Hi,
Previously I sent a patch that enables GPIO interrupts for i2c-hid. This
was not accepted by the community:
https://lkml.org/lkml/2015/1/26/398
However, it turned out that there are actually device(s) out there that
need this support. One of them is Lenovo Thinkpad 10. It has touch screen
connected to IO-APIC but in addition it includes Wacom digitizer
that uses GPIO as an interrupt.
In this version of the patch, I limited the GPIO retrieving code path to be
taken only when the device is enumerated from ACPI. This allows DT to use
whatever is the appropriate mechanism to represent GPIO/interrupt
configuration and still makes current ACPI based devices to work.
The first two patches are needed to get the Wacom digitizer work properly
with i2c-hid.
Mika Westerberg (3):
HID: wacom: Add support for I2C connected devices
HID: i2c-hid: Read wMaxInputLength of input report instead of bufsize
HID: i2c-hid: Add support for ACPI GPIO interrupts
drivers/hid/i2c-hid/i2c-hid.c | 76 +++++++++++++++++++++++++++++++++----------
drivers/hid/wacom_wac.c | 5 +++
2 files changed, 63 insertions(+), 18 deletions(-)
--
2.1.4
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