From: Jaeden Amero Date: Fri, 5 Jun 2015 23:00:26 +0000 (-0500) Subject: net/phy: micrel: Center FLP timing at 16ms X-Git-Tag: omap-for-v4.2/fixes-rc1^2~134^2~112^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6270e1ae804ae781cdd3cc20eadfa4b6fb090ab7;p=pandora-kernel.git net/phy: micrel: Center FLP timing at 16ms Link failures have been observed when using the KSZ9031 with HP 1810-8G and HP 1910-8G network switches. Center the FLP timing at 16ms to help avoid intermittent link failures. >From the KSZ9031RNX and KSZ9031MNX data sheets revision 2.2, section "Auto-Negotiation Timing": The KSZ9031[RNX or MNX] Fast Link Pulse (FLP) burst-to-burst transmit timing for Auto-Negotiation defaults to 8ms. IEEE 802.3 Standard specifies this timing to be 16ms +/-8ms. Some PHY link partners need to receive the FLP with 16ms centered timing; otherwise, there can be intermittent link failures and long link-up times. The PHY data sheet recommends configuring the FLP burst registers after power-up/reset and immediately thereafter restarting auto-negotiation, so we center the FLP timing at 16ms and then restart auto-negotiation in the config_init for KSZ9031. Signed-off-by: Jaeden Amero Signed-off-by: David S. Miller --- Reading git-diff-tree failed