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authorMatt Carlson <mcarlson@broadcom.com>2008-05-03 01:47:53 +0200
committerDavid S. Miller <davem@davemloft.net>2008-05-03 01:47:53 +0200
commit8ef214288622bf523a3b3096958292a1c63132ad (patch)
treea9c1139ca15d642ec14a423d1ea163be81fbbce9 /drivers/net/tg3.h
parenthci_usb.h: fix hard-to-trigger race (diff)
downloadlinux-8ef214288622bf523a3b3096958292a1c63132ad.tar.xz
linux-8ef214288622bf523a3b3096958292a1c63132ad.zip
tg3: Use constant 500KHz MI clock on adapters with a CPMU
The MI clock is not configured correctly on adapters with the CPMU present. The tg3 driver has code which statically sets the MI clock to be a fraction of the speed at which the core clock is running. However, the CPMU can change the adapter's core clock frequency based on operating conditions. Consequently, the MI will run slow when the core's clock has been slowed down. There is a new 500KHz constant frequency clock available on adapters with a CPMU. This patch removes the static core clock scaling and configures the MI clock to use this new 500KHz clock instead. Running the MI clock at slower speeds will not directly result in data corruption, but it does challenge the PHY read and write routine timeouts. Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tg3.h')
-rw-r--r--drivers/net/tg3.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index c688c3ac5035..ce2be3a96175 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -415,7 +415,7 @@
#define MAC_MI_MODE_CLK_10MHZ 0x00000001
#define MAC_MI_MODE_SHORT_PREAMBLE 0x00000002
#define MAC_MI_MODE_AUTO_POLL 0x00000010
-#define MAC_MI_MODE_CORE_CLK_62MHZ 0x00008000
+#define MAC_MI_MODE_500KHZ_CONST 0x00008000
#define MAC_MI_MODE_BASE 0x000c0000 /* XXX magic values XXX */
#define MAC_AUTO_POLL_STATUS 0x00000458
#define MAC_AUTO_POLL_ERROR 0x00000001