diff options
| author | Jean-Jacques Hiblot <jjhiblot@ti.com> | 2017-11-30 17:44:01 +0100 |
|---|---|---|
| committer | Jaehoon Chung <jh80.chung@samsung.com> | 2018-01-12 18:11:04 +0900 |
| commit | f99c2efe5672d7355a632dcae3551ffadea1163a (patch) | |
| tree | bd12a9d5857427fb65aca36c0640b5e594e82865 /drivers/mmc/Kconfig | |
| parent | d8e3d420891a5563fb307871581092c57aa1191e (diff) | |
mmc: make UHS and HS200 optional
Supporting USH and HS200 increases the code size as it brings in IO voltage
control, tuning and fatter data structures.
Use Kconfig configuration to select which of those features should be
built in.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Diffstat (limited to 'drivers/mmc/Kconfig')
| -rw-r--r-- | drivers/mmc/Kconfig | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index c34ab219e8..2fcdaddf22 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -51,6 +51,52 @@ config MMC_QUIRKS are enabled by default, other may require additionnal flags or are enabled by the host driver. +config MMC_IO_VOLTAGE + bool "Support IO voltage configuration" + help + IO voltage configuration allows selecting the voltage level of the IO + lines (not the level of main supply). This is required for UHS + support. For eMMC this not mandatory, but not enabling this option may + prevent the driver of using the faster modes. + +config SPL_MMC_IO_VOLTAGE + bool "Support IO voltage configuration in SPL" + default n + help + IO voltage configuration allows selecting the voltage level of the IO + lines (not the level of main supply). This is required for UHS + support. For eMMC this not mandatory, but not enabling this option may + prevent the driver of using the faster modes. + +config MMC_UHS_SUPPORT + bool "enable UHS support" + depends on MMC_IO_VOLTAGE + 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_UHS_SUPPORT + bool "enable UHS support in SPL" + depends on SPL_MMC_IO_VOLTAGE + 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 MMC_HS200_SUPPORT + bool "enable HS200 support" + help + The HS200 mode is support by some eMMC. The bus frequency is up to + 200MHz. This mode requires tuning the IO. + + +config SPL_MMC_HS200_SUPPORT + bool "enable HS200 support in SPL" + help + The HS200 mode is support by some eMMC. The bus frequency is up to + 200MHz. This mode requires tuning the IO. + config MMC_VERBOSE bool "Output more information about the MMC" default y |