mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-31 02:51:26 +00:00
52c5b31c22
This patch makes a few changes to gpio.inc.
- When pre-initialize GPIOs, set default level to low:
ENTERING_RW and USB2_OTG_VBUSSENSE.
- Disable internal pull-up (not necessary if
output type is push-pull):
USB_Cx_5V_EN.
- Set output type to open-drain:
EN_USB_Cx_3A and USB_C0_CCx_VCONN_EN.
The USB_C0_CCx_VCONN_EN is externally pulled up to PP3300_PD_A.
The EN_USB_Cx_3A is pulled to EN_USB_Cx_5V_OUT and connected
to base of BJT directly. The output current will be huge
if it is set as push-pull.
BRANCH=none
BUG=none
TEST=1. built and booted on reef_it8320.
2. plug-in a device on one port and add load current
on vbus to check if current limit sit at 3A.
Change-Id: I71fec59cd1696fff417d9cddc287e993988aea33
Signed-off-by: Dino Li <Dino.Li@ite.com.tw>
Reviewed-on: https://chromium-review.googlesource.com/528034
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>