>> There is not the patch zynq-Add-fpga-support-to-u-boot-SPL.patch in pyro. > >That patch was removed as it was never upstreamed or updated for newer >u-boot's, and was replaced with the >auto generated uEnv.txt which uses U-Boot >to do the bitstream loading by default.
Ok. >> So my question is : Am I missing something ? >> >> I think u-boot can’t read the MAC address if the bitstream is not >> loaded before u-boot try to read it. > >That is right, its a limitation of using the PL for I2C EEPROM which provides >boot data, the same limits apply to >most u-boot functionality if the device >being accessed is in the PL. > >If you are making a design that has the MAC address in an I2C EEPROM, I would >recommend that you attach it to >the MIO I2C, or if you are using SPI flash >store it there. > >If you are stuck with using the I2C EEPROM via the PL you have a number of >options, here are just some ideas >that come to mind. > Thank you Nathan ! I hesitate between 2 of these solutions. Option 1 is a bit stuffed ! The option 2 or the option 3 are nice. I'm not familiar with patch and u-boot though. Which will be the most easy to your mind ? And do you have an idea where should I begin ? The option 4 is impossible because it need access ethernet during u-boot. >* Do some trickery with U-Boot and environment setup to run U-Boot loading the >bitstream then re-load U-Boot >* Modify U-Boot to allow reloading of the MAC via a cmd, which is executed >after you have loaded the bitstream >* Use the SPL patch to load the bitstream early >* On first boot into linux load the EEPROM content and store it in the u-boot >environment in the flash/etc. Or >just load it in linux if you are not using >the ethernet during boot. >> >> Also, I find in pyro the uenv.txt is generated, very nice ! >> >> But in case the bitstream will be load in u-boot SPL, it will cause issue ? >> Since the uenv.txt load it in u-boot. >You would just be loading the bitstream twice which would slow the boot time >down. But it should be >functional. Though you can remove the bitstream load >from the uEnv.txt. Ok, no problem with that. >Regards, >Nathan Regards, Yohan -- _______________________________________________ meta-xilinx mailing list [email protected] https://lists.yoctoproject.org/listinfo/meta-xilinx
