linux-kernel - Re: [PATCH 1/7] drivers:input:tsc2007: add new common binding names, pre-calibration, flipping and rotation

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Date:	Mon, 9 Nov 2015 11:33:27 -0600
From:	Rob Herring <robh@...nel.org>
To:	"H. Nikolaus Schaller" <hns@...delico.com>
Cc:	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Benoît Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, gta04-owner@...delico.com
Subject: Re: [PATCH 1/7] drivers:input:tsc2007: add new common binding names,
 pre-calibration, flipping and rotation

On Fri, Nov 06, 2015 at 04:14:43PM +0100, H. Nikolaus Schaller wrote:
> commit b98abe52fa8e ("Input: add common DT binding for touchscreens")
> introduced common DT bindings for touchscreens [1] and a helper function to
> parse the DT.
> 
> This has been integrated and interpretation of the inversion (flipping)
> properties for the x and y axis has been added to accommodate any
> orientation of the touch in relation to the LCD.
> 
> By scaling the min/max ADC values to the screen size it is now possible to
> pre-calibrate the touch so that is (almost) exactly matches the LCD it is
> glued onto. This allows to well enough operate the touch before a user
> space calibration can improve the precision.
> 
> calculate_pressure has been renamed to calculate_resistance because
> that is what it is doing.
> 
> [1]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
> 
> Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
> ---
>  .../bindings/input/touchscreen/tsc2007.txt         |  20 +--
>  drivers/input/touchscreen/tsc2007.c                | 135 +++++++++++++++++----
>  include/linux/i2c/tsc2007.h                        |   8 ++
>  3 files changed, 135 insertions(+), 28 deletions(-)

This one has similar problems with breaking backwards compatibility.

Rob
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