On Wed, 2004-11-10 at 11:30, Andrew Wozniak wrote:
Hello everyone,
In debugging the network component of U-Boot, someone mentioned that a RTC might be required for proper operation. Unlike the OCOTEA board, we do NOT have a RTC. After examining all the READMEs and looking at source code, I don't see any dependency on a RTC. Can anyone confirm this?
Hunh???
Are you using the Cicada/Vitesse phy that is on the ocotea?
There is a gotcha with that phy. IIRC, our in house board doesn't have the 13" of trace, so I had to set a bit.
From 440gx_enet.c /* Note: slightly hacked for use with our metrobox
system */
#if defined(CONFIG_440_GX) #if defined(CONFIG_CIS8201_PHY) /* * Cicada 8201 PHY needs to have an extended register whacked * for RGMII mode. */ if ( ((devnum == 2) || (devnum ==3)) && (4 == ethgroup) ) { #if defined(CONFIG_METROBOX) miiphy_write (reg, 23, 0x1300); #else miiphy_write (reg, 23, 0x1200); #endif
This is just above the vsc8201/cis8201 errata code.
Specifically, bit 8 enables RGMII skew timing compensation.
As for requiring an RTC, I _*REALLY*_ don't see how one has to do with the other.
Good luck,
Travis