ARM: mvebu: make the snoop disabling optional in mvebu_v7_pmsu_idle_prepare()

On some mvebu v7 SoCs (the ones using a Cortex-A9 core and not a PJ4B
core), the snoop disabling feature does not exist as the hardware
coherency is handled in a different way. Therefore, in preparation to
the introduction of the cpuidle support for those SoCs, this commit
modifies the mvebu_v7_psmu_idle_prepare() function to take several
flags, which allow to decide whether snooping should be disabled, and
whether we should use the deep idle mode or not.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1406120453-29291-9-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
ARM: mvebu: export the SCU address

The SCU address will be needed in other files than board-v7.c,
especially in pmsu.c for cpuidle related activities. So this patch
adds a function that allows to retrieve the virtual address at which
the SCU has been mapped.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1406120453-29291-10-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
cpuidle: mvebu: rename the driver from armada-370-xp to mvebu-v7

This driver will be able to manage the cpuidle for more SoCs than just
Armada 370 and XP. It will also support Armada 38x and potentially
other SoC of the Marvell Armada EBU family. To take this into account,
this patch renames the driver and its symbols.

It also changes the driver name from cpuidle-armada-370-xp to
cpuidle-armada-xp, because separate platform drivers will be
registered for the other SoC types. This change must be done
simultaneously in the cpuidle driver and in the PMSU code in order to
remain bisectable.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lkml.kernel.org/r/1406120453-29291-12-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
cpuidle: mvebu: add Armada 370 support

This commit adds the list of cpuidle states supported by the Armada
370 SoC in the cpuidle-mvebu-v7 driver, as well as the necessary logic
around it to support this SoC.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lkml.kernel.org/r/1406120453-29291-13-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
cpuidle: mvebu: add Armada 38x support

This commit adds the list of cpuidle states supported by the Armada
38x SoC in the cpuidle-mvebu-v7 driver, as well as the necessary logic
around it to support this SoC.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lkml.kernel.org/r/1406120453-29291-14-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
ARM: mvebu: add cpuidle support for Armada 370

This commit introduces the cpuidle support for Armada 370. The main
difference compared to the already supported Armada XP is that the
Armada 370 has an issue caused by "a slow exit process from the deep
idle state due to heavy L1/L2 cache cleanup operations performed by
the BootROM software" (cf errata GL-BootROM-10).

To work around this issue, we replace the restart code of the BootROM
by some custom code located in an internal SRAM. For this purpose, we
use the common function mvebu_boot_addr_wa() introduced in the commit
"ARM: mvebu: Add a common function for the boot address work around".

The message in case of failure to suspend the system was switched from
the warn level to the debug level. Indeed due to the "slow exit
process from the deep idle state" in Armada 370, this situation
happens quite often. Using the debug level avoids spamming the kernel
logs, but still allows to enable it if needed.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1406120453-29291-15-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
ARM: mvebu: add cpuidle support for Armada 38x

Unlike the Armada XP and the Armada 370, this SoC uses a Cortex A9
core. Consequently, the procedure to enter the idle state is
different: interaction with the SCU, not disabling snooping, etc.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1406120453-29291-16-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
gpio: remove useless check in gpiolib_sysfs_init()

An iterator variable cannot be NULL in its loop.

Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
gpio: remove gpio_ensure_requested()

gpio_ensure_requested() has been introduced in Feb. 2008 by commit
d2876d08d86f2 to force users of the GPIO API to explicitly request GPIOs
before using them.

Hopefully by now all GPIOs are correctly requested and this extra check
can be omitted ; in any case the GPIO maintainers won't feel bad if
machines start failing after 6 years of warnings.

This patch removes that function from the dark ages.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Merge tag 'v3.16-rc6' into next

Merge with mainline to bring in changes to MFD to allow merging
ipaq-micro-ts driver.
Input: driver for touchscreen on iPaq h3xxx

This adds a driver for the touchscreen connected to the Atmel
microcontroller on the iPAQ h3xxx series.

Based on a driver from handhelds.org 2.6.21 kernel, written by Alessandro
GARDICH, with the bulk of the code for the new input architecture rewritten
by Dmitry Atamonow, and the final polish by Linus Walleij.

Signed-off-by: Alessandro GARDICH <gremlin@gremlin.it>
Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Input: ipaq-micro-ts - introduce open/close

Wire up open/close so we do not try to send events until someone uses them;
this also allows us to remove micro_ts_remove() and rely fully on managed
resources.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Merge branch 'mvebu/soc-cpuidle' into mvebu/soc

Conflicts:
	arch/arm/mach-mvebu/pmsu.c
ARM: mvebu: fix build without platforms selected

When building a multiplatform kernel that enables 'ARCH_MVEBU' but
none of the individual options under it, we get this link error:

arch/arm/mach-mvebu/built-in.o: In function `mvebu_armada375_smp_wa_init':
:(.text+0x190): undefined reference to `mvebu_setup_boot_addr_wa'

The best solution seems to be to ensure that in this configuration,
we don't actually build any of the mvebu code.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/7339332.ZE2mWIdyDh@wuerfel
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
ARM: dts: dove: add DT LCD controllers

Add the DT fragment for the Marvell Dove LCD controllers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: https://lkml.kernel.org/r/E1XAKGS-0004WE-8h@rmk-PC.arm.linux.org.uk
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Documentation: arm: add URLs to public datasheets for the Marvell Armada XP SoC

Marvell has very recently released a public version of the "Functional
specifications" and "Hardware specifications" datasheets for the
Marvell Armada XP SoC. This allows contributors and developers not
under NDA with Marvell to get more details about this SoC than what
the current kernel code shows, and hopefully allows to improve the
support for this SoC in the mainline kernel, as well as in other
projects.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lkml.kernel.org/r/1406227593-29749-2-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Documentation: arm: misc updates to Marvell EBU SoC status

Following the merging of mach-kirkwood into mach-mvebu, the removal of
mach-kirkwood, and the progress of the integration of mach-dove into
mach-mvebu, this commit makes a few updates to the Marvell README file
in the kernel documentation.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lkml.kernel.org/r/1406227593-29749-3-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
drm/i915/userptr: Keep spin_lock/unlock in the same block

Move the code around in order to acquire and release the spinlock in the
same function and in the same block. This keeps static analysers happy
and the reader sane.

Suggested-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Documentation: devicetree: Adapteva vendor prefix

Cc: Andreas Olofsson <andreas@adapteva.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Documentation: devicetree: Adapteva boards

We're about to add a device tree for the Parallella board.

Cc: Andreas Olofsson <andreas@adapteva.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>