[Letux-kernel] GPIO 174

Andreas Kemnade andreas at kemnade.info
Mon Feb 5 11:03:23 CET 2018


Hi,

GPIO 174 seems strange:

# devmem2 0x480021CC w
/dev/mem opened.
Memory mapped at address 0xb6f1b000.
Value at address 0x480021CC (0xb6f1b1cc): 0x11C011C

So it is configured as *input*? uboot configures it as such.
Is that correct? Or am I misreading something.

# devmem2 0x4905803C w
/dev/mem opened.
Memory mapped at address 0xb6f25000.
Value at address 0x4905803C (0xb6f2503c): 0x0

It seems to react properly on ehci-omap actions

root at gta04:~# devmem2 0x4905803C w
/dev/mem opened.
Memory mapped at address 0xb6f9d000.
Value at address 0x4905803C (0xb6f9d03c): 0x4000
root at gta04:~# rmmod ehci-omap
root at gta04:~# devmem2 0x4905803C w
/dev/mem opened.
Memory mapped at address 0xb6f25000.
Value at address 0x4905803C (0xb6f2503c): 0x0

Regards,
Andreas
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