Commit 325577c1 authored Jan 30, 2018 by Vijayavardhan Vennapusa

phy-msm-qusb-v2: Perform PHY reset after cable connect

Phy is reset during disconnect to make sure dp/dm are in high-z state
for next cable connect. If analog ldos are shared across peripherals,
turning on/off analog ldo w/o turning on digital ldo can result into
undefined behavior. Reset the phy after charger notifies cable connect
using dpdm floating regulator to reset the internal state so that
dp/dm lines are high-z when usb cable is connected.

Change-Id: I5cae00c1853693d7bd6d85de2a238a4aababe06e
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>

parent 40c1b6f6

drivers/usb/phy/phy-msm-qusb-v2.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -766,6 +766,7 @@ static int qusb_phy_dpdm_regulator_enable(struct regulator_dev *rdev)
		return ret;
		}
		qphy->dpdm_enable = true;
		qusb_phy_reset(qphy);
		}

		return ret;