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authorHans de Goede <hdegoede@redhat.com>2017-04-05 00:04:51 +0200
committerChanwoo Choi <cw00.choi@samsung.com>2017-04-06 10:55:25 +0900
commit585cb239f4de6c11349e900dd8b4d8cf0825e802 (patch)
treeb940e281be3f89c6e1b5e8f36cdc57bdc3779337 /drivers/nvmem
parentc9d0f1d121cf038afc787ceb03d60798a1db389b (diff)
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extcon: intel-cht-wc: Disable external 5v boost converter on probe
Disable the 5v boost converter on probe in case it was left on by the BIOS, this fixes 2 problems: 1) This gets seen by the external battery charger as a valid Vbus supply and it then tries to feed Vsys from this creating a feedback loop which causes aprox. 300 mA extra battery drain (and unless we drive the external-charger-disable pin high it also tries to charge the battery causing even more feedback). 2) This gets seen by the pwrsrc block as a SDP USB Vbus supply Since the external battery charger has its own 5v boost converter which does not have these issues, we simply turn the separate external 5v boost converter off and leave it off entirely. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
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