kernel/git/stable/linux.git/drivers/iio/pressure/mpl3115.c, branch master

iio: Initialize i2c_device_id arrays using member names

2026-05-31T10:01:46+00:00

While being less compact, using named initializers allows to more easily see which members of the structs are assigned which value without having to lookup the declaration of the struct. And it's also more robust against changes to the struct definition. The mentioned robustness is relevant for a planned change to struct i2c_device_id that replaces .driver_data by an anonymous union. This patch doesn't modify the compiled arrays, only their representation in source form benefits. The former was confirmed with x86 and arm64 builds. Signed-off-by: Uwe Kleine-König (The Capable Hub) Reviewed-by: Siratul Islam Reviewed-by: Matti Vaittinen Signed-off-by: Jonathan Cameron

iio: mpl3115: add threshold events support

2025-11-15T18:06:47+00:00

Add support for pressure and temperature rising threshold events. For both channels *_en and *_value (in raw units) attributes are exposed. Since in write_event_config() the ctrl_reg1.active and ctrl_reg4 are modified, accessing the data->ctrl_reg{1,4} in set_trigger_state() and write_event_config() needs to be now guarded by data->lock. Otherwise, it would be possible that 2 concurrent threads executing these functions would access the data->ctrl_reg{1,4} at the same time and then one would overwrite the other's result. Signed-off-by: Antoni Pokusinski Signed-off-by: Jonathan Cameron

iio: mpl3115: use get_unaligned_be24() to retrieve pressure data

2025-11-15T18:06:47+00:00

The pressure measurement result is arranged as 20-bit unsigned value residing in three 8-bit registers. Hence, it can be retrieved using get_unaligned_be24() and by applying 4-bit shift. Reviewed-by: Marcelo Schmitt Signed-off-by: Antoni Pokusinski Signed-off-by: Jonathan Cameron

iio: mpl3115: add support for sampling frequency

2025-10-19T10:59:17+00:00

When the device is in ACTIVE mode the temperature and pressure measurements are collected with a frequency determined by the ST[3:0] bits of CTRL_REG2 register. Reviewed-by: Nuno Sá Signed-off-by: Antoni Pokusinski Signed-off-by: Jonathan Cameron

iio: mpl3115: add support for DRDY interrupt

2025-10-19T10:59:17+00:00

MPL3115 sensor features a "data ready" interrupt which indicates the presence of new measurements. Signed-off-by: Antoni Pokusinski Signed-off-by: Jonathan Cameron

iio: mpl3115: rename CTRL_REG1 field macros

2025-10-19T10:59:16+00:00

Rename the bitfield macros of CTRL_REG1, so that their names clearly indicate their relation to CTRL_REG1. This is a preparation for introducing the support for the DRDY interrupt which requires the usage of other control registers. Signed-off-by: Antoni Pokusinski Signed-off-by: Jonathan Cameron

iio: mpl3115: add separate function for triggered buffer data collection

2025-10-19T10:59:16+00:00

Factor out the code responsible for collecting data for the triggered buffer from the trigger handler into a separate function. Signed-off-by: Antoni Pokusinski Signed-off-by: Jonathan Cameron

iio: pressure: mpl3115: use = { } instead of memset()

2025-06-26T18:32:57+00:00

Use { } instead of memset() to zero-initialize stack memory to simplify the code. Signed-off-by: David Lechner Reviewed-by: Nuno Sá Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/20250611-iio-zero-init-stack-with-instead-of-memset-v1-24-ebb2d0a24302@baylibre.com Signed-off-by: Jonathan Cameron

iio: pressure: Use iio_push_to_buffers_with_ts() to provide length for runtime checks.

2025-05-21T13:20:27+00:00

This new function allows us to perform debug checks in the helper to ensure that the overrun does not occur. Use it in all the simple cases where either a static buffer or a structure is used in the drivers. Reviewed-by: Matti Vaittinen # ROHM BM1390 Reviewed-by: David Lechner Link: https://patch.msgid.link/20250413103443.2420727-20-jic23@kernel.org Signed-off-by: Jonathan Cameron

iio: pressure: mpl3115: Switch to sparse friendly iio_device_claim/release_direct()

2025-04-22T18:10:00+00:00

These new functions allow sparse to find failures to release direct mode reducing chances of bugs over the claim_direct_mode() functions that are deprecated. Reviewed-by: David Lechner Reviewed-by: Marcelo Schmitt Link: https://patch.msgid.link/20250331121317.1694135-28-jic23@kernel.org Signed-off-by: Jonathan Cameron