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[0/8] Fixes and cleanup for RS485

Message ID 20220622154659.8710-1-LinoSanfilippo@gmx.de
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Series Fixes and cleanup for RS485 | expand


Lino Sanfilippo June 22, 2022, 3:46 p.m. UTC
From: Lino Sanfilippo <l.sanfilippo@kunbus.com>

The following series includes cleanup and fixes around RS485 in the serial
core and uart drivers:

Patch 1: Only request the rs485 termination gpio if it is supported.
Patch 2: Set the rs485 termination GPIO in the serial core. This is needed
	 since if the gpio is only accessible in sleepable context. It also
	 is a further step to make the RS485 handling more generic.
Patch 3: Move sanitizing of RS485 delays into an own function. This is in 
	 preparation of patch 4.
Patch 4: Sanitize RS485 delays read from device tree.
Patch 5: Correct RS485 delays in binding documentation.
Patch 6: Remove redundant code in 8250_dwlib.
Patch 7: Remove redundant code in ar933x.
Patch 8: Remove redundant code in 8250-lpc18xx.

This patchset is based tty-testing.

Lino Sanfilippo (8):
  serial: core: only get RS485 termination gpio if supported
  serial: core, 8250: set RS485 termination gpio in serial core
  serial: core: move sanitizing of RS485 delays into own function
  serial: core: sanitize RS485 delays read from device tree
  dt_bindings: rs485: Correct delay values
  serial: 8250_dwlib: remove redundant sanity check for RS485 flags
  serial: ar933x: Remove redundant assignment in rs485_config
  serial: 8250: lpc18xx: Remove redundant sanity check for RS485 flags

 .../devicetree/bindings/serial/rs485.yaml     |  4 +-
 drivers/tty/serial/8250/8250_dwlib.c          | 10 +--
 drivers/tty/serial/8250/8250_lpc18xx.c        |  6 +-
 drivers/tty/serial/8250/8250_port.c           |  3 -
 drivers/tty/serial/ar933x_uart.c              |  1 -
 drivers/tty/serial/serial_core.c              | 85 ++++++++++++-------
 6 files changed, 59 insertions(+), 50 deletions(-)

base-commit: df36f3e3fbb76d30d623a1623e31e3ce9c2fa750