diff options
| author | Stefan Agner <stefan.agner@toradex.com> | 2018-06-11 15:57:19 +0200 |
|---|---|---|
| committer | Stefan Agner <stefan.agner@toradex.com> | 2018-06-11 15:57:19 +0200 |
| commit | 83d1d48e59c84aec73b5dc7586c49505c027e7ce (patch) | |
| tree | d8a929558d4d01666872c8d4a5d61867d8d7796e /drivers/mmc/Kconfig | |
| parent | 67cf06ee02ba39a93fbfd4ed2e82509ec86ba53e (diff) | |
mmc: make UHS optionaltoradex_imx_v2017.03_4.9.51_imx8_beta2-bring_up
Use Kconfig to select whether UHS should be supported. This works
around issues with UHS seen on Apalis Evaluation board with some
SD cards. It seems that tuning fails. The exact reason is not known,
but since pull-ups on the carrier board are 3.3V, and UHS requires
1.8V, UHS modes should not be used by default anyway.
Inspired-by commit f99c2efe5672 ("mmc: make UHS and HS200 optional")
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Diffstat (limited to 'drivers/mmc/Kconfig')
| -rw-r--r-- | drivers/mmc/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 01d1dbfb1b..ec119522af 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -36,6 +36,13 @@ config DM_MMC_OPS if MMC +config MMC_UHS_SUPPORT + bool "enable UHS support" + help + The Ultra High Speed (UHS) bus is available on some SDHC and SDXC + cards. The IO voltage must be switchable from 3.3v to 1.8v. The bus + frequency can go up to 208MHz (SDR104) + config SPL_MMC_TINY bool "Tiny MMC framework in SPL" help |