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[net-next,06/15] igb: Implement support to power sfp cage and turn on I2C

Message ID 1366327822-10741-7-git-send-email-jeffrey.t.kirsher@intel.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Kirsher, Jeffrey T April 18, 2013, 11:30 p.m. UTC 
From: "Akeem G. Abodunrin" <akeem.g.abodunrin@intel.com>

Based on original patch from Aurélien Guillaume <footplus@gmail.com>
This patch adds support to turn on I2C, with sfp cage powered.

CC: Aurélien Guillaume <footplus@gmail.com>
Signed-off-by: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igb/e1000_82575.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/ethernet/intel/igb/e1000_82575.c b/drivers/net/ethernet/intel/igb/e1000_82575.c
index 12b1d84..856364a 100644
--- a/drivers/net/ethernet/intel/igb/e1000_82575.c
+++ b/drivers/net/ethernet/intel/igb/e1000_82575.c
@@ -1420,9 +1420,10 @@  static s32 igb_setup_serdes_link_82575(struct e1000_hw *hw)
 	 */
 	wr32(E1000_SCTL, E1000_SCTL_DISABLE_SERDES_LOOPBACK);
 
-	/* power on the sfp cage if present */
+	/* power on the sfp cage if present and turn on I2C */
 	ctrl_ext = rd32(E1000_CTRL_EXT);
 	ctrl_ext &= ~E1000_CTRL_EXT_SDP3_DATA;
+	ctrl_ext |= E1000_CTRL_I2C_ENA;
 	wr32(E1000_CTRL_EXT, ctrl_ext);
 
 	ctrl_reg = rd32(E1000_CTRL);