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| author | Joakim Tjernlund <Joakim.Tjernlund@transmode.se> | 2011-08-23 14:30:05 +0200 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-11-24 01:28:42 -0600 |
| commit | ae5f8c19827493e5a8d48c2c6a8a92201a94f08b (patch) | |
| tree | 2a1cfd9f1156e4bed1a4e28e414d947c2af07779 /arch/powerpc/sysdev | |
| parent | 05011f370a4f549da69f3841e319043728f65542 (diff) | |
| download | blackbird-op-linux-ae5f8c19827493e5a8d48c2c6a8a92201a94f08b.tar.gz blackbird-op-linux-ae5f8c19827493e5a8d48c2c6a8a92201a94f08b.zip | |
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 3363fbc964f8..ceb09cbd2329 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) | |
