[U-Boot] How to access GP partitions from uboot (2015.04)
Hi!
I have created 4 hw GP partitions on the eMMC (GP1,2,3,4) and formatted with ext4 fs. I have to read the contents of these partitions from the uboot but i am not finding them in the mmc part command.
I can see them in the mmc info... U-Boot# mmc info Device: OMAP SD/MMC Manufacturer ID: fe OEM: 14e Name: MMC16 Tran Speed: 52000000 Rd Block Len: 512 MMC version 4.4.1 High Capacity: Yes Capacity: 13.5 GiB Bus Width: 8-bit Erase Group Size: 8 MiB HC WP Group Size: 16 MiB User Capacity: 13.5 GiB Boot Capacity: 16 MiB ENH RPMB Capacity: 128 KiB ENH GP1 Capacity: 256 MiB GP2 Capacity: 400 MiB GP3 Capacity: 256 MiB GP4 Capacity: 256 MiB
But when i do mmc part i only see the user data partition information..i dont see the gp partition information
U-Boot# mmc part
Partition Map for MMC device 1 -- Partition Type: DOS
Part Start Sector Num Sectors UUID Type 1 16 31280 00000000-01 0e Boot 2 31296 28181952 00000000-02 83
Do i have to enable any thing in the config to see them?
Thanks, Harsha
-- View this message in context: http://u-boot.10912.n7.nabble.com/How-to-access-GP-partitions-from-uboot-201... Sent from the U-Boot mailing list archive at Nabble.com.
I think i figured out how to access the GP partitions on the new new uboot. Solution: 1)We can only have access to one partition at a time from uboot.
2) GP partitions have to be partitioned again to be from kernel (/dev/mmcblk0gp0p1,/dev/mmcblk0gp1p1,/dev/mmcblk0gp2p1,/dev/mmcblk0gp3p1)
3) in uboot, by default mmc part will display the user data partition information.
4) To access GP1 partition issue the following commands..
mmc rescan mmc partconf 1 0 0x7 0x4 (1 = emmc, 0= bootack, 0x7= user data part, 0x4 = Access to GP) mmc part -----------Now mmc part will display the gp1p1 data. similarly for GP2 mmc rescan mmc partconf 1 0 0x7 0x5 (1 = emmc, 0= bootack, 0x7= user data part, 0x4 = Access to GP) mmc part
Thanks, Harsha
-- View this message in context: http://u-boot.10912.n7.nabble.com/How-to-access-GP-partitions-from-uboot-201... Sent from the U-Boot mailing list archive at Nabble.com.
HI HARSHA, I need Your help.In our project we are using internel emmc of 32Gb. Can u please provide how u created the GP partitions...when we are reading or writing commands in mmc we are getting partitions are not created and unsupported format..kindly let us know how you fornmatted for ext4 file sysytem...
Waiting for your reply as early as possible.. Thanks
-- View this message in context: http://u-boot.10912.n7.nabble.com/How-to-access-GP-partitions-from-uboot-201... Sent from the U-Boot mailing list archive at Nabble.com.
participants (2)
-
harsha kiran -
saikiran.jayanthi