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There are some x86 tablets / 2-in-1s which ship with Android as their factory OS image. These have pretty broken ACPI tables, relying on everything being hardcoded in the factory kernel image. platform/x86/x86-android-tablets.c manually instantiates i2c-clients for i2c devices on these tablets to make them work with the mainline kernel. The Lenovo Yoga Book 1 (yb1-x90f/l) is such a 2-in-1. It has 2 I2C-HID devices its main touchscreen and a Wacom digitizer. Its main touchscreen can alternatively also be used in HiDeep's native protocol mode but for the Wacom digitizer we really need I2C-HID. This patch allows using i2c-hid-of on non OF platforms so that it can bind to a non ACPI instantiated i2c_client on x86 for the Wacom digitizer. Note the driver already has an "i2c-over-hid" i2c_device_id (rather then an of_device_id). Besides enabling building on non-OF platforms this also replaces the only of_property_read_u32() call with device_property_read_u32() note that other properties where already read using device_property_read_...(). Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Link: https://lore.kernel.org/r/20230413093625.71146-3-hdegoede@redhat.com Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
74 lines
2.2 KiB
Text
74 lines
2.2 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig I2C_HID
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tristate "I2C HID support"
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default y
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depends on I2C && INPUT && HID
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if I2C_HID
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config I2C_HID_ACPI
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tristate "HID over I2C transport layer ACPI driver"
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depends on ACPI
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select I2C_HID_CORE
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help
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Say Y here if you use a keyboard, a touchpad, a touchscreen, or any
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other HID based devices which is connected to your computer via I2C.
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This driver supports ACPI-based systems.
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If unsure, say N.
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This support is also available as a module. If so, the module
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will be called i2c-hid-acpi. It will also build/depend on the
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module i2c-hid.
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config I2C_HID_OF
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tristate "HID over I2C transport layer Open Firmware driver"
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# No "depends on OF" because this can also be used for manually
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# (board-file) instantiated "hid-over-i2c" type i2c-clients.
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select I2C_HID_CORE
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help
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Say Y here if you use a keyboard, a touchpad, a touchscreen, or any
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other HID based devices which is connected to your computer via I2C.
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This driver supports Open Firmware (Device Tree)-based systems as
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well as binding to manually (board-file) instantiated i2c-hid-clients.
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If unsure, say N.
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This support is also available as a module. If so, the module
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will be called i2c-hid-of. It will also build/depend on the
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module i2c-hid.
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config I2C_HID_OF_ELAN
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tristate "Driver for Elan hid-i2c based devices on OF systems"
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depends on OF
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select I2C_HID_CORE
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help
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Say Y here if you want support for Elan i2c devices that use
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the i2c-hid protocol on Open Firmware (Device Tree)-based
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systems.
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If unsure, say N.
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This support is also available as a module. If so, the module
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will be called i2c-hid-of-elan. It will also build/depend on
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the module i2c-hid.
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config I2C_HID_OF_GOODIX
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tristate "Driver for Goodix hid-i2c based devices on OF systems"
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depends on OF
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select I2C_HID_CORE
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help
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Say Y here if you want support for Goodix i2c devices that use
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the i2c-hid protocol on Open Firmware (Device Tree)-based
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systems.
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If unsure, say N.
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This support is also available as a module. If so, the module
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will be called i2c-hid-of-goodix. It will also build/depend on
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the module i2c-hid.
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config I2C_HID_CORE
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tristate
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endif
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