diff options
| author | Joakim Tjernlund <Joakim.Tjernlund@transmode.se> | 2011-08-23 14:30:05 +0200 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-12-26 22:07:13 +0800 |
| commit | ae10a25ae45e7e7937445559212f53cb6bf91712 (patch) | |
| tree | 79dc624858573ebe26b9bface8669bfce3f1b2ad /arch/powerpc/sysdev | |
| parent | fad6f56c628b5ede9772b0f5da6580f03ede1894 (diff) | |
powerpc/qe: Fixup QE_General4 errata
QE_General4 should only round up the divisor iff divisor is > 3.
Rounding up lower divisors makes the error too big, causing USB
on MPC832x to fail.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/qe_lib/qe.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c index 3363fbc964f..ceb09cbd232 100644 --- a/arch/powerpc/sysdev/qe_lib/qe.c +++ b/arch/powerpc/sysdev/qe_lib/qe.c @@ -216,7 +216,7 @@ int qe_setbrg(enum qe_clock brg, unsigned int rate, unsigned int multiplier) /* Errata QE_General4, which affects some MPC832x and MPC836x SOCs, says that the BRG divisor must be even if you're not using divide-by-16 mode. */ - if (!div16 && (divisor & 1)) + if (!div16 && (divisor & 1) && (divisor > 3)) divisor++; tempval = ((divisor - 1) << QE_BRGC_DIVISOR_SHIFT) | |