Re: [PATCH 2.6.8.1 0/2] leds: new class for led devices

[Kalin KOZHUHAROV]

John Lenz wrote:
> This is an attempt to provide an alternative to the current arm  
> specific led interface.  This arm interface does not integrate well  
> with the device model and sysfs.
I am just curious, but what specific hardware devices can be controlled with this?

[snip]

> function : a read/write attribute that sets the current function of  
> this led.  The available options are
>
>  timer : the led blinks on and off on a timer
>  idle : the led turns off when the system is idle and on when not idle
>  power : the led represents the current power state
>  user : the led is controlled by user space

Please put the power comment in the source too, e.g. :

+enum led_functions {
+	leds_user = 0,	/* user has control of this led through sysfs */
+	leds_timer,	/* led blinks on a timer */
+	leds_idle,	/* led is on when the system is not idle */
+	leds_power,	/* led is on when ?????????????????????? */
+};

To be honest, I don't get the meaning of any of the led_functions except leds_user...

> light : a read/write attribute that allows userspace to see the current  
> status of the led.  If function="user" then writing to this attribute  
> will change the led on or off.  If function != "user" then writing has  
> no effect.
>  light is an integer, where 0 means off, 1 means on first color, 2  
> means on second color, etc.  (for example, if color="green/blue" then  
> light=1 means turn led on to green and if light=2 means turn led on to  
> blue.

Is something like max_colors or num_colors necessary?
Might be handy for changing to the "last" color or something,
but it may as well be done by userspace app.


--
|| ~~~~~~~~~~~~~~~~~~~~~~ ||
(  ) http://ThinRope.net/ (  )
|| ______________________ ||

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/