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path: root/drivers/iio/dac/mcp4725.c
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2017-03-19iio: dac: mcp4725: Add OF device ID tableJavier Martinez Canillas1-2/+22
The driver doesn't have a struct of_device_id table but supported devices are registered via Device Trees. This is working on the assumption that a I2C device registered via OF will always match a legacy I2C device ID and that the MODALIAS reported will always be of the form i2c:<device>. But this could change in the future so the correct approach is to have an OF device ID table if the devices are registered via OF. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-23iio: dac: mcp4725: fix odd_ptr_err.cocci warningsJulia Lawall1-1/+1
PTR_ERR should access the value just tested by IS_ERR Generated by: scripts/coccinelle/tests/odd_ptr_err.cocci CC: Tomas Novotny <tomas@novotny.cz> Signed-off-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-23iio: dac: mcp4725: add devicetree supportTomas Novotny1-6/+37
Signed-off-by: Tomas Novotny <tomas@novotny.cz> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-23iio: dac: mcp4725: support voltage reference selectionTomas Novotny1-7/+92
MCP47x6 chip supports selection of a voltage reference (VDD, VREF buffered or unbuffered). MCP4725 doesn't have this feature thus the eventual setting is ignored and user is warned. The setting is stored only in the volatile memory of the chip. You need to manually store it to the EEPROM of the chip via 'store_eeprom' sysfs entry. Signed-off-by: Tomas Novotny <tomas@novotny.cz> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-23iio: dac: mcp4725: fix incorrect commentTomas Novotny1-1/+1
Number 2 is referencing to the settings with the largest available resistor. No functional change. Signed-off-by: Tomas Novotny <tomas@novotny.cz> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-10-23iio: dac: mcp4725: use regulator frameworkTomas Novotny1-9/+37
Use a standard framework to get the reference voltage. It is done that way in the iio subsystem and it will simplify extending of the driver. Structure mcp4725_platform_data is left undeleted because it used in the next patch. This change breaks the current users of the driver, but there is no mainline user of struct mcp4725_platform_data. Signed-off-by: Tomas Novotny <tomas@novotny.cz> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-02-08Merge 4.5-rc3 into staging-nextGreg Kroah-Hartman1-0/+1
We want the upstream staging fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-09iio: dac: mcp4725: set iio name property in sysfsYong Li1-0/+1
Without this change, the name entity for mcp4725 is missing in /sys/bus/iio/devices/iio\:device*/name With this change, name is reported correctly Signed-off-by: Yong Li <sdliyong@gmail.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-01-03iio: dac: mcp4725: Add basic support for MCP4726Akinobu Mita1-20/+67
MCP4726 is a single channel 12-bit DAC. We can support MCP4726 with a little changes to mcp4725 driver. In power-down mode, they have different selection of VOUT pull-down registers. MCP4726 also has features: - Output gain options: 1x, 2x - Voltage reference selection: VDD, VREF (Unbuffered or Buffered) But these are not supported in this change. (1x gain, VDD is selected) datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/22272C.pdf Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Peter Meerwald <pmeerw@pmeerw.net> Cc: linux-iio@vger.kernel.org Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2014-01-11iio: delete non-required instances of include <linux/init.h>Paul Gortmaker1-1/+0
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-12-18iio:dac:mcp4725 drop specification of scan type as unused in this driver.Jonathan Cameron1-1/+0
IIO_ST is going away as it is a pain to maintain so the simplest path with this driver is to not specify the unused scan type. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Acked-by: Lars-Peter Clausen <lars@metafoo.de>
2013-10-24iio: dac: mcp4725: Remove redundant codeSachin Kamat1-7/+1
Remove an inconsequential print message and return directly thereby cleaning up some code. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-10-01iio:mcp4725: Report scale as fractional valueLars-Peter Clausen1-5/+3
Move the complexity of calculating the fixed point scale to the core. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-25Merge 3.12-rc2 into staging-next.Greg Kroah-Hartman1-6/+6
This resolves the merge problem with two iio drivers that Stephen Rothwell pointed out. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-21iio: Fix mcp4725 dev-to-indio_dev conversion in suspend/resumePeter Meerwald1-6/+6
dev_to_iio_dev() is a false friend Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-09-15iio: refactor info mask and ext_info attribute creation.Jonathan Cameron1-1/+2
Introduce an enum to specify whether the attribute is separate or shared. Factor out the bitmap handling for loop into a separate function. Tidy up error handling and add a NULL assignment to squish a false positive warning from GCC. Change ext_info shared type from boolean to enum and update in all drivers. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
2013-08-04iio:mcp4725: Use devm_iio_device_allocPeter Meerwald1-19/+7
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-03iio:dac:mcp4725 wrong return type of attribute _show functionJonathan Cameron1-1/+1
Should be ssize_t and is int. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Reported-by: Fengguan Wu <fengguang.wu@intel.com> Acked-by: Peter Meerwald <pmeerw@pmeerw.net>
2013-08-03iio: add powerdown to mcp4725 dac drivePeter Meerwald1-2/+85
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-08-03iio: add store_eeprom to mcp4725 dac driverPeter Meerwald1-2/+62
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-03-17iio:dac:mcp4725 move to info_mask_(shared_by_type/separate)Jonathan Cameron1-2/+2
The original info_mask is going away in favour of the broken out versions. Signed-off-by: Jonathan Cameron <jic23@kernel.org> cc: Peter Meerwald <pmeerw@pmeerw.net>
2013-01-04Drivers: iio: remove __dev* attributes.Greg Kroah-Hartman1-4/+4
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>
2012-06-13iio: add mcp4725 I2C DAC driverPeter Meerwald1-0/+227
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>
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