Hi, On 06/11/2020 03:10, Jaehoon Chung wrote: > Hi, > > I have checked U-boot on Odroid-C4 with v2020.10. > I found a problem about reset behavior. > > In my environment, > - Boot to SD-card, > - built u-boot v2020.10 with ordoid-c4_defconfig > - Referred to doc/board/amlogic/odroid-c4.rst > > > If do "reset" command after run command "mmcinfo", it didn't work anymore. > - After something to do operation relevant to MMC. (read/write or ls mmc, > etc..) > > > U-Boot 2020.10-00383-g2f27fb20151b-dirty (Nov 06 2020 - 10:37:09 +0900) > odroid-c4 > > Model: Hardkernel ODROID-C4 > SoC: Amlogic Meson SM1 (Unknown) Revision 2b:c (10:2) > DRAM: 3.8 GiB > MMC: sd@ffe05000: 0, mmc@ffe07000: 1 > In: serial > Out: serial > Err: serial > Net: eth0: ethernet@ff3f0000 > Hit any key to stop autoboot: 0 > Odroid N2> > Odroid N2> > Odroid N2> > Odroid N2> > Odroid N2> > Odroid N2> mmcinfo > Device: sd@ffe05000 > Manufacturer ID: 3 > OEM: 5344 > Name: SB16G > Bus Speed: 50000000 > Mode: SD High Speed (50MHz) > Rd Block Len: 512 > SD version 3.0 > High Capacity: Yes > Capacity: 14.8 GiB > Bus Width: 4-bit > Erase Group Size: 512 Bytes > Odroid N2> reset > resetting ... > bl31 reboot reason: 0xd > bl31 reboot reason: 0x0 > system cmd 1. > SM1:BL:511f6b:81ca2f;FEAT:A0F83180:20282000;POC:F;RCY:0;EMMC:800;NAND:81;SD?:0;SD:0;READ:0;0.0;CHK:0; > bl2_stage_init 0x01 > bl2_stage_init 0x81 > hw > id:?M1:BL:511f6b:81ca2f;FEAT:A0F83180:20282000;POC:F;RCY:0;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;
It's a new one ! > > > I didn't analyze it in more detail. I will do. But it seems that relevant to > BL2 binary. > If nothing to do before reset, it's working fine. Is this the same with SDCard ? The SDCard & eMMC regulators doesn't reset to default when resetting, causing issues with the boot ROM... maybe you'll need to reset the regulators in a reset for the Odroid C4 board. > > If someone already fixed this or I missed something to do, let me know, plz. AFAIK no, I just pushed a fix for the eMMC/SDCard clock causing read issues at 50MHz. Thanks for the patches & reports ! Neil > > Best Regards, > Jaehoon Chung >
