diff options
| author |   Laurent Pinchart <laurentp@cse-semaphore.com> | 2008-11-20 13:32:23 +0100 |
|---|---|---|
| committer |   Kumar Gala <galak@kernel.crashing.org> | 2009-01-28 18:16:57 -0600 |
| commit | 7b8909940a524d67b4352c29256ada476f50fbba (patch) | |
| tree | 4de0284227e6bea6affcfd2f828ac311953d33eb /arch/powerpc/sysdev/cpm2.c | |
| parent | powerpc/fsl-booke: Make CAM entries used for lowmem configurable (diff) | |
| download | linux-dev-7b8909940a524d67b4352c29256ada476f50fbba.tar.xz linux-dev-7b8909940a524d67b4352c29256ada476f50fbba.zip | |
cpm2: Round the baud-rate clock divider to the nearest integer.
Instead of rounding the divider down, improve the baud-rate generators
accuracy by rounding to the nearest integer.
Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev/cpm2.c')
| -rw-r--r-- | 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 f1c3395633b9..474d176a6ec3 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; |