This switches the GPIO poweroff driver to use GPIO descriptors
rather than numeral GPIOs. We get rid of the specific inversion
handling as GPIO descriptors know if they are active low or
high and can assert the line properly, so we do not need to
check the flag OF_GPIO_ACTIVE_LOW returned from the old call
of_get_gpio_flags() anymore.

Also convert to use managed resources and use dev_* message
printing while we're at it.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NSebastian Reichel <sre@kernel.org>

The keystone SoC can be rebooted in several ways. By external reset
pin, by soft and by watchdogs. To allow keystone SoC reset if
watchdog is triggered we have to enable it in reset mux configuration
register regarding of watchdog configuration. Also we need to set
soft/hard reset we are going to use.

So add keystone reset driver to handle all this stuff.
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NIvan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>

Add Axxia (AXM55xx) SoC system reset driver. This driver handles only system
reboot (and not power-off).
Signed-off-by: NAnders Berg <anders.berg@lsi.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

That code used to be in the machine code, but it's more fit here with other
restart hooks.

That will allow to cleanup the machine directory, while waiting for a proper
watchdog driver for the A31.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>

Components of the Versatile Express platform (configuration
microcontrollers on motherboard and daughterboards in particular)
talk to each other over a custom configuration bus. They
provide miscellaneous functions (from clock generator control
to energy sensors) which are represented as platform devices
(and Device Tree nodes). The transactions on the bus can
be generated by different "bridges" in the system, some
of which are universal for the whole platform (for the price
of high transfer latencies), others restricted to a subsystem
(but much faster).

Until now drivers for such functions were using custom "func"
API, which is being replaced in this patch by regmap calls.
This required:

* a rework (and move to drivers/bus directory, as suggested
  by Samuel and Arnd) of the config bus core, which is much
  simpler now and uses device model infrastructure (class)
  to keep track of the bridges; non-DT case (soon to be
  retired anyway) is simply covered by a special device
  registration function

* the new config-bus driver also takes over device population,
  so there is no need for special matching table for
  of_platform_populate nor "simple-bus" hack in the arm64
  model dtsi file (relevant bindings documentation has
  been updated); this allows all the vexpress devices
  fit into normal device model, making it possible
  to remove plenty of early inits and other hacks in
  the near future

* adaptation of the syscfg bridge implementation in the
  sysreg driver, again making it much simpler; there is
  a special case of the "energy" function spanning two
  registers, where they should be both defined in the tree
  now, but backward compatibility is maintained in the code

* modification of the relevant drivers:

  * hwmon - just a straight-forward API change
  * power/reset driver - API change
  * regulator - API change plus error handling
    simplification
  * osc clock driver - this one required larger rework
    in order to turn in into a standard platform driver
Signed-off-by: NPawel Moll <pawel.moll@arm.com>
Acked-by: NMark Brown <broonie@linaro.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NMike Turquette <mturquette@linaro.org>

The restart/power off implementation in the vexpress driver
used to obtain the config function when necessary. This was
wrong in two respects:

1. It required memory allocation with disabled interrupts
(it worked, but lockdep - when enabled - reported warnings).

2. Used jiffies-based timeout, while jiffies are not running
at this stage of system shutdown (therefore a config
transaction error - if happened - would have never be reported).

Fixed by pre-allocating the config function per device
and using mdelay for timeout.
Signed-off-by: NPawel Moll <pawel.moll@arm.com>

The Synology NAS devices use a very similar mechanism to QNAP NAS
devices to power off. Both send a single charactor command to a PIC,
over the second serial port. However the baud rate and the command
differ. Generalize the driver to support this.
Signed-off-by: NBen Peddell <klightspeed@killerwolves.net>
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Acked-by: NJason Cooper <jason@lakedaemon.net>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

We've split Qualcomm MSM support into legacy and multiplatform.  The reset
driver is only relevant on the multiplatform supported SoCs so switch the
Kconfig depends to ARCH_QCOM.

Acked-by: Dmitry Eremin-Solenikov
Signed-off-by: NKumar Gala <galak@codeaurora.org>

ams AS3722 supports the power off functionality to turn off system.

This commit adds power off driver for ams AS3722.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Tested-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NAnton Vorontsov <anton@enomsg.org>

ARM Versatile Express reset driver requires platform-specific config
infrastructure to be present in the kernel. When VEXPRESS_CONFIG is not
selected, the build will fail like this:

drivers/built-in.o: In function `vexpress_reset_do.clone.0':
iio-trig-interrupt.c:(.text+0x1aff38): undefined reference to `__vexpress_config_func_get'
iio-trig-interrupt.c:(.text+0x1aff4c): undefined reference to `vexpress_config_write'

Added required dependency to the Kconfig entry.
Signed-off-by: NPawel Moll <pawel.moll@arm.com>
Signed-off-by: NAnton Vorontsov <anton@enomsg.org>

Add APM X-Gene SoC system reboot driver. This driver handles only system
reboot. System shutdown is board specific and can be handled by board
driver or GPIO based shutdown driver.
Signed-off-by: NLoc Ho <lho@apm.com>
Signed-off-by: NFeng Kan <fkan@apm.com>
Signed-off-by: NKumar Sankaran <ksankaran@apm.com>
Signed-off-by: NAnton Vorontsov <anton@enomsg.org>

Add support for restart and poweroff functionality present on MSM chipsets
with the MPM2 ps-hold hardware.
Signed-off-by: NAbhimanyu Kapur <abhimany@codeaurora.org>
Tested-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Reviewed-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NAnton Vorontsov <anton@enomsg.org>

Preparing to move the parsing of reboot= to generic kernel code forces
the change in reboot_mode handling to use the enum.

[akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c]
Signed-off-by: NRobin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The driver can be used on either arm or arm64 platforms, but
the latter doesn't have any platform-specific configuration
options, so it must be possible to manually enable the driver.
Signed-off-by: NPawel Moll <pawel.moll@arm.com>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NAnton Vorontsov <anton@enomsg.org>

This patch adds the pm_power_off and arm_pm_restart variable settings to
the vexpress-poweroff.c driver to decouple it from the machine_desc
definition.
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Acked-by: NPawel Moll <pawel.moll@arm.com>

This patch moves the arch/arm/mach-vexpress/reset.c functionality to
drivers/platform/reset/ and adds the necessary Kconfig wiring.
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Acked-by: NPawel Moll <pawel.moll@arm.com>

__devinit, __devexit and __devexit_p have recently been removed and
should no longer be used.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>
Acked-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAnton Vorontsov <anton@enomsg.org>

GPLv2+ is not a valid license string. Replace it with one that is.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAnton Vorontsov <anton@enomsg.org>

Some devices, Buffalo Linkstation LS-XHL and LS-CHLv2 for example,
power-off by restarting to letting u-boot hold the SoC until the user
presses a key. Add a generic driver to implement this. It binds a function
to pm_power_off, which calls arm_pm_restart.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Tested-by: NMichael Walle <michael@walle.cc>
Signed-off-by: NAnton Vorontsov <anton@enomsg.org>

The QNAP NAS boxes have a microcontroller attached to the SoCs second
serial port. By sending it a simple command, it will turn the power for
the board off. This driver registers a function for pm_power_off to send
such a command.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAnton Vorontsov <anton@enomsg.org>

Improve the documentation to clarify level vs edge triggered power off.
Improve the comments for level vs edge triggered power off.
Make use of gpio_is_valid().
Reported-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitconst,
and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Jamie Lentin <jm@lentin.co.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Given appropriate devicetree bindings, this driver registers a
pm_power_off function to set a GPIO line high/low to power down
your board.
Signed-off-by: NJamie Lentin <jm@lentin.co.uk>
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Tested-by: NSimon Baatz <gmbnomis@gmail.com>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>