lazor: Fix turning switchcap off when sysjump to RW

The polarity of the enable pins of DA9313 and LN9310 are different.
DA9313 is active-high while LN9310 is active-low. For power saving,
the enable pin of LN9310 has an external pull-up; so EC should
configure it open-drain.

The existing code causes an issue that the switchcap is turned off
when sysjump to RW. We should configure the enable pin properly.

DA9313 is GPIO-controlled without needing any configuration. So the
default setting in gpio.inc should favors DA9313, i.e. GPIO_OUT_LOW;
otherwise, DA9313 may turn on unexpectedly.

In the board init, should not set the level; otherwise, it will
override its level and shutdown the switchcap when sysjump to RW.

LN9313 is similar but a bit tricky. As the gpio.inc configures it
GPIO_OUT_LOW. When sysjump to RW, will output push-pull a short
period of time. As it outputs LOW, should be fine.

The GPIO changes like:
 (1) EC boots from RO -> high-Z
 (2) GPIO init according to gpio.inc -> push-pull LOW
 (3) This function configures it -> open-drain HIGH
 (4) Power sequence turns on the switchcap -> open-drain LOW
 (5) EC sysjumps to RW
 (6) GPIO init according to gpio.inc -> push-pull LOW
 (7) This function configures it -> open-drain LOW

BRANCH=None
BUG=b:163867792, b:151393598
TEST=Tested on Lazor: when sysjump to RW, switchcap not off.

Change-Id: Iec8ea7e16f525fa431230546d712c3e081fdab5c
Signed-off-by: Wai-Hong Tam <waihong@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2391830
Reviewed-by: Stephen Boyd <swboyd@chromium.org>

0 files changed, 0 insertions, 0 deletions