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- #
- # MMC/SD card drivers
- #
- comment "MMC/SD/SDIO Card Drivers"
- config MMC_BLOCK
- tristate "MMC block device driver"
- depends on BLOCK
- default y
- help
- Say Y here to enable the MMC block device driver support.
- This provides a block device driver, which you can use to
- mount the filesystem. Almost everyone wishing MMC support
- should say Y or M here.
- config MMC_BLOCK_MINORS
- int "Number of minors per block device"
- depends on MMC_BLOCK
- range 4 256
- default 8
- help
- Number of minors per block device. One is needed for every
- partition on the disk (plus one for the whole disk).
- Number of total MMC minors available is 256, so your number
- of supported block devices will be limited to 256 divided
- by this number.
- Default is 8 to be backwards compatible with previous
- hardwired device numbering.
- If unsure, say 8 here.
- config MMC_BLOCK_BOUNCE
- bool "Use bounce buffer for simple hosts"
- depends on MMC_BLOCK
- default y
- help
- SD/MMC is a high latency protocol where it is crucial to
- send large requests in order to get high performance. Many
- controllers, however, are restricted to continuous memory
- (i.e. they can't do scatter-gather), something the kernel
- rarely can provide.
- Say Y here to help these restricted hosts by bouncing
- requests back and forth from a large buffer. You will get
- a big performance gain at the cost of up to 64 KiB of
- physical memory.
- If unsure, say Y here.
- config MMC_BLOCK_DEFERRED_RESUME
- bool "Deferr MMC layer resume until I/O is requested"
- depends on MMC_BLOCK
- default n
- help
- Say Y here to enable deferred MMC resume until I/O
- is requested. This will reduce overall resume latency and
- save power when theres an SD card inserted but not being used.
- config SDIO_UART
- tristate "SDIO UART/GPS class support"
- help
- SDIO function driver for SDIO cards that implements the UART
- class, as well as the GPS class which appears like a UART.
- config MMC_TEST
- tristate "MMC host test driver"
- help
- Development driver that performs a series of reads and writes
- to a memory card in order to expose certain well known bugs
- in host controllers. The tests are executed by writing to the
- "test" file in debugfs under each card. Note that whatever is
- on your card will be overwritten by these tests.
- This driver is only of interest to those developing or
- testing a host driver. Most people should say N here.
- config MMC_SUPPORT_BKOPS_MODE
- tristate "Support the bkops mode of eMMC 5.0"
- help
- Say Y here to enable the bkops mode
- config MMC_BKOPS_NODE_UID
- int "User ID of BKOPS sysfs node"
- depends on MMC_SUPPORT_BKOPS_MODE
- default 0
- help
- Owner user ID of BKOPS sysfs node.
- Default is 0. Do not touch the value if unsure.
- config MMC_BKOPS_NODE_GID
- int "Group ID of BKOPS sysfs node"
- depends on MMC_SUPPORT_BKOPS_MODE
- default 0
- help
- Owner group ID of BKOPS sysfs node.
- Default is 0. Do not touch the value if unsure.
- config MMC_BLOCK_TEST
- tristate "MMC block test"
- depends on MMC_BLOCK && IOSCHED_TEST
- help
- MMC block test can be used with test iosched to test the MMC block
- device.
- Currently used to test eMMC 4.5 features (packed commands, sanitize,
- BKOPs).
- config MMC_CPRM
- tristate "MMC CPRM driver"
- default n
- help
- Say Y here to enable the MMC cprm driver
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