Hi All,
I have a plan to use Kingston as my eMMC IC v5.0.
As I know that Android 4.4.3 can only support it up to 4.5.
After some googling, I realize I need to modify some code in uboot and kernel driver.
There are what I had done.
- bootable/bootloader/uboot-imx/drivers/mmc/mmc.c
switch (ext_csd[EXT_CSD_REV]) {
case 1:
mmc->version = MMC_VERSION_4_1;
break;
case 2:
mmc->version = MMC_VERSION_4_2;
break;
case 3:
mmc->version = MMC_VERSION_4_3;
break;
case 5:
mmc->version = MMC_VERSION_4_41;
break;
case 6:
mmc->version = MMC_VERSION_4_5;
break;
+ case 7:
+ mmc->version = MMC_VERSION_5_0;
+ break;
}
- bootable/bootloader/uboot-imx/include/mmc.h
#define MMC_VERSION_5_0 (MMC_VERSION_MMC | 0x500)
- kernel_imx/drivers/mmc/core/mmc.c
card->ext_csd.rev = ext_csd[EXT_CSD_REV];
if (card->ext_csd.rev > 8) {//6
pr_err("%s: unrecognised EXT_CSD revision %d\n",
mmc_hostname(card->host), card->ext_csd.rev);
err = -EINVAL;
goto out;
}
After I rebuild my image for new modification, I burn it in to my board and boot it.
Unfortunately, it still cannot starting kernel as usual.
What else should I do ?
Did I miss any step?
Thanks in Advanced
