On Motorola phones like droid 4 there is a custom CPCAP PMIC. This PMIC
has ADCs that are used for battery charging and USB PHY VBUS and ID pin
detection.

Unfortunately the only documentation for this ADC seems to be the
Motorola mapphone Linux kernel tree. I have tested that reading raw and
scaled values works, but I have not used the timed sampling that the ADC
seems to support.

Let's add a minimal support for it so we can eventually provide IIO
channels for the related battery charging and USB PHY drivers.

Cc: devicetree@vger.kernel.org
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Cc: Sebastian Reichel <sre@kernel.org>
Signed-off-by: NTony Lindgren <tony@atomide.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The driver needs to insure atomicity during frequency
changes of bus and device. The iiodev->mlock as used
was not doing that. Replace it with the drivers existing
buffer lock and introduce an auxiliary spi_write() that does
not hold the lock.
Signed-off-by: NGargi Sharma <gs051095@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Replace a comma between expression statements by a semicolon. This
changes the semantics of the code, but given the current indentation
appears to be what is intended.
A simplified version of the Coccinelle semantic patch that performs this
transformation is as follows:

// <smpl>
@r@
expression e1,e2;
@@

 e1
-,
+;
 e2;
// </smpl>
Signed-off-by: NArushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Replace a comma between expression statements by a semicolon. This
changes the semantics of the code, but given the current indentation
appears to be what is intended.
A simplified version of the Coccinelle semantic patch that performs this
transformation is as follows:

// <smpl>
@r@
expression e1,e2;
@@

 e1
-,
+;
 e2;
// </smpl>
Signed-off-by: NArushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Check for attribute_group structures that are only stored in the
event_attrs filed of iio_info structure. As the event_attrs field of
iio_info structures is constant, so these attribute_group structures can
also be declared constant.
Done using coccinelle:

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct attribute_group i@p = {...};

@ok1@
identifier r1.i;
position p;
struct iio_info x;
@@
x.event_attrs=&i@p;

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
static
+const
struct attribute_group i={...};

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct attribute_group i;

File size before:
   text    data     bss     dec     hex filename
  26051     464       0   26515    6793 drivers/iio/adc/ad799x.o

File size after:
   text	   data	    bss	    dec	    hex	filename
  26115	    400	      0	  26515	   6793	drivers/iio/adc/ad799x.o
Signed-off-by: Nsimran singhal <singhalsimran0@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Check for attribute_group structures that are only stored in the
event_attrs filed of iio_info structure. As the event_attrs field of
iio_info structures is constant, so these attribute_group structures can
also be declared constant. Done using coccinelle:

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct attribute_group i@p = {...};

@ok1@
identifier r1.i;
position p;
struct iio_info x;
@@
x.event_attrs=&i@p;

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
static
+const
struct attribute_group i={...};

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct attribute_group i;

File size before:
   text    data     bss     dec     hex filename
  36951     448       0   37399    9217 drivers/iio/adc/max1363.o

File size after:
   text	   data	    bss	    dec	    hex	filename
  37015	    384	      0	  37399	   9217	drivers/iio/adc/max1363.o
Signed-off-by: Nsimran singhal <singhalsimran0@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Check for attribute_group structures that are only stored in the
event_attrs filed of iio_info structure. As the event_attrs field of
iio_info structures is constant, so these attribute_group structures can
also be declared constant. Done using coccinelle:

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct attribute_group i@p = {...};

@ok1@
identifier r1.i;
position p;
struct iio_info x;
@@
x.event_attrs=&i@p;

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
static
+const
struct attribute_group i={...};

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct attribute_group i;

File size before:
   text    data     bss     dec     hex filename
   3046     360       0    3406     d4e drivers/iio/dac/ad5504.o

File size after:
   text	   data	    bss	    dec	    hex	filename
   3110	    296	      0	   3406	    d4e	drivers/iio/dac/ad5504.o
Signed-off-by: Nsimran singhal <singhalsimran0@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Symbolic permissions 'S_IWUSR | S_IRUGO' are not preferred. Consider using
octal permissions '0644'. Found running checkpatch.
Signed-off-by: NOlivier Leveque <o_leveque@orange.fr>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Fixes three checkpatch warnings due to braces used when single
statements are sufficient.
Signed-off-by: NMark Stenglein <mark@stengle.in>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Standard deviation is calculated as the square root of the variance
where variance is the mean of sample_sum and length. Correct the
computation of statP->stddev in accordance to the proper calculation.

Fixes: 3c97c08b ("staging: iio: add TAOS tsl2x7x driver")
Reported-by: NAbhiram Balasubramanian <abhiram@cs.utah.edu>
Signed-off-by: NEva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Environmental humidity sensor is a hid defined sensor,
it shows raw humidity measurement of air.

More information can be found in:
http://www.usb.org/developers/hidpage/HUTRR39b.pdf

According to IIO ABI definition, humidityrelative data output unit is
milli percent. Add the unit convert from percent to milli percent.
Signed-off-by: NSong Hongyan <hongyan.song@intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Scale value include two parts: unit conversion and exponent conversion.
Add gravity unit convert table to fix gravity sensor scale value not
right issue.
Signed-off-by: NSong Hongyan <hongyan.song@intel.com>
Acked-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds support for STMicro VL6180 - ALS, range and proximity sensor. Sensor is capable of measuring the light
intensity as well as object distance using TOF (Time of Flight) technology.
Signed-off-by: NManivannan Sadhasivam <manivannanece23@gmail.com>
Signed-off-by: NPeter Meerwald-Stadler <pmeerw@pmeerw.net>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Remove the extra parenthesis remove the checkpatch issue.
Signed-off-by: NArushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Use resourced managed function devm_iio_triggered_buffer_setup
to make error path simpler and be able to get rid of the remove
function.
Signed-off-by: NEnric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch adds calibration for the Meson SAR ADC.
Points 25% vref and 75% vref are used for calibration.
It uses a simple linear calibration function: SCALE * val + BIAS

Successfully tested on a Odroid C2.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Tested-by: NMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: NMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

adis16203_read_raw does not need lock for IIO_CHAN_INFO_CALIBBIAS
since adis_read_reg_16 is already atomic and nothing else needs to be
protected.
Signed-off-by: NGargi Sharma <gs051095@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This was reported by checkpatch.pl:
CHECK: Alignment should match open parenthesis
Signed-off-by: NNarcisa Ana Maria Vasile <narcisaanamaria12@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This was reported by checkpatch.pl:
CHECK: Please use a blank line after function/struct/union/enum
declarations
Signed-off-by: NNarcisa Ana Maria Vasile <narcisaanamaria12@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This was reported by checkpatch.pl
Signed-off-by: NNarcisa Ana Maria Vasile <narcisaanamaria12@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The IIO subsystem is redefining iio_dev->mlock to be used by
the IIO core only for protecting device operating mode changes.
ie. Changes between INDIO_DIRECT_MODE, INDIO_BUFFER_* modes.

In this driver, mlock was being used to protect hardware state
changes.  Replace it with a lock in the devices global data.
Signed-off-by: NArushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch removes trailing whitespaces in order to follow the Linux
coding style.
Signed-off-by: Nsimran singhal <singhalsimran0@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Alphabetize and separate kernel and subsystem headers.
Signed-off-by: Nsimran singhal <singhalsimran0@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

This patch replaces bit shifting on 1 with the BIT(x) macro.
This was done with coccinelle:
@@
constant c;
@@

-1 << c
+BIT(c)
Signed-off-by: NArushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

The IIO subsystem is redefining iio_dev->mlock to be used by
the IIO core only for protecting device operating mode changes.
ie. Changes between INDIO_DIRECT_MODE, INDIO_BUFFER_* modes.

In this driver, mlock was being used to protect hardware state changes.

In the driver, buf_lock protects both the adis16060_spi_write() and
adis16060_spi_read() functions and both are always called in
pair. First write, then read. Refactor the code to have
one single function adis16060_spi_write_than_read() protected by
the buf_lock.  This removes the need for additional locking via
mlock, so this locking is removed.
Signed-off-by: Nsimran singhal <singhalsimran0@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Merge tag 'iio-for-4.12b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

2nd set of new device support, features and cleanups for IIO in the 4.12 cycle

A good collection of outreachy related patches in here - mostly staging
driver cleanup. Also a fair number of patches added explicit OF device ID
tables for i2c drivers - a precursor to dropping (eventually) the implicit
probing.

New Device Support
* Allwinner SoC ADC.
  - So far covers the sun4i-a10, sun5i-a13 and sun6i-a31 general purpose ADCs,
  including thermal side of things.
  This missed the last cycle due to my incompetence, so good to get in now,
  particularly as various patches dependent on it are appearing.
* ltc2632
  - new driver supporting ltc2632-l12, ltc2632-l10, ltc2632-l8, ltc2632-h12,
    ltc-2632-h10, ltc-2632-h8 dacs

Cleanups
* Documentation
  - drop a broken reference to i2c/trivial-devices
* ad2s1200
  - drop & from function pointers for consistency.
* ad2s1210
  - formatting fixes.
* ad7152
  - octal permissions instead of symbolic.
  - drop & from function pointers for consistent usage.
* ad7192
  - drop & from function pointers for consistent usage.
* ad7280
  - replace core mlock usage with a local lock as mlock is intended only to
  protect the current device state (direct reads, or triggered and buffered)
* ad7746
  - drop & from function pointers for consistent usage.
  - replace core mlock usage with a local lock as mlock is intended only to
  protect the current device state (direct reads, or triggered and buffered)
* ad7754
  - move contents of header file into source file as not used anywhere else.
* ad7759
  - move contents of header file into source file as not used anywhere else.
* ad7780
  - drop & from function pointers for consistent usage.
* ad7832
  - replace core mlock usage with a local lock as mlock is intended only to
  protect the current device state (direct reads, or triggered and buffered)
* ad9834
  - replace core mlock usage with a local lock as mlock is intended only to
  protect the current device state (direct reads, or triggered and buffered)
  - drop an unnecessary goto in favour of direct return.
* adis16060
  - drop & from function pointers as inconsistent.
* adis16201
  - drop a local mutex as the adis core already protects everything necessary.
  - drop & from function pointers for consistent usage.
* adis16203
  - drop & from function pointers for consistent usage.
* adis16209
  - drop a local mutex as the adis core already protects everything necessary.
  - use an enum for scan index giving slightly nicer code.
  - drop & from function pointers for consistent usage.
* adis16240
  - drop a local mutex as the adis core already protects everything necessary.
  - use an enum for scan index giving slightly nicer code.
  - drop & from function pointers for consistent usage.
* apds9960
  - add OF device ID table.
* bma180
  - add OF device ID table.
  - prefer unsigned int to bare use of unsigned.
* bmc150_magn
  - add OF device ID table.
* hmp03
  - add OF device ID table.
* ina2xx
  - add OF device ID table.
* itg3200
  - add OF device ID table.
* mag3110
  - add OF device ID table.
* max11100
  - remove .owner field as it is set by the spi core.
* max5821
  - add .of_match_table set to the ID table which was present but not used.
* mcp4725
  - add OF device ID table.
* mlx96014
  - add OF device ID table.
* mma7455
  - add OF device ID table.
* mma7660
  - add OF device ID table.
* mpl3115
  - add OF device ID table.
* mpu6050
  - add OF device ID table.
* pc104
  - mask pc104 drivers behind a global pc104 config option.
* ti-ads1015
  - add OF device ID table.
* tsl2563
  - add OF device ID table.
* us5182d
  - add OF device ID table.

Add support for Linear Technology LTC2632 (SPI) family of·
dual 12- 10-, and 8-bits output DACs.
Signed-off-by: NMaxime Roussin-Belanger <maxime.roussinbelanger@gmail.com>
Signed-off-by: NJean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

Driver uses multiple identifier names for the same task (retval, ret,
rc). It would be easier to read the code if a single task is
identified with a single name. 'ret' is the most common return value
identifier name found in the kernel tree, following the principle of
least surprise using 'ret' is a decent choice.

Rename rc -> ret
Rename retval -> ret
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Comparison, equal to zero, is redundant

'if (foo == 0)'  is equal to  'if (!foo)'

Typical kernel coding style is to use the shorter form.

Remove unnecessary zero comparison.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Comparison, does not equal zero, is redundant

'if (foo != 0)'  is equal to  'if (foo)'

Typical kernel coding style is to use the shorter form.

Remove unnecessary non-zero comparison.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Driver uses different label forms for similar purposes. It would be
more clear if single use case has uniform label. 'out' is generic and
adds no meaning to label.

Documentation/process/coding-style.rst:
Choose label names which say what the goto does or why the goto
exists.

Rename labels so as to better describe what they do. If an execution
path only exists for the label on an error, prefix the label with
'err_'. If a non-error execution path exist do not use prefix.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Function uses goto label with no clean up code. In this case we
should just return directly.

Remove goto statement, return directly on error.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Checkpatch emits CHECK: multiple assignments should be avoided.

Move multiple line assignment to individual lines.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Checkpatch emits CHECK: Unbalanced braces around else
statement. Statements in question are single statements so we do not
need braces. Checkpatch also warns about multiple line dereference for
this code.

Fix if/else/else if statement use of braces. Fix function argument layout
at the same time since it is the same statement.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Checkpatch emits CHECK: Alignment should match open parenthesis.

Fix alignment to open parenthesis in line with kernel coding style.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Checkpatch emits CHECK: No space is necessary after a cast.

Remove unnecessary space after cast.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Checkpatch emits CHECK: Please use a blank line after
function/struct/union/enum declarations.

Add blank line after function definition.
Signed-off-by: NTobin C. Harding <me@tobin.cc>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Regarding to the header the driver is licensed under BSD and GPL.
Signed-off-by: NStefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Free memory mapping, if vpfe_ipipe_init is not successful.
Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

New variables are added to make the code more readable.
Signed-off-by: NArushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>