Dear all,
In the previous patch i removed the code from the section below.
+#ifdef CONFIG_RESET_PHY_R +void reset_phy(void) +{ +#ifdef CONFIG_MACB
- /*
* Initialize ethernet HW addr prior to starting Linux,* needed for nfsroot*/- eth_init(gd->bd);
+#endif
Please do NOT do this. It's a violation of the U-Boot design principles, which clearly say that only such periphereals that are actually being used by U-Boot shall be initialized, and even if they are being used, these shall be deactivated after use.
Carelessly leaving ports or devices in an initialized stated has been the source for problems too many times before.
Don't do that.
The u-boot works but when I try to use nfs as root filesystem i encounter the following issue:
............. MACB_mii_bus: probed eth0: Atmel MACB at 0xfffc4000 irq 21 (00:00:00:00:00:00) eth0: attached PHY driver [KS8721BL] (mii_bus:phy_addr=ffffffff:01, irq=-1) .............
From previous messages i understand that the MAC is set to 00:00:00:00:00:00 which is bad.
IP-Config: Failed to open eth0
I used again setenv ethaddr 00:04:25:12:34:56 in u-boot. After saveenv and reboot i used md command to display the EMAC 0xFFFC4000 (named MACB in the driver ) registers
U-Boot> md 0xfff4c000 fff4c000: 00000000 00000000 00000000 00000000 ................ fff4c010: 00000000 00000000 00000000 00000000 ................ fff4c020: 00000000 00000000 00000000 00000000 ................ fff4c030: 00000000 00000000 00000000 00000000 ................ fff4c040: 00000000 00000000 00000000 00000000 ................ fff4c050: 00000000 00000000 00000000 00000000 ................ fff4c060: 00000000 00000000 00000000 00000000 ................ fff4c070: 00000000 00000000 00000000 00000000 ................ fff4c080: 00000000 00000000 00000000 00000000 ................ fff4c090: 00000000 00000000 00000000 00000000 ................ fff4c0a0: 00000000 00000000 00000000 00000000 ................ fff4c0b0: 00000000 00000000 00000000 00000000 ................ fff4c0c0: 00000000 00000000 00000000 00000000 ................ fff4c0d0: 00000000 00000000 00000000 00000000 ................ fff4c0e0: 00000000 00000000 00000000 00004000 .............@.. fff4c0f0: 53504932 20202020 00010154 00000190 2IPS T.......
Offset 0x98 Specific Address 1 Bottom Register EMAC_SA1B Read-write Offset 0x9C Specific Address 1 Top Register EMAC_SA1T Read-write
The register EMAC_SA1T and EMAC_SA1B coresponding to top and bottom of the MAC address are 0
Nfs works only with the ugly code that was removed.
I'm spinning in a circle :(
Please send me any suggestion.
Best regards, Cristian Birsan