linux-stable.git/drivers/mmc/core/debugfs.c, branch linux-3.19.y

mmc: core: Use mmc_get_ext_csd() instead of mmc_send_ext_csd()

2014-11-10T11:40:44+00:00

By using mmc_get_ext_csd() in favor of mmc_send_ext_csd, we decrease
code duplication.

Signed-off-by: Ulf Hansson

mmc: add support for HS400 mode of eMMC5.0

2014-05-12T22:06:06+00:00

This patch adds HS400 mode support for eMMC5.0 device.  HS400 mode is high
speed DDR interface timing from HS200.  Clock frequency is up to 200MHz
and only 8-bit bus width is supported. In addition, tuning process of
HS200 is required to synchronize the command response on the CMD line
because CMD input timing for HS400 mode is the same as HS200 mode.

Signed-off-by: Seungwon Jeon 
Reviewed-by: Jackey Shen 
Tested-by: Jaehoon Chung 
Acked-by: Jaehoon Chung 
Signed-off-by: Ulf Hansson 
Signed-off-by: Chris Ball

mmc: rework selection of bus speed mode

2014-05-12T22:06:04+00:00

Current implementation for bus speed mode selection is too
complicated. This patch is to simplify the codes and remove
some duplicate parts.

The following changes are including:
* Adds functions for each mode selection(HS, HS-DDR, HS200 and etc)
* Rearranged the mode selection sequence with supported device type
* Adds maximum speed for HS200 mode(hs200_max_dtr)
* Adds field definition for HS_TIMING of EXT_CSD

Signed-off-by: Seungwon Jeon 
Tested-by: Jaehoon Chung 
Acked-by: Jaehoon Chung 
Signed-off-by: Ulf Hansson 
Signed-off-by: Chris Ball

mmc: clarify DDR timing mode between SD-UHS and eMMC

2014-04-20T20:59:28+00:00

This change distinguishes DDR timing mode of current
mixed usage to clarify device type.

Signed-off-by: Seungwon Jeon 
Acked-by: Jaehoon Chung 
Signed-off-by: Ulf Hansson 
Signed-off-by: Chris Ball

mmc: block: Enable runtime pm for mmc blkdevice

2013-05-26T18:23:16+00:00

Once the mmc blkdevice is being probed, runtime pm will be enabled.
By using runtime autosuspend, the power save operations can be done
when request inactivity occurs for a certain time. Right now the
selected timeout value is set to 3 s. Obviously this value will likely
need to be configurable somehow since it needs to be trimmed depending
on the power save algorithm.

For SD-combo cards, we are still leaving the enablement of runtime PM
to the SDIO init sequence since it depends on the capabilities of the
SDIO func driver.

Moreover, when the blk device is being suspended, we make sure the device
will be runtime resumed. The reason for doing this is that we want the
host suspend sequence to be unaware of any runtime power save operations
done for the card in this phase. Thus it can just handle the suspend as
the card is fully powered from a runtime perspective.

Finally, this patch prepares to make it possible to move BKOPS handling
into the runtime callbacks for the mmc bus_ops. Thus IDLE BKOPS can be
accomplished.

Signed-off-by: Ulf Hansson 
Signed-off-by: Chris Ball

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