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TTY/Serial driver fixes for 5.17-rc2

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Here are some small bug fixes and reverts for reported problems with the
 tty core and drivers.  They include:
 	- revert the fifo use for the 8250 console mode.  It caused too
 	  many regressions and problems, and had a bug in it as well.
 	  This is being reworked and should show up in a later -rc1
 	  release, but it's not ready for 5.17
 	- rpmsg tty race fix
 	- restore the cyclades.h uapi header file.  Turns out a compiler
 	  test suite used it for some unknown reason.  Bring it back
 	  just for the parts that are used by the builder test so they
 	  continue to build.  No functionality is restored as no one
 	  actually has this hardware anymore, nor is it really tested.
 	- stm32 driver fixes
 	- n_gsm flow control fixes
 	- pl011 driver fix
 	- rs485 initialization fix
 
 All of these have been in linux-next this week with no reported
 problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver fixes from Greg KH:
 "Here are some small bug fixes and reverts for reported problems with
  the tty core and drivers. They include:

   - revert the fifo use for the 8250 console mode. It caused too many
     regressions and problems, and had a bug in it as well. This is
     being reworked and should show up in a later -rc1 release, but it's
     not ready for 5.17

   - rpmsg tty race fix

   - restore the cyclades.h uapi header file. Turns out a compiler test
     suite used it for some unknown reason. Bring it back just for the
     parts that are used by the builder test so they continue to build.
     No functionality is restored as no one actually has this hardware
     anymore, nor is it really tested.

   - stm32 driver fixes

   - n_gsm flow control fixes

   - pl011 driver fix

   - rs485 initialization fix

  All of these have been in linux-next this week with no reported
  problems"

* tag 'tty-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  kbuild: remove include/linux/cyclades.h from header file check
  serial: core: Initialize rs485 RTS polarity already on probe
  serial: pl011: Fix incorrect rs485 RTS polarity on set_mctrl
  serial: stm32: fix software flow control transfer
  serial: stm32: prevent TDR register overwrite when sending x_char
  tty: n_gsm: fix SW flow control encoding/handling
  serial: 8250: of: Fix mapped region size when using reg-offset property
  tty: rpmsg: Fix race condition releasing tty port
  tty: Partially revert the removal of the Cyclades public API
  tty: Add support for Brainboxes UC cards.
  Revert "tty: serial: Use fifo in 8250 console driver"
This commit is contained in:
Linus Torvalds 2022-01-29 15:23:13 +02:00
commit bb37101b36
10 changed files with 205 additions and 106 deletions
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35
include/uapi/linux/cyclades.h Normal file
View file

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_CYCLADES_H
#define _UAPI_LINUX_CYCLADES_H
#warning "Support for features provided by this header has been removed"
#warning "Please consider updating your code"
struct cyclades_monitor {
unsigned long int_count;
unsigned long char_count;
unsigned long char_max;
unsigned long char_last;
};
#define CYGETMON 0x435901
#define CYGETTHRESH 0x435902
#define CYSETTHRESH 0x435903
#define CYGETDEFTHRESH 0x435904
#define CYSETDEFTHRESH 0x435905
#define CYGETTIMEOUT 0x435906
#define CYSETTIMEOUT 0x435907
#define CYGETDEFTIMEOUT 0x435908
#define CYSETDEFTIMEOUT 0x435909
#define CYSETRFLOW 0x43590a
#define CYGETRFLOW 0x43590b
#define CYSETRTSDTR_INV 0x43590c
#define CYGETRTSDTR_INV 0x43590d
#define CYZSETPOLLCYCLE 0x43590e
#define CYZGETPOLLCYCLE 0x43590f
#define CYGETCD1400VER 0x435910
#define CYSETWAIT 0x435912
#define CYGETWAIT 0x435913
#endif /* _UAPI_LINUX_CYCLADES_H */