Re: power management

[James S. <jsi...@tr...>]

> Hmmm, I'll have to take a closer look at how powermanagement is
> implement in Linux.

I have some form of power management going. It compiles but I have to test
it tomorrow. I have to still implement a userland interface to send a
event to power down. I'm hooked on send a EV_KEY with the code being
KEY_SUSPEND or KEY_POWER. As for the touchscreen diming the light should
really be apart of the fbdev api. Especially since laptops have back and
front lights but no touchscreens usually.

> > P.S
> >    serio->write can send only one char at a time? 
> 
> Yes, it has been designed for low speed devices, where the overhead
> doesn't matter. But there is not a problem with redesigning it.

The problem I'm having is I have to create packets and send them to the
serial device. For example for the power LED on the ipaq you have to
create a led packet which is:

typedef struct {
        unsigned char OffOnBlink;       /* 0=off 1=on 2=Blink */
        unsigned char TotalTime;        /* Units of 5 seconds */
        unsigned char OnTime;           /* units of 100m/s */
        unsigned char OffTime;          /* units of 100m/s */
} LED_IN;