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authorTobias Diedrich <ranma+coreboot@tdiedrich.de>2016-03-13 21:19:45 +0100
committerMartin Roth <martinroth@google.com>2016-03-15 21:38:20 +0100
commit3385ebe59a452ce66e0180641de271b028a41e7e (patch)
tree7d01ddbe4e70afb140e90e4bbfdf04f5c731bca2 /src/mainboard/bifferos
parent8ebb95d0c8e9088c9961cf3f8a3fdfed17f0247e (diff)
pcengines/apu1: Enable USB overcurrent detection.
The two external USB ports and the internal USB header have overcurrent protection chips with the low-active overcurrent signal connected to the chipset. The power-on default for this register disables the software detection of overcurrent conditions. After setting the register Linux correctly shows the overcurrent condition in the kernel log (tested by shorting the 5v and gnd lines on J14 / the internal USB header): [ 2015.229921] usb usb1-port3: over-current condition [ 2015.449925] usb usb1-port4: over-current condition Simlar for the external ports: [ 256.237916] usb usb1-port1: over-current condition [ 256.458084] usb usb1-port5: over-current condition Note that each signal is shared between two ports: usboc0#: External ports (port1/5) usboc1#: Internal ports (port3/4) Change-Id: I02d498053b8ec61dc206e74a96c4a1dcfd4fae92 Signed-off-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de> Reviewed-on: https://review.coreboot.org/14084 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Martin Roth <martinroth@google.com>
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