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gerrit-public.fairphone.software / kernel / msm / 275aeb74516b1faf5d1e8fd7ff0fe1511464a29c / . / drivers / mmc / card / Kconfig
blob: 33f06006ce709fbdd184d6275cbe69c0736c5a3b [file] [log] [blame]
Pierre Ossman1c6a0712007-02-11 19:57:36 +0100[diff] [blame]1#
2# MMC/SD card drivers
3#
4
Pierre Ossman57105732008-09-07 13:16:58 +0200[diff] [blame]5comment "MMC/SD/SDIO Card Drivers"
Pierre Ossman1c6a0712007-02-11 19:57:36 +0100[diff] [blame]6
7config MMC_BLOCK
8 tristate "MMC block device driver"
Jan Engelhardt790864d2007-05-08 22:30:32 +0200[diff] [blame]9 depends on BLOCK
Pierre Ossman1c6a0712007-02-11 19:57:36 +0100[diff] [blame]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
Olof Johansson5e71b7a2010-09-17 21:19:57 -0400[diff] [blame]17config MMC_BLOCK_MINORS
18 int "Number of minors per block device"
Chris Ballb37427b2011-01-04 12:39:20 -0500[diff] [blame]19 depends on MMC_BLOCK
Olof Johansson5e71b7a2010-09-17 21:19:57 -0400[diff] [blame]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
Pierre Ossman98ccf142007-05-12 00:26:16 +0200[diff] [blame]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
San Mehat148c57a2009-07-30 08:21:19 -0700[diff] [blame]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
Nicolas Pitre6e418a92007-06-30 02:04:21 -0400[diff] [blame]62config SDIO_UART
63 tristate "SDIO UART/GPS class support"
Nicolas Pitre6e418a92007-06-30 02:04:21 -0400[diff] [blame]64 help
65 SDIO function driver for SDIO cards that implements the UART
66 class, as well as the GPS class which appears like a UART.
67
Pierre Ossman88ae6002007-08-12 14:23:50 +0200[diff] [blame]68config MMC_TEST
69 tristate "MMC host test driver"
Pierre Ossman88ae6002007-08-12 14:23:50 +0200[diff] [blame]70 help
71 Development driver that performs a series of reads and writes
72 to a memory card in order to expose certain well known bugs
73 in host controllers. The tests are executed by writing to the
Will Newton50cec372011-02-10 10:41:02 +0000[diff] [blame]74 "test" file in debugfs under each card. Note that whatever is
Pierre Ossman88ae6002007-08-12 14:23:50 +0200[diff] [blame]75 on your card will be overwritten by these tests.
76
77 This driver is only of interest to those developing or
78 testing a host driver. Most people should say N here.
Tatyana Brokhman09b010d2012-10-09 13:50:56 +0200[diff] [blame]79
80config MMC_BLOCK_TEST
81 tristate "MMC block test"
82 depends on MMC_BLOCK && IOSCHED_TEST
83 help
84 MMC block test can be used with test iosched to test the MMC block
85 device.
86 Currently used to test eMMC 4.5 features (packed commands, sanitize,
87 BKOPs).
88