| # |
| # MMC/SD card drivers |
| # |
| |
| comment "MMC/SD 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_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 SDIO_UART |
| tristate "SDIO UART/GPS class support" |
| depends on MMC |
| help |
| SDIO function driver for SDIO cards that implements the UART |
| class, as well as the GPS class which appears like a UART. |
| |
