From ae5f8c19827493e5a8d48c2c6a8a92201a94f08b Mon Sep 17 00:00:00 2001 From: Joakim Tjernlund Date: Tue, 23 Aug 2011 14:30:05 +0200 Subject: [PATCH] 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 Acked-by: Timur Tabi Signed-off-by: Kumar Gala --- arch/powerpc/sysdev/qe_lib/qe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c index 3363fbc..ceb09cb 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) | -- 2.7.4