Add support for AD4129-4/8, AD4130-4, and AD4131-4/8 variants.
The AD4129 series supports the same FIFO interface as the AD4130 but with
reduced resolution (16-bit). The AD4131 series lacks FIFO support, so
triggered buffer functionality is introduced.
The 4-channel variants feature fewer analog inputs, GPIOs, and sparse pin
mappings for VBIAS, analog inputs, and excitation currents. The driver now
handles these differences with chip-specific configurations, including pin
mappings and GPIO counts.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Introduce a chip_info structure to abstract device-specific parameters
and prepare the driver for supporting multiple AD4130 family variants.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Add SPI device ID table to enable non-device tree based device binding.
The id_table provides a fallback matching mechanism when of_match_table
cannot be used, which is required for proper SPI driver registration.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Replace mutex_lock()/mutex_unlock() pair with guard(mutex)()
and move the lock into ads7924_get_adc_result(). Keeping the guard
in the helper makes the locking scope match the operation being protected.
Suggested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Giorgi Tchankvetadze <giorgitchankvetadze1997@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Add i2c_device_id table to support legacy I2C instantiation.
Update probe to use i2c_get_match_data() so device data can be
retrieved consistently for both OF and legacy I2C instantiation.
Signed-off-by: Kevin Tung <kevin.tung.openbmc@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use 'u32' instead of bare 'unsigned' to resolve checkpatch.pl warnings
and correct type use as defined in the struct hid_sensor_hub_callbacks.
No functional change.
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Both ad4170_gpio_direction_input() and
ad4170_gpio_direction_output() duplicate the same switch
statement to map a GPIO offset to its corresponding mask.
Replace the switch with a static lookup table, simplifying the code
and avoiding duplication. This also makes future extensions easier.
No functional change intended.
Signed-off-by: Guilherme Ivo Bozi <guilherme.bozi@usp.br>
Acked-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Extend binding support for AD4129-4/8, AD4130-4, and AD4131-4/8 ADC
variants.
Dropped a reference to driver in the binding whilst here.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
The Data Ready/FIFO interrupt has a special behavior that inverts the
IRQ polarity when devices with FIFO support enter FIFO mode, while using
normal polarity for data ready.
Document the interrupts property to clarify this special behavior for
users.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() which is helpful with CONFIG_DEBUG_MUTEXES.
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() which is helpful with CONFIG_DEBUG_MUTEXES.
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() which is helpful with CONFIG_DEBUG_MUTEXES.
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() which is helpful with CONFIG_DEBUG_MUTEXES.
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() which is helpful with CONFIG_DEBUG_MUTEXES.
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() which is helpful with CONFIG_DEBUG_MUTEXES.
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() which is helpful with CONFIG_DEBUG_MUTEXES.
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use field_get() here now that runtime-mask support exists, and drop
the obsolete TODO. Since NXP_SAR_ADC_EOC_CH(c) is BIT(c), the
resulting !-test is semantically identical.
No functional change.
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Piyush Patle <piyushpatle228@gmail.com>
Acked-by: Daniel Lezcano <daniel.lezcano@oss.qualcomm.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use field_get() for the per-channel DAC power-down bit instead of an
open-coded mask-and-shift sequence.
No functional change.
Signed-off-by: Piyush Patle <piyushpatle228@gmail.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use spi_optimize_message() to reduce CPU usage during buffered reads.
On hardware with support for SPI_CS_WORD, this reduced the CPU usage
of the threaded interrupt by about 5%. On hardware without support, this
should reduce CPU usage even more since it won't have to split the SPI
transfers each time the interrupt handler is called.
The .update_scan_mode() callback hand to be moved to the buffer preenable
callback since the SPI transfer mode can't be changed after
spi_optimize_message() has been called. (The buffer postenable callback
can't be used because it happens after the trigger is enabled, so the
SPI message needs to be optimized before that.)
The indent of the pointer to ti_ads7950_read_raw() in the assignment
is changed since there is no longer anything else in the struct to
align with since removal of use of the pointer to
ti_ads7950_update_scan_mode().
Signed-off-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Convert the driver's remaining manual resource management to use the
devm_ infrastructure, allowing for the complete removal of the
ad799x_remove() function and the simplification of the probe error paths.
Specifically:
- Initialize the mutex using devm_mutex_init() and move it to the top
of probe() (before IRQ registration) to prevent a race condition where
an interrupt could attempt to take an uninitialized lock.
- Use devm_add_action_or_reset() to ensure that the VCC and VREF
regulators are disabled safely and in the correct order during driver
teardown or probe failure.
- Refactor the optional VREF error handling path for better readability.
- Convert iio_triggered_buffer_setup() and iio_device_register() to
their devm_ variants.
Because all resources are now managed by the devm core, the unwinding
order is guaranteed to follow the reverse order of allocation. All manual
error handling goto labels in ad799x_probe() have been removed.
Suggested-by: Jonathan Cameron <jic23@kernel.org>
Suggested-by: David Lechner <dlechner@baylibre.com>
Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Archit Anant <architanant5@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Since the reference voltage for this ADC is not expected to
change at runtime, determine the active reference voltage (either VREF
or VCC) during probe() and cache it in a single variable in the state
structure.
Suggested-by: Jonathan Cameron <jic23@kernel.org>
Suggested-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Archit Anant <architanant5@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Currently, rx_buf is dynamically allocated using kmalloc() every time
ad799x_update_scan_mode() is called. This can lead to memory leaks if
the scan mask is updated multiple times.
Drop the dynamic allocation and replace it with a static buffer at the
end of the state structure using IIO_DECLARE_BUFFER_WITH_TS().
This eliminates the allocation overhead, prevents leaks, and removes
the need for manual kfree() on driver removal.
Suggested-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Archit Anant <architanant5@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Introduce a local device pointer 'dev' in ad799x_probe() and use it
throughout the function instead of accessing &client->dev repeatedly.
Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Archit Anant <architanant5@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Reorder header includes to maintain proper alphabetical ordering.
No functional changes.
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Archit Anant <architanant5@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use a device-managed counterpart of iio_device_register() and remove the
redundant iio_device_unregister() call in driver remove function,
allowing us to remove vcnl4000_remove() function altogether.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Erikas Bitovtas <xerikasxx@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Replace pm_runtime_set_active() and pm_runtime_enable() with their
device-managed counterpart to remove them from vcnl4000_remove().
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Erikas Bitovtas <xerikasxx@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Move power state setting into a device-managed action to get rid of
fail_poweroff goto label and remove it from vcnl4000_remove() function.
Signed-off-by: Erikas Bitovtas <xerikasxx@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Make device tree entries one line each to save space and LOC.
Signed-off-by: Erikas Bitovtas <xerikasxx@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Instead of creating an enum table with chip IDs, store pointers to
structs directly. This drops the association between chip structs and
enum IDs and allows for easier addition or removal of new devices.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Erikas Bitovtas <xerikasxx@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Add a new field for vcnl4000_chip_spec and check if we have the right
device by that instead of the index from enum table. This leaves the
enum table being used only for picking the right vcnl4000_chip_spec,
allowing us to drop it later on.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Erikas Bitovtas <xerikasxx@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Add support for configuring the DAC gain using the GA bit
The MCP4821 supports two gain settings:
- 1x gain → 2.048V full-scale
- 2x gain → 4.096V full-scale
Scale write support is added in the IIO interface. Only scale
values advertised via the scale_available attribute are accepted,
ensuring consistency between the configured gain and exposed
scale values.
Signed-off-by: Nikhil Gautam <nikhilgtr@gmail.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Move the iio_priv() call outside the switch statement in
mcp4821_read_raw() to avoid repeating it in multiple cases.
No functional change.
Signed-off-by: Nikhil Gautam <nikhilgtr@gmail.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Fix a typo in the enum name mcp4821_supported_drvice_ids
by renaming it to mcp4821_supported_device_ids.
This improves code readability and consistency.
Signed-off-by: Nikhil Gautam <nikhilgtr@gmail.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Reported by checkpatch:
FILE: drivers/iio/common/ssp_sensors/ssp_spi.c
CHECK: Macro argument '...' may be better as '(...)'
to avoid precedence issues
Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Cleanup include headers by removing proxy kernel.h header and
unnecessary list.h, interrupt.h, workqueue.h and slab.h headers. Added
additional headers that were previously included from kernel.h.
Verified using the include-what-you-use tool.
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() to tie the mutex lifetime to the device and
improve debugging when CONFIG_DEBUG_MUTEXES is enabled.
Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() to tie the mutex lifetime to the device and
improve debugging when CONFIG_DEBUG_MUTEXES is enabled.
Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() to tie the mutex lifetime to the device and
improve debugging when CONFIG_DEBUG_MUTEXES is enabled.
Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() to tie the mutex lifetime to the device and
improve debugging when CONFIG_DEBUG_MUTEXES is enabled.
Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use devm_mutex_init() to tie the mutex lifetime to the device and
improve debugging when CONFIG_DEBUG_MUTEXES is enabled.
Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Remove unnecessary braces at single if statement block.
No functional change.
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Convert the in_voltage_scale_available and in_voltage_offset_available
attributes from legacy IIO_DEVICE_ATTR with custom show functions to the
IIO framework's read_avail callback. This uses the framework's built-in
support for _available attributes, removing the need for manual sysfs
formatting.
Precompute the available scale values at probe time since they depend on
the reference voltage which does not change after initialization.
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Gabriel Rondon <grondon@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Use dev_err_probe() instead of dev_err() in the probe path to ensure
proper handling of deferred probing and to simplify error handling.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Use dev_err_probe() instead of dev_err() in the probe path to ensure
proper handling of deferred probing and to simplify error handling.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Reviewed-by: Tomas Melin <tomas.melin@vaisala.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Use dev_err_probe() instead of dev_err() in the probe path to ensure
proper handling of deferred probing and to simplify error handling.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
