Commit graph

109 commits

Author SHA1 Message Date
Dan Carpenter
e59b9afecf iio: double unlock on error path
We should be holding the mutex when we goto error_free_chans.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-12 20:00:20 +01:00
Gerard Snitselaar
21fa54e401 iio: dac: ad5064: fix section mismatch in ad5064_init() in linux-next
ad5064_init() calls ad5064_spi_unregister_driver() which is annotated
__exit.

Signed-off-by: Gerard Snitselaar <dev@snitselaar.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-12 20:00:08 +01:00
Lars-Peter Clausen
9660ac704e iio: ad5064: Move bus write callbacks to #if protected sections
Move the SPI and I2C specific write callbacks to the respective
"#if IS_ENABLED(CONFIG_SPI_MASTER)" and "#if IS_ENABLED(CONFIG_I2C)"
protected sections of the code.

This fixes the following warning which occurs if CONFIG_I2C is not set:
	drivers/iio/dac/ad5064.c: In function ‘ad5064_i2c_write’:
	drivers/iio/dac/ad5064.c:132: error: implicit declaration of function ‘i2c_master_send’

And the follwing warning which occurs when CONFIG_SPI_MASTER is not set:
	drivers/iio/dac/ad5064.c:137: warning: ‘ad5064_spi_write’ defined but not used

Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-12 17:57:16 +01:00
Peter Meerwald
bbdb822c4c iio: add adjd_s311 I2C digital color sensor driver
sensor has 4 channels (10-bit each, R/G/B and clear), sensitivity
and gain is controlled in the driver by ext_info integration_time
and CHAN_INFO_HARDWAREGAIN

driver supports triggered buffer and IIO_CHAN_INFO_RAW to get the
sensor data

v5: address comments by Jonathan Cameron
* use macro for channel declaration
* get timestamp right before measurement
* cleanups

v4: address comments by Lars-Peter Clausen
* make sure trigger handler is exited with iio_trigger_notify_done()
  and IRQ_HANDLED
* kfree()/kalloc() -> krealloc()

v3:
* fix warnings

v2: address comments by Lars-Peter Clausen
* buffer allocation now in update_scan_mode instead of in trigger
  handler
* simplify trigger code (assume active_scan_mask is not empty, use
  for_each_set_bit, use iio_push_to_buffer)
* reorder entry in Makefile and Kconfig
* fix remove

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-12 17:45:34 +01:00
Jon Brenner
21cd1fab05 IIO channel type and modifiers for CCT and RGBC data
Add iio channel type and modifiers for Correlated Color Temperature (CCT)
and RGBC (red/green/blue/clear) data.
Add CCT and RGBC descriptions to documentation.

Changes:
Revised/condensed RGBC descriptions.

Merge and trivial fix done by Jonathan Cameron.

Signed-off-by: Jon Brenner <jbrenner@taosinc.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-10 18:49:26 +01:00
Greg Kroah-Hartman
f12db36d3f Mixed back of updates and trivial examples fixes.
Nothing terribly interesting in this one.
 
 8 July 2012
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Merge tag 'togreg_8_7_2012' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Mixed back of updates and trivial examples fixes.
Nothing terribly interesting in this one.

8 July 2012
2012-07-09 13:39:08 -07:00
Lars-Peter Clausen
8163663205 iio: Introduce iio_validate_scan_mask_onehot
Add a helper function for validating a scan mask for devices where exactly one
channel must be selected during sampling. This is a common case among devices
which have scan mask restrictions so it makes sense to provide this function in
the core.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-09 18:18:15 +01:00
Lars-Peter Clausen
939546d1a9 iio: Add callback to check whether a scan mask is valid
This is useful for cases where the number of valid scan masks grows
exponentially, but it is rather easy to check whether a mask is valid or not
programmatically.

An example of such a case is a device with multiple ADCs where each ADC has a
upstream MUX, which allows to select from a number of physical channels.

  +-------+   +-------+
  |       |   |       | --- Channel 1
  | ADC 1 |---| MUX 1 | ---   ...
  |       |   |       | --- Channel M
  +-------+   +-------+

     .            .            .
     .            .            .
     .            .            .

  +-------+   +-------+
  |       |   |       | --- Channel M * N + 1
  | ADC N |---| MUX N | ---       ...
  |       |   |       | --- Channel M * N + M
  +-------+   +-------+

The number of necessary scan masks for this case is (M+1)**N - 1, on the other
hand it is easy to check whether subsets for each ADC of the scanmask have only
one bit set.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-09 18:18:15 +01:00
Jonathan Cameron
7b7627410e iio: Fix inkern remove incorrect put of device
The device_get is after this point so on error we should not be
removing it.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-08 20:02:31 +01:00
Sascha Hauer
46b24311cc iio: Fix unitialized use of list
The dev_attr list is initialized in __iio_add_event_config_attrs which
is called only when indio_dev->channels is true. Nevertheless the list
is used unconditionally later in iio_device_register_eventset which
results in a NULL pointer exception. To fix this unconditionally
initialize the list in iio_device_register_eventset.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-08 20:02:24 +01:00
Lars-Peter Clausen
e1dc7bee74 iio: iio_buffer_register: Use correct channel when calculating masklength
The channel set assigned to the iio device is not necessarily the same has the
channel set passed to iio_buffer_register. So to avoid possible complications
always work with the channel set pass to iio_buffer_register and ignore the
channel set assigned to the iio device.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-08 20:02:23 +01:00
Lars-Peter Clausen
6d459aa011 iio:trigger: Register sysfs file statically
The name sysfs attribute is the same for all triggers, so there is no need to
register them dynamically at runtime. Create a attribute group for it and set it
up for the bus attribute group. This also avoids a possible race condition
where the uevent for the device is sent before the name sysfs attribute has been
added.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-08 10:39:58 +01:00
Peter Meerwald
034bd7b5d9 iio: fix spelling of detach in static func
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-07 16:52:22 +01:00
Jonathan Cameron
cf82cb8128 IIO: Add a modifier for x^2+y^2+z^2
There will probably be a number of such modifiers eventually but
this one is used in the adis16240 accelerometer driver.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-06-30 10:15:28 +01:00
Jonathan Cameron
8f5879b20b IIO: Add a modifier for sqrt(x^2+y^2)
There will probably be a number of such modifiers eventually but
this one is used in the adis16204 accelerometer driver.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-06-30 10:15:22 +01:00
Jonathan Cameron
314be14bb8 iio: Rename _st_ functions to loose the bit that meant the staging version.
These were originally introduced when the plan was to have parallel
IIO cores in and out of staging with a slow move between them.
Now we have reached the point where the whole core has moved,
they need clearing up!

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-06-30 10:15:12 +01:00
Lars-Peter Clausen
6a17a0768f iio:dac:ad5064: Add support for the ad5629r and ad5669r
The ad5629r and ad5669r are the I2C variants of the ad5628 and ad5668. Since the
ad5064 driver currently only supports SPI based devices the major part of this
patch focuses on adding support for I2C based devices. Adding support for the
actual parts boils down to adding entries for them to the device id table.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-06-30 10:15:09 +01:00
Lars-Peter Clausen
8ec4cf5303 iio:adc: Add AD7265/AD7266 support
This patch adds support for the Analog Devices AD7265 and AD7266
Analog-to-Digital converters.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-06-30 10:15:07 +01:00
Lars-Peter Clausen
779c0c4619 iio:dac:ad5446: Add support for the AD5450/51/52/53
This patch adds support for the Analog Devices AD5450/51/52/53 Digital-to-Analog
converters.

The AD5452 and AD5453 are software compatible to the existing AD5444 and AD5446.
The AD5450 and AD5451 are similar but have a smaller resolution.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-26 14:57:30 -07:00
Lars-Peter Clausen
90e6dc7c27 iio:adc:at91: Relase mutex on error path in at91_adc_read_raw
This issue was reported by the mini_lock.cocci coccinelle semantic patch.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-26 14:57:30 -07:00
Greg Kroah-Hartman
bcc66c0b88 Merge 3.5-rc4 into staging-next
This picks up the staging changes made in 3.5-rc4 so that everyone can sync up
properly.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-25 09:31:00 -07:00
Lars-Peter Clausen
971ff1db41 iio:trigger: Use to_iio_trigger() instead of dev_get_drvdata()
Use to_iio_trigger(dev) instead of dev_get_drvdata(dev). Both will return the
trigger which belongs to the device, but the the first on is a bit more
lightweight.

Since this is the last location where we used dev_get_drvdata() for retrieving
the trigger there is no need anymore to assign the the trigger to the devices
drvdata, so we can remove that as well.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-22 21:08:11 -07:00
Peter Meerwald
62a1efb9f8 iio: add vcnl4000 combined ALS and proximity sensor
minimal driver, no IR current control and proximity/event
handling yet

v5:
* checkpatch warnings
* increase msleep() to 20 ms when waiting for data ready as
  measurement/conversion can take up to 100 ms, 1 ms is too short

v4 (address comments by Jonathan Cameron)
* remove SENSORS_ prefix in Kconfig
* change from IIO_INTENSITY to IIO_LIGHT
* move from staging

v3 (address comments by Shubhrajyoti Datta)
* cleanup Kconfig entry
* call I2C read/write functions directly

v2 (address comments by Lars-Peter Clausen and Jonathan Cameron)
* unify code for reading PS and AL data into
  parameterized _measure() function
* limit wait for data to become ready within 20 tries
* drop IIO_LIGHT channel, add SCALE to IIO_INTENSITY
* drop extra string arguments used for logging purpose only

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-20 16:12:46 -07:00
Lars-Peter Clausen
90032e4e9c iio:adc:at91: Use new triggered buffer setup helper
Use the new triggered buffer setup helper function to allocate and register
buffer and pollfunc.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-18 17:26:09 -07:00
Lars-Peter Clausen
23f2d735a9 iio: Add helper function for initializing triggered buffers
Add a helper function for executing the common tasks which are usually involved
in setting up a simple software ringbuffer. It will allocate the buffer,
allocate the pollfunc and register the buffer.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-18 17:26:09 -07:00
Lars-Peter Clausen
f5b81ddd12 iio: iio_buffer_register: Skip channels with negative scan index
It is not always the case that all channels can be used in buffered mode. This
patch allows channels, which can not be used in buffered mode, to set their scan
index to a negative number, which will cause iio_buffer_register to ignore the
channel.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-18 17:26:09 -07:00
Lars-Peter Clausen
aff1eb4e3d iio: buffer: Fix NULL pointer deref caused by empty scan mask
iio_scan_mask_match() returns NULL if the passed in scan mask is empty. This
will happen if no channel has been selected and buffer is enabled.
iio_sw_buffer_preenable() will assign NULL to indio_dev->active_scan_mask in
this case. As a result iio_update_demux() will cause a NULL pointer deref,
because it expects active_scan_mask to be non-NULL.

Since it does not make much sense to start data capture if there is no data to
capture this patch updates the code to fail gracefully in iio_scan_mask_match()
instead of crashing the kernel.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-15 14:39:19 -07:00
Axel Lin
d03fcfe626 iio: dac: Convert ad5380 to devm_regmap_* APIs
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-15 14:36:25 -07:00
Jiri Kosina
a529ae4ba3 iio: drop wrong reference from Kconfig
The documentation lives in drivers/staging/iio/Documentation, but
according to Jonathan it's obsolete and needs fixing.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-14 17:28:46 -07:00
Greg Kroah-Hartman
89a86a2da3 Merge branch 'staging-linus' into staging-next
We need this for the pstore fixes that went into the staging-linus branch, so
that things apply properly for the pstore/android code merge.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-13 16:57:09 -07:00
Michael Hennerich
011c10c351 iio: ad9523: Fix argument type mismatch
drivers/iio/frequency/ad9523.c:378 ad9523_vco_out_map()
	 warn: value 2 can't fit into 1 'out'

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-12 14:50:51 -07:00
Peter Meerwald
cf35ad61ac iio: add mcp4725 I2C DAC driver
v5:
* fix warnings (Jonathan Cameron)

v4:
* remove unused indio_dev pointer in mcp4725_data (Jonathan Cameron)
* use u16 instead of unsigned short in mcp4725_data (Jonathan Cameron)
* #include mcp4725.h from linux/iio/dac/

v3:
* move from staging to drivers/iio
* switch to chan_spec
* dev_get_drvdata() -> dev_to_iio_dev()
* annotate probe() and remove() with __devinit and __devexit

v2 (based on comments from Jonathan Cameron and Lars-Peter Clausen):
* did NOT switch to chan_spec yet
* rebase to staging-next tree, update iio header locations
* dropped dac.h #include, not needed
* strict_strtol() -> kstrtol()
* call iio_device_unregister() in remove()
* everything in one patch

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-12 14:50:51 -07:00
Dan Carpenter
1a135d1ab5 iio: frequency: adf4350: using an uninitialized variable
GCC complains that we use an uninitialized variable if the user passes
an invalid parameter to adf4350_read().  I decided that we should return
-EINVAL instead in that case.

However, when I looked up at adf4350_write() it returned -ENODEV for
that condition.  In the end, I decided the -EINVAL was the right thing
and I change adf4350_write() to match.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-12 14:48:39 -07:00
Dan Carpenter
e86ee142a2 iio: frequency: adf4350: fix an initialization
Sparse complains about this:
drivers/iio/frequency/adf4350.c:58:29: warning: Initializer entry defined twice
drivers/iio/frequency/adf4350.c:59:10:   also defined here

It looks like '|' was intended here instead of ','.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-12 14:47:03 -07:00
Peter Meerwald
f9eb89e97d iio: max517: mark probe() and remove() with __devinit and __devexit
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Roland Stigge <stigge@antcom.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-12 14:45:16 -07:00
Peter Meerwald
227d5e0040 iio: remove indio_dev pointer from max517_data
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Roland Stigge <stigge@antcom.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-12 14:45:16 -07:00
Dan Carpenter
17c88eb6a0 iio: frequency: ad9523: unlock on error in ad9523_reg_access()
There was a return path which got missed accidentally.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-12 14:45:16 -07:00
Lars-Peter Clausen
74dcd439bf iio: iio_enum_available_read: Prevent possible buffer overflow
Use scnprint instead of snprintf, because snprintf returns the number of bytes
that would have been written to the buffer if there was enough space, and as a
result writing to buf[len-1] might cause a access beyond the buffers limits.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-07 14:26:29 +09:00
Michael Hennerich
a21e6bfeb4 iio: adf4350: fix compiler warning [-Wuninitialized]
drivers/iio/frequency/adf4350.c:316:32: warning: ‘val’ may be used uninitialized in this function
[-Wuninitialized]

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-07 14:26:28 +09:00
Lars-Peter Clausen
dbdc025bb2 staging:iio: Move DAC drivers out of staging
The IIO DAC drivers are in a reasonably good shape. They all make use of channel
spec and non of them provides non-documented sysfs attributes. Code style should
be OK as well, both checkpatch and coccicheck only report trivial issues.

So lets move the whole folder out of staging.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-05 14:02:25 +09:00
Lars-Peter Clausen
5212cc8a9d iio: Add helper functions for enum style channel attributes
We often have the case were we do have a enum style channel attribute. These
attributes have in common that they are a list of string values which usually
map in a 1-to-1 fashion to integer values.

This patch implements some common helper code for implementing enum style
channel attributes using extended channel attributes. The helper functions take
care of converting between the string and integer values, as well providing a
function for "_available" attributes which list all available enum items.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-05 13:47:29 +09:00
Lars-Peter Clausen
1875ffd218 iio:inkern: Use iio_device_{get,put}
Use iio_device_get and iio_device_put instead of open-coding it.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-04 21:21:29 -07:00
Michael Hennerich
e31166f0fd iio: frequency: New driver for Analog Devices ADF4350/ADF4351 Wideband Synthesizers
Changes since V1:
Apply Jonathan's review feedback:
    Introduce and use IIO_ALTVOLTAGE.
    Fix up comments and documentation.
    Remove dead code.
    Reorder some code fragments.
    Add missing iio_device_free.

Convert to new API.
Fix-up out of staging includes.
Removed pll_locked attribute.

Changes since V2:
Use module_spi_driver.
adf4350_remove: move gpio_free after regulator.
target patch to drivers/iio

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-04 21:19:40 -07:00
Michael Hennerich
cd1678f963 iio: frequency: New driver for AD9523 SPI Low Jitter Clock Generator
Changes since V1:

Apply Jonathan's review feedback:
Revise device status attribute names, and split documentation into two sections.
Add additional comments, and fix indention issues.
Remove pointless zero initializations.
Revise return value handling.
Simplify some code sections.
Split store_eeprom and sync handling into separate functions.
Use strtobool where applicable.
Document platform data structures using kernel-doc style.

Use dev_to_iio_dev
write_raw IIO_CHAN_INFO_FREQUENCY: Reject values <= 0
Make patch target drivers/iio

Changes since V2:

Use for_each_clear_bit() and __set_bit() where applicable.
Add descriptive comment.
Avoid temporary for struct regulator.
spi_device_id name use ad9523-1, ad9523 will be added later.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-04 21:19:05 -07:00
Lars-Peter Clausen
e407fd655b iio: Fix potential use after free
There is no guarantee that the last reference to the iio device has already been
dropped when iio_device_free is called. This means that we can up calling
iio_dev_release after iio_device_free which will lead to a use after free. As
the general rule the struct containing the device should always be freed in the
release callback.

This is what this patch does, it moves freeing the iio device struct as well as
releasing the idr reference to the release callback. To ensure that the device
is not freed before calling iio_device_free the device_unregister call in
iio_device_unregister is broken apart. iio_device_unregister will now only call
device_del to remove the device from the system and iio_device_free will call
put_device to drop the reference we obtained in iio_devce_alloc.

We also have to take care that calling iio_device_free without having called
iio_device_register still works (i.e. this can happen if something failed during
device initialization). For this to work properly two minor changes were
necessary: channel_attr_list needs to be initialized in iio_device_alloc and we
have to check whether the chrdev has been registered before releasing it in
iio_device_release.

This change also brings iio_device_unregister and iio_device_free more in sync
with iio_device_register and iio_device_alloc which call device_add and
device_initialize respectively.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-04 21:15:31 -07:00
Johan Hovold
9c8ea1b29b iio: add LM3533 ambient-light-sensor driver
Add sub-driver for the ambient-light-sensor interface on National
Semiconductor / TI LM3533 lighting power chips.

The sensor interface can be used to control the LEDs and backlights of
the chip through defining five light zones and three sets of
corresponding output-current values.

The driver provides raw and mean adc readings along with the current
light zone through sysfs. A threshold event can be generated on zone
changes. The ALS-control output values can be set per zone for the three
current output channels.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-04 21:12:29 -07:00
Lars-Peter Clausen
e53f5ac52e iio: Use dev_to_iio_dev()
Replace open-coded instances of getting a iio_dev struct from a device struct
with dev_to_iio_dev().

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14 13:37:45 -07:00
Maxime Ripard
e364185f3e IIO: AT91: Add DT support to at91_adc driver
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14 13:25:33 -07:00
Maxime Ripard
0e589d5fb3 ARM: AT91: IIO: Add AT91 ADC driver.
Add the ADC driver for Atmel's AT91SAM9G20-EK, AT91SAM9M10G45-EK
and AT91SAM9X5 family boards.

It has support for both software and hardware triggers.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14 13:24:09 -07:00
Michael Hennerich
e71d42e03c iio: amplifiers: New driver for AD8366 Dual-Digital Variable Gain Amplifier
Changes since V1:

Apply review feedback:
	Introduce and use IIO_CHAN_INFO_HARDWAREGAIN
	Introduce and use Use IIO_VAL_INT_PLUS_MICRO_DB

Modify out of staging include paths.
Convert to new iio core API naming.

Changes since V2:

more sanity checking in write_raw

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14 13:15:39 -07:00
Michael Hennerich
b65d62122f iio: core: introduce IIO_CHAN_INFO_HARDWAREGAIN
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14 13:15:39 -07:00
Michael Hennerich
67eedba39e iio: core: introduce dB scle: IIO_VAL_INT_PLUS_MICRO_DB
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14 13:15:38 -07:00
Axel Lin
abd5a2fb39 IIO: industrialio-core: Checking NULL instead of IS_ERR for debugfs_create_dir()
If defined CONFIG_DEBUG_FS, debugfs_create_dir returns NULL on failure.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-08 16:04:11 -07:00
Axel Lin
5a28c87397 IIO: industrialio-core: Use simple_open
Use simple_open to replace iio_debugfs_open.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-08 16:04:11 -07:00
Greg Kroah-Hartman
d210267741 Merge 3.4-rc5 into staging-next
This resolves the conflict in:
	drivers/staging/vt6656/ioctl.c

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-02 11:48:07 -07:00
Michael Hennerich
fc6d11398e iio: core: iio_chan_spec_ext_info: Add private handle
There is currently no user, but we might need it in future.
So better add it now, before we have to convert drivers afterwards.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-29 21:26:17 -04:00
Michael Hennerich
a6b12855b5 iio: core: Introduce IIO_ALTVOLTAGE and appropriate channel info elements
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-29 21:26:17 -04:00
Lars-Peter Clausen
7cbb753701 staging:iio: Streamline API function naming
Currently we use two different naming schemes in the IIO API, iio_verb_object
and iio_object_verb. E.g iio_device_register and iio_allocate_device. This
patches renames instances of the later to the former. The patch also renames allocate to
alloc as this seems to be the preferred form throughout the kernel.

In particular the following renames are performed by the patch:
	iio_put_device -> iio_device_put
	iio_allocate_device -> iio_device_alloc
	iio_free_device -> iio_device_free
	iio_get_trigger -> iio_trigger_get
	iio_put_trigger -> iio_trigger_put
	iio_allocate_trigger -> iio_trigger_alloc
	iio_free_trigger -> iio_trigger_free

The conversion was done with the following coccinelle patch with manual fixes to
comments and documentation.

<smpl>
@@
@@
-iio_put_device
+iio_device_put
@@
@@
-iio_allocate_device
+iio_device_alloc
@@
@@
-iio_free_device
+iio_device_free
@@
@@
-iio_get_trigger
+iio_trigger_get
@@
@@
-iio_put_trigger
+iio_trigger_put
@@
@@
-iio_allocate_trigger
+iio_trigger_alloc
@@
@@
-iio_free_trigger
+iio_trigger_free
</smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-29 21:23:49 -04:00
Jonathan Cameron
a980e04609 IIO: Move the core files to drivers/iio
Take the core support + the kfifo buffer implentation out of
staging.  Whilst we are far from done in improving this subsystem
it is now at a stage where the userspae interfaces (provided by
the core) can be considered stable.

Drivers will follow over a longer time scale.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-25 11:11:38 -07:00