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serial: MPSC: set baudrate when BRG divider is set.

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The clock to generate the desired baudrate with the MPSC is first divided
by the Baud Rate Generator (BRG) and then by the MPSC itself.  So, when the
BRG divider is changed, the MPSC divider must also be changed to generate
the correct baudrate.  During MPSC initialization, the BRG divider is
changed but the MPSC divider isn't changed until much later.  This results
in some printk's coming out garbled.  To fix that, set the MPSC divider at
the same time that the BRG divider is changed.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mark A. Greer 2008-02-04 22:27:54 -08:00 committed by Linus Torvalds
parent 3e8d4e2075
commit 7bbdc3d51c
1 changed files with 1 additions and 0 deletions
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drivers/serial/mpsc.c
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@ -612,6 +612,7 @@ static void mpsc_hw_init(struct mpsc_port_info *pi)
/* No preamble, 16x divider, low-latency, */ /* No preamble, 16x divider, low-latency, */
writel(0x04400400, pi->mpsc_base + MPSC_MMCRH); writel(0x04400400, pi->mpsc_base + MPSC_MMCRH);
mpsc_set_baudrate(pi, pi->default_baud);
if (pi->mirror_regs) { if (pi->mirror_regs) {
pi->MPSC_CHR_1_m = 0; pi->MPSC_CHR_1_m = 0;