Re: input question: ambient light sensor button

On Tuesday 19 November 2013 22:27:36 Dmitry Torokhov wrote:

On Thu, Nov 14, 2013 at 01:02:31PM +0100, Pali Rohár wrote:

quoted

On Wednesday 13 November 2013 17:28:40 Dmitry Torokhov wrote:

quoted

On Wed, Nov 13, 2013 at 11:47:18AM +0100, Jiri Kosina wrote:

quoted

On Sun, 15 Sep 2013, Pali Rohár wrote:

quoted

I do not know where to ask this question, but I think
that kernel developers could help me.

I have notebook with one special button on keyboard
which is designed for turning ambient light sensor on
and off. By default pressing button do nothing (I can
turn ambient light sensor on/off via sysfs platform
wmi module). Button press is reported by kernel input
device AT Translated Set 2 keyboard and reports it as
button "touchpad off".

Of course "touchpad off" is incorrect and I'd like to
ask which kernel key or button from
/usr/include/linux/input.h should be mapped for my
ambient light sensor button? Is there already some?
And what is strategy for allocating KEY_* and BTN_*
numbers?

This is maintained by Dmitry, so he's the one to answer
this. I am adding him to CC.

I guess we need patch adding

	#define KEY_ALS_TOGGLE	0x230

Thanks.

So there is no good key for als yet?

No, but if you send me a patch adding it I will gladly apply
it.

Thanks.

Ok, here is patch:

Add key code for ambient light sensor button

More notebooks have special button for enabling/disabling ambient
light sensor. This patch adding new als code to input.h header file.

Signed-off-by: Pali Rohár <redacted>

diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
index a372627..1562f10 100644
--- a/include/uapi/linux/input.h
+++ b/include/uapi/linux/input.h

@@ -719,6 +719,8 @@ struct input_keymap_entry {
 #define BTN_DPAD_LEFT		0x222
 #define BTN_DPAD_RIGHT		0x223
 
+#define KEY_ALS_TOGGLE		0x230
+
 #define BTN_TRIGGER_HAPPY		0x2c0
 #define BTN_TRIGGER_HAPPY1		0x2c0
 #define BTN_TRIGGER_HAPPY2		0x2c1

-- 
Pali Rohár
pali.rohar@gmail.com