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iio: imu: inv_mpu6050: add new interrupt handler for WoM events

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Add new interrupt handler for generating WoM event from int status register
bits. Launch from interrupt the trigger poll function for data buffer.

Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Link: https://lore.kernel.org/r/20240311160557.437337-4-inv.git-commit@tdk.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Jean-Baptiste Maneyrol 2024-03-11 16:05:56 +00:00 committed by Jonathan Cameron
parent d0e79bebce
commit 5537f653d9
3 changed files with 66 additions and 16 deletions
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2
drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
View File

@ -185,6 +185,7 @@ struct inv_mpu6050_hw {
* @magn_orient: magnetometer sensor chip orientation if available.
* @suspended_sensors: sensors mask of sensors turned off for suspend
* @data: read buffer used for bulk reads.
* @it_timestamp: interrupt timestamp.
*/
struct inv_mpu6050_state {
struct mutex lock;
@ -210,6 +211,7 @@ struct inv_mpu6050_state {
unsigned int suspended_sensors;
bool level_shifter;
u8 *data;
s64 it_timestamp;
};
/*register and associated bit definition*/

11
drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
View File

@ -51,21 +51,10 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p)
u32 fifo_period;
s64 timestamp;
u8 data[INV_MPU6050_OUTPUT_DATA_SIZE];
int int_status;
size_t i, nb;
mutex_lock(&st->lock);
/* ack interrupt and check status */
result = regmap_read(st->map, st->reg->int_status, &int_status);
if (result) {
dev_err(regmap_get_device(st->map),
"failed to ack interrupt\n");
goto flush_fifo;
}
if (!(int_status & INV_MPU6050_BIT_RAW_DATA_RDY_INT))
goto end_session;
if (!(st->chip_config.accl_fifo_enable |
st->chip_config.gyro_fifo_enable |
st->chip_config.magn_fifo_enable))

69
drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
View File

@ -6,6 +6,7 @@
#include <linux/pm_runtime.h>
#include <linux/iio/common/inv_sensors_timestamp.h>
#include <linux/iio/events.h>
#include "inv_mpu_iio.h"
@ -228,6 +229,65 @@ static const struct iio_trigger_ops inv_mpu_trigger_ops = {
.set_trigger_state = &inv_mpu_data_rdy_trigger_set_state,
};
static irqreturn_t inv_mpu6050_interrupt_timestamp(int irq, void *p)
{
struct iio_dev *indio_dev = p;
struct inv_mpu6050_state *st = iio_priv(indio_dev);
st->it_timestamp = iio_get_time_ns(indio_dev);
return IRQ_WAKE_THREAD;
}
static irqreturn_t inv_mpu6050_interrupt_handle(int irq, void *p)
{
struct iio_dev *indio_dev = p;
struct inv_mpu6050_state *st = iio_priv(indio_dev);
unsigned int int_status, wom_bits;
u64 ev_code;
int result;
switch (st->chip_type) {
case INV_MPU6050:
case INV_MPU6500:
case INV_MPU6515:
case INV_MPU6880:
case INV_MPU6000:
case INV_MPU9150:
case INV_MPU9250:
case INV_MPU9255:
wom_bits = INV_MPU6500_BIT_WOM_INT;
break;
default:
wom_bits = INV_ICM20608_BIT_WOM_INT;
break;
}
scoped_guard(mutex, &st->lock) {
/* ack interrupt and check status */
result = regmap_read(st->map, st->reg->int_status, &int_status);
if (result) {
dev_err(regmap_get_device(st->map), "failed to ack interrupt\n");
return IRQ_HANDLED;
}
/* handle WoM event */
if (st->chip_config.wom_en && (int_status & wom_bits)) {
ev_code = IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
IIO_EV_TYPE_ROC, IIO_EV_DIR_RISING);
iio_push_event(indio_dev, ev_code, st->it_timestamp);
}
}
/* handle raw data interrupt */
if (int_status & INV_MPU6050_BIT_RAW_DATA_RDY_INT) {
indio_dev->pollfunc->timestamp = st->it_timestamp;
iio_trigger_poll_nested(st->trig);
}
return IRQ_HANDLED;
}
int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type)
{
int ret;
@ -240,11 +300,10 @@ int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type)
if (!st->trig)
return -ENOMEM;
ret = devm_request_irq(&indio_dev->dev, st->irq,
&iio_trigger_generic_data_rdy_poll,
irq_type,
"inv_mpu",
st->trig);
ret = devm_request_threaded_irq(&indio_dev->dev, st->irq,
&inv_mpu6050_interrupt_timestamp,
&inv_mpu6050_interrupt_handle,
irq_type, "inv_mpu", indio_dev);
if (ret)
return ret;