From: Mark A. Greer 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 Signed-off-by: Andrew Morton --- drivers/serial/mpsc.c | 1 + 1 file changed, 1 insertion(+) diff -puN drivers/serial/mpsc.c~serial-mpsc-set-baudrate-when-brg-divider-is-set drivers/serial/mpsc.c --- a/drivers/serial/mpsc.c~serial-mpsc-set-baudrate-when-brg-divider-is-set +++ a/drivers/serial/mpsc.c @@ -612,6 +612,7 @@ static void mpsc_hw_init(struct mpsc_por /* No preamble, 16x divider, low-latency, */ writel(0x04400400, pi->mpsc_base + MPSC_MMCRH); + mpsc_set_baudrate(pi, pi->default_baud); if (pi->mirror_regs) { pi->MPSC_CHR_1_m = 0; _