kernel/linux.git/include/linux/mmc/host.h, branch v2.6.30

MMC: regulator utilities

2009-03-31T08:56:26+00:00

Glue between MMC and regulator stacks ... verified with some OMAP3 boards using adjustable and configured-as-fixed regulators on several MMC controllers. These calls are intended to be used by MMC host adapters using at least one regulator per host. Examples include slots with regulators supporting multiple voltages and ones using multiple voltage rails (e.g. DAT4..DAT7 using a separate supply, or a split rail chip like certain SDIO WLAN or eMMC solutions). Signed-off-by: David Brownell Acked-by: Pierre Ossman Signed-off-by: Liam Girdwood

mmc: Add 8-bit bus width support

2008-12-31T17:18:12+00:00

Signed-off-by: Jarkko Lavinen Signed-off-by: Pierre Ossman

mmc: struct device - replace bus_id with dev_name(), dev_set_name()

2008-11-08T20:37:46+00:00

Acked-by: Greg Kroah-Hartman Signed-Off-By: Kay Sievers Signed-off-by: Pierre Ossman

Fix comment in include/linux/mmc/host.h

2008-10-12T09:04:34+00:00

In include/linux/mmc/host.h, it is mentionned that the callback to know if a card is present or not is get_ro(). But it's get_cd(). Signed-off-by: Thomas Petazzoni Signed-off-by: Pierre Ossman

mmc: Export internal host state through debugfs

2008-07-26T23:26:16+00:00

When CONFIG_DEBUG_FS is set, create a few files under /sys/kernel/debug containing information about an mmc host's internal state. Currently, just a single file is created, "ios", which contains information about the current operating parameters for the bus (clock speed, bus width, etc.) Host drivers can add additional files and directories under the host's root directory by passing the debugfs_root field in struct mmc_host as the 'parent' parameter to debugfs_create_*. Signed-off-by: Haavard Skinnemoen Signed-off-by: Pierre Ossman

mmc: remove multiwrite capability

2008-07-15T12:14:49+00:00

Relax requirements on host controllers and only require that they do not report a transfer count than is larger than the actual one (i.e. a lower value is okay). This is how many other parts of the kernel behaves so upper layers should already be prepared to handle that scenario. This gives us a performance boost on MMC cards. Signed-off-by: Pierre Ossman

mmc: change .get_ro() callback semantics

2008-07-15T12:14:41+00:00

Now get_ro() callback must return 0/1 values for its logical states, and negative errno values in case of error. If particular host instance doesn't support RO/WP switch, it should return -ENOSYS. This patch changes some hosts in two ways: 1. Now functions should be smart to not return negative values in "RO asserted" case (particularly gpio_ calls could return negative values for the outermost GPIOs). Also, board code usually passes get_ro() callbacks that directly return gpioreg & bit result, so at91_mci, imxmmc, pxamci and mmc_spi's get_ro() handlers need take special care when returning platform's values to the mmc core. 2. In case of host instance didn't implement get_ro() callback, it should really return -ENOSYS and let the mmc core decide what to do about it (mmc core thinks the same way as the hosts, so it isn't functional change). Signed-off-by: Anton Vorontsov Signed-off-by: Pierre Ossman

mmc: add support for card-detection polling

2008-07-15T12:14:41+00:00

Some hosts (and boards that use mmc_spi) do not use interrupts on the CD line, so they can't trigger mmc_detect_change. We want to poll the card and see if there was a change. 1 second poll interval seems resonable. This patch also implements .get_cd() host operation, that could be used by the hosts that are able to report card-detect status without need to talk MMC. Signed-off-by: Anton Vorontsov Signed-off-by: Pierre Ossman

mmc: remove unused 'mode' from the mmc_host structure

2007-12-12T19:01:01+00:00

This field and corresponding defines are simply never used anywhere in the code. But its mere presence is enough to confuse some host driver authors who attempt to rely on it. Let's eliminate the possibility for confusion and remove it entirely. Signed-off-by: Nicolas Pitre Signed-off-by: Pierre Ossman

mmc: add led trigger

2007-09-24T05:15:48+00:00

Add a led trigger for each host controller that indicates if there is a request active on the controller. Signed-off-by: Pierre Ossman