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Date:   Thu, 30 Aug 2018 14:56:17 -0700
From:   Harry Cutts <>
To:     linux-input <>,
        LKML <>
Cc:     Jiri Kosina <>,
        Dmitry Torokhov <>,
        Benjamin Tissoires <>,
        Harry Cutts <>,,
        Jonathan Corbet <>,
        Jiri Kosina <>
Subject: [PATCH v2 0/5] Add support for high-resolution scrolling on Logitech mice

Hi everyone,

This is v2 of the patch set adding support for high-resolution scroll
wheels on Logitech mice. See the linux-input "Reporting high-resolution
scroll events" thread [0] for previous discussion of the evdev changes.
I would love to hear your feedback.


Harry Cutts
Chrome OS Touch/Input team


Changes in v2:
* Changed the REL_WHEEL_HI_RES code to use micrometres (a.k.a. microns)
  as its units, instead of 256ths of a millimetre.
* Removed support for mice connecting over Bluetooth, due to a bug where
  the mouse's high-res mode and the driver's settings get out of sync
  when the mouse is power cycled.
* Moved the creation of the HID++ 1.0 function and the refactor to use
  the LDJ_DEVICE macro into separate patches.
* Added a couple of explanatory comments to the Logitech driver.

Harry Cutts (5):
  Add the `REL_WHEEL_HI_RES` event code
  Create a utility class for counting scroll events
  Add function to enable HID++ 1.0 "scrolling acceleration"
  Enable high-resolution scrolling on Logitech mice
  Use LDJ_DEVICE macro for existing Logitech mice

 Documentation/input/event-codes.rst    |  11 +-
 drivers/hid/hid-input.c                |  45 ++++
 drivers/hid/hid-logitech-hidpp.c       | 311 ++++++++++++++++++++++---
 include/linux/hid.h                    |  28 +++
 include/uapi/linux/input-event-codes.h |   1 +
 5 files changed, 368 insertions(+), 28 deletions(-)


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