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serial: Add Darwin/macOS support for custom and >230400 baudrates

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This change is based on the patch proposed by Denis Ahrens in
https://review.coreboot.org/c/flashrom/+/67822

Change-Id: I3e6b88d2b4c2a130b16456752681fd9f807bf6f0
Signed-off-by: Peter Stuge <peter@stuge.se>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/70571
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Thomas Heijligen <src@posteo.de>
This commit is contained in:
Peter Stuge
2022-12-11 16:20:16 +01:00
committed by Thomas Heijligen
parent cd84b8de76
commit 03c36be3b6
4 changed files with 71 additions and 0 deletions
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serial.c
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@ -47,6 +47,10 @@ fdtype sp_fd = SER_INV_FD;
* On Linux there is a non-standard way to use arbitrary baud rates that we use if there is no
* matching standard rate, see custom_baud.c
*
* On Darwin there is also a non-standard ioctl() to set arbitrary baud rates
* and any above 230400, see custom_baud_darwin.c and
* https://opensource.apple.com/source/IOSerialFamily/IOSerialFamily-91/tests/IOSerialTestLib.c.auto.html
*
* On Windows there exist similar macros (starting with CBR_ instead of B) but they are only defined for
* backwards compatibility and the API supports arbitrary baud rates in the same manner as the macros, see
* http://msdn.microsoft.com/en-us/library/windows/desktop/aa363214(v=vs.85).aspx