Kconfig revision 2c84417a1305da892c8a7d0bf8d0bad50d1688b8 
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	depends on MMC_BLOCK
20	range 4 256
21	default 8
22	help
23	  Number of minors per block device. One is needed for every
24	  partition on the disk (plus one for the whole disk).
25
26	  Number of total MMC minors available is 256, so your number
27	  of supported block devices will be limited to 256 divided
28	  by this number.
29
30	  Default is 8 to be backwards compatible with previous
31	  hardwired device numbering.
32
33	  If unsure, say 8 here.
34
35config MMC_BLOCK_BOUNCE
36	bool "Use bounce buffer for simple hosts"
37	depends on MMC_BLOCK
38	default y
39	help
40	  SD/MMC is a high latency protocol where it is crucial to
41	  send large requests in order to get high performance. Many
42	  controllers, however, are restricted to continuous memory
43	  (i.e. they can't do scatter-gather), something the kernel
44	  rarely can provide.
45
46	  Say Y here to help these restricted hosts by bouncing
47	  requests back and forth from a large buffer. You will get
48	  a big performance gain at the cost of up to 64 KiB of
49	  physical memory.
50
51	  If unsure, say Y here.
52
53config MMC_BLOCK_DEFERRED_RESUME
54	bool "Deferr MMC layer resume until I/O is requested"
55	depends on MMC_BLOCK
56	default n
57	help
58	  Say Y here to enable deferred MMC resume until I/O
59	  is requested. This will reduce overall resume latency and
60	  save power when theres an SD card inserted but not being used.
61
62config SDIO_UART
63	tristate "SDIO UART/GPS class support"
64	depends on TTY
65	help
66	  SDIO function driver for SDIO cards that implements the UART
67	  class, as well as the GPS class which appears like a UART.
68
69config MMC_TEST
70	tristate "MMC host test driver"
71	help
72	  Development driver that performs a series of reads and writes
73	  to a memory card in order to expose certain well known bugs
74	  in host controllers. The tests are executed by writing to the
75	  "test" file in debugfs under each card. Note that whatever is
76	  on your card will be overwritten by these tests.
77
78	  This driver is only of interest to those developing or
79	  testing a host driver. Most people should say N here.
80