Hi,

Here are v4 patches for serial port generic PM. The scope has now expanded
a bit from the earlier attempts to get rid of pm_runtime_irq_safe() for
the 8250_omap driver. I've now picked up three patches from Andy's earlier
generic serial port PM series.

Regards,

Tony

Changes since v3:
- Pick three patches from Andy's earlier serial port PM series to handle
  issues pointed out by Johan

Chganges since v2:

- Use locking instead of atomic_t as suggested by Greg

Changes since v1:

- Separated out line discipline patches, n_tty -EAGAIN change I still
  need to retest

- Changed prep_tx() to more generic wakeup() as also flow control needs it

- Changed over to using wakeup() with device driver runtime PM instead
  of write_room()

- Added runtime_suspended flag for drivers and generic serial layer PM
  to use

Andy Shevchenko (3):
  serial: core: Add support of runtime PM
  serial: 8250_port: properly handle runtime PM in IRQ
  serial: 8250_port: Remove calls to runtime PM

Tony Lindgren (4):
  serial: core: Add wakeup() and start_pending_tx() for asynchronous
    wake
  serial: 8250: Implement wakeup for TX and use it for 8250_omap
  serial: 8250_omap: Require a valid wakeirq for deeper idle states
  serial: 8250_omap: Drop the use of pm_runtime_irq_safe()

 Documentation/driver-api/serial/driver.rst |   9 +
 drivers/tty/serial/8250/8250.h             |   3 -
 drivers/tty/serial/8250/8250_omap.c        |  44 +++--
 drivers/tty/serial/8250/8250_port.c        | 151 ++++++++--------
 drivers/tty/serial/serial_core.c           | 199 +++++++++++++++++++--
 include/linux/serial_core.h                |   3 +
 6 files changed, 305 insertions(+), 104 deletions(-)

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2.33.1