[PATCH v3 0/8] Fixes and cleanup for RS485

From: Lino Sanfilippo
Date: Sun Jul 10 2022 - 11:04:28 EST


From: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>

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

Patch 1: ar933x: Fix check for RS485 support
Patch 2: Remove superfluous code in ar933x.
Patch 3: 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 4: Move sanitizing of RS485 delays into an own function. This is in
preparation of patch 4.
Patch 5: Sanitize RS485 delays read from device tree.
Patch 6: Correct RS485 delays in binding documentation.
Patch 7: Remove redundant code in 8250_dwlib.
Patch 8: Remove redundant code in 8250-lpc18xx.

Changes in v3:
- remove obsolete patch (due to changes by Ilpo)
- corrected and rephrase commit messages (pointed out by Andy)
- remove superfluous check (pointed out by Andy)
- separate ar933x UART bugfix and cleanup into different patches (as
suggested by Ilpo)
- put the ar933x fix at the beginning of the series (as suggested by Andy)

Changes in v2:
- print a warning if termination GPIO is specified in DT/ACPI but is not
supported by driver
- fixed commit message for devtree documentation (as suggested by Andy)
- fixed code comment
- added patch 7


Lino Sanfilippo (8):
serial: ar933x: Fix check for RS485 support
serial: ar933x: Remove superfluous code in ar933x_config_rs485()
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: 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 | 18 ++----
drivers/tty/serial/serial_core.c | 60 ++++++++++++-------
6 files changed, 50 insertions(+), 51 deletions(-)


base-commit: 7e5b4322cde067e1d0f1bf8f490e93f664a7c843
--
2.25.1