[U-Boot] am335x board i2c_probe fails from nand boot

[matti kaasinen]

2017-01-04 6:46 GMT+02:00 Lokesh Vutla <lokeshvutla at ti.com>:

> > "Card did not respond to voltage select!" is coming from:
> > drivers/mmc/mmc.c
>
> Can you check if mmc mux is being done properly?
>

I think this message is coming because I have ejected mmc (sd card) in
order to boot from nand.

However, I went through include/configs/am335x_evm.h that I have patched
very moderately - ionly two changes:
1) disable card detect
2) feed own fdt file.
I noticed some nand related values that I'm not sure if they are correct. I
get following nand partition listed from mmc boot:
[    1.230539] Creating 10 MTD partitions on "8000000.nand":
[    1.236229] 0x000000000000-0x000000020000 : "NAND.SPL"
[    1.243121] 0x000000020000-0x000000040000 : "NAND.SPL.backup1"
[    1.250614] 0x000000040000-0x000000060000 : "NAND.SPL.backup2"
[    1.258121] 0x000000060000-0x000000080000 : "NAND.SPL.backup3"
[    1.265515] 0x000000080000-0x0000000c0000 : "NAND.u-boot-spl-os"
[    1.273167] 0x0000000c0000-0x0000001c0000 : "NAND.u-boot"
[    1.280890] 0x0000001c0000-0x0000001e0000 : "NAND.u-boot-env"
[    1.288255] 0x0000001e0000-0x000000200000 : "NAND.u-boot-env.backup1"
[    1.296430] 0x000000200000-0x000000a00000 : "NAND.kernel"
[    1.309941] 0x000000a00000-0x000010000000 : "NAND.file-system"

In am335x_evm.h there are following definitions:
#define CONFIG_SYS_NAND_U_BOOT_OFFS    0x000c0000
So, this is pointing to NAND.u-boot-spl-os, i.e os parameters in nand, not
u-boot

#define CONFIG_CMD_SPL_NAND_OFS    0x00080000 /* os parameters */
This is pointing to NAND.SPL.backup3

#define CONFIG_SYS_NAND_SPL_KERNEL_OFFS    0x00200000 /* kernel offset */
This is pointing to NAND.u-boot-env.backup1, not kernel

#define CONFIG_CMD_SPL_WRITE_SIZE    0x2000
0x2000 does not match with 0x80000 that is reserved for NAND.u-boot-spl-os
partition.


As you told, u-boot starts, so most likely these don't matter this time.

Thanks,
Matti