer.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Microsoft G6 Touch Digitizer > + > +maintainers: > + - Dmitry Antipov <dmanti@xxxxxxxxxxxxx> > + > +description: | > + Microsoft G6 touch digitizer is a HID over SPI device supporting HID Over SPI > + Protocol Specification 1.0, available at > + https://www.microsoft.com/en-us/download/details.aspx?id=103325. > + > +properties: > + compatible: > + oneOf: > + - const: microsoft,g6-touch-digitizer > + - items: > + - const: microsoft,g6-touch-digitizer > + - const: hid-over-spi Why are both cases needed? Assuming you keep the 2nd case, you will need a custom 'select' to avoid applying this schema to another binding using 'hid-over-spi': select: properties: compatible: contains: const: microsoft,g6-touch-digitizer required: - compatible > + > + reg: > + maxItems: 1 > + > + interrupts: > + maxItems: 1 > + > + reset-gpios: > + maxItems: 1 > + description: > + GPIO specifier for the digitizer's reset pin (active low). The line must > + be flagged with GPIO_ACTIVE_LOW. > + > + vdd-supply: > + description: > + Regulator for the VDD supply voltage. > + > + input-report-header-address: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: > + This property and the rest are described in HID Over SPI Protocol Spec 1.0 Each property needs a description and a more specific spec location. No constraints on the values? 0 - 2^32 is valid? > + > + input-report-body-address: > + $ref: /schemas/types.yaml#/definitions/uint32 > + > + output-report-address: > + $ref: /schemas/types.yaml#/definitions/uint32 > + > + read-opcode: > + $ref: /schemas/types.yaml#/definitions/uint32 > + > + write-opcode: > + $ref: /schemas/types.yaml#/definitions/uint32 > + > + hid-over-spi-flags: > + $ref: /schemas/types.yaml#/definitions/uint32 > + > + post-power-on-delay-ms: > + description: > + Optional time in ms required by the device after enabling its regulators > + or powering it on, before it is ready for communication. > + > + minimal-reset-delay-ms: > + description: > + Optional minimum amount of time in ms that device needs to be in reset > + state for the reset to take effect. These should be implied by the compatible string. > + > +required: > + - compatible > + - interrupts > + - reset-gpios It's not allowed to have reset under h/w control? > + - vdd-supply > + - input-report-header-address > + - input-report-body-address > + - output-report-address > + - read-opcode > + - write-opcode > + - hid-over-spi-flags > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/irq.h> > + #include <dt-bindings/gpio/gpio.h> > + spi-hid-dev0 { hid@0 And you'll need to define a spi bus. > + compatible = "microsoft,g6-touch-digitizer", "hid-over-spi"; > + reg = <0>; > + interrupts-extended = <&gpio 42 IRQ_TYPE_EDGE_FALLING>; > + reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>; > + vdd-supply = <&pm8350c_l3>; > + pinctrl-names = "default"; > + pinctrl-0 = <&ts_d6_reset_assert &ts_d6_int_bias>; > + input-report-header-address = <0x1000>; > + input-report-body-address = <0x1004>; > + output-report-address = <0x2000>; > + read-opcode = <0x0b>; > + write-opcode = <0x02>; > + hid-over-spi-flags = <0x00>; > + post-power-on-delay-ms = <5>; > + minimal-reset-delay-ms = <5>; > + }; > -- > 2.25.1 > >
