From 49d0a4c3ffaf1669b63d34f9cf80e0815258b05f Mon Sep 17 00:00:00 2001 From: Ian Lepore Date: Sat, 26 Apr 2014 20:27:58 +0000 Subject: [PATCH] Reword a comment block a bit; no functional changes. --- sys/dev/uart/uart_dev_imx.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/sys/dev/uart/uart_dev_imx.c b/sys/dev/uart/uart_dev_imx.c index 350c0546776e..43338febb6c6 100644 --- a/sys/dev/uart/uart_dev_imx.c +++ b/sys/dev/uart/uart_dev_imx.c @@ -131,13 +131,14 @@ imx_uart_init(struct uart_bas *bas, int baudrate, int databits, /* * The hardware has an extremely flexible baud clock: it allows setting * both the numerator and denominator of the divider, as well as a - * separate pre-divider. We simplify that problem by assuming a - * pre-divider and numerator of one because our base clock is so fast we - * can reach virtually any reasonable speed with a simple divisor. The - * numerator value actually includes the 16x over-sampling; the register - * value is the numerator-1, so we have a hard-coded 15. Note that a - * quirk of the hardware requires that both UBIR and UBMR be set back to - * back in order for the change to take effect. + * separate pre-divider. We simplify the problem of coming up with a + * workable pair of numbers by assuming a pre-divider and numerator of + * one because our base clock is so fast we can reach virtually any + * reasonable speed with a simple divisor. The numerator value actually + * includes the 16x over-sampling (so a value of 16 means divide by 1); + * the register value is the numerator-1, so we have a hard-coded 15. + * Note that a quirk of the hardware requires that both UBIR and UBMR be + * set back to back in order for the change to take effect. */ if (baudrate > 0) { baseclk = imx_ccm_uart_hz();