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Diffstat (limited to 'drivers/mmc/Kconfig')
| -rw-r--r-- | drivers/mmc/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 3c4f057373..8f56572c39 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -727,6 +727,21 @@ config FSL_ESDHC This selects support for the eSDHC (Enhanced Secure Digital Host Controller) found on numerous Freescale/NXP SoCs. +config FSL_ESDHC_33V_IO_RELIABILITY_WORKAROUND + bool "enable eSDHC workaround for 3.3v IO reliability issue" + depends on FSL_ESDHC && DM_MMC + default n + help + When eSDHC operates at 3.3v, damage can accumulate in an internal + level shifter at a higher than expected rate. The faster the interface + runs, the more damage accumulates. This issue now is found on LX2160A + eSDHC1 for only SD card. The hardware workaround is recommended to use + an on-board level shifter that is 1.8v on SoC side and 3.3v on SD card + side. For boards without hardware workaround, this option could be + enabled, ensuring 1.8v IO voltage and disabling eSDHC if no card. + This option assumes no hotplug, and u-boot has to make all the way to + to linux to use 1.8v UHS-I speed mode if has card. + config FSL_ESDHC_IMX bool "Freescale/NXP i.MX eSDHC controller support" help |