[PATCH] cpm2: Round the baud-rate clock divider to the nearest integer.
flat view
STALE6488d
From: Laurent Pinchart <hidden>
Date: 2008-11-20 12:32:26
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Instead of rounding the divider down, improve the baud-rate generators
accuracy by rounding to the nearest integer.
Signed-off-by: Laurent Pinchart <redacted>
---
arch/powerpc/sysdev/cpm2.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/sysdev/cpm2.c b/arch/powerpc/sysdev/cpm2.c
index f1c3395..474d176 100644
--- a/arch/powerpc/sysdev/cpm2.c
+++ b/arch/powerpc/sysdev/cpm2.c@@ -129,7 +129,8 @@ void __cpm2_setbrg(uint brg, uint rate, uint clk, int div16, int src) brg -= 4; } bp += brg; - val = (((clk / rate) - 1) << 1) | CPM_BRG_EN | src; + /* Round the clock divider to the nearest integer. */ + val = (((clk * 2 / rate) - 1) & ~1) | CPM_BRG_EN | src; if (div16) val |= CPM_BRG_DIV16;
--
1.5.6.3
--
Laurent Pinchart
CSE Semaphore Belgium
Chaussee de Bruxelles, 732A
B-1410 Waterloo
Belgium
T +32 (2) 387 42 59
F +32 (2) 387 42 75