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From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Maximilian Luz <luzmaximilian@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-input@vger.kernel.org,
	platform-driver-x86@vger.kernel.org,
	Hans de Goede <hdegoede@redhat.com>,
	Chen Yu <yu.c.chen@intel.com>, Darren Hart <dvhart@infradead.org>,
	Andy Shevchenko <andy@infradead.org>,
	Benjamin Tissoires <benjamin.tissoires@redhat.com>
Subject: Re: [PATCH v2 2/2] input: soc_button_array for newer surface devices
Date: Tue, 16 Jul 2019 22:18:07 +0200	[thread overview]
Message-ID: <20190716201807.GA584@penguin> (raw)
In-Reply-To: <92e13b01-7353-1430-fb38-b5098d509da2@gmail.com>

On Tue, Jul 16, 2019 at 08:19:04PM +0200, Maximilian Luz wrote:
> 
> Hi,
> 
> On 7/16/19 9:21 AM, Dmitry Torokhov wrote:
> > When you are saying that Pro 4 and later models use different
> > notifications, does this mean that Pro 4 does not define any GPIOs?
> 
> Unfortunately, at least the Surface Book (first generation, buttons are
> handled the same way as on the Pro 4) has GPIOs defined in MSHW0040, but
> they are for different use. Specifically: They can detect if the
> clipboard (screen part of the device, the device basically has two parts
> that can be separated: clipboard and base) is being removed. Relying on
> the GPIOs was my first idea too, but that has been reported to shut down
> the Book 1 when the clipboard is detached.
> 
> As far as I know, the OEM platform revision check is the easiest way to
> differentiate between those devices.

OK, fair enough. By the way, I see you are adding some #ifdef
CONFIG_ACPI and stubbing out new functions, but the driver does not
really work without ACPI (acpi_match_device() will fail in this case I
would think and that will cause probe() to abort). So maybe we just add
depends on ACPI to the driver's Kconfig entry?

Thanks.

-- 
Dmitry

  reply	other threads:[~2019-07-17  7:41 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-02  0:37 [PATCH 0/2] Support for buttons on newer MS Surface devices Maximilian Luz
2019-07-02  0:37 ` [PATCH v2 1/2] platform: Fix device check for surfacepro3_button Maximilian Luz
2019-07-02  1:14   ` Yu Chen
2019-07-02  1:25     ` Maximilian Luz
2019-07-02  1:33       ` Maximilian Luz
2019-07-02  1:57         ` Yu Chen
2019-07-02  2:04           ` Maximilian Luz
2019-07-18 17:43   ` Andy Shevchenko
2019-07-02  0:37 ` [PATCH v2 2/2] input: soc_button_array for newer surface devices Maximilian Luz
2019-07-04 15:31   ` Maximilian Luz
2019-07-16  7:21   ` Dmitry Torokhov
2019-07-16 18:19     ` Maximilian Luz
2019-07-16 20:18       ` Dmitry Torokhov [this message]
2019-07-17 19:23         ` Maximilian Luz
2019-07-02 17:13 ` [PATCH 0/2] Support for buttons on newer MS Surface devices Andy Shevchenko
2019-07-02 17:26   ` Maximilian Luz
2019-07-20 15:15 ` Maximilian Luz

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