Kconfig revision 5e71b7a64cb4c6cff75ca42b535d8227526ec592 
1#
2# MMC/SD card drivers
3#
4
5comment "MMC/SD/SDIO Card Drivers"
6
7config MMC_BLOCK
8	tristate "MMC block device driver"
9	depends on BLOCK
10	default y
11	help
12	  Say Y here to enable the MMC block device driver support.
13	  This provides a block device driver, which you can use to
14	  mount the filesystem. Almost everyone wishing MMC support
15	  should say Y or M here.
16
17config MMC_BLOCK_MINORS
18	int "Number of minors per block device"
19	range 4 256
20	default 8
21	help
22	  Number of minors per block device. One is needed for every
23	  partition on the disk (plus one for the whole disk).
24
25	  Number of total MMC minors available is 256, so your number
26	  of supported block devices will be limited to 256 divided
27	  by this number.
28
29	  Default is 8 to be backwards compatible with previous
30	  hardwired device numbering.
31
32	  If unsure, say 8 here.
33
34config MMC_BLOCK_BOUNCE
35	bool "Use bounce buffer for simple hosts"
36	depends on MMC_BLOCK
37	default y
38	help
39	  SD/MMC is a high latency protocol where it is crucial to
40	  send large requests in order to get high performance. Many
41	  controllers, however, are restricted to continuous memory
42	  (i.e. they can't do scatter-gather), something the kernel
43	  rarely can provide.
44
45	  Say Y here to help these restricted hosts by bouncing
46	  requests back and forth from a large buffer. You will get
47	  a big performance gain at the cost of up to 64 KiB of
48	  physical memory.
49
50	  If unsure, say Y here.
51
52config SDIO_UART
53	tristate "SDIO UART/GPS class support"
54	help
55	  SDIO function driver for SDIO cards that implements the UART
56	  class, as well as the GPS class which appears like a UART.
57
58config MMC_TEST
59	tristate "MMC host test driver"
60	default n
61	help
62	  Development driver that performs a series of reads and writes
63	  to a memory card in order to expose certain well known bugs
64	  in host controllers. The tests are executed by writing to the
65	  "test" file in sysfs under each card. Note that whatever is
66	  on your card will be overwritten by these tests.
67
68	  This driver is only of interest to those developing or
69	  testing a host driver. Most people should say N here.
70