From: Tony Lindgren <tony@atomide.com>
To: Sebastian Reichel <sre@debian.org>
Cc: Sebastian Reichel <sre@ring0.de>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Dmitry Torokhov <dtor@mail.ru>,
linux-input@vger.kernel.org,
Rob Herring <rob.herring@calxeda.com>,
Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Stephen Warren <swarren@wwwdotorg.org>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Rob Landley <rob@landley.net>,
Grant Likely <grant.likely@linaro.org>,
devicetree@vger.kernel.org, linux-omap@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] Documentation: dt: Document TSC2005 DT binding
Date: Mon, 9 Dec 2013 09:46:38 -0800 [thread overview]
Message-ID: <20131209174638.GC12527@atomide.com> (raw)
In-Reply-To: <1386284979-9680-3-git-send-email-sre@debian.org>
* Sebastian Reichel <sre@debian.org> [131205 15:11]:
> Add devicetree binding documentation for TSC2005 touchscreen.
>
> Signed-off-by: Sebastian Reichel <sre@debian.org>
> ---
> .../bindings/input/touchscreen/tsc2005.txt | 49 ++++++++++++++++++++++
> 1 file changed, 49 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
>
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> new file mode 100644
> index 0000000..4e7df0b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> @@ -0,0 +1,49 @@
> +* TSC2005 Touchscreen
> +
> +Required properties:
> + - compatible : "ti,tsc2005"
> + - reg : SPI device address
> + - spi-max-frequency : Maximal SPI speed
> + - interrupts : IRQ specifier
> + - reset-gpio : GPIO specifier
> +
> +Optional properties:
> + - ti,fuzz-x : integer, X noise value of the touchscreen
> + (defaults to 4)
> + - ti,fuzz-y : integer, Y noise value of the touchscreen
> + (defaults to 8)
> + - ti,fuzz-pressure : integer, pressure noise value of the touchscreen
> + (defaults to 2)
> + - ti,max-x : integer, maximum reported x value
> + (defaults to 4096)
> + - ti,max-y : integer, maximum reported y value
> + (defaults to 4096)
> + - ti,max-pressure : integer, maximum reported pressure
> + (defaults to 4096)
> + - ti,x-plate-resistance : integer, resistance of the touchscreen's X plates
> + in ohm (defaults to 280)
> + - ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
> + the configured time (in milli seconds), the driver
> + will reset it. This is disabled by default.
Instead of adding these optional ti,* properties you can set them in the
driver directly in the of_match table based on the compatible flag. Then
you can pass compatible flag like ti,tsc2005-nokia-n900, or the name of
the LCD panel. Most likely these depend on the LCD panel selected.
Regards,
Tony
> +Example:
> +
> +&mcspi1 {
> + tsc2005@0 {
> + compatible = "ti,tsc2005";
> + spi-max-frequency = <6000000>;
> + reg = <0>;
> + reset-gpio = <&gpio4 8 GPIO_ACTIVE_HIGH>; /* 104 */
> + interrupt-parent = <&gpio4>;
> + interrupts = <4 IRQ_TYPE_NONE>; /* gpio line 100 */
> +
> + ti,fuzz-x = <4>;
> + ti,fuzz-y = <7>;
> + ti,fuzz-pressure = <2>;
> + ti,max-x = <4096>;
> + ti,max-y = <4096>;
> + ti,max-pressure = <2048>;
> + ti,x-plate-resistance = <280>;
> + ti,esd-recovery-timeout-ms = <8000>;
> + };
> +}
> --
> 1.8.4.3
>
> --
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next prev parent reply other threads:[~2013-12-09 17:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-05 23:09 [PATCH 0/2] tsc2005 DT binding Sebastian Reichel
2013-12-05 23:09 ` [PATCH 1/2] Input: tsc2005: add DT support Sebastian Reichel
2013-12-05 23:09 ` [PATCH 2/2] Documentation: dt: Document TSC2005 DT binding Sebastian Reichel
2013-12-09 17:46 ` Tony Lindgren [this message]
2013-12-09 18:24 ` Sebastian Reichel
2013-12-10 0:06 ` Tony Lindgren
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