Used C89 instead of C99 Comment and removed C99 comments performing prints only.
Problem found using checkpatch.pl
ERROR: do not use C99 // comments
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix the checkpatch.pl WARNING: line over 80 characters
Signed-off-by: Charlie Wong Super <1213charlie@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

I don't know if "hdr->payload_length;" can really be negative, but if so
then we shouldn't allow it.  Do the comparison as an unsigned.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

hdr->ioc_len is a user controlled u32 so the addition can overflow,
especially on 32 bit systems.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Remove an unneeded return statement in this file
Signed-off-by: Achille Aknin <achille.aknin@ens.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

remove space between function names and open parentheses as reported by
checkpatch.pl.
Signed-off-by: Auguste Olivry <auguste.olivry@ens.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Replace two occurrences of "+1" with simply "1".
Signed-off-by: Luca Wehrstedt <luca.wehrstedt@ens.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Power down device when an error occurs  in order to avoid wasting
power. Move powerdown function up to be seen by the new call and
align parameters for the ltr501_write_contr() call.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix the following checkpatch warning:
WARNING: Prefer [subsystem eg: netdev]_err([subsystem]dev, ...
then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
Signed-off-by: Ioana Ciornei <ciorneiioana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch marks functions llog_cat_set_first_idx and cat_cancel_cb
static as these are used only within this file. Also since cat_cancel_cb
is made static do not export it.

This eliminates the following sparse warning:
warning: symbol * was not declared. Should it be static?
Signed-off-by: Darshana Padmadas <darshanapadmadas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch makes functions mgc_logname2resid, mgc_set_info_async
and mgc_init static as these are only used internally.

This also eliminates sparse warnings of the type:
warning: symbol * was not declared. Should it be static?
Signed-off-by: Darshana Padmadas <darshanapadmadas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch includes the header file mdc_internal.h that declares the
function lprocfs_mdc_init_vars.

This also eliminates the sparse warning:
warning: symbol 'lprocfs_mdc_init_vars' was not declared. Should it be static?
Signed-off-by: Darshana Padmadas <darshanapadmadas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch includes the header lustre/include/lclient.h that declares
the functions lov_lsm_put and lov_read_and_clear_async_rc defined in
lov_object.c.

This eliminates warnings reported by sparse:
warning: symbol was not declared. Should it be static?
Signed-off-by: Darshana Padmadas <darshanapadmadas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch includes the header file lmv_internal.h that declares
the function lprocfs_lmv_init_vars defined in lproc_lmv.c.

This eliminates the sparse warning:
warning: symbol 'lprocfs_lmv_init_vars' was not declared. Should it be static?
Signed-off-by: Darshana Padmadas <darshanapadmadas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The function obd_proc_version_seq_show is only used in this
file, so make it static.

This eliminates the following sparse warning:
warning: symbol 'obd_proc_version_seq_show' was not declared. Should it be static?
Signed-off-by: Darshana Padmadas <darshanapadmadas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Sparse reported the following warnings:
warning: symbol 'lstcon_console_init' was not declared. Should it be static?
warning: symbol 'lstcon_console_fini' was not declared. Should it be static?
warning: symbol 'lstcon_ioctl_entry' was not declared. Should it be static?

However since these functions are used in other files,
they cannot be made static, so add protoypes for the same in console.h.
Signed-off-by: Darshana Padmadas <darshanapadmadas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Removes variable comparison with 0 by using !. Done using following
coccinelle script.

@ disable is_zero,isnt_zero @
expression *E;
expression E1,f;
@@

E = f(...)
<...
(
- E == 0
+ !E
|
- E != 0
+ E
|
- 0 == E
+ !E
|
- 0 != E
+ E
)
...>
?E = E1

@ disable is_zero,isnt_zero @
expression *E;
@@

(
  E ==
- 0
+ NULL
|
  E !=
- 0
+ NULL
|
- 0
+ NULL
  == E
|
- 0
+ NULL
  != E
)
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Delete duplicated argument to | for the state argument in
the _clr_fwstate_() function call as it is redundant.
Detected with coccinelle.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Use memdup_user() to avoid its duplicated implementation and simplify
code. memdup_user() uses GFP_KERNEL instead of GFP_ATOMIC,
which is valid because copy_from_user() might sleep and it's useless
to make the allocation atomic. Found with coccinelle.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Place driver on standby mode on error in order to prevent wasting
power. Move standby function above to be seen by the new call.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes explicit NULL comparison and writes it in its
equivalent shorter form. Done with coccinelle.

@replace_rule@
expression e;
@@

-e == NULL
+ !e
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes explicit NULL comparison and writes it in its
shorter form. Detected with coccinelle.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes explicit NULL comparison and replaces it with
its shorter form. Detected with coccinelle.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes explicit NULL comparison and replaces it
with its shorter form. Detected with coccinelle.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes explicit NULL comparison and replaces it with
its shorter form. Detected with coccinelle.

@replace_rule@
expression e;
@@

-e == NULL
+ !e
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes explicit NULL comparison and writes it in its
simpler form. Done with coccinelle:

@replace_rule@
expression e;
@@

-e == NULL
+ !e
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Remove explicit NULL comparison and write it in its simpler form.
Replacement done with coccinelle:

@replace_rule@
expression e;
@@

-e == NULL
+ !e
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch checks if an error occurred on probe and stops the
device in order to avoid wasting power.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge tag 'iio-for-4.1b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of new devices, functionality and cleanup for IIO in the 4.1 cycle.

New Functionality
* Watermark logic for buffers.  Allows for blocking reads to block until
  their requested amount is available - previously they only blocked until
  a single scan of data was available.  Also allows for polling for a
  watermark amount of data to be available.  This feature was first proposed
  some time ago to good responses, but not taken further by the original author
  Octavian has picked up the gauntlet and taken it through
  to merging (along with the hardware fifo support that follows).
* New approach to hardware fifo handling - in particular handling the
  interaction of a hardware fifo feeding into a software fifo and their
  watershed events.  We don't have every possible case well covered yet,
  but this is certainly a good, flexible starting point.  This will replace
  the previous approach used in ancient drivers (sca3000) where we just
  exposed the hardware buffer directly to userspace.  Very few pieces of
  hardware have sufficiently long buffers for that to be an adequate solution.
* bmc150_accel - hardware fifo support.
* mlx90614 - support dual IR sensor devices + some refactoring to clean up the
  code and allow some other functionality currently under review.
* L3GD20H gyroscope support added to the st_gyro driver.
* lis3lv02d accelerometer added to the st_gyro driver. Note this part is
  also supported by the older lis3 driver under misc.  A lengthy discussion
  took place and concluded that holding parts out on the basis that whole
  driver would be subsumed into this one was counter productive.  Better
  to add part support and add additional features as people need them.
  Basically there was not advantage in not merging the support.
* max517 driver gains support for MAX520 and MAX521 DACs.

Documentation
* 3.20 -> 4.0 renaming for recent docs. Whilst technically a fix, I think
  people will cope until the next merge merge window.
* An ABI typo hat -> What:  More ABIs should have hats.
* Document in_rot_offset, illuminance_raw and illuminance_scale.

Cleanups
* Fix a scale extraction bug in generic_buffer.c example.
* Constify a load of device tree related structures.

Kernel version for new ABI in 4.0 has been documented
as 3.20, since the changes have been merged before the kernel
version number change.

Change kernel version from 3.20 to 4.0.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Signed-off-by: Martin Kepplinger <martink@posteo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

The model is detected by reading the EEPROM configuration during
probing.
Signed-off-by: Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Add symbols for all accessible RAM and EEPROM registers, as well as the
sleep command and timings defined in the datasheet.
Signed-off-by: Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

We only advertise hardware fifo support if the I2C bus supports full
I2C or smbus I2C block data reads since it is mandatory to read the
full frame in one read (otherwise the rest of the frame is discarded).

The hardware fifo is enabled only when triggers are not active because:

(a) when using the any-motion trigger the user expects to see samples
based on ROC events, but the fifo stores samples based on the sample
frequency

(b) the data-ready trigger is waking the CPU for for every sample, so
using the hardware fifo does not have any benefit
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Some devices have hardware buffers that can store a number of samples
for later consumption. Hardware usually provides interrupts to notify
the processor when the FIFO is full or when it has reached a certain
watermark level. This helps with reducing the number of interrupts to
the host processor and thus it helps decreasing the power consumption.

This patch enables usage of hardware FIFOs for IIO devices in
conjunction with software device buffers. When the hardware FIFO is
enabled the samples are stored in the hardware FIFO. The samples are
later flushed to the device software buffer when the number of entries
in the hardware FIFO reaches the hardware watermark or when a flush
operation is triggered by the user when doing a non-blocking read
on an empty software device buffer.

In order to implement hardware FIFO support the device drivers must
implement the following new operations: setting and getting the
hardware FIFO watermark level, flushing the hardware FIFO to the
software device buffer. The device must also expose information about
the hardware FIFO such it's minimum and maximum watermark and if
necessary a list of supported watermark values. Finally, the device
driver must activate the hardware FIFO when the device buffer is
enabled, if the current device settings allows it.

The software device buffer watermark is passed by the IIO core to the
device driver as a hint for the hardware FIFO watermark. The device
driver can adjust this value to allow for hardware limitations (such
as capping it to the maximum hardware watermark or adjust it to a
value that is supported by the hardware). It can also disable the
hardware watermark (and implicitly the hardware FIFO) it this value is
below the minimum hardware watermark.

Since a driver may support hardware FIFO only when not in triggered
buffer mode (due to different semantics of hardware FIFO sampling and
triggered sampling) this patch changes the IIO core code to allow
falling back to non-triggered buffered mode if no trigger is enabled.
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Currently the IIO buffer blocking read only wait until at least one
data element is available.
This patch makes the reader sleep until enough data is collected before
returning to userspace. This should limit the read() calls count when
trying to get data in batches.

Co-author: Yannick Bedhomme <yannick.bedhomme@mobile-devices.fr>
Signed-off-by: Josselin Costanzi <josselin.costanzi@mobile-devices.fr>
[rebased and remove buffer timeout]
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

It can be used exactly like L3GD20 but it has a different WhoAmI
register value.
Signed-off-by: Robert Dolca <robert.dolca@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

When using generic_buffer to read data, the scale is not properly
detected for scale shared by type. This is caused by a problem
with the generation of generic name out of the full name.
E.g.: for current->name in_accel_z, the extracted generic name
is "in" (when it should be "in_accel"). This is used in generic_buffer
to generate scale and offset paths (in_accel_scale).

Consider the in_ or out_ prefix when extracting the generic name
from the full name.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

This patch adds ABI documentation entries for in_rot_offset.
At least one user for these is present that is the  HID Sensors Driver.
Signed-off-by: Haneen Mohammed <hamohammed.sa@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

MAX520 and MAX521 are protocol-compatible with the already supported
chips, just have more channels.
Signed-off-by: Antonio Fiol <antonio@fiol.es>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>