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igb: Implement support to power sfp cage and turn on I2C

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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>
This commit is contained in:
Akeem G. Abodunrin 2013-01-29 10:15:26 +00:00 committed by Jeff Kirsher
parent f69aa3909e
commit e00bf607ea
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/intel/igb/e1000_82575.c
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@ -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);