Commit Graph

2714 Commits

Author SHA1 Message Date
Marcelo Schmitt
a816646f08 staging: iio: ad5933: add ABI documentation
Add an ABI documentation for the ad5933 driver.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:13 +01:00
Marcelo Schmitt
8fce3d34d7 staging: iio: ad5933: change help rule message
Remove the previous comment about direct access via sysfs which would
lead one think ad5933 driver has limitations it actually doesn't.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:12 +01:00
Marcelo Schmitt
adb0ef4120 staging: iio: ad5933: add SPDX identifier
Add SPDX identifier of GPL-2.0 for the ad5933 driver.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:11 +01:00
Marcelo Schmitt
700e8911a6 staging: iio: ad5933: organize includes
Organize includes to list them in lexicographic order.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:09 +01:00
Marcelo Schmitt
3204683722 staging: iio: ad5933: change multi-line comment style
Make multi-line comments compliant with the preferred code style.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:08 +01:00
Renato Lui Geh
9fb27f807e staging: iio: ad7780: moving ad7780 out of staging
Move ad7780 ADC driver out of staging and into the mainline.

The ad7780 is a sigma-delta analog to digital converter. This driver provides
reading voltage values and status bits from both the ad778x and ad717x series.
Its interface also allows writing on the FILTER and GAIN GPIO pins on the
ad778x.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Giuliano Belinassi <giuliano.belinassi@usp.br>
Co-developed-by: Giuliano Belinassi <giuliano.belinassi@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:06 +01:00
Renato Lui Geh
69fdf26f6f staging: iio: ad7780: add new copyright holder
This patch adds a new copyright holder to the ad7780 driver.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:05 +01:00
Renato Lui Geh
bb4af619a6 staging: iio: ad7780: add SPDX identifier
Add SPDX identifier (GPL-2.0) to the AD7780 driver.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:05 +01:00
Renato Lui Geh
5bb30e7daf staging: iio: ad7780: move regulator to after GPIO init
To maintain consistency between ad7780_probe and ad7780_remove orders,
regulator initialization has been moved to after GPIO initializations.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:04 +01:00
Renato Lui Geh
4812a14a78 staging:iio:ad7780: add chip ID values and mask
The ad7780 supports both the ad778x and ad717x families. Each chip has
a corresponding ID. This patch provides a mask for extracting ID values
from the status bits and also macros for the correct values for the
ad7170, ad7171, ad7780 and ad7781.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:04 +01:00
Renato Lui Geh
33e1f90204 staging: iio: ad7780: set pattern values and masks directly
The AD7780 driver contains status pattern bits designed for checking
whether serial transfers have been correctly performed. Pattern macros
were previously generated through bit fields. This patch sets good
pattern values directly and masks through GENMASK.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:03 +01:00
Renato Lui Geh
0ee6d5ebe1 staging: iio: ad7780: add filter reading to ad778x
This patch adds the new feature of reading the filter odr value for
ad778x chips. This value is stored in the chip's state struct whenever a
read or write call is performed on the chip's driver.

This feature requires sharing SAMP_FREQ. Since the ad717x does not have
a filter option, the driver only shares the relevant info mask for the
ad778x family.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:03 +01:00
Renato Lui Geh
0149ba2d5b staging: iio: ad7780: add gain reading to ad778x
This patch adds a new functionality of reading gain values from the
ad778x chips. This value is stored in the chip's state struct and is
updated whenever a read or write call is performed on the driver.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:03 +01:00
Renato Lui Geh
ae9f86feb4 staging: iio: ad7780: add missing switch default case
This patch simply adds a missing switch default case in read_raw.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:02 +01:00
Renato Lui Geh
9085daa4ab staging: iio: ad7780: add gain & filter gpio support
Previously, the AD7780 driver only supported gpio for the 'powerdown'
pin. This commit adds suppport for the 'gain' and 'filter' pin.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Giuliano Belinassi <giuliano.belinassi@usp.br>
Co-developed-by: Giuliano Belinassi <giuliano.belinassi@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:02 +01:00
Mircea Caprioru
eb4f07a5ba staging: iio: adc: ad7192: Convert platform data to DT properties
This patch will remove platform data members and replace them with device
tree properties. These properties will be subject to further modifications
and probably replaced with other functionalities at some point in time.

Signed-off-by: Mircea Caprioru <mircea.caprioru@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:01 +01:00
Mircea Caprioru
753a9870e0 staging: iio: adc: ad7192: Report error directly in ad7192_setup
This patch removes the goto out statement and uninformative
print message. This improves readability.

Signed-off-by: Mircea Caprioru <mircea.caprioru@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:00 +01:00
Mircea Caprioru
3ad7a939c9 staging: iio: adc: ad7192: Use DT clock binding
This patch replaces the platform data clock select member with DT clock
binding. Through the DT the external clock binding is specified. If this is
not provided then the device will use the internal clock source.

With the external clock binding there is the option to use a clock or a
crystal as the clock source. When an external crystal is used it is
connected to MCLK1 and MCLK2 pins. If the external clock is used only MCLK2
pin will be connected.

Signed-off-by: Mircea Caprioru <mircea.caprioru@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:20:00 +01:00
Mircea Caprioru
17b90e6a0d staging: iio: adc: ad7192: Fix identation
This patch fixes the odd indentation inside function ad7192_calibrate_all.

Signed-off-by: Mircea Caprioru <mircea.caprioru@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-04-04 20:19:59 +01:00
Daniela Mormocea
7782c3c93d staging: iio: Line over 80 characters
Fix line over 80 characters, warning by checkpatch

Signed-off-by: Daniela Mormocea <daniela.mormocea@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-18 07:05:19 +01:00
Beniamin Bia
8e8040c52e staging: iio: frequency: ad9833: Load clock using clock framework
The clock frequency is loaded from device-tree using clock framework
instead of statically value. The change allow configuration of
the device via device-trees and better initialization sequence.
This is part of broader effort to add device-tree support to this driver
and take it out from staging.

Signed-off-by: Beniamin Bia <beniamin.bia@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-02 17:06:49 +00:00
Beniamin Bia
80109c3234 staging: iio: frequency: ad9833: Get frequency value statically
The values from platform data were replaced by statically values.
This was just a intermediate step of taking this driver out of staging and
load data from device tree.

Signed-off-by: Beniamin Bia <beniamin.bia@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-02 16:01:36 +00:00
Alexandru Ardelean
0e4c2da4f0 staging: iio: cdc: ad7152: remove driver completely
The AD7153 part has been obsoleted for some time. The AD7152 part will be
obsolete in the coming future.
Moving it out of staging doesn't make sense anymore. Which makes the driver
enter a limbo state.

This patch removes the driver completely, so that no effort is placed on
it, allowing people to focus on other parts that will still be around.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-02-02 10:01:37 +00:00
Jeremy Fertic
78accaea11 staging: iio: adt7316: fix the dac write calculation
The lsb calculation is not masking the correct bits from the user input.
Subtract 1 from (1 << offset) to correctly set up the mask to be applied
to user input.

The lsb register stores its value starting at the bit 7 position.
adt7316_store_DAC() currently assumes the value is at the other end of the
register. Shift the lsb value before storing it in a new variable lsb_reg,
and write this variable to the lsb register.

Fixes: 35f6b6b86e ("staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver")
Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 17:57:06 +00:00
Jeremy Fertic
45130fb030 staging: iio: adt7316: fix the dac read calculation
The calculation of the current dac value is using the wrong bits of the
dac lsb register. Create two macros to shift the lsb register value into
lsb position, depending on whether the dac is 10 or 12 bit. Initialize
data to 0 so, with an 8 bit dac, the msb register value can be bitwise
ORed with data.

Fixes: 35f6b6b86e ("staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver")
Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 17:55:23 +00:00
Jeremy Fertic
76b7fe8d6c staging: iio: adt7316: fix handling of dac high resolution option
The adt7316/7 and adt7516/7 have the option to output voltage proportional
to temperature on dac a and/or dac b. The default dac resolution in this
mode is 8 bits with the dac high resolution option enabling 10 bits. None
of these settings affect dacs c and d. Remove the "1 (12 bits)" output from
the show function since that is not an option for this mode. Return
"1 (10 bits)" if the device is one of the above mentioned chips and the dac
high resolution mode is enabled.

In the store function, the driver currently allows the user to write to the
ADT7316_DA_HIGH_RESOLUTION bit regardless of the device in use. Add a check
to return an error in the case of an adt7318 or adt7519. Remove the else
statement that clears the ADT7316_DA_HIGH_RESOLUTION bit. Instead, clear it
before conditionally enabling it, depending on user input. This matches the
typical pattern in the driver when an attribute is a boolean.

Fixes: 35f6b6b86e ("staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver")
Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 17:52:17 +00:00
Jeremy Fertic
e9de475723 staging: iio: adt7316: fix dac_bits assignment
The value of dac_bits is used in adt7316_show_DAC() and adt7316_store_DAC(),
and it should be either 8, 10, or 12 bits depending on the device in use. The
driver currently only assigns a value to dac_bits in
adt7316_store_da_high_resolution(). The purpose of the dac high resolution
option is not to change dac resolution for normal operation. Instead, it
is specific to an optional feature where one or two of the four dacs can
be set to output voltage proportional to temperature. If the user chooses
to set dac a and/or dac b to output voltage proportional to temperature,
the da_high_resolution attribute can optionally be enabled to use 10 bit
resolution rather than the default 8 bits. This is only available on the
10 and 12 bit dac devices. If the user attempts to read or write dacs a
or b under these settings, the driver's current behaviour is to return an
error. Dacs c and d continue to operate normally under these conditions.
With the above in mind, remove the dac_bits assignments from this function
since the value of dac_bits as used in the driver is not dependent on this
dac high resolution option.

Since the dac_bits assignments discussed above are currently the only ones
in this driver, the default value of dac_bits is 0. This results in incorrect
calculations when the dacs are read or written in adt7316_show_DAC() and
adt7316_store_DAC(). To correct this, assign a value to dac_bits in
adt7316_probe() to ensure correct operation as soon as the device is
registered and available to userspace.

Fixes: 35f6b6b86e ("staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver")
Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 17:48:39 +00:00
Stefan Popa
2985a5d884 staging: iio: adc: ad7606: Move out of staging
Move ad7606 ADC driver out of staging and into the mainline.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 16:10:59 +00:00
Stefan Popa
54160ae3b2 staging: iio: adc: ad7606: Misc style fixes (no functional change)
* Placed includes in alphabetical order
* Added brackets around num and mask through out for AD760X_CHANNEL
* Used single line comments where needed
* Removed extra lines and spaces

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 16:10:52 +00:00
Stefan Popa
cc49bd1652 staging: iio: adc: ad7606: Add support for threaded irq
This patch replaces the use of a polling ring buffer with a threaded
interrupt.

Enabling the buffer sets the CONVST signal to high. When the rising edge
of the CONVST is applied, BUSY signal goes logic high and transitions low
at the end of the entire conversion process. The falling edge of the BUSY
signal triggers the interrupt.

ad7606_trigger_handler() is used as bottom half of the poll function.
It reads data from the device and stores it in the internal buffer.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 16:10:52 +00:00
Stefan Popa
ca5b4637d7 staging: iio: adc: ad7606: Use SPDX identifier
This patch replaces the license text at the top of ad7606 driver files
and instead adds SPDX GPL-2.0 license identifier.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 16:10:51 +00:00
Stefan Popa
2bbf53e3e5 staging: iio: adc: ad7606: Simplify the Kconfing menu
There is no point in having three menu entries that can be selected
individually. Instead, the SPI and parallel interfaces should select
AD7606.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-01-05 16:10:51 +00:00
Stefan Popa
43f9b204ed staging: iio: adc: ad7606: Add OF device ID table
The driver does not have a struct of_device_id table, but supported
devices are registered via Device Trees. This patch adds and OF device
ID table.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-22 16:58:14 +00:00
Stefan Popa
6620585a0c staging: iio: adc: ad7606: Use vendor prefix for DT properties
The 'adi' vendor prefix needs to be added to conversion-start, range,
first-data and oversampling-ratio properties.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-22 16:58:13 +00:00
Stefan Popa
41f71e5e7d staging: iio: adc: ad7606: Use find_closest() macro
When looking for the available scale or oversampling ratio, it is better
to use the find_closest() macro. This simplifies the code and also does
not require an exact value to be entered from the user space.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-22 16:58:13 +00:00
Stefan Popa
c0683bfd37 staging: iio: adc: ad7606: Use devm functions in probe
Switch to devm version of request_irq, iio_triggered_buffer_setup,
iio_device_register. To avoid potential ordering issues in probe,
devm_add_action_or_reset() is used for the regulator_disable(). This
simplifies the code and decreases the chance of bugs.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-22 16:58:13 +00:00
Stefan Popa
557e585c3f staging: iio: adc: ad7606: Use wait-for-completion handler
This patch replaces the use of wait_event_interruptible() with
wait_for_completion_timeout() when reading the result of a single
conversion. In this way, if the interrupt never occurs, the program will
not remain blocked.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-22 16:58:12 +00:00
Hardik Singh Rathore
f1b753a0f8 staging: iio: ad7816: drop unnecessary initialization of variables
Initialization is unnecessary when the variable is written before it is
read. There were some occasions in which the driver would initialize `ret'
during declaration without need.

Signed-off-by: Hardik Singh Rathore <hardiksingh.k@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:57 +00:00
Slawomir Stepien
4b6374577f staging: iio: adc: ad7280a: split ad7280_attr_init() to more functions
The ad7280_attr_init function has been split into more specific
functions to increase the code readability.

Signed-off-by: Slawomir Stepien <sst@poczta.fm>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:57 +00:00
Slawomir Stepien
243c5c9d7b staging: iio: adc: ad7280a: split ad7280_channel_init() to more functions
The ad7280_channel_init function has been split into more specific
functions to increase the code readability.

The setting of channel's scan_type.shift to 0, has been removed, since
it is the default value.

Signed-off-by: Slawomir Stepien <sst@poczta.fm>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:57 +00:00
Marcelo Schmitt
0e0a22aebd staging: iio: ad5933: use clock framework for clock reference
Add the option to specify the external clock (MCLK) using the clock
framework.
Also remove the old platform data structure.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Gabriel Capella <gabriel@capella.pro>
Co-developed-by: Gabriel Capella <gabriel@capella.pro>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:56 +00:00
Marcelo Schmitt
c9d07120ab staging: iio: ad5933: change regulator binging for vref
Set a single voltage regulator for all voltage references.
Remove voltage reference value from default platafrom data struct.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Gabriel Capella <gabriel@capella.pro>
Co-developed-by: Gabriel Capella <gabriel@capella.pro>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:56 +00:00
Shreeya Patel
7f6b6d553d Staging: iio: adt7316: Add all irq related code in adt7316_irq_setup()
ADT7316 driver no more uses platform data and hence use device tree
data instead of platform data for assigning irq_type field and
implement this in adt7316_irq_setup function.
Switch case figures out the type of irq and if it's the default case
then assign the default value to the irq_type i.e.
irq_type = IRQF_TRIGGER_LOW
Move devm_request_threaded_irq() and assignment of chip->config1
into the adt7316_setup_irq() to unclutter the code in probe function.

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:56 +00:00
Hardik Singh Rathore
1533e45748 staging: iio: adt7316: drop unnecessary initialization of variables
Initialization is unnecessary when the variable is written before it is
read. There were some occasions in which the driver would initialize `ret'
during declaration without need.

Purely a cosmetic change with no functional impact.

Signed-off-by: Hardik Singh Rathore <hardiksingh.k@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:56 +00:00
Jeremy Fertic
618ab57f95 staging: iio: adt7316: correct spelling of ADT7316_DA_EN_VIA_DAC_LDCA
Change LDCA to LDAC.

Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:56 +00:00
Jeremy Fertic
32f228cb2a staging: iio: adt7316: change interpretation of write to dac update mode
Based on the output of adt7316_show_all_DAC_update_modes() and
adt7316_show_DAC_update_mode(), adt7316_store_DAC_update_mode() should
expect the user to enter an integer input from 0 to 3. The user input is
currently expected to account for the actual bit positions in the register.
For example, choosing option 3 would require a write of 0x30 (actually 48
since it expects base 10). To address this inconsistency, create a shift
macro to be used in the valid input check as well as the calculation for
the register write.

Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:56 +00:00
Jeremy Fertic
9f287a1c3f staging: iio: adt7316: remove dac vref buffer bypass from adt751x
The option to allow the external vref to bypass the reference buffer is
only available for adt7316/7/8. Remove the attributes for adt751x as
well as the chip->id checks from the show and store functions.

Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:55 +00:00
Jeremy Fertic
10bfe7cc17 staging: iio: adt7316: allow adt751x to use internal vref for all dacs
With adt7516/7/9, internal vref is available for dacs a and b, dacs c and
d, or all dacs. The driver doesn't currently support internal vref for all
dacs. Change the else if to an if so both bits are checked rather than
just one or the other.

Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Fixes: 35f6b6b86e ("staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:55 +00:00
Jeremy Fertic
5107d16e0a staging: iio: adt7316: use correct variable in DAC_internal_Vref read
The dac internal vref settings are part of the ldac config register rather
than the dac config register. Change the variable being used so the read
returns the correct result.

Whilst a fix, it is for a driver in heavy churn so do not backport
to stable without taking considerable care and testing.

Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:55 +00:00
Jeremy Fertic
85a1c11913 staging: iio: adt7316: invert the logic of the check for an ldac pin
ADT7316_DA_EN_VIA_DAC_LDCA is set when the dac and ldac registers are being
used to update the dacs instead of the ldac pin. ADT7516_SEL_AIN3 is an adc
input that shares the ldac pin. Only set these bits if an ldac pin is not
being used.

This could be backported to stable, but note there are various
other bugs that probably make that a waste of time.

Signed-off-by: Jeremy Fertic <jeremyfertic@gmail.com>
Fixes: 35f6b6b86e ("staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-12-16 14:05:55 +00:00