[Letux-kernel] twl gpios / headset detect on gta04a5

Andreas Kemnade andreas at kemnade.info
Sun Sep 23 18:51:11 CEST 2018


I am looking at the headset stuff.
The detection is at gpio492 on gta04a5 if I
understand everything right.
I exported that and no reaction there on plugging
And then I am wondering:
root at gta04:/sys/class/gpio/gpio492# twl-i2c.sh GPIO r 0x13
# twl-i2c.sh GPIO r 0x14

No pullups/downs enabled?!
Hmm, floating inputs there?!

twl-i2c.sh GPIO w 0x13 0x20

does the trick. the exported gpio shows values. But are the pullup/down
values correct there?

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