linux

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Files

Andy Shevchenko 703aae3d09 mmc: add a file to debugfs for changing host clock at runtime

For debugging power management features it is convenient to have the
possibility of changing the MMC host controller clock at runtime.  This
patch adds a 'clock' file for this under the MMC host root of debugfs.

Usage is as follows:

	# cat /sys/kernel/debug/mmc0/clock
	52000000

	# echo "1000000000" > /sys/kernel/debug/mmc0/clock
	# cat /sys/kernel/debug/mmc0/clock
	52000000

	# echo "48000000" > /sys/kernel/debug/mmc0/clock
	# cat /sys/kernel/debug/mmc0/clock
	48000000

The middle example shows limits being applied by the host driver.

Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
[cjb: modify changelog language]
Signed-off-by: Chris Ball <cjb@laptop.org>

2010-10-23 21:11:20 +08:00

bus.c

mmc: add runtime PM handlers

2010-10-23 21:11:18 +08:00

bus.h

mmc: rename dev_to_mmc_card() to mmc_dev_to_card()

2010-10-23 21:11:12 +08:00

core.c

mmc: propagate power save/restore ops return value

2010-10-23 21:11:17 +08:00

core.h

mmc: propagate power save/restore ops return value