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If during PMIC initialization, it is identified that there was a VR fault, then dump fault registers 0x16 and 0x17 to EC console. This information is very useful during debugging sudden power losses in field and so it is printed out to EC console. Additionally, add panic reason with these register values as panic data so that OS can provide this information in cros ec panicinfo. This helps in retaining the information even if EC console logs overflow. BUG=b:65732924,b:69334392 BRANCH=None TEST=Verified that on the failing Lux system, PMIC VR fault is reported:"PMIC VRFAULT: PWRSTAT1=0x00 PWRSTAT2=0x01". Also, verified that pmic fault register info is reported correctly in panicinfo: cat /sys/kernel/debug/cros_ec/panicinfo > /tmp/panicinfo hexdump -n 1 -s 0x14 -e '"0x""%02X""\n"' /tmp/panicinfo 0x00 hexdump -n 1 -s 0x15 -e '"0x""%02X""\n"' /tmp/panicinfo 0x01 Change-Id: Ic6096887cd66046d11a5eb1d942b635b3e48a236 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/674033 Reviewed-by: Shawn N <shawnn@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly