Pull tty/serial driver updates from Greg KH:
 "Here is the big set of tty and serial driver patches for 4.17-rc1

  Not all that big really, most are just small fixes and additions to
  existing drivers. There's a bunch of work on the imx serial driver
  recently for some reason, and a new embedded serial driver added as
  well.

  Full details are in the shortlog.

  All of these have been in the linux-next tree for a while with no
  reported issues"

* tag 'tty-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (66 commits)
  serial: expose buf_overrun count through proc interface
  serial: mvebu-uart: fix tx lost characters
  tty: serial: msm_geni_serial: Fix return value check in qcom_geni_serial_probe()
  tty: serial: msm_geni_serial: Add serial driver support for GENI based QUP
  8250-men-mcb: add support for 16z025 and 16z057
  powerpc: Mark the variable earlycon_acpi_spcr_enable maybe_unused
  serial: stm32: fix initialization of RS485 mode
  ARM: dts: STi: Remove "console=ttyASN" from bootargs for STi boards
  vt: change SGR 21 to follow the standards
  serdev: Fix typo in serdev_device_alloc
  ARM: dts: STi: Fix aliases property name for STi boards
  tty: st-asc: Update tty alias
  serial: stm32: add support for RS485 hardware control mode
  dt-bindings: serial: stm32: add RS485 optional properties
  selftests: add devpts selftests
  devpts: comment devpts_mntget()
  devpts: resolve devpts bind-mounts
  devpts: hoist out check for DEVPTS_SUPER_MAGIC
  serial: 8250: Add Nuvoton NPCM UART
  serial: mxs-auart: disable clks of Alphascale ASM9260
  ...