Remove <linux/i2c/twl4030-rtc.h> by moving all the relevant contents
into the driver itself, and removing the rest.  Stuff removed included
many useless bitmasks, and remnants of the platform data hook.

Add markers inside the rtc driver to split sections apart:  first
data structure declarations, then the RTC driver, then platform bus
glue for it all.

There's still an issue with the twl4030-pwrirq.h registers ... this
driver has no business touching them!  This patch at least switches
away from having private versions of those register definitions, and
removes some unnecessary accesses to them.

No functional changes, just shrinkage.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Portability fixes (simplifications) for rtc-twl4030:  don't include
so many needless headers, especially platform-specific ones.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

make twl4030_usb transceiver reach musb.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

When a non-CORE DPLL is enabled via omap3_noncore_dpll_enable(), use
the user's desired rate in clk->rate to determine whether to put the
DPLL into bypass or lock mode, rather than reading the DPLL's current
idle state from its hardware registers.

This fixes a bug observed when leaving retention. Non-CORE DPLLs were
not being relocked when downstream clocks re-enabled; rather, the DPLL
entered bypass mode.

Problem reported by Tero Kristo <tero.kristo@nokia.com>.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Commit a63efb15 broke the dss1_alwon_fck
clock enable on 3430ES2+.  The clock code was not waiting for the module
to come out of idle.

Problem reported by Rajendra Nayak <rnayak@ti.com>.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

The <linux/i2c/...> directory has too many headers for twl4030
support.  Start simplifying that by moving twl430-gpio.h into
the main twl4030.h and also:

 - Providing comments to summarize the { module, offset } logical
   addressing vs the { i2c_client, register } physical addressing.

 - Moving the { module, offset } based I/O calls next to the place
   those modules are defined, with slightly improved descriptions.

 - Adding some section markers internal to twl4030.h so unrelated
   things can be visually separated.

 - Move TWL4030_GPIO_MAX adjacent to the other GPIO symbols.

 - Remove two more now-obsolete symbols (for GPIO pullup/pulldown).

 - Have global definitions of the three SIH_CTRL register bits,
   following the pattern of twl4030-core.c (and fixing a minor
   fault handling bug in reading the clear-on-read bit).

To keep things simple, the only blocks with register declarations
in this file should be ones with registers that (cleanly) get
shared between components ... modules with SIH registers (for
IRQ handling) being the obvious candidates.

No functional changes.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

Move twl4030-core to drivers/mfd from drivers/i2c/chips,
along with its Kconfig and Makefile help.

The intent here is:  no functional change, match the patch
sent to LKML this morning (except, fix that spelling error
in the new Kconfig text).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Merge branches 'master' and 'linus'

Conflicts:

	drivers/usb/musb/musb_core.c

Fix typo in omap_wdt.c introduced by a recent change
Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Signed-off-by: Tony Lindgren <tony@atomide.com>

SDMA channel is not disabled after transaction error. So explicitly disable it.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked By : Nishant kamat <nskamat@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Clean up the twl4030-gpio code a bit ... mostly by shrinkage.

Remove a bunch of macros that are just obfuscating what the
TWL4030 GPIO code is doing.  Some duplicated standard macros
like BIT(); others hid trivial math (mask/shift); others were
completely unused.

Use BIT() in several places to highlight the bitmasking and
make the code more compact.

Remove pointless locking calls, sanity checks, and parenthesis.
And needless irq_chip.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Better TWL init on Beagle:  use the setup() callback to
learn IRQ assignments; and configure pullups/pulldowns.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Finish moving initialization of pullups and pulldowns for twl4030
GPIOs into board specific init.  Remove partial/incorrect init code
for that from the hsmmc glue.

Doing this right requires some attention from board init logic,
based on how the TWL chip is wired.  Letting digital inputs float
will waste power.  Everyone with board schematics should update
their board init code so it matches their boards; meanwhile,
this returns to "current" behavior (all pullups disabled) but
finally offers a way to do it "right".

Note that the ULPI pins won't need this attention (muxed against
gpio{3-5,9-12,14} pins), and neither will ones with external
pullups or pulldowns (conventional for MMC/SD card detect).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

twl4030_bci_battery.c is now moved to new style
registration of twl4030 children.

During the process a few bugfixes came, the main one
is that twl4030-bci was releasing the wrong irq if
battery registration had failed.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Brainless fixes, checkpatch.pl fixes, variable naming,
etc.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Improve handling of the OMAP-specific setup in twl4030-core,
and remove various warnings on non-OMAP builds.

The main remaining portability problem for this core code (from
a build perspective) is needing symbols like TWL4030_PWR_IRQ_BASE
which are undesirable and platform-specific.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Remove some ARM and OMAP specific stuff from the twl4030 GPIO code,
and some unused/undesirable CPP symbols.  Add minor checkpatch fixes.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Make the hsmmc code use genirq interfaces to make sure the
card detect IRQ triggers on both edges.  Remove the older
TWL-specific infrastructure for making that happen.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Make twl4030 GPIO support set_type() request.
Plus a bit of cleanup for the simple functions.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Trivial brainless fixes, a few unused headers removed,
changed one printk to pr_err() and removed one comment.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

This avoids oopsing in statically linked systems when some
subsystems register I2C drivers in subsys_initcall() code,
but those subsystems are linked (and initialized) before I2C.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

use platform_get_irq() for getting irq number passed
to twl4030-usb via twl4030-core.c:add_children()
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Minor IRQ-related cleanups:  comment out the no-longer-used
GPIO irq symbol (more to come, eventually); create RTC IRQ
resource; and use that RTC IRQ resource.

And incidentally, make the RTC code free the correct IRQ;
it was pretty goofed up...
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Previously we were failing platform_device_add_data()
and returning from add_children but trying to keep going
when platform_device_add() fails.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Move the twl4030 GPIO support from drivers/i2c/chips to drivers/gpio,
which is a more appropriate home for this code.

The Kconfig symbol name is changed to match the GPIO_* convention for
such symbols, so config files must change in the obvious ways (Kconfig
will prompt you).  There's now some helptext.

It can now be compiled as a module, should anyone really want to
do that; that'll be mostly useful for test builds.  Sanity check the
IRQ range we're given.

Initialization order needed a bit of work too:  core add_children()
called only after IRQs get set up, gpio uses subsys_initcall.  This
depends on a patch making i2c driver model init use postcore_initcall.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Provide detailed diagnostics in add_children() when DEBUG is
defined ... and fix the non-DEBUG message to include minimal
status, and not appear unless there was actually an error.

Update the IRQ message; have it match what the GPIO subchip
says, and as a precaution, make it only appear if the IRQs
have been initialized.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

Added a few more diagnostics when platform_device_add() fails.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Minor twl4030-core cleanups:  alphabetize the creation of the
new sub-function nodes; wrap an #if around the OMAP-only part
(to get more general build testing when this goes upstream);
remove reference to undocumented "twl3040" variant.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

Moved gpio before keypad driver due to alphabetic order.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Moving twl4030-madc to new style registration just like
the other twl4030 children.

Cc: Mikko Ylinen <mikko.k.ylinen@nokia.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Make the twl4030 core create a platform device to which its
GPIO code will bind, with platform_data used to configure
board-specific behaviors and configuration.

Update the twl4030 GPIO code:

  - Morph its gpio function code into a platform driver.

  - Move away from IRQ (and GPIO) numbers hard-wired in headers.

  - Hook up the twl4030 GPIO code to gpiolib.

  - Start phasing out the older TWL-specific calls ... currently
    those are used only by arch/arm/mach-omap2/hsmmc.c setup code.

  - Use a mutex for locking, not a binary semaphore.

NOTE:  more patches pending:  (a) this doesn't use pdata->pullups
to initialize (currently hsmmc code always sets GPIO-0 pullup even
if the board has an external pullup);  (b) there's a new gpio
request/free hook forthcoming in 2.6.28, which this should use;
(c) likewise there's a new gpio_to_irq() hook; (d) the irq_chip
set_type() mechanism needs to be supported; (e) needs to move over
to drivers/gpio; (f) upcoming threaded IRQ infrastructure should
be used, when that merges.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Define platform data for configuring TWL4030 GPIOs,
and provide it for all boards using these chips.

For now all boards use the same fixed assignments for
GPIO and IRQ numbers.  Eventually we should be able
to shuffle them without changing platform headers.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

vbus sysfs file will report the state of vbus irq coming from
twl4030-usb.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

use new style twl4030-core to register a platform_device
for twl4030-usb.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

let twl4030-core.c take care of twl4030_keypad registration.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Clean up add_children a bit before adding more children
to twl4030-core.c
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

One twl4030_request_gpio() should not tamper with the pullup
enabling/disabling of the rest of the GPIOs. So removing the default
pullup values written to REG_GPIOPUPDCTR1.
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Girish S G <girishsg@ti.com>
Signed-off-by: Jagadeesh Bhaskar Pakaravoor <j-pakaravoor@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

The following patch fix a potential null pointer
dereference in twl4030 keypad driver when parts
of keypad platform_data aren't passed down to the
driver. At that point kp->dbg_dev is not set yet.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Big MMC init clean up:

- Remove enabled field from slots. It is really intended to mean enabled controller,
  not enabled slot. Some controllers can have multiple multiplexed slots connected
  to the first controller, such as H4 and N8X0.

- Initialize MMC devices dynamically as suggested by Russell King

- Fix omap1 and omap2 mmc clock instance numbers

- Also attempt to fix massive omap1 MMC breakage caused by patch
  138ab9f8. Remove obviously broken
  MMC configurations for now. MMC is still not working for any
  omap1 boards.
Signed-off-by: Tony Lindgren <tony@atomide.com>

There's a race between mm->owner assignment and swapoff, more easily
seen when task slab poisoning is turned on.  The condition occurs when
try_to_unuse() runs in parallel with an exiting task.  A similar race
can occur with callers of get_task_mm(), such as /proc/<pid>/<mmstats>
or ptrace or page migration.

CPU0                                    CPU1
                                        try_to_unuse
                                        looks at mm = task0->mm
                                        increments mm->mm_users
task 0 exits
mm->owner needs to be updated, but no
new owner is found (mm_users > 1, but
no other task has task->mm = task0->mm)
mm_update_next_owner() leaves
                                        mmput(mm) decrements mm->mm_users
task0 freed
                                        dereferencing mm->owner fails

The fix is to notify the subsystem via mm_owner_changed callback(),
if no new owner is found, by specifying the new task as NULL.

Jiri Slaby:
mm->owner was set to NULL prior to calling cgroup_mm_owner_callbacks(), but
must be set after that, so as not to pass NULL as old owner causing oops.

Daisuke Nishimura:
mm_update_next_owner() may set mm->owner to NULL, but mem_cgroup_from_task()
and its callers need to take account of this situation to avoid oops.

Hugh Dickins:
Lockdep warning and hang below exec_mmap() when testing these patches.
exit_mm() up_reads mmap_sem before calling mm_update_next_owner(),
so exec_mmap() now needs to do the same.  And with that repositioning,
there's now no point in mm_need_new_owner() allowing for NULL mm.
Reported-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>