Hello, i have question related to using i.mx6 solo with eMMC5.1. Is it necessary to do any hardware improvements when using eMMC 5.1 ICs? Regarding the correction of the mmc.c file, I've already read.
/drivers/mmc/core/mmc.c :
if (card->ext_csd.rev > 6) { // The '6' has to be replaced with '7' For EMMC5.0
// The '6' has to be replaced with '8' For EMMC5.1
pr_err("%s: unrecognised EXT_CSD revision %d\n",
mmc_hostname(card->host), card->ext_csd.rev);
err = -EINVAL;
goto out;
}
But still there were additional questions:
1) In addition, in some cases it is necessary to change the settings of pins such as this:
#define USDHC_PAD_CTRL (PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_LOW | \
PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS)
to:
#define USDHC_PAD_CTRL (PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_LOW | \
PAD_CTL_DSE_120ohm | PAD_CTL_SRE_SLOW | PAD_CTL_HYS)
Give a comment, is it necessary to do this?
2) Have you heard that some eMMC5.1 refuse to work in high-speed mode without hardware improvements: pull up EIM_DA3 (BOOT_CFG1 [3] bit) pin to 1 for working in normal mode.
Give a comment, is it necessary to do this?
Thanks!
