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Commit e00bf607 authored by Akeem G. Abodunrin's avatar Akeem G. Abodunrin Committed by Jeff Kirsher
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igb: Implement support to power sfp cage and turn on I2C 



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: default avatarAkeem G Abodunrin <akeem.g.abodunrin@intel.com>
Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent f69aa390

drivers/net/ethernet/intel/igb/e1000_82575.c

+2 −1
Original line number Diff line number Diff line
@@ -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);