Messages in this thread | | | Date | Tue, 10 Jan 2012 09:02:19 +1100 | From | Peter Chubb <> | Subject | USB Host port inoperative after kexec on Beagleboard |
| |
Hi Will, Thanks for the fixes to kexec for ARM that went into mainline this week. Mostly things work now.
One issue: the USB EHCI port on the (rev C2) beagleboard doesn't work after a kexec. During boot after kexec, the host device is detected and initialised, but nothing plugged in works, even when everything was working corectly before the kexec. Das U-boot must set up something that is then undone during the kexec reboot.
I've traced all calls to clk_enable() and clk_disable(), and everything looks all right --- in particular I can't see anything explicitly disabled during kexec that isn't reenabled during boot of the subsequent kernel.
Voltages that I can measure look correct on the port.
Do you have any suggestions as to what else could be wrong? -- Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia
| |