# # MMC core configuration # config PWRSEQ_EMMC tristate "HW reset support for eMMC" default y depends on OF help This selects Hardware reset support aka pwrseq-emmc for eMMC devices. By default this option is set to y. This driver can also be built as a module. If so, the module will be called pwrseq_emmc. config PWRSEQ_SD8787 tristate "HW reset support for SD8787 BT + Wifi module" depends on OF && (MWIFIEX || BT_MRVL_SDIO) help This selects hardware reset support for the SD8787 BT + Wifi module. By default this option is set to n. This driver can also be built as a module. If so, the module will be called pwrseq_sd8787. config PWRSEQ_SIMPLE tristate "Simple HW reset support for MMC" default y depends on OF help This selects simple hardware reset support aka pwrseq-simple for MMC devices. By default this option is set to y. This driver can also be built as a module. If so, the module will be called pwrseq_simple. config MMC_BLOCK tristate "MMC block device driver" depends on BLOCK default y help Say Y here to enable the MMC block device driver support. This provides a block device driver, which you can use to mount the filesystem. Almost everyone wishing MMC support should say Y or M here. config MMC_BLOCK_MINORS int "Number of minors per block device" depends on MMC_BLOCK range 4 256 default 8 help Number of minors per block device. One is needed for every partition on the disk (plus one for the whole disk). Number of total MMC minors available is 256, so your number of supported block devices will be limited to 256 divided by this number. Default is 8 to be backwards compatible with previous hardwired device numbering. If unsure, say 8 here. config MMC_BLOCK_DEFERRED_RESUME bool "Defer MMC layer resume until I/O is requested" depends on MMC_BLOCK default n help Say Y here to enable deferred MMC resume until I/O is requested. This will reduce overall resume latency and save power when there is an SD card inserted but not being used. config SDIO_UART tristate "SDIO UART/GPS class support" depends on TTY help SDIO function driver for SDIO cards that implements the UART class, as well as the GPS class which appears like a UART. config MMC_TEST tristate "MMC host test driver" help Development driver that performs a series of reads and writes to a memory card in order to expose certain well known bugs in host controllers. The tests are executed by writing to the "test" file in debugfs under each card. Note that whatever is on your card will be overwritten by these tests. This driver is only of interest to those developing or testing a host driver. Most people should say N here. config MMC_RING_BUFFER bool "MMC_RING_BUFFER" depends on MMC default n help This enables the ring buffer tracing of significant events for mmc driver to provide command history for debugging purpose. If unsure, say N. config MMC_EMBEDDED_SDIO boolean "MMC embedded SDIO device support" help If you say Y here, support will be added for embedded SDIO devices which do not contain the necessary enumeration support in hardware to be properly detected. config MMC_PARANOID_SD_INIT bool "Enable paranoid SD card initialization" help If you say Y here, the MMC layer will be extra paranoid about re-trying SD init requests. This can be a useful work-around for buggy controllers and hardware. Enable if you are experiencing issues with SD detection. config MMC_CLKGATE bool "MMC host clock gating" help This will attempt to aggressively gate the clock to the MMC card. This is done to save power due to gating off the logic and bus noise when the MMC card is not in use. Your host driver has to support handling this in order for it to be of any use. If unsure, say N. config MMC_SIMULATE_MAX_SPEED bool "Turn on maximum speed control per block device" depends on MMC_BLOCK help Say Y here to enable MMC device speed limiting. Used to test and simulate the behavior of the system when confronted with a slow MMC. Enables max_read_speed, max_write_speed and cache_size attributes to control the write or read maximum KB/second speed behaviors. If unsure, say N here. config MMC_CRYPTO bool "MMC Crypto Engine Support" depends on BLK_INLINE_ENCRYPTION help Enable Crypto Engine Support in MMC. Enabling this makes it possible for the kernel to use the crypto capabilities of the MMC device (if present) to perform crypto operations on data being transferred to/from the device.