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| author | Weijie Gao <weijie.gao@mediatek.com> | 2021-03-05 05:35:39 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2021-03-20 23:24:27 +0300 |
| commit | 0b9f1ae5867df2e71bd4b98d675095a3417426d7 (patch) | |
| tree | 7b6192b1ffa1cf8e88bc62a466a93b367b0da832 /Makefile | |
| parent | e8b98f02708c23fe32e7e26fac56acf9e12a5b8d (diff) | |
| download | u-boot-0b9f1ae5867df2e71bd4b98d675095a3417426d7.tar.xz | |
serial: mtk: rewrite the setbrg function
Currently the setbrg logic of serial-mtk is messy, and should be rewritten.
Also an option is added to make it possible to use highspeed-3 mode for all
bauds.
The new logic is:
1. If baud clock > 12MHz
a) If baud <= 115200, highspeed-0 mode will be used (ns16550 compatible)
b) If baud <= 576000, highspeed-2 mode will be used
c) any bauds > 576000, highspeed-3 mode will be used
2. If baud clock <= 12MHz
Forced highspeed-3 mode
a) If baud <= 115200, calculates the divisor using DIV_ROUND_CLOSEST
b) any bauds > 115200, the same as 1. c)
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions