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Message-ID: <w4y5tgwn4k.wl%peter@chubb.wattle.id.au> Date: Tue, 10 Jan 2012 09:02:19 +1100 From: Peter Chubb <peter.chubb@...ta.com.au> To: Will.deacon@....org CC: linux-kernel@...r.kernel.org, kexec@...ts.infradead.org, linux-omap@...r.kernel.org 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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