On Wed, Jun 05, 2024 at 06:12:44PM -0500, Danny Kaehn wrote: > This is a USB HID device which includes an I2C controller and 8 GPIO pins. > > The binding allows describing the chip's gpio and i2c controller in DT > using the subnodes named "gpio" and "i2c", respectively. This is There's no more gpio subnode. > intended to be used in configurations where the CP2112 is permanently > connected in hardware. > > Signed-off-by: Danny Kaehn <danny.kaehn@xxxxxxxxxx> > --- > .../devicetree/bindings/i2c/silabs,cp2112.yaml | 105 +++++++++++++++++++++ > 1 file changed, 105 insertions(+) > > diff --git a/Documentation/devicetree/bindings/i2c/silabs,cp2112.yaml b/Documentation/devicetree/bindings/i2c/silabs,cp2112.yaml > new file mode 100644 > index 000000000000..0108f2e43c8c > --- /dev/null > +++ b/Documentation/devicetree/bindings/i2c/silabs,cp2112.yaml > @@ -0,0 +1,105 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/i2c/silabs,cp2112.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: CP2112 HID USB to SMBus/I2C Bridge > + > +maintainers: > + - Danny Kaehn <danny.kaehn@xxxxxxxxxx> > + > +description: > + The CP2112 is a USB HID device which includes an integrated I2C controller > + and 8 GPIO pins. Its GPIO pins can each be configured as inputs, open-drain > + outputs, or push-pull outputs. > + > +properties: > + compatible: > + const: usb10c4,ea90 > + > + reg: > + maxItems: 1 > + description: The USB port number on the host controller Or hub ports. Just drop 'on the host controller'. > + > + i2c: > + description: The SMBus/I2C controller node for the CP2112 > + $ref: /schemas/i2c/i2c-controller.yaml# > + unevaluatedProperties: false > + > + properties: > + sda-gpios: > + maxItems: 1 > + > + scl-gpios: > + maxItems: 1 These are because I2C can be on any of the pins? It's a bit odd if they aren't used as gpios. Probably should be pinmux, but that's overkill for 2 pins. > + > + clock-frequency: > + minimum: 10000 > + default: 100000 > + maximum: 400000 > + > + interrupt-controller: true > + "#interrupt-cells": > + const: 2 Where does the > + > + gpio-controller: true > + "#gpio-cells": > + const: 2 > + > + gpio-line-names: > + minItems: 1 > + maxItems: 8 > + > +patternProperties: > + "-hog(-[0-9]+)?$": > + type: object > + > + required: > + - gpio-hog > + > +required: > + - compatible > + - reg > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/irq.h> > + #include <dt-bindings/gpio/gpio.h> > + > + usb { > + #address-cells = <1>; > + #size-cells = <0>; > + > + cp2112: device@1 { > + compatible = "usb10c4,ea90"; > + reg = <1>; > + > + i2c { > + #address-cells = <1>; > + #size-cells = <0>; > + sda-gpios = <&cp2112 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; > + scl-gpios = <&cp2112 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; > + > + temp@48 { > + compatible = "national,lm75"; > + reg = <0x48>; > + }; > + }; > + > + gpio-controller; > + interrupt-controller; > + #gpio-cells = <2>; > + gpio-line-names = "CP2112_SDA", "CP2112_SCL", "TEST2", > + "TEST3","TEST4", "TEST5", "TEST6"; > + > + fan-rst-hog { > + gpio-hog; > + gpios = <7 GPIO_ACTIVE_HIGH>; > + output-high; > + line-name = "FAN_RST"; > + }; > + }; > + }; > > -- > 2.25.1 >
