From: "Matt Carlson" <mcarlson@broadcom.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, andy@greyhouse.net, mcarlson@broadcom.com
Subject: [PATCH net-next 3/8] tg3: Reduce 57765 core clock when link at 10Mbps
Date: Mon, 12 Apr 2010 09:58:26 -0700 [thread overview]
Message-ID: <1271091511-11173-4-git-send-email-mcarlson@broadcom.com> (raw)
This patch reduces the core clock to 6.25MHz when operating at 10Mbps
link speed. This is needed to prevent a bug that will ultimately cause
transmits to cease.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
---
drivers/net/tg3.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index a0ab89e..3e89323 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -7654,6 +7654,11 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
val | TG3_PCIE_PL_LO_PHYCTL5_DIS_L2CLKREQ);
tw32(GRC_MODE, grc_mode);
+
+ val = tr32(TG3_CPMU_LSPD_10MB_CLK);
+ val &= ~CPMU_LSPD_10MB_MACCLK_MASK;
+ val |= CPMU_LSPD_10MB_MACCLK_6_25;
+ tw32(TG3_CPMU_LSPD_10MB_CLK, val);
}
/* This works around an issue with Athlon chipsets on
--
1.6.4.4
reply other threads:[~2010-04-12 16:58 UTC|newest]
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