[PATCH V3 0/3] fsl_lpuart: improve Idle Line Interrupt and registers handle in .shutdown()

[Sherry Sun]

---
Changes in V3:
1. Add the corresponding head files for GENMASK and FIELD_PREP to
avoid build break.
2. Remove the patch 2 and patch 3 in the original patch set, as the
loopback and RTS/CTS flags may not need to be cleared in .shutdown().
---

The patchset improve the Idle Line Interrupt for lpuart driver, also handle
the registers correctly for lpuart32 when closing the uart port.

Patches have been tested on imx8ulp-evk platform.

Sherry Sun (3):
  tty: serial: fsl_lpuart: only enable Idle Line Interrupt for non-dma
    case
  tty: serial: fsl_lpuart: disable Rx/Tx DMA in lpuart32_shutdown()
  tty: serial: fsl_lpuart: clear LPUART Status Register in
    lpuart32_shutdown()

 drivers/tty/serial/fsl_lpuart.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

-- 
2.17.1