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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2017-03-20 10:05:38 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-07-18 18:40:27 +0100 |
| commit | a3cd4f8cc50f566e249f641660d8140146d015d3 (patch) | |
| tree | d7aa6bc9ba7328357756e82d470a4434e0d54678 /include/linux/errqueue.h | |
| parent | c7c3271648c480c81a7eed201c4ff45a46cec8d8 (diff) | |
serial: mxs-auart: Fix baudrate calculation
commit a6040bc610554c66088fda3608ae5d6307c548e4 upstream.
The reference manual for the i.MX28 recommends to calculate the divisor
as
divisor = (UARTCLK * 32) / baud rate, rounded to the nearest integer
, so let's do this. For a typical setup of UARTCLK = 24 MHz and baud
rate = 115200 this changes the divisor from 6666 to 6667 and so the
actual baud rate improves from 115211.521 Bd (error ≅ 0.01 %) to
115194.240 Bd (error ≅ 0.005 %).
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.16: adjust context, indentation]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/linux/errqueue.h')
0 files changed, 0 insertions, 0 deletions