usb: phy: qusb: Make sure QUSB PHY is into proper state

On some platforms, QUSB PHY's DVDD related power supply (LDO) is
not always ON. Hence when this power supply is switched off, QUSB
PHY's register configuration is not retained. QUSB PHY state
is unknown when required LDOs are turned ON with USB cable connect
case and may interfere charger detection. Hence use suggested sequence
which involves resetting QUSB PHY and performing few set of QUSB PHY
register configuration to bring QUSB PHY into non-driving mode.

Also it is required to disable QUSB2PHY level shifter by writing to
TCSR_QUSB2PHY_CLAMP_DIG_N_1P8 register during disconnect to avoid
leakage current. Hence add support for the same.

Change-Id: I30b8488a1c19815601e6a1c5bcbdeed53715f8fa
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>

0 files changed, 0 insertions, 0 deletions