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.
+
+config MMC_TEST
+ tristate "MMC host test driver"
+ default n
+ 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 sysfs 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.