i2c-mux-gpio: Use devm_kzalloc instead of kzalloc

Use the devm_kzalloc managed function to stripdown the error and remove
code.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
i2c-mux-gpio: Add support for dynamically allocated GPIO pins

The code instantiating an i2c-mux-gpio platform device doesn't
necessarily know in advance the GPIO pin numbers it wants to use. If
pins are on a GPIO device which gets its base GPIO number assigned
dynamically at run-time, the values can't be hard-coded.

In that case, let the caller tell i2c-mux-gpio the name of the GPIO
chip and the (relative) GPIO pin numbers to use. At probe time, the
i2c-mux-gpio driver will look for the chip and apply the proper offset
to turn relative GPIO pin numbers to absolute GPIO pin numbers.

The same could be (and was so far) done on the caller's end, however
doing it in i2c-mux-gpio has two benefits:
* It avoids duplicating the code on every caller's side (about 30
  lines of code.)
* It allows for deferred probing for the muxed part of the I2C bus
  only. If finding the GPIO chip is the caller's responsibility, then
  deferred probing (if the GPIO chip isn't there yet) will not only
  affect the mux and the I2C bus segments behind it, but also the I2C
  bus trunk.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Peter Korsgaard <peter.korsgaard@barco.com>
i2c-mux-gpio: Update documentation

* Document the possibility to pass relative GPIO pin numbers.
* Document what platform device IDs to use, so that they do not
  collide.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Peter Korsgaard <peter.korsgaard@barco.com>
i2c-i801: Let i2c-mux-gpio find the GPIO chip

Now that i2c-mux-gpio is able to find the GPIO chip by itself, we can
delegate this task. The great thing here is that i2c-mux-gpio can
defer device probing until the gpio chip is available, so we no longer
depend on the module loading order.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
i2c: Correct struct i2c_driver doc about detection

s/address_data/address_list/ in addition to c3813d6.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
i2c-piix4: Fix build failure

Fix build failure in Intel PIIX4 I2C driver.

Signed-off-by: Daniel J Blueman <daniel@quora.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@vger.kernel.org [v3.6]
ath9k: fix ASPM initialization on resume

ath_pci_aspm_init is only called on card init, so PCI registers get reset
after a suspend/resume cycle.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
ath9k: improve suspend/resume reliability

Ensure that drv_start() always returns true, as a failing hw start usually
eventually leads to crashes when there's still a station entry present.
Call a power-on reset after a resume and after a hw reset failure to bring
the hardware back to life again.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
ath9k: use ieee80211_free_txskb

Using ieee80211_free_txskb for tx frames is required, since mac80211 clones
skbs for which socket tx status is requested.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
rt2x00/rt3352: Fix lnagain assignment to use register 66.

This should be register 66 instead of 62.
(probably happened by copy&past'ing from the lines below)

Signed-off-by: Daniel Golle <dgolle@allnet.de>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
sparc64: Niagara-4 bzero/memset, plus use MRU stores in page copy.

This adds optimized memset/bzero/page-clear routines for Niagara-4.

We basically can do what powerpc has been able to do for a decade (via
the "dcbz" instruction), which is use cache line clearing stores for
bzero and memsets with a 'c' argument of zero.

As long as we make the cache initializing store to each 32-byte
subblock of the L2 cache line, it works.

As with other Niagara-4 optimized routines, the key is to make sure to
avoid any usage of the %asi register, as reads and writes to it cost
at least 50 cycles.

For the user clear cases, we don't use these new routines, we use the
Niagara-1 variants instead.  Those have to use %asi in an unavoidable
way.

A Niagara-4 8K page clear costs just under 600 cycles.

Add definitions of the MRU variants of the cache initializing store
ASIs.  By default, cache initializing stores install the line as Least
Recently Used.  If we know we're going to use the data immediately
(which is true for page copies and clears) we can use the Most
Recently Used variant, to decrease the likelyhood of the lines being
evicted before they get used.

Signed-off-by: David S. Miller <davem@davemloft.net>
Merge branch 'fixes' into for-linus
NFSv4.1: Cleanup ugliness in pnfs_layoutgets_blocked()

Split it into two functions, one which checks if layoutgets are blocked,
and one which checks if the layout stateid has expired.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[media] technisat-usb2: add a MODULE_DEVICE_TABLE for udev autoload

This patch adds a module-device-table-entry to the
technisat-usb2-driver which will help udev to on-demand load the
driver. This was obviously forgotten during initial commit.

Signed-off-by: Patrick Boettcher <pboettcher@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[media] s5p-jpeg: use clk_prepare_enable and clk_disable_unprepare

Convert clk_enable/clk_disable to clk_prepare_enable/clk_disable_unprepare
calls as required by common clock framework.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[media] s5p-g2d: fix compiler warning

drivers/media/platform/s5p-g2d/g2d.c:535:2: warning: passing argument 3 of 'vidioc_try_crop' discards 'const' qualifier from pointer target type [enabled by default]
drivers/media/platform/s5p-g2d/g2d.c:510:12: note: expected 'struct v4l2_crop *' but argument is of type 'const struct v4l2_crop *'
This is fall-out from this commit:
commit 4f996594ceaf6c3f9bc42b40c40b0f7f87b79c86
Author: Hans Verkuil <hans.verkuil@cisco.com>
    [media] v4l2: make vidioc_s_crop const

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[media] s5p-fimc: fix compiler warning

drivers/media/platform/s5p-fimc/fimc-m2m.c:561:2: warning: passing argument 2 of 'fimc_m2m_try_crop' discards 'const' qualifier from pointer target type [enabled by default]
drivers/media/platform/s5p-fimc/fimc-m2m.c:502:12: note: expected 'struct v4l2_crop *' but argument is of type 'const struct v4l2_crop *'
This is fall-out from this commit:
commit 4f996594ceaf6c3f9bc42b40c40b0f7f87b79c86
Author: Hans Verkuil <hans.verkuil@cisco.com>
    [media] v4l2: make vidioc_s_crop const

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[media] V4L: Add s_rx_buffer subdev video operation

The s_rx_buffer callback allows the host to set buffer for a data being
received by the subdev, e.g. non-image frame (meta) data. This callback
can be implemented by subdevice like a MIPI CSI2 receiver, allowing the
host driver to gather additional data into frame buffer passed to user
space.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[media] V4L: Add [get/set]_frame_desc subdev callbacks

Add subdev callbacks for setting up parameters of the frame on media bus
that are not exposed to user space directly. This is just an initial,
mostly stub implementation. struct v4l2_mbus_frame_desc is intended
to be extended with sub-structures specific to a particular hardware media
bus. For now these new callbacks are used only to query or specify maximum
size of a compressed or hybrid (container) media bus frame in octets.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[media] V4L: Add V4L2_MBUS_FMT_S5C_UYVY_JPEG_1X8 media bus format

This patch adds media bus pixel code for the interleaved JPEG/UYVY
image format used by S5C73MX Samsung cameras. This interleaved image
data is transferred on MIPI-CSI2 bus as User Defined Byte-based Data.
It also defines an experimental vendor and device specific media bus
formats section and adds related DocBook documentation.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>