PID  PPID USER     STAT   VSZ %VSZ %CPU COMMAND
  144     2 root     DW       0   0%  33% [ina226:1-8800us]
  141     2 root     DW       0   0%  25% [ina226:0-8800us]
   40     2 root     SW       0   0%  15% [irq/156-4802a00]
  147     2 root     DW       0   0%   7% [ina226:2-8800us]
  145     1 root     S     1236   0%   6% dd if /dev/iio:device1 of /dev/null
  148     1 root     S     1236   0%   4% dd if /dev/iio:device2 of /dev/null
  149   137 root     R     1244   0%   3% top -d 1
  142     1 root     S     1236   0%   2% dd if /dev/iio:device0 of /dev/null
Signed-off-by: NMarc Titinger <mtitinger@baylibre.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Different probe modules use different resistor values. The front-end
application may read a probe ID (from eeprom) and set the shunt value
accordingly.
Signed-off-by: NMarc Titinger <mtitinger@baylibre.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This can lead to repeated or skipped samples depending on the clock beat
between the capture thread and the chip sampling clock, but will also spare
reading/waiting for the Capture Ready Flag and improve the available i2c
bandwidth for reading measurements.

Output of iio_info:
...snip...
4 device-specific attributes found:
  attr 0: in_oversampling_ratio value: 4
  attr 1: in_allow_async_readout value: 0
  attr 2: integration_time_available value: 140 204 332 588 1100 2116...
  attr 3: in_sampling_frequency value: 114
Signed-off-by: NMarc Titinger <mtitinger@baylibre.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

in SOFTWARE buffer mode, a kthread will capture the active scan_elements
into a kfifo, then compute the remaining time until the next capture tick
and do an active wait (udelay).

This will produce a stream of up to fours channels plus a 64bits
timestamps (ns).

Tested with ina226, on BeagleBoneBlack.

Datasheet: http://www.ti.com/lit/gpn/ina226Signed-off-by: NMarc Titinger <mtitinger@baylibre.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Add support for AMS iAQ-core continuous and pulsed VOC sensors.
Signed-off-by: NMatt Ranostay <mranostay@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

MAX30100 is an heart rate and pulse oximeter sensor that works using
two LEDS of different wavelengths, and detecting the light reflected
back.

This patchset adds support for both IR and RED LED channels which can
be processed in userspace to determine heart rate and blood oxygen
levels.
Signed-off-by: NMatt Ranostay <mranostay@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Signed-off-by: NOliver Stäbler <oliver.staebler@bytesatwork.ch>
Reviewed-by: NMartin Kepplinger <martink@posteo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The iio dummy code was recently changed to use irq_work_queue, but
that code is compiled into the kernel only if IRQ_WORK is set, so
we can get a link error here:

drivers/built-in.o: In function `iio_evgen_poke':
(.text+0x208a04): undefined reference to `irq_work_queue'

This changes the Kconfig file to match what other drivers do.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: fd2bb310 ("Staging: iio: Move evgen interrupt generation to irq_work")
Acked-by: NDaniel Baluta <daniel.baluta@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Definition of ST_SENSORS_WAI_ADDRESS was introduced within a very
first commit of this driver, but it was never used.
This address is already defined as ST_SENSORS_DEFAULT_WAI_ADDRESS
in include/linux/iio/common/st_sensors.h

To avoid duplication of the same constant in two different places
called almost exactly the same, the one which was never used
should be removed.
Signed-off-by: NRobert Kmiec <robert.r.kmiec@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Optimize device tranactions using i2c transfers versus multiple
possibly racey i2c_smbus_* function calls, and only one transaction
for distance measurement. Falls back to smbus method if i2c
functionality isn't available.
Signed-off-by: NMatt Ranostay <mranostay@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This exported element needs to be accesible to all drivers using configfs
within IIO.  Previously it was in the sw_trig.h file which only convered one
such usecase.  This also fixes a sparse warning as it is now in a header
that makes sense to include from industrialio-configfs.c

Signed-off-by: Jonathan Cameron < jic23@kernel.org>

Add an optimized i2c transfer reading function, and fallback
to racey smbus transfers if client->adapter doesn't support this.
Signed-off-by: NMatt Ranostay <mranostay@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch registers a new IIO software trigger interrupt source
based on high resolution timers.

Notice that if configfs is enabled we create sampling_frequency
attribute allowing users to change hrtimer period (1/sampling_frequency).

The IIO hrtimer trigger has a long history, this patch is based on
an older version from Marten and Lars-Peter.
Signed-off-by: NMarten Svanfeldt <marten@intuitiveaerial.com>
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NDaniel Baluta <daniel.baluta@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

A software trigger associates an IIO device trigger with a software
interrupt source (e.g: timer, sysfs). This patch adds the generic
infrastructure for handling software triggers.

Software interrupts sources are kept in a iio_trigger_types_list and
registered separately when the associated kernel module is loaded.

Software triggers can be created directly from drivers or from user
space via configfs interface.

To sum up, this dynamically creates "triggers" group to be found under
/config/iio/triggers and offers the possibility of dynamically
creating trigger types groups. The first supported trigger type is
"hrtimer" found under /config/iio/triggers/hrtimer.
Signed-off-by: NDaniel Baluta <daniel.baluta@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch creates the IIO configfs root group. The group
will appear under <mount-point>/iio/, usually /config/iio.

We introduce configfs support in IIO in order to be able to easily
create IIO objects from userspace. The first supported IIO objects
are triggers introduced with next patches.
Signed-off-by: NDaniel Baluta <daniel.baluta@intel.com>
Tested-by: NMatt Ranostay <matt.ranostay@intel>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.
Signed-off-by: NNizam Haider <nijamh@cdac.in>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.
Signed-off-by: NNizam Haider <nijamh@cdac.in>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.
Signed-off-by: NNizam Haider <nijamh@cdac.in>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Add power management for sleep as well as runtime pm.
Signed-off-by: NAdriana Reus <adriana.reus@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Keep track of the als and px enabled/disabled status in
order to enable them selectively.
Signed-off-by: NAdriana Reus <adriana.reus@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This chip supports two power modes.
1. "one-shot" mode - the chip activates and executes one complete
conversion loop and then shuts itself down. This is the default mode
chosen for raw reads.
2. "continuous" mode - the chip takes continuous measurements.

Continuous mode is more expensive power-wise but may be more reliable.
Add a property so that if preferred, the default power mode for raw
reads can be set to continuous.
Separate one-shot enabling in a separate function that will be used
depending on the chosen power mode. Also create a function for
powering the chip on and off.
Signed-off-by: NAdriana Reus <adriana.reus@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The mcp3421 is the single channel variant of the mcp342x family. Support
is straight forward, only the channels array has to be added for this
chip.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

We should provide more information in the Kconfig help for visorbus and
visorinput.
Signed-off-by: NBenjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Removed the blank line before the close brace to remove the check
detected by the checkpatch.pl

CHECK: Blank lines aren't necessary before a close brace '}'
Signed-off-by: NAnjali Menon <cse.anjalimenon@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

cksum_types_supported_server is defined in header file but not used
anywhere. Hence remove it.
Signed-off-by: NShraddha Barke <shraddha.6596@gmail.com>
Acked-by: NJames Simmons <jsimmons@infradead.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NEgor Uleyskiy <egor.ulieiskii@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NEgor Uleyskiy <egor.ulieiskii@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

* Deleted extra bracking of VME_* constants
* Deleted extra bracking of address operator
Signed-off-by: NEgor Uleyskiy <egor.ulieiskii@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Constructions that looks like
    card = kzalloc(sizeof(struct pio2_card), GFP_KERNEL);
  are changed to
    card = kzalloc(sizeof(*card), GFP_KERNEL);
Signed-off-by: NEgor Uleyskiy <egor.ulieiskii@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NEgor Uleyskiy <egor.ulieiskii@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NEgor Uleyskiy <egor.ulieiskii@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add runtime PM support for the lidar-lite module to enable low power
mode when last device requested reading is over a second.
Signed-off-by: NMatt Ranostay <mranostay@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

So this patch swaps that use out for kmalloc_array instead.

Signed-off-by Nizam Haider <nijamh@cdac.in>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

These should have been removed with the driver move out of staging
but instead were commented out.  This was missed in reviews at the
time so fixing it up now.
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The ad7780_platform_data contains just the reference voltage information.
Since the preferred way of specifying this information is using the Linux
regulator framework and the ad7780 platform_data is not used by other
users, it can be completely removed.
Signed-off-by: NDragos Bogdan <dragos.bogdan@analog.com>
Acked-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

fsl8250_handle_irq is now used by the of_serial driver, and that fails
if it is a loadable module:

ERROR: "fsl8250_handle_irq" [drivers/tty/serial/of_serial.ko] undefined!

This exports the symbol to avoid randconfig errors.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: d43b54d2 ("serial: Enable Freescale 16550 workaround on arm")
Cc: Scott Wood <scottwood@freescale.com>
Signed-off-by: NJeff Mahoney <jeffm@suse.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

8250_mid uses rational_best_approximation() function, so the
driver needs to select CONFIG_RATIONAL option.

This fixes build error when CONFIG_RATIONAL is not enabled:

drivers/built-in.o: In function `mid8250_set_termios':
8250_mid.c:(.text+0x10169a): undefined reference to `rational_best_approximation'
Reported-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The data to audit/record is in the 'from' buffer (ie., the input
read buffer).

Fixes: 72586c60 ("n_tty: Fix auditing support for cannonical mode")
Cc: stable <stable@vger.kernel.org> # 4.1+
Cc: Miloslav Trmač <mitr@redhat.com>
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Acked-by: NLaura Abbott <labbott@fedoraproject.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Since commit 7d8c70d8 ("serial: mctrl-gpio: rename init function"),
crisv32 either do not build or crash as follows.

Unable to handle kernel NULL pointer dereference
Linux 4.3.0-rc7-next-20151101 #1 Sun Nov 1 11:41:28 PST 2015
...
Call Trace: [<c0004a0e>] show_stack+0x0/0x9e
[<c004c0c0>] printk+0x0/0x2c
[<c00059d4>] show_registers+0x14a/0x1c2
[<c004c0c0>] printk+0x0/0x2c
[<c0004b52>] die_if_kernel+0x7c/0x9e
[<c0005346>] do_page_fault+0x32e/0x3e6
[<c01dc59c>] of_get_property+0x0/0x2c
[<c01e0558>] of_irq_parse_raw+0x12a/0x376
[<c01dc59c>] of_get_property+0x0/0x2c
[<c0053aca>] get_page_from_freelist+0x73e/0x856
[<c01dc59c>] of_get_property+0x0/0x2c
[<c0008912>] d_mmu_refill+0x10a/0x112
[<c01b488c>] devm_kmalloc+0x40/0x56
[<c01b47d0>] add_dr+0xc/0x1c
[<c01b4800>] devm_add_action+0x2/0x4e
[<c01abdbc>] mctrl_gpio_init_noauto+0x1c/0x76
[<c01abf9e>] mctrl_gpio_init+0x22/0x110

The function call in the etraxfs-uart driver was not renamed,
possibly due to interference with commit 7b9c5162 ("serial:
etraxfs-uart: use mctrl_gpio helpers for handling modem signals").

Fixes: 7d8c70d8 ("serial: mctrl-gpio: rename init function")
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: NNiklas Cassel <nks@flawful.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Earlycon support for Freescale lpuart should only be enabled when
console support is enabled.

Fixes: 1d59b382 ("serial: fsl_lpuart: add earlycon support")
Acked-by: NStefan Agner <stefan@agner.ch>
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>