There is no point in displaying the TS5500-specific driver entries if
TS5500 board support itself isn't enabled.
Signed-off-by: NJean Delvare <jdelvare@suse.de>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: NAlexandre Courbot <gnurou@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Variable "offset" cannot be negative, so no need to check if it
greater than zero or equal.
Signed-off-by: NAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Variable 'irq' is declared as unsigned and then used to store
negative return values from irq_alloc_descs() such as -EINVAL.
This patch fix this by declaring the variable as a signed.
Signed-off-by: NAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use devm_ioremap_resource() in order to make the code simpler,
and remove redundant return value check of platform_get_resource()
because the value is checked by devm_ioremap_resource().
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Acked-by: NKevin Hilman <khilman@linaro.org>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use devm_ioremap_resource() in order to make the code simpler.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

If no device tree node existed for a device when CONFIG_OF_GPIO was
defined, then gpio_base would not default to -1.
Signed-off-by: NAaron Sierra <asierra@xes-inc.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Add Exar XRA1202 8-bit GPIO expander to supported list.
Signed-off-by: NAaron Sierra <asierra@xes-inc.com>
Acked-by: NGraeme Smecher <gsmecher@threespeedlogic.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Add the NXP PCA9698 40-bit GPIO expander to the supported list.
Note: This only enables GPIO functionality.
Tested-by: NBob Schmitz <bschmitz@xes-inc.com>
Signed-off-by: NAaron Sierra <asierra@xes-inc.com>
Acked-by: NGraeme Smecher <gsmecher@threespeedlogic.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The pca953x driver supports tca6424 (24-bit) and pca9505 (40-bit)
devices. They were the only supported devices not mentioned in the
Kconfig help.
Signed-off-by: NAaron Sierra <asierra@xes-inc.com>
Acked-by: NGraeme Smecher <gsmecher@threespeedlogic.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

which is already found in the common header for adp5588
Signed-off-by: NJean-Francois Dagenais <jeff.dagenais@gmail.com>
Acked-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

As discussed here: http://ez.analog.com/message/35852,
the 5587 revC and 5588 revB spec sheets contain a mistake
in the GPIO_DAT_STATx register description.

According to R.Shnell at ADI, as well as my own
observations, it should read:
"GPIO data status (shows GPIO state when read for inputs)".

This commit changes the get value function accordingly.
Signed-off-by: NJean-Francois Dagenais <jeff.dagenais@gmail.com>
Acked-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

gpio_to_desc() must die. Replace one of its usage by the
newly-introduced gpiochip_get_desc() function.
Signed-off-by: NAlexandre Courbot <acourbot@nvidia.com>
Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Some drivers dealing with a gpio_chip might need to act on its
descriptors directly; one example is pinctrl drivers that need to lock a
GPIO for being used as IRQ using gpiod_lock_as_irq().

This patch exports a gpiochip_get_desc() function that returns the
GPIO descriptor at the requested index. It also sweeps the
gpio_to_chip() function out of the consumer interface since any holder
of a gpio_chip reference can manipulate its GPIOs way beyond what a
consumer should be allowed to do.

As a result, gpio_chip is not visible anymore to simple GPIO consumers.
Signed-off-by: NAlexandre Courbot <acourbot@nvidia.com>
Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: NJean-Jacques Hiblot <jjhiblot@traphandler.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Signed-off-by: NRahul Bedarkar <rahulbedarkar89@gmail.com>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

On currently supported SoCs, the GPIO block used on Marvell EBU SoCs
is always connected to the Marvell MPIC. However, we are going to
introduce the support for newer Marvell EBU SoCs that use the
Cortex-A9 core, and therefore use the GIC as their main interrupt
controller, to which the GPIO block controlled by the gpio-mvebu
driver is connected.

The GIC interrupt controller driver uses the fasteoi flow handler. In
order to ensure that the eoi hook of the GIC driver gets called, the
GPIO driver should call chained_irq_enter() and chained_irq_exit() in
its handler. Without this, the first GPIO interrupt locks up the
system because it doesn't get acked at the GIC level.

This change is similar to for example commit
0d978eb7 ("gpio: davinci: use
chained_irq_enter/chained_irq_exit API").
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: NJason Cooper <jason@lakedaemon.net>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch allows GPIO driver to cache GPIO_LVL output registers. The aim is to
support chipsets on which GPIO_LVL value can't be read for output pins.

Caching output levels implies the first output values reading as 0. The driver
so can't be aware of set values GPIOs by bootloader or BIOS.
Signed-off-by: NVincent Donnefort <vdonnefort@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch introduces regs and reglen pointers which allow a chipset to have
register addresses differing from ICH ones.
Signed-off-by: NVincent Donnefort <vdonnefort@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch allows gpio_ich driver to be aware of non blink capable chipsets.
Signed-off-by: NVincent Donnefort <vdonnefort@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The documentation was not clear about whether
gpio_direction_output should take a logical value or the physical
level on the output line, i.e. whether the ACTIVE_LOW status
would be taken into account.

This converts gpiod_direction_output to use the logical level
and adds a new gpiod_direction_output_raw for the raw value.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The generic GPIO would return 0 for low generic GPIO, and
something != 0 for high GPIO. Let's make this sane by clamping
the returned value to [0,1].
Reported-by: NEvgeny Boger <boger@contactless.ru>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Add missing .owner of struct gpio_chip. This prevents the
module from being removed from underneath its users.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

commit f1f70479 "gpio: pl061: support irqdomain" drops the support of
irq generic chip and use irqdomain instead. Thus fixes the dependency by
selecting IRQ_DOMAIN rather than GENERIC_IRQ_CHIP.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

When registering more than one platform device, it is
useful to set the gpio chip label in the platform data.
Signed-off-by: NPawel Moll <pawel.moll@arm.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch removes some inconsistencies caused by the use of "int gpio"
in some parts of the code and "unsigned gpio" in others.
Signed-off-by: NMarkus Mayer <markus.mayer@linaro.org>
Reviewed-by: NTim Kryger <tim.kryger@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

PTR_RET is deprecated. Use PTR_ERR_OR_ZERO instead. While at it
also include missing err.h header.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Rather than unlock/re-lock for every write access, unlock a GPIO when
it is requested and re-lock it when it is freed. As a result, the GPIO
helper functions no longer have to deal with unlocking and re-locking
the register.

In addition, only unlock a specific GPIO rather than unlocking the
entire GPIO bank as before.
Signed-off-by: NMarkus Mayer <markus.mayer@linaro.org>
Reviewed-by: NTim Kryger <tim.kryger@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The GPIO_CONTROL macro returns the control register offset when given a
GPIO number.

Update the argument name in the macro to reflect that it takes in a
GPIO number and not a bank.
Signed-off-by: NMarkus Mayer <markus.mayer@linaro.org>
Reviewed-by: NTim Kryger <tim.kryger@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This is a simple cleanup on gpio-intel-mid.c's header comments.
Signed-off-by: NDavid Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Drop the " gpio" suffix after the pl061 irq_chip name:
this is only confusing: an irqchip name should be a single,
short, simple string that looks nice in /proc/interrupts.

Drop the nameing of each individual IRQ to "pl061" - I
think this naming function is for naming the IRQ line,
not for boilerplating them all with the name of the
parent controller, which is already known from the
.name field of the irq_chip.

Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Deepak Sikri <deepak.sikri@st.com>
Acked-by: NBaruch Siach <baruch@tkos.co.il>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Refactor this function so that I can understand it, do one
big read/modify/write operation and have the bitmask in a
variable instead of recalculating it every time it's needed.

Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Deepak Sikri <deepak.sikri@st.com>
Acked-by: NBaruch Siach <baruch@tkos.co.il>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This uses the new API for tagging GPIO lines as in use by
IRQs. This enforces a few semantic checks on how the underlying
GPIO line is used.

Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Deepak Sikri <deepak.sikri@st.com>
Acked-by: NBaruch Siach <baruch@tkos.co.il>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This makes the PL061 driver print proper error messages
when probe fails, and also tell us when the chip is finally
registered.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The built-in ROM fonts lack many necessary ASCII characters, which is
why it makes sens to prefer the Linux fonts instead if they are
available.  This makes consoles on STI graphics cards which are not
supported by the stifb driver (e.g. Visualize FXe) looks much nicer.
Signed-off-by: NHelge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v3.13

Similar to what was done for the lm75 driver.

Add depends on THERMAL since that is what provides the
register/unregister functions above, but only if THERMAL_OF was
selected as this is an optional feature of the driver.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>

Based on an earlier attempt by Randy Dunlap.

Fix SENSORS_LM75 dependencies to eliminate build errors:

drivers/built-in.o: In function `lm75_remove':
lm75.c:(.text+0x12bd8c): undefined reference to `thermal_zone_of_sensor_unregister'
drivers/built-in.o: In function `lm75_probe':
lm75.c:(.text+0x12c123): undefined reference to `thermal_zone_of_sensor_register'

Add depends on THERMAL since that is what provides the
register/unregister functions above, but only if THERMAL_OF was
selected as this is an optional feature of the driver.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>

Revert commit ef83b078 "PCI: Remove from bus_list and release
resources in pci_release_dev()" that made some nasty race conditions
become possible.  For example, if a Thunderbolt link is unplugged
and then replugged immediately, the pci_release_dev() resulting from
the hot-remove code path may be racing with the hot-add code path
which after that commit causes various kinds of breakage to happen
(up to and including a hard crash of the whole system).

Moreover, the problem that commit ef83b078 attempted to address
cannot happen any more after commit 8a4c5c32 "PCI: Check parent
kobject in pci_destroy_dev()", because pci_destroy_dev() will now
return immediately if it has already been executed for the given
device.

Note, however, that the invocation of msi_remove_pci_irq_vectors()
removed by commit ef83b078 from pci_free_resources() along with
the other changes made by it is not added back because of subsequent
code changes depending on that modification.

Fixes: ef83b078 (PCI: Remove from bus_list and release resources in pci_release_dev())
Reported-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When an clock is specified in the device tree, enable it and use it to
determine the external clock frequency.
Signed-off-by: NTim Kryger <tim.kryger@linaro.org>
Reviewed-by: NMarkus Mayer <markus.mayer@linaro.org>
Reviewed-by: NMatt Porter <matt.porter@linaro.org>
Reviewed-by: NChristian Daudt <bcm@fixthebug.org>
Acked-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NChristian Daudt <bcm@fixthebug.org>
Signed-off-by: NOlof Johansson <olof@lixom.net>

This patch fixes a bug/typo in the CCI driver kcalloc usage
that inadvertently swapped the parameters order in the
kcalloc call and went unnoticed.
Reported-by: NXia Feng <xiafeng@allwinnertech.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Current xen-selfballoon driver is too aggressive which may cause OOM be
triggered more often. Eg. this bug reported by James:
https://lkml.org/lkml/2013/11/21/158

There are two mainly reasons:
1) The original goal_page didn't consider some pages used by kernel space, like
slab pages and pages used by device drivers.

2) The balloon driver may not give back memory to guest OS fast enough when the
workload suddenly aquries a lot of physical memory.

In both cases, the guest OS will suffer from memory pressure and OOM may
be triggered.

The fix is make xen-selfballoon driver not that aggressive by adding extra 10%
of total ram pages to goal_page.
It's more valuable to keep the guest system reliable and response faster than
balloon out these 10% pages to XEN.
Signed-off-by: NBob Liu <bob.liu@oracle.com>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>

The grant mapping API does m2p_override unnecessarily: only gntdev needs it,
for blkback and future netback patches it just cause a lock contention, as
those pages never go to userspace. Therefore this series does the following:
- the original functions were renamed to __gnttab_[un]map_refs, with a new
  parameter m2p_override
- based on m2p_override either they follow the original behaviour, or just set
  the private flag and call set_phys_to_machine
- gnttab_[un]map_refs are now a wrapper to call __gnttab_[un]map_refs with
  m2p_override false
- a new function gnttab_[un]map_refs_userspace provides the old behaviour

It also removes a stray space from page.h and change ret to 0 if
XENFEAT_auto_translated_physmap, as that is the only possible return value
there.

v2:
- move the storing of the old mfn in page->index to gnttab_map_refs
- move the function header update to a separate patch

v3:
- a new approach to retain old behaviour where it needed
- squash the patches into one

v4:
- move out the common bits from m2p* functions, and pass pfn/mfn as parameter
- clear page->private before doing anything with the page, so m2p_find_override
  won't race with this

v5:
- change return value handling in __gnttab_[un]map_refs
- remove a stray space in page.h
- add detail why ret = 0 now at some places

v6:
- don't pass pfn to m2p* functions, just get it locally
Signed-off-by: NZoltan Kiss <zoltan.kiss@citrix.com>
Suggested-by: NDavid Vrabel <david.vrabel@citrix.com>
Acked-by: NDavid Vrabel <david.vrabel@citrix.com>
Acked-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>