linux-kernel - [PATCH 0/3] HID: Support for Lenovo Thinkpad 10 digitizer

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Message-Id: <1424699565-138045-1-git-send-email-mika.westerberg@linux.intel.com>
Date:	Mon, 23 Feb 2015 15:52:42 +0200
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Mark Rutland <mark.rutland@....com>, sb@...abs.hk,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] HID: Support for Lenovo Thinkpad 10 digitizer

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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