Hello.

On Tue, Nov 12, 2013 at 10:07:13AM +0000, Alexander Shiyan wrote:

quoted

This patch adds a new driver for the beeper controlled via GPIO pin.
The driver does not depend on the architecture and is positioned as
a replacement for the specific drivers that are used for this function.

Signed-off-by: Alexander Shiyan <redacted>

...

quoted

diff --git a/Documentation/devicetree/bindings/input/gpio-beeper.txt b/Documentation/devicetree/bindings/input/gpio-beeper.txt

...

quoted

+Example:
+
+beeper: input@0 {
+	compatible = "gpio-beeper";
+	reg = <0>;
+	gpios = <&gpio3 23 0>;
+};

What are the reg / unit-address for?

Just an example from "simple-bus" container.

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