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* Drivers: iio: remove __dev* attributes.Greg Kroah-Hartman2013-01-0434-139/+138
| | | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge tag 'mfd-3.8-1' of ↵Linus Torvalds2012-12-174-1/+457
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6 Pull MFS update from Samuel Ortiz: "This is the MFD patch set for the 3.8 merge window. We have several new drivers, most of the time coming with their sub devices drivers: - Austria Microsystem's AS3711 - Nano River's viperboard - TI's TPS80031, AM335x TS/ADC, - Realtek's MMC/memstick card reader - Nokia's retu We also got some notable cleanups and improvements: - tps6586x got converted to IRQ domains. - tps65910 and tps65090 moved to the regmap IRQ API. - STMPE is now Device Tree aware. - A general twl6040 and twl-core cleanup, with moves to the regmap I/O and IRQ APIs and a conversion to the recently added PWM framework. - sta2x11 gained regmap support. Then the rest is mostly tiny cleanups and fixes, among which we have Mark's wm5xxx and wm8xxx patchset." Far amount of annoying but largely trivial conflicts. Many due to __devinit/exit removal, others due to one or two of the new drivers also having come in through another tree. * tag 'mfd-3.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (119 commits) mfd: tps6507x: Convert to devm_kzalloc mfd: stmpe: Update DT support for stmpe driver mfd: wm5102: Add readback of DSP status 3 register mfd: arizona: Log if we fail to create the primary IRQ domain mfd: tps80031: MFD_TPS80031 needs to select REGMAP_IRQ mfd: tps80031: Add terminating entry for tps80031_id_table mfd: sta2x11: Fix potential NULL pointer dereference in __sta2x11_mfd_mask() mfd: wm5102: Add tuning for revision B mfd: arizona: Defer patch initialistation until after first device boot mfd: tps65910: Fix wrong ack_base register mfd: tps65910: Remove unused data mfd: stmpe: Get rid of irq_invert_polarity mfd: ab8500-core: Fix invalid free of devm_ allocated data mfd: wm5102: Mark DSP memory regions as volatile mfd: wm5102: Correct default for LDO1_CONTROL_2 mfd: arizona: Register haptics devices mfd: wm8994: Make current device behaviour the default mfd: tps65090: MFD_TPS65090 needs to select REGMAP_IRQ mfd: Fix stmpe.c build when OF is not enabled mfd: jz4740-adc: Use devm_kzalloc ...
| * iio: adc: Add viperboard adc driverLars Poeschel2012-11-203-0/+189
| | | | | | | | | | | | | | | | | | | | This adds the mfd cell to use the adc part of the Nano River Technologies viperboard. Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
| * IIO : ADC: tiadc: Add support of TI's ADC driverPatil, Rachna2012-11-053-0/+268
| | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for TI's ADC driver. This is a multifunctional device. Analog input lines are provided on which voltage measurements can be carried out. You can have upto 8 input lines. Signed-off-by: Patil, Rachna <rachna@ti.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* | iio: imu: adis16480: remove duplicated include from adis16480.cWei Yongjun2012-11-301-1/+0
| | | | | | | | | | | | | | Remove duplicated include. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: gyro: adis16136: remove duplicated include from adis16136.cWei Yongjun2012-11-301-1/+0
| | | | | | | | | | | | | | Remove duplicated include. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:imu: adis16480: show_firmware() buffer too smallDan Carpenter2012-11-301-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Smatch complains that snprintf() returns the number of characters, not counting the NUL terminator, which *would* have been printed if there were enough space. In other words the return value could be more than sizeof(buf). In this case, we are printing something like "ff.ff\n" which is at most 6 characters and a NUL so that's not an issue. I changed snprintf() to scnprintf() to silence the warning. But since the buffer doesn't include space for the NUL terminator, we need to make it bigger or the "\n" will be truncated off. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-By: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:gyro: adis16136: divide by zero in write_frequency()Dan Carpenter2012-11-301-2/+2
| | | | | | | | | | | | | | | | | | | | | | It's slightly cleaner to use kstrtouint() because we pass unsigned ints to adis16136_set_freq(). On 64 bit systems, if the user passed LONG_MIN then it we would get past the test against zero but crash in adis16136_set_freq() because we truncate the high bits away. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-By: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: adc: Add Texas Instruments ADC081C021/027 supportThierry Reding2012-11-303-0/+173
| | | | | | | | | | | | | | | | | | | | Add support for reading conversion results from the ADC and provide them through a single IIO channel. A proper scaling factor is also exported based on the reference voltage provided by a regulator. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:ad7793: Add support for the ad7796 and ad7797Lars-Peter Clausen2012-11-301-12/+109
| | | | | | | | | | | | | | | | | | | | | | | | | | The ad7796 and ad7797 are similar to the ad7792 and ad7793 but only have a single differential input instead of two. Also some other features are missing like the programmable gain amplifier and also not all sampling frequencies supported by the ad7792/ad7793 are supported by the ad7796/ad7797. This patch adds new feature flags for the features not present in the ad7796/ad7797. The patch also adds a struct iio_info field to the chip_info struct, this becomes necessary since the ad7796/ad7797 needs a special set of sysfs attributes. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:ad7793: Add support for the ad7798 and ad7799Lars-Peter Clausen2012-11-301-14/+102
| | | | | | | | | | | | | | | | | | | | | | | | The ad7798 and ad7799 are similar to the ad7792 and ad7793 but are missing some features like the temperature sensor, being able to use an external clocksource and a few other things. This patch adds a new 'flags' fields to the chip_info struct which allows to specify which features a certain chip variant supports. The setup code will then ignore any platform data fields which are related to non supported features. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | staging:iio: Move ad7793 driver out of stagingLars-Peter Clausen2012-11-303-0/+704
| | | | | | | | | | | | | | | | The driver does not expose any custom API to userspace and none of the standard static code checker tools report any issues, so move it out of staging. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:adc:ad7298 make the tx and rx buffers __be16Jonathan Cameron2012-11-211-2/+2
| | | | | | | | | | | | | | | | | | | | These buffers are a little interesting in that their content may have variable endianness, but all but one element will definitely be big endian. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org> Acked-by: Lars-Peter Clausen <lars@metafoo.de>
* | iio:imu: Add support for the ADIS16480 and similar IMUsLars-Peter Clausen2012-11-204-0/+946
| | | | | | | | | | | | | | | | This patch adds support for the ADIS16375, ADIS16480, ADIS16485, ADIS16488 6 degree to 10 degree of freedom IMUs. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: Factor out fixed point number parsing into its own functionLars-Peter Clausen2012-11-201-35/+63
| | | | | | | | | | | | | | | | | | Factor out the code for parsing fixed point numbers into its own function and make this function globally available. This allows us to reuse the code to parse fixed point numbers in individual IIO drivers. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: Add pressure channel typeLars-Peter Clausen2012-11-201-0/+1
| | | | | | | | | | | | | | | | This patch adds support for a new IIO channel type for pressure measurements. This can for example be used for barometric pressure sensors. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:imu:adis: Add paging supportLars-Peter Clausen2012-11-202-16/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some of the newer generation devices from the ADIS16XXX series have more registers than what can be supported with the current register addressing scheme. These devices implement register paging to support a larger register range. Each page is 128 registers large and the currently active page can be selected via register 0x00 in each page. This patch implements transparent paging inside the common adis library. The register read/write interface stays the same and when a register is accessed the library automatically switches to the correct page if it is not already selected. The page number is encoded in the upper bits of the register number, e.g. register 0x5 of page 1 is 0x85. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:gyro: Add support for the ADIS16136 gyroscopeLars-Peter Clausen2012-11-203-0/+591
| | | | | | | | | | | | | | | | This patch adds support for the ADIS16133, ADIS16135, ADIS16136 single channel gyroscopes. The main difference between them is the sensor precision. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:imu:adis: Add support for 32bit registersLars-Peter Clausen2012-11-202-53/+94
| | | | | | | | | | | | | | | | | | Some of the newer generation devices from the ADIS16XXX family have 32bit wide register which spans two 16bit wide registers. This patch adds support for reading and writing a 32bit wide register. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:imu:adis: Add debugfs register access supportLars-Peter Clausen2012-11-201-0/+23
| | | | | | | | | | | | | | | | | | Provide a IIO debugfs register access function for the ADIS library. This function can be used by individual drivers to allow raw register access via debugfs. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | staging:iio: Move the ad7298 driver out of stagingLars-Peter Clausen2012-11-193-0/+421
| | | | | | | | | | | | | | | | The driver does not expose any custom API to userspace and none of the standard static code checker tools report any issues, so move it out of staging. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | staging:iio: Move adis library out of stagingLars-Peter Clausen2012-11-197-6/+612
| | | | | | | | | | | | | | | | | | | | | | Now that the adis library no longer depends on the sw_ring buffer implementation we can move it out of staging. While we are at it also sort the entries in the iio Kconfig and Makefile to be in alphabetical order. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: hid-sensor: Return proper error if kmemdup failsAxel Lin2012-11-174-12/+11
| | | | | | | | | | | | | | Return -ENOMEM instead of 0 if kmemdup fails. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | drivers/iio/industrialio-event.c: eliminate possible double freeJulia Lawall2012-11-171-6/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The function __iio_add_event_config_attrs is only called once, by the function iio_device_register_eventset. If the call fails, iio_device_register_eventset calls __iio_remove_event_config_attrs. There is thus no need for __iio_add_event_config_attrs to also call __iio_remove_event_config_attrs on failure. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ identifier f,free,a; parameter list[n] ps; type T; expression e; @@ f(ps,T a,...) { ... when any when != a = e if(...) { ... free(a); ... return ...; } ... when any } @@ identifier r.f,r.free; expression x,a; expression list[r.n] xs; @@ * x = f(xs,a,...); if (...) { ... free(a); ... return ...; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: hid-sensors: convert HID_SENSOR_ENUM_BASE_QUIRKS to boolKirill A. Shutemov2012-11-172-5/+3
| | | | | | | | | | | | | | It's non-sense to use tristate for the option, it's bool. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:adc:max1363 move from staging.Jonathan Cameron2012-11-103-0/+1719
| | | | | | | | | | | | Now this driver is using kfifo we can move it out of staging. Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | staging:iio: add a callback buffer for in kernel push interfaceJonathan Cameron2012-11-103-0/+120
| | | | | | | | | | | | | | | | This callback buffer is meant to be opaque to users, but basically adds a very simple pass through buffer to which data may be pushed when it is inserted into the buffer list. Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | staging:iio:in kernel users: Add a data field for channel specific info.Jonathan Cameron2012-11-101-0/+1
| | | | | | | | | | | | | | Used to allow information about a given channel mapping to be passed through from board files to the consumer drivers. Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | staging:iio: Add support for multiple buffersJonathan Cameron2012-11-1012-182/+274
| | | | | | | | | | | | | | | | | | Route all buffer writes through the demux. Addition or removal of a buffer results in tear down and setup of all the buffers for a given device. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Tested-by: srinivas pandruvada <srinivas.pandruvada@intel.com>
* | staging:iio: Move the ad7887 driver out of stagingLars-Peter Clausen2012-11-053-0/+392
| | | | | | | | | | | | | | | | The driver does not expose any custom API to userspace and none of the standard static code checker tools report any issues, so move it out of staging. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: Accept a leading '+' sign when parsing fixed point numbersLars-Peter Clausen2012-11-021-0/+2
| | | | | | | | | | | | | | If we encounter a leading '+' sign just skip over it. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: Reject trailing garbage when parsing fixed point numbersLars-Peter Clausen2012-11-021-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | When parsing a fixed point number IIO stops parsing the string once it has reached the last requested decimal place. This means that the remainder of the string is silently accepted regardless, of whether it is part of a valid number or not. This patch modifies the code to scan the whole string and only accept valid numbers. Since fract_mult is 0 after the last decimal place any digit that may follows won't affect the result. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: Do not accept multiple '.' in fixed point numbersLars-Peter Clausen2012-11-021-1/+1
| | | | | | | | | | | | | | | | | | Currently when parsing a fix-point number we silently skip any additional '.' found in the string. E.g. '1.2.3.4' gets parsed as '1.234'. This patch disallows this and returns an error if more than one '.' is encountered. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio:dac:ad5449: unlock on error pathDan Carpenter2012-10-311-3/+4
| | | | | | | | | | | | | | | | There is an unlock missing on this error path. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | Revert "iio: at91_adc: Use devm_kcalloc to allocate arrays"Axel Lin2012-10-311-6/+10
| | | | | | | | | | | | | | | | This reverts commit 45259859492812c8b700ae1d157be01a8d2babfe. This fixes build error because devm_kcalloc does not exist in current tree. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | Merge 3.7-rc3 into staging-nextGreg Kroah-Hartman2012-10-292-2/+0
|\| | | | | | | | | | | | | | | | | This resolves the conflict with: drivers/staging/comedi/drivers/amplc_dio200.c and syncs up the changes that happened in the staging directory for 3.7-rc3. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * iio: Remove duplicates for light/ in Kconfig and MakefileAndreas Larsson2012-10-192-2/+0
| | | | | | | | | | Signed-off-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | drivers/iio/dac: remove CONFIG_EXPERIMENTALKees Cook2012-10-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This config item has not carried much meaning for a while now and is almost always enabled by default. As agreed during the Linux kernel summit, remove it. CC: Jonathan Cameron <jic23@cam.ac.uk> CC: Lars-Peter Clausen <lars@metafoo.de> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CC: Michael Hennerich <michael.hennerich@analog.com> CC: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | iio:dac: Add support for the ad5449Lars-Peter Clausen2012-10-193-0/+386
| | | | | | | | | | | | | | | | This patch adds support for the AD5415, AD5426, AD5429, AD5432, AD5439, AD5443 and AD5449 single and dual channel DACs. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: Add a logarithmic fractional value typeLars-Peter Clausen2012-10-192-0/+8
| | | | | | | | | | | | | | | | | | | | | | For ADCs or DACs the denominator for fractional types often is a power of two. In this case we can use a shift operation instead of the rather expensive 64 bit division. This patch adds a new fractional type which expects the denominator to be specified as the log2 of the actual denominator. E.g. for ADCs and DACs this will usually be the number of significant bits. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: Use strict_strtouint instead of kstrtoulLars-Peter Clausen2012-10-192-5/+5
| | | | | | | | | | | | | | | | | | strict_strto* has been deprecated in favor of kstrto*. Use strict_strtouint respective strict_strtoint, since that is what the functions we pass the converted values to expect. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: at91_adc: Use devm_kcalloc to allocate arraysLars-Peter Clausen2012-10-191-10/+6
| | | | | | | | | | | | | | | | | | | | | | | | Use dev_kcalloc instead of devm_kzalloc to allocate arrays since it is semantically more appropriate. While we are at it the patch also fixes the following coccinelle warning: drivers/iio/adc/at91_adc.c:277:25-31: ERROR: application of sizeof to pointer Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-By: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: Don't compare boolean values to true/falseLars-Peter Clausen2012-10-192-2/+2
| | | | | | | | | | | | | | | | | | Fixes the following warnings from coccicheck: drivers/iio/inkern.c:81:6-14: WARNING: Comparison to bool drivers/iio/dac/ad5686.c:191:5-11: WARNING: Comparison to bool Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: fix spelling of Accelerometer in KconfigPeter Meerwald2012-10-191-1/+1
| | | | | | | | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Srinivas pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: use iio_push_to_buffer() in at91 driverPeter Meerwald2012-10-191-1/+1
| | | | | | | | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* | iio: remove useless irq_enabled variable in at91Peter Meerwald2012-10-191-3/+0
|/ | | | | | | | irq_enabled is only set, but never read Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: adc: add new lp8788 adc driverKim, Milo2012-09-223-0/+271
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TI LP8788 PMU provides regulators, battery charger, ADC, RTC, backlight driver and current sinks. This patch enables the LP8788 ADC functions. The LP8788 ADC has several ADC input selection and supports 12bit resolution. Internal operation of getting ADC is access to registers of LP8788. The LP8788 ADC uses exported functions for accessing these registers. (exported by LP8788 MFD device driver) This driver supports IIO_CHAN_INFO_RAW and SCALE. So the IIO consumer can calculate the value with raw and scale. The unit of scale is micro. (ADC Input Selection) Voltage: battery voltage (MAX 5.0, 5.5 and 6.0V) charger input voltage four general ADC inputs coin cell voltage Current: battery charging current Temperature: IC temperature (The IIO map for the IIO consumer) The ADC input is configurable in the platform side. Even though this platform data is not defined, the default IIO map is created for supporting the power supply driver. The battery voltage and temperature are used inside this driver. (History) Patch v6. (a) Fix scale value for each ADC input selection Voltage and current type are mili unit and temperature is degree. To calculate the IC temperature, temp = raw * scaleint + (raw * scalepart)/ 1000000, scaleint is always 0. = raw * 0.061050, raw: 0 ~ 4095 Then range of IC temperature(ADC result) is 0 ~ 250'C (b) Reorganization of the IIO channel Spec Remove address, scan_type and scan_index and rollback the datasheet name. The reason why 'address' field is unnecessary is no relation with each channel. Moreover, to get the raw ADC value, the address info is not only one register but also several registers. Therefore specific function(lp8788_get_adc_result) is called rather than using one 'address' field. (c) Fix coding style Remove duplicated checking routine while unregistering the IIO map. Fix code for space and parenthesis. Patch v5. Fix default consumer name as 'lp8788-charger'. Add mutex for ADC read operation. Reorganization on lp8788_adc_read_raw(). Patch v4. Fix adc_raw function: support RAW and SCALE channel info. Change LP8788 ADC platform data - iio map. Enables the default IIO map. Patch v3. Fix wrong size of allocating iio private data. Fix coding styles. Patch v2. Support RAW and SCALE interface for IIO consumer. Clean up the iio channel spec macro. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: inkern: clean up error return codeKim, Milo2012-09-221-5/+8
| | | | | | | | | | | | | | | | | | | | | When the IIO consumer tries to get specific IIO channel, few error cases can be happened. (a) Memory allocation failure (b) No matched ADC channel error (c) Invalid input arguments This patch enables cleaning up error handling in case of (a) and (b). In error handling code, (a): the reference count of the IIO device should be decreased. (b): the allocated memory should be freed with restoring the reference count. Therefore iio_deivce_put() is called in both cases. This can be handled in the last error statement. Additionally, integer variable is used for stating each error case explicitly. Then, the error returns as ERR_PTR() with this value. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: inkern: put the IIO device when it fails to allocate memoryKim, Milo2012-09-221-1/+4
| | | | | | | | | | | | The reference count of the IIO device is increased if the IIO map has matched consumer name. After then, it tries to allocate the iio_channel which is used by the consumer. If it fails to allocate memory, the reference count should be decreased. This patch enables restoring the reference count of the IIO device. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
* iio: dac/ad5755: signedness bug in ad5755_setup_pdata()Dan Carpenter2012-09-221-1/+1
| | | | | | | | We need "ret" to be signed for the error handling to work correctly. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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