1# 2# MMC core configuration 3# 4config PWRSEQ_EMMC 5 tristate "HW reset support for eMMC" 6 default y 7 depends on OF 8 help 9 This selects Hardware reset support aka pwrseq-emmc for eMMC 10 devices. By default this option is set to y. 11 12 This driver can also be built as a module. If so, the module 13 will be called pwrseq_emmc. 14 15config PWRSEQ_SIMPLE 16 tristate "Simple HW reset support for MMC" 17 default y 18 depends on OF 19 help 20 This selects simple hardware reset support aka pwrseq-simple for MMC 21 devices. By default this option is set to y. 22 23 This driver can also be built as a module. If so, the module 24 will be called pwrseq_simple. 25 26config MMC_BLOCK 27 tristate "MMC block device driver" 28 depends on BLOCK 29 default y 30 help 31 Say Y here to enable the MMC block device driver support. 32 This provides a block device driver, which you can use to 33 mount the filesystem. Almost everyone wishing MMC support 34 should say Y or M here. 35 36config MMC_BLOCK_MINORS 37 int "Number of minors per block device" 38 depends on MMC_BLOCK 39 range 4 256 40 default 8 41 help 42 Number of minors per block device. One is needed for every 43 partition on the disk (plus one for the whole disk). 44 45 Number of total MMC minors available is 256, so your number 46 of supported block devices will be limited to 256 divided 47 by this number. 48 49 Default is 8 to be backwards compatible with previous 50 hardwired device numbering. 51 52 If unsure, say 8 here. 53 54config MMC_BLOCK_BOUNCE 55 bool "Use bounce buffer for simple hosts" 56 depends on MMC_BLOCK 57 default y 58 help 59 SD/MMC is a high latency protocol where it is crucial to 60 send large requests in order to get high performance. Many 61 controllers, however, are restricted to continuous memory 62 (i.e. they can't do scatter-gather), something the kernel 63 rarely can provide. 64 65 Say Y here to help these restricted hosts by bouncing 66 requests back and forth from a large buffer. You will get 67 a big performance gain at the cost of up to 64 KiB of 68 physical memory. 69 70 If unsure, say Y here. 71 72config SDIO_UART 73 tristate "SDIO UART/GPS class support" 74 depends on TTY 75 help 76 SDIO function driver for SDIO cards that implements the UART 77 class, as well as the GPS class which appears like a UART. 78 79config MMC_TEST 80 tristate "MMC host test driver" 81 help 82 Development driver that performs a series of reads and writes 83 to a memory card in order to expose certain well known bugs 84 in host controllers. The tests are executed by writing to the 85 "test" file in debugfs under each card. Note that whatever is 86 on your card will be overwritten by these tests. 87 88 This driver is only of interest to those developing or 89 testing a host driver. Most people should say N here. 90 91