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serial: Call set_custom_baudrate() thrice

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Call the function before tcsetattr() settings are known, then again
with settings prepared but not yet applied and finally a third time
after tcsetattr().

Darwin support needs this change; there custom_baud code must be
called to modify the settings passed to tcsetattr() and then again
after tcsetattr() returns.

The change should be non-functional on all currently supported systems;
current code calls set_custom_baudrate() before any tcsetattr()
settings are prepared, so we have three stages in total.

This change originates from discussion of the macOS patch proposed by
Denis Ahrens in https://review.coreboot.org/c/flashrom/+/67822

Change-Id: I40cc443cfb7bf6b212b31826d437b898cc13c427
Signed-off-by: Peter Stuge <peter@stuge.se>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/70569
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 04:02:10 +01:00
committed by Thomas Heijligen
parent 65e3554b13
commit cd84b8de76
4 changed files with 27 additions and 6 deletions
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2
custom_baud.c
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@ -19,7 +19,7 @@
#include "custom_baud.h"
/* Stub, should not get called. */
int set_custom_baudrate(int fd, unsigned int baud)
int set_custom_baudrate(int fd, unsigned int baud, const enum custom_baud_stage stage, void *tio_wanted)
{
errno = ENOSYS; /* Hoping "Function not supported" will make you look here. */
return -1;