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Pierre Ossman1c6a0712007-02-11 19:57:36 +01001#
2# MMC/SD card drivers
3#
4
Pierre Ossman57105732008-09-07 13:16:58 +02005comment "MMC/SD/SDIO Card Drivers"
Pierre Ossman1c6a0712007-02-11 19:57:36 +01006
7config MMC_BLOCK
8 tristate "MMC block device driver"
Jan Engelhardt790864d2007-05-08 22:30:32 +02009 depends on BLOCK
Pierre Ossman1c6a0712007-02-11 19:57:36 +010010 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
Olof Johansson5e71b7a2010-09-17 21:19:57 -040017config MMC_BLOCK_MINORS
18 int "Number of minors per block device"
Chris Ballb37427b2011-01-04 12:39:20 -050019 depends on MMC_BLOCK
Olof Johansson5e71b7a2010-09-17 21:19:57 -040020 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
Pierre Ossman98ccf142007-05-12 00:26:16 +020035config 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
Nicolas Pitre6e418a92007-06-30 02:04:21 -040053config SDIO_UART
54 tristate "SDIO UART/GPS class support"
Joe Millenbach4f73bc42013-01-17 22:44:22 -080055 depends on TTY
Nicolas Pitre6e418a92007-06-30 02:04:21 -040056 help
57 SDIO function driver for SDIO cards that implements the UART
58 class, as well as the GPS class which appears like a UART.
59
Pierre Ossman88ae6002007-08-12 14:23:50 +020060config MMC_TEST
61 tristate "MMC host test driver"
Pierre Ossman88ae6002007-08-12 14:23:50 +020062 help
63 Development driver that performs a series of reads and writes
64 to a memory card in order to expose certain well known bugs
65 in host controllers. The tests are executed by writing to the
Will Newton50cec372011-02-10 10:41:02 +000066 "test" file in debugfs under each card. Note that whatever is
Pierre Ossman88ae6002007-08-12 14:23:50 +020067 on your card will be overwritten by these tests.
68
69 This driver is only of interest to those developing or
70 testing a host driver. Most people should say N here.
Mark Salyzyn92f31302016-01-28 11:12:25 -080071
72config MMC_SIMULATE_MAX_SPEED
73 bool "Turn on maximum speed control per block device"
74 depends on MMC_BLOCK
75 help
76 Say Y here to enable MMC device speed limiting. Used to test and
77 simulate the behavior of the system when confronted with a slow MMC.
78
79 Enables max_read_speed, max_write_speed and cache_size attributes to
80 control the write or read maximum KB/second speed behaviors.
81
82 If unsure, say N here.