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linux-stable/drivers/mmc/core
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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 2010-10-23 21:11:17 +08:00
debugfs.c mmc: add a file to debugfs for changing host clock at runtime 2010-10-23 21:11:20 +08:00
host.c mmc: Remove distinction between hw and phys segments 2010-10-23 21:11:11 +08:00
host.h mmc: add 'enable' and 'disable' methods to mmc host 2009-09-23 07:39:33 -07:00
Kconfig mmc: add module parameter to set whether cards are assumed removable 2009-12-15 08:53:35 -08:00
Makefile mmc: Makefile: Fix EXTRA_CFLAGS assignment 2010-10-23 21:11:15 +08:00
mmc.c mmc: propagate power save/restore ops return value 2010-10-23 21:11:17 +08:00
mmc_ops.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mmc_ops.h mmc: add mmc card sleep and awake support 2009-09-23 07:39:33 -07:00
sd.c mmc: propagate power save/restore ops return value 2010-10-23 21:11:17 +08:00
sd.h mmc: split mmc_sd_init_card() 2010-08-11 08:59:02 -07:00
sd_ops.c mmc: add erase, secure erase, trim and secure trim operations 2010-08-12 08:43:30 -07:00
sd_ops.h mmc: add erase, secure erase, trim and secure trim operations 2010-08-12 08:43:30 -07:00
sdio.c mmc: sdio: ensure mmc_sdio_detect is powered 2010-10-23 21:11:18 +08:00
sdio_bus.c mmc: sdio: support suspend/resume while runtime suspended 2010-10-23 21:11:19 +08:00
sdio_bus.h
sdio_cis.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sdio_cis.h
sdio_io.c sdio: add new function for RAW (Read after Write) operation 2010-05-27 09:12:40 -07:00
sdio_irq.c
sdio_ops.c sdio: recognize io card without powercycle 2010-03-12 15:52:28 -08:00
sdio_ops.h sdio: recognize io card without powercycle 2010-03-12 15:52:28 -08:00