linux-stable.git/drivers/mmc/core/debugfs.c, branch linux-3.8.y

mmc: core: debugfs: Add signal_voltage to ios dump

2012-12-06T18:54:36+00:00

Signed-off-by: Johan Rudholm 
Reviewed-by: Philip Rakity 
Signed-off-by: Chris Ball

mmc: debugfs: Print ext_csd in ascending order

2012-09-04T17:58:21+00:00

ext_csd exported through debugfs is printed in reverse order (from
byte 511 to 0), which causes confusion.
Fix the for loop to print ext_csd in natural order.

Signed-off-by: Venkatraman S 
Acked-by: Felipe Balbi 
Signed-off-by: Chris Ball

mmc: core: HS200 mode support for eMMC 4.5

2012-01-12T20:17:15+00:00

This patch adds the support of the HS200 bus speed for eMMC 4.5 devices.
The eMMC 4.5 devices have support for 200MHz bus speed. The function
prototype of the tuning function is modified to handle the tuning
command number which is different in sd and mmc case.

Signed-off-by: Girish K S 
Signed-off-by: Philip Rakity 
Signed-off-by: Chris Ball

mmc: debugfs: expose the SDCLK frq in sys ios

2012-01-12T04:58:40+00:00

This patch is to expose the actual SDCLK frequency in
/sys/kernel/debug/mmcX/ios entry.

For example, if the max clk for a normal speed card is 20MHz this
is reported in /sys/kernel/debug/mmcX/ios.  Unfortunately the actual
SDCLK frequency (i.e. Baseclock / divisor) is not reported at all:
for example, in that case, on Arasan HC, it should be 48/4=12 (MHz).

Signed-off-by: Giuseppe Cavallaro 
Acked-by: Adrian Hunter 
Signed-off-by: Chris Ball

mmc: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required

2011-10-31T23:32:06+00:00

These two basic defines were everywhere, simply because module.h
was also everywhere.   But we are cleaning up the latter.  So make
the exporters actually call out their need for the include.

Signed-off-by: Paul Gortmaker

mmc: using module_param requires the inclusion of moduleparam.h

2011-10-26T20:32:18+00:00

Commit "mmc: add module param to set fault injection attributes" adds
a module_param to this file.  But it is relying on the old implicit
"module.h is everywhere" behaviour, and without the explicit include
of moduleparam.h, the pending module.h split up produces this error:

core/debugfs.c:28:35: error: expected ')' before numeric constant

Signed-off-by: Stephen Rothwell 
Signed-off-by: Paul Gortmaker 
Signed-off-by: Chris Ball

mmc: add module param to set fault injection attributes

2011-10-26T20:32:12+00:00

Replace setup("fail_mmc_request") and faulty "ifdef KERNEL" with
a simple module_param(). The module param mmc_core.fail_request
may be used to set the fault injection attributes during boot time
or module load time.

Signed-off-by: Per Forlin 
Reviewed-by: Akinobu Mita 
Signed-off-by: Chris Ball

mmc: core: add sd uhs string for mmc_ios_show

2011-10-26T20:32:10+00:00

This is a minor fix. It makes mmc_ios_show print proper string when the
host's timing is one of the newly added UHS-I modes.

Signed-off-by: Aaron Lu 
Signed-off-by: Chris Ball

mmc: core: add random fault injection

2011-10-26T19:43:34+00:00

This adds support to inject data errors after a completed host transfer.
The mmc core will return error even though the host transfer is successful.
This simple fault injection proved to be very useful to test the
non-blocking error handling in the mmc_blk_issue_rw_rq().
Random faults can also test how the host driver handles pre_req()
and post_req() in case of errors.

Signed-off-by: Per Forlin 
Acked-by: Akinobu Mita 
Reviewed-by: Linus Walleij 
Signed-off-by: Chris Ball

mmc: Aggressive clock gating framework

2011-01-09T03:48:03+00:00

This patch modifies the MMC core code to optionally call the set_ios()
operation on the driver with the clock frequency set to 0 (gate) after
a grace period of at least 8 MCLK cycles, then restore it (ungate)
before any new request. This gives the driver the option to shut down
the MCI clock to the MMC/SD card when the clock frequency is 0, i.e.
the core has stated that the MCI clock does not need to be generated.

It is inspired by existing clock gating code found in the OMAP and
Atmel drivers and brings this up to the host abstraction.  Gating is
performed before and after any MMC request.

This patchset implements this for the MMCI/PL180 MMC/SD host controller,
but it should be simple to switch OMAP/Atmel over to using this instead.

mmc_set_{gated,ungated}() add variable protection to the state holders
for the clock gating code.  This is particularly important when ordinary
.set_ios() calls would race with the .set_ios() call resulting from a
delayed gate operation.

Signed-off-by: Linus Walleij 
Reviewed-by: Chris Ball 
Tested-by: Chris Ball 
Signed-off-by: Chris Ball