Thread (8 messages) 8 messages, 3 authors, 2016-08-24

Re: [PATCH v2 1/2] input: misc: Add generic input driver to read encoded GPIO lines

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: 2016-08-23 20:03:46
Also in: linux-arm-kernel, linux-devicetree, linux-omap, lkml

On Tue, Aug 23, 2016 at 10:27:59AM -0500, Andrew F. Davis wrote:
On 08/23/2016 01:16 AM, Vignesh R wrote:
quoted
Add a driver to read group of GPIO lines and provide its status as a
numerical value as input event to the system. This will help in
intefacing devices, that can be connected over GPIOs, that provide input
to the system by driving GPIO lines connected to them like a rotary dial
or a switch.

For example, a rotary switch can be connected to four GPIO lines. The
status of the GPIO lines reflect the actual position of the rotary
switch dial. For example, if dial points to 9, then the four GPIO lines
connected to the switch will read HLLH(0b'1001 = 9). This value
can be reported as an ABS_* event to the input subsystem.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
---

v2: Use decoder,max-value instead of gpio-decoder,max-value.
That's not what Rob asked for. "decoder-max-value", not "decoder" vendor
prefix.

Thanks.

-- 
Dmitry
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