BACKPORT: driver: uart_npcx: Fix uart to use PM constrain
The device PM callback needs to be used only to suspend/resume devices.
If the system cannot be suspended because UART is in a particular
state, the pm_constraint_set/release API should be used. For NPCX UART,
the chip can't enter low power idle state until UART completes the data
transmission.
This commit changes NPCX UART to use pm_constraint_set/release & fixes
UART lost data from low power idle.
Fix #40621
Signed-off-by: Wealian Liao <WHLIAO@nuvoton.com>
Signed-off-by: Jun Lin <CHLin56@nuvoton.com>
(cherry picked from commit 230378aebe3c569b1becb21511d119b875e8dfc8
https://github.com/zephyrproject-rtos/zephyr.git main)
BUG=none
TEST=zmake testall
Signed-off-by: Wealian Liao <whliao@nuvoton.corp-partner.google.com>
Change-Id: Id95f6500581545d57ad0272ba256245a9dbc0bb0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/3312442
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Keith Short <keithshort@chromium.org>
Commit-Queue: Keith Short <keithshort@chromium.org>
2 files changed
