new uBoot commands:

status in[it]		setup GPIOs
status ge[t]		get button status
status se[t] hh		set LEDs to lower 4 bit
status se[t]		increment last state, i.e. make LEDs count
status mi[rror]		read button status and mirror to LEDs until a key is pressed
status bl[ink]		blink LEDs

lcm in[it]			initialize subsystem (DSS, GPIOs etc.)
lcm ba[cklight] dd	set backlight level (0..255)
lcm po[wer] dd		set power level (0..2)
lcm on				set lcm on
lcm of[f]			set lcm off

gps on | of[f]		control GPS receiver (and initialize UART)
gps re[ad]			read GPS NMEA from UART until a key is pressed

tsc init			initialize/enable TSC2007 through I2C2
tsc get				read current ADC values (incl. internal temp and AUX/photosensor)
tsc lo[op]			read x/y coordinates
tsc ch[oose]		somehow allow to define receptive fields and use the result to select different boot options