linux-stable.git/drivers/mmc/core, branch v3.3.1

mmc: core: Fixup suspend/resume issues for UHS-I cards

2012-03-04T17:25:15+00:00

Even if cards supports 1.8V I/O voltage those should anyway be
initialized at 3.3V I/O according to (e)MMC, SD and SDIO specs.
Some eMMC and embedded SDIO devices are able to be initialized
at 1.8V as well, but it is better to be safe.

Do note that initialization in this context means that the card
has been completely powered off, otherwise the card will remain
at the last I/O voltage level that were negotitiated.

Due to the above being taken care of the suspend/resume issues
for UHS-I SD-cards has been fixed.

Signed-off-by: Ulf Hansson 
Acked-by: Philip Rakity 
Acked-by: Linus Walleij 
Tested-by: Subhash Jadavani 
Signed-off-by: Chris Ball

mmc: core: fix regression: set default clock gating delay to 0

2012-03-04T17:18:40+00:00

A recent commit "mmc: core: Use delayed work in clock gating framework"
(597dd9d79cfbbb1) introduced a default 200ms delay before clock gating
actually takes place.  This means that every time an MMC interface
becomes idle it first stays on for 200ms before gating its clock. This
leads to increased power consumption and is therefore a clear regression.
This patch restores the original behaviour by setting the default delay
to 0. Users prioritising throughput over power efficiency can still
modify the delay via sysfs.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Chris Ball

mmc: core: Fix comparison issue in mmc_compare_ext_csds

2012-02-14T01:39:02+00:00

Found this issue during code review. Actually, there are two issues which
both compensate together in lucky case.  In unlucky case the bus width
probing might not work as expected.

Signed-off-by: Jurgen Heeks 
Reviewed-by: Namjae Jeon 
Signed-off-by: Chris Ball

mmc: core: Fix PowerOff Notify suspend/resume

2012-02-14T01:39:02+00:00

Modified the mmc_poweroff to resume before sending the poweroff
notification command. In sleep mode only AWAKE and RESET commands are
allowed, so before sending the poweroff notification command resume from
sleep mode and then send the notification command.

PowerOff Notify is tested on a Synopsis Designware Host Controller
(eMMC 4.5). The suspend to RAM and resume works fine.

Signed-off-by: Girish K S 
Tested-by: Girish K S 
Reviewed-by: Saugata Das 
Signed-off-by: Chris Ball

mmc: core: add the capability for broken voltage

2012-02-14T01:39:01+00:00

There is an understood mismatch between the voltage the host controller is
set to and the voltage supplied to the card by a fixed voltage regulator.
Teaching the driver to accept the mismatch is overly complicated.  Instead
just accept the regulator's voltage.

This patch adds MMC_CAP2_BROKEN_VOLTAGE.

If the voltage didn't satisfy between min_uV and max_uV, try to change
the voltage in core.c.  When changing the voltage, maybe use
regulator_set_voltage().

In regulator_set_voltage(), check the below condition.

	/* sanity check */
	if (!rdev->desc->ops->set_voltage &&
	    !rdev->desc->ops->set_voltage_sel) {
		ret = -EINVAL;
		goto out;
	}

If some board should use the fixed-regulator, always return -EINVAL.
Then, eMMC didn't initialize always.

So if use a fixed-regulator, we need to add the MMC_CAP2_BROKEN_VOLTAGE.

Signed-off-by: Jaehoon Chung 
Signed-off-by: Kyungmin Park 
Acked-by: Adrian Hunter 
Signed-off-by: Chris Ball

mmc: core: Fix low speed mmc card detection failure

2012-02-14T01:39:00+00:00

This patch fixes the failure of low speed mmc card detection.

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

mmc: core: Ensure clocks are always enabled before host interaction

2012-02-14T01:38:58+00:00

Ensure clocks are always enabled before any interaction with the
host controller driver. This makes sure that there is no race
between host execution and the core layer turning off clocks
in different context with clock gating framework.

Signed-off-by: Sujit Reddy Thumma 
Acked-by: Linus Walleij 
Acked-by: Per Forlin 
Signed-off-by: Chris Ball

mmc: core: UHS sdio card that fails should not exceed 50MHz

2012-02-14T01:38:28+00:00

A UHS sdio card that fails initialization at 1.8v signaling is not in
UHS mode.  We cannot use the speed in the the cis to reflect the bus
speed as this is the maxiumum value and will not reflect the fact
that the host is operating at a lower (non uhs) bus speed.

Signed-off-by: Philip Rakity 
Signed-off-by: Bing Zhao 
Reviewed-by: Aaron Lu 
Signed-off-by: Chris Ball

Merge tag 'for-linus' of git://github.com/rustyrussell/linux

2012-01-14T20:32:16+00:00

Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999  BFCB D920 0E6C D1AD B8F1

* tag 'for-linus' of git://github.com/rustyrussell/linux:
  module_param: check that bool parameters really are bool.
  intelfbdrv.c: bailearly is an int module_param
  paride/pcd: fix bool verbose module parameter.
  module_param: make bool parameters really bool (drivers & misc)
  module_param: make bool parameters really bool (arch)
  module_param: make bool parameters really bool (core code)
  kernel/async: remove redundant declaration.
  printk: fix unnecessary module_param_name.
  lirc_parallel: fix module parameter description.
  module_param: avoid bool abuse, add bint for special cases.
  module_param: check type correctness for module_param_array
  modpost: use linker section to generate table.
  modpost: use a table rather than a giant if/else statement.
  modules: sysfs - export: taint, coresize, initsize
  kernel/params: replace DEBUGP with pr_debug
  module: replace DEBUGP with pr_debug
  module: struct module_ref should contains long fields
  module: Fix performance regression on modules with large symbol tables
  module: Add comments describing how the "strmap" logic works

Fix up conflicts in scripts/mod/file2alias.c due to the new linker-
generated table approach to adding __mod_*_device_table entries.  The
ARM sa11x0 mcp bus needed to be converted to that too.

module_param: make bool parameters really bool (drivers & misc)

2012-01-12T23:02:20+00:00

module_param(bool) used to counter-intuitively take an int.  In
fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
trick.

It's time to remove the int/unsigned int option.  For this version
it'll simply give a warning, but it'll break next kernel version.

Acked-by: Mauro Carvalho Chehab 
Signed-off-by: Rusty Russell