Adding ads7846 touchscreen support to omap2evm board
Signed-off-by: Arun KS <arunks@mistralsolutions.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

This patch adds mcspi1 and gpio_85 mux configuration for 2430.
Signed-off-by: Arun KS <arunks@mistralsolutions.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

As sugested by RMK
Signed-off-by: Arun C <arunedarath@mistralsolutions.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Various cleanups to the OMAP EHCI bus glue:

 - Whitespace fixes.

 - Busy-wait loops should really have timeouts, but lacking
   that ... at least cpu_relax() in the body.

 - Debug messages should end with newlines, so they don't
   break the next message; should not embed newlines; and
   should otherwise be clean and correctly spelled.

 - The probe() method should have initialized the SBRN value,
   so the driver didn't report "USB 0.0 started".

 - The MODULE_ALIAS() was missing its "platform:" prefix;
   doing it right means the module could hotplug/coldplug.

No real functional change except for the hotplug/coldplug thing.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

This prevents spurious interrupts from repeating unacked and
thus locking the system, while still allowing the spurious
bad irq error message to be show on console.
Signed-off-by: Lauri Leukkunen <lauri.leukkunen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

This is until the EHCI issues have been sorted out.
Signed-off-by: Tony Lindgren <tony@atomid.com>

Update defconfigs for boards that have EHCI set
Signed-off-by: Tony Lindgren <tony@atomide.com>

debugfs_create_*() returns NULL if an error occurs, returns -ENODEV
when debugfs is not enabled in the kernel.

Comparing to PATCH v1, because clk_debugfs_init is included in
"#if defined CONFIG_DEBUG_FS", we only need to check NULL return.
Thanks Li Zefan <lizf@cn.fujitsu.com>

debugfs_create_u8() and other function's return value's checking method are
also fixed in this patch.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

On Wed, Oct 8, 2008 at 11:36 AM, Nathan Monson <nmonson@gmail.com> wrote:
> "Felipe Contreras" <felipe.contreras@gmail.com> writes:
>> irq -33, desc: c0335cf8, depth: 0, count: 0, unhandled: 0
>
> On the BeagleBoard list, Pratheesh Gangadhar said that mapping I/O
> regions as Strongly Ordered suppresses this problem:
> http://groups.google.com/group/beagleboard/browse_thread/thread/23e1c95b4bfb09b5/70d12dca569ca503?show_docid=70d12dca569ca503

Pratheesh helped me make a patch against the latest linux-omap git to
try this.

With this patch, my IRQ -33 problems with the DSP have disappeared.
Before, I would end up in IRQ -33 loop after 10 invocations of the DSP
Bridge 'ping.out' utility.  I just finished running it 50,000 times
without error.

As stated before, this patch is just a workaround for testing
purposes, not a fix.  Who knows what performance side effects it
has...
Signed-off-by: Nathan Monson <nmonson@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

The i2c_driver in twl4030-core.c and platform_driver of twl4030-usb.c
both has the name twl4030_driver. This leads to unnecessary confusion.

So rename the usb platform_driver appropriately to:
twl4030_usb_driver.
Signed-off-by: Jagadeesh Bhaskar Pakaravoor <j-pakaravoor@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Replace stubbed-out card-detect support for twl4030 GPIOs with
a simpler platform_data mechanism.  As before, no current users.
Sanity tested by enabling this on Beagle; it booted OK with
root on MMC.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Export Beagle's third LED to the LED framework, now that it's
accessible through the twl4030-gpio code.

Claim the VBUS control, defaulting to OFF.  Boards that have an
EHCI connector (not rev B) will need to update this slightly.
(Ideally as part of adding hooks to the ehci-map code supporting
external power switching and overcurrent detection.)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Expose the two TWL4030 LED signals as output-only GPIOs.  Boards
need to explicitly ask that this be done, to help avoid conflicts
on boards using these same pins to hook up to a vibrator motor.

Note that these are high drive open drain signals; LEDA is rated
for up to 160 mA (!), LEDB up to 60 mA.  Boards using one of these
signals to drive a bank of LCD backlight LEDs would probably want
to access the dedicated PWMs for brightness control, too; easy to
add such support later.

Example:  Beagle has one real LED here (PWM not necessary), and
one GPIO controlling VBUS output over EHCI (PWM not wanted).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Convert the hsmmc init code over to standard GPIO calls:
gpio_request(), gpio_free(), gpio_get_value_cansleep().

NOTE that this doesn't pass GPIO numbers in to hsmmc_init();
those values are still hard-wired.  (For the write protect
signal, the LACK of value is hard-wired...)  So the hsmmc
glue is still kind of problematic.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Use the new gpiolib internal mechanism for tracking gpio usage,
making them power the GPIO module on/off, so that the standard
gpio_request()/gpio_free() calls can completely replace the
twl4030-specific versions.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Add a new internal mechanism to gpiolib to support low power
operations by letting gpio_chip instances see when their GPIOs
are in use.  When no GPIOs are active, chips may be able to
enter lower powered runtime states by disabling clocks and/or
power domains.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Remove now unncessary casts and use the same order for include files.
Signed-off-by: Tony Lindgren <tony@atomide.com>

Simplify handling of VBUS and ID status and the USB_PRES interrupt.
This seems to resolve the problems I previously saw on Beagle and
Overo boards.

 - Read the status directly, instead of trying to infer it from
   dodgey side effects of IRQ handling and trigger tweaking.

 - Stop trying to arrange those dodgey side effects; just leave
   the IRQ enabled at all times.

 - Check that status as part of driver probe, so the PHY can
   always be active by the time it's needed.  (BUGFIX!)

 - Re-sequence probe() to be less racey, and to avoid duplicating
   logic found elsewhere (notably irq handling and PHY activation).

 - Make the irq_chip be the exclusive owner of PWR_EDR (finally).

 - Get rid of needless work_struct ... in this irq handling thread,
   it's safe and cheap to call sysfs_notify() directly.

Stop enabling IRQs on the USB subchip.  There's no IRQ handler for
them, and since ALT_INT_REROUTE isn't being set they'll never
arrive ... so there's no point to enabling them.

Also add some comments about other things such an otg_transciever
driver should be doing, fixing minor omissions; and remove some
unnecessary file inclusions.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Disable more unnecessary TWL4030_*IRQ_* symbols.

We're not yet ready to remove them all from <linux/i2c/twl4030.h>
since various drivers still use those symbols (maybe indirectly)
not platform resources: twl4030_bci_battery.c, twl4030-madc.c,
twl4030-pwrbutton.c, and omap-twl4030keypad.c all need updates.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Replace twl4030 GPIO IRQ handling with generic SIH support.
No change in functionality; but there's now one less kernel
thread tied up supporting this chip.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Replace twl4030-pwrirq with the more capable generic TWL SIH
support.

"More capable" includes standard support for IRQ trigger modes;
so make the RTC and USB transceiver drivers use genirq for that.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Add TWL4030 infrastructure for shared SIH interrupts.

This is basically what the twl4030 GPIO IRQ code does, but
switching to a workqueue to handle each irqchip's mask/unmask
and set_type operations instead of a kthread that must figure
out what to do each time it wakes up.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Switch to a different twl4030-irq SIH irq init scheme.  Its goal
is to remove some section issues while providing a data structure
that can be reused by generic SIH IRQ handling code.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Split the IRQ support out of twl4030-core.c into twl4030-irq.c,
including some minor tidy-ups and a note_interrupt() paranoia
in case of flakiness with some PIH interrupt.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Looks like we lost this at some point, add it back to sync
with mainline tree.
Signed-off-by: Tony Lindgren <tony@atomide.com>

omap_i2c_unidle() and omap_i2c_idle() are called recursively during
omap_i2c_probe().  This is evidently unexpected and will wipe
out the I2C interrupt enable register the second time that
omap_i2c_idle() is called consecutively.  Any I2C transactions
following a probe of a bus with at least one device on it will then
time out.

Fix by moving omap_i2c_idle() further up in omap_i2c_probe().  Ensure
the I2C controller is marked as idle before the probe starts.  Also
attempt to catch future reappearances of this bug early in development
by warning in omap_i2c_{un,}idle() when they are called recursively.

Problem reported by David Brownell <david-b@pacbell.net>.

Tested on 3430SDP and 2430SDP.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Richard Woodruff <r-woodruff2@ti.com>
Acked-by; Steve Sakoman <steve@sakoman.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Without this option, kernel builds would fail, with
errors similar to:

hsmmc.c:50: undefined reference to `twl4030_get_gpio_datain'
hsmmc.c:82: undefined reference to `twl4030_free_gpio'
hsmmc.c:63: undefined reference to `twl4030_request_gpio'
hsmmc.c:67: undefined reference to `twl4030_set_gpio_debounce'
Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

I can't test the pwrbutton stuff, but rtc and musb behave...

With one issue:  the usb transceiver glue misbehaves on
startup if the device is connected.  (Again.)  I looked at
this a bit, and I think the issue is probably caused by
not actually using key USB registers ... IRQ trigger
mode state transitions are at best a fragile proxy for the
real state.

(This is similar to the GPIO patch I just sent, but simpler
except for the impact on the few drivers thinking oddly
about IRQs.  Those patches cover the key SIH modules, and
a similar one affects the PIH in twl4030-core.)

- Dave

================================
Streamline the "power irq" code, and some of the mechanisms
it uses:

 - Support IRQ masking, not just unmasking; simpler code.
 - Use the standard handle_edge_irq() handler for these edge IRQs.
 - Use generic_handle_irq() instead of a manual expansion thereof.
 - Provide a missing spinlock for the shared data.

In short, use more of the standard genirq code ... more correctly.

Also, update the drivers using the "power IRQ" accordingly:

 - Don't request IRQF_DISABLED if the handler makes I2C calls;
   and defend against lockdep forcing it on us.

 - Let the irq_chip handle IRQ mask/unmask; it handles mutual
   exclusion between drivers, among other things.

 - (Unrelated) remove useless MODULE_ALIAS in pwrbutton.

The USB transceiver driver still places some dodgey games with IRQ
enable/disable, and IRQ trigger flags.  At least some of them seem
like they'd be simplified by using USB transceiver registers ...
notably, startup code, which doesn't seem to check state before
it enters an irq-driven mode.

For the moment, these drivers still (wrongly) try to configure IRQ
trigger modes themselves ... again, that's something that an irq_chip
handles (but not yet, for this one).

NOTE:  tested (MUSB and RTC only) along with the init/retry hack
to make twl4030-pwrirq work around the i2c-omap timeout problems.

Minor cosmetic clean-up for LDP for mainline
Signed-off-by: Tony Lindgren <tony@atomide.com>

Previously, the only external (to dispc.c) IRQ handler was RFBI's
frame done handler.  dispc's IRQ framework was very dumb: you could only
have one handler, and the semantics of {request,free}_irq were odd, to
say the least.

The new framework allows multiple consumers to register arbitrary IRQ
masks.
Signed-off-by: Daniel Stone <daniel.stone@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

The problem is related to the following notice in the documentation:
"Once a destructive window with up-scaling is created, it can only be
disabled by creating a background window.". With the current omapfb
driver code, if you try to do a partial screen update (show menu or
dialog) after a scaled screen update (video overlay), scaling setting
are not reset properly and you see this "magnifying glass" effect if a
part of new update overlaps previously scaled area.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@nokia.com>
Signed-off-by: Daniel Stone <daniel.stone@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Make Kconfig reflect reality.
Signed-off-by: Daniel Stone <daniel.stone@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

warning: 'rev_name' may be used uninitialized in this function
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Fix a trivial typo.
Signed-off-by: Jagadeesh Bhaskar Pakaravoor <j-pakaravoor@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Fix these compiler warnings:

gpmc.c: In function 'gpmc_init':
gpmc.c:432: warning: 'return' with a value, in function returning void
gpmc.c:439: warning: 'return' with a value, in function returning void
Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Commit 1c957036 breaks booting on
OMAP2; it causes the SRAM to be mapped on top of the L4 interconnect.
This causes the system to hang early in boot in omap_map_sram() during
the TLB flush. Fix by moving SRAM elsewhere in the memory map.

Reported by Jarkko Nikula <jarkko.nikula@nokia.com>.  This patch is a
collaboration with Tony Lindgren <tony@atomide.com> and
Kevin Hilman <khilman@deeprootsystems.com>.

Boot-tested on 2430SDP (by Paul) and N810 (by Jarkko).
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Måns Rullgård <mans@mansr.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Merge branches 'master' and 'linus'

This is debatable, but while we're debating it, let's disallow the
combination of splice and an O_APPEND destination.

It's not entirely clear what the semantics of O_APPEND should be, and
POSIX apparently expects pwrite() to ignore O_APPEND, for example.  So
we could make up any semantics we want, including the old ones.

But Miklos convinced me that we should at least give it some thought,
and that accepting writes at arbitrary offsets is wrong at least for
IS_APPEND() files (which always have O_APPEND set, even if the reverse
isn't true: you can obviously have O_APPEND set on a regular file).

So disallow O_APPEND entirely for now.  I doubt anybody cares, and this
way we have one less gray area to worry about.
Reported-and-argued-for-by: Miklos Szeredi <miklos@szeredi.hu>
Acked-by: Jens Axboe <ens.axboe@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>