linux-kernel - [PATCH 0/4] Topstar ACPI LED Workaround

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Date:   Tue, 17 Oct 2017 18:17:26 +0200
From:   Guillaume Douézan-Grard <gdouezangrard@...il.com>
To:     Darren Hart <dvhart@...radead.org>
Cc:     Andy Shevchenko <andy@...radead.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/4] Topstar ACPI LED Workaround

Hi Darren,

On Topstar U931 Notebooks, an issue prevents the WLAN toggle key from
being properly managed by the Embedded Controller and successfully
disconnect the adapter. A specific ACPI method allows to toggle the WLAN
LED state regardless.

These are barebone laptops, sold under quite a lot of brands and
configurations, with different firmwares and so on. I can only say for sure
that this issue is present for all the models sold under a specific brand,
that's why I'm reluctant to enable this by default with a DMI check.

Thus, the new `led_workaround` option registers this LED with the
corresponding subsystem, making possible to use a software-based trigger
(rfkill for instance to synchronize the LED with the softkill state).

Thank you for your time,

--
Guillaume Douézan-Grard

Guillaume Douézan-Grard (4):
  platform/x86: topstar-laptop: non-functional changes
  platform/x86: topstar-laptop: change to generic module
  platform/x86: topstar-laptop: add platform device
  platform/x86: topstar-laptop: add optional WLAN LED workaround

 drivers/platform/x86/Kconfig          |   2 +
 drivers/platform/x86/topstar-laptop.c | 339 ++++++++++++++++++++++++++--------
 2 files changed, 267 insertions(+), 74 deletions(-)

-- 
2.14.1