This patchset allows USB-HID devices to have DeviceTree bindings through sharing
the USB fwnode with the HID driver, and adds such a binding and driver
implementation for the CP2112 USB to SMBus Bridge (which necessitated the
USB-HID change). This change allows a CP2112 permanently attached in hardware to
be described in DT and ACPI and interoperate with other drivers.
Changes in v9:
- Add _ADR-based ACPI binding of child nodes (I2C is _ADR Zero, GPIO is _ADR One)
- Use a loop-based approach for assigning child nodes within probe().
As a consequence, hid-cp2112.c no longer maintains references to the
child fwnodes during the lifetime of the device. (plese correct if this
is actually needed for this use-case)
Changes in v8:
- Apply Review tags retroactively to patches previously reviewed
Changes in v7:
- Use dev_fwnode when calling fwnod_handle_put in i2c_adapter in hid-cp2112.c
- Capitalize I2C and GPIO in commit message for patch 0003
Changes in v6:
- Fix fwnode_handle reference leaks in hid-cp21112.c
- Simplify hog node pattern in silabs,cp2112.yaml
Changes in v5:
- Use fwnode API instead of of_node api in hid-core.c and hid-cp2112.c
- Include sda-gpios and scl-gpios in silabs,cp2112.yaml
- Additional fixups to silabs,cp2112.yaml to address comments
- Submit threaded interrupt bugfix separately from this patchset, as requested
Changes in v4:
- Moved silabs,cp2112.yaml to /Documentation/devicetree/bindings/i2c
Changes in v3:
- Additional fixups to silabs,cp2112.yaml to address comments
Changes in v2:
- Added more detail to silabs,cp2112.yaml dt-binding
- Moved silabs,cp2112.yaml to /Documentation/devicetree/bindings/input
- Added support for setting smbus clock-frequency from DT in hid-cp2112.c
- Added freeing of of_nodes on error paths of _probe in hid-cp2112.c
Danny Kaehn (3):
dt-bindings: i2c: Add CP2112 HID USB to SMBus Bridge
HID: usbhid: Share USB device firmware node with child HID device
HID: cp2112: Fwnode Support
.../bindings/i2c/silabs,cp2112.yaml | 113 ++++++++++++++++++
drivers/hid/hid-cp2112.c | 18 +++
drivers/hid/usbhid/hid-core.c | 2 +
3 files changed, 133 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/silabs,cp2112.yaml
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2.25.1
