Re: [PATCH v4 6/6] iio: imu: kmx61: Add support for any motion trigger

Daniel Baluta
2014-12-16T11:08:07Z

On Tue, Dec 16, 2014 at 1:19 AM, Hartmut Knaack <knaack.h@gmx.de> wrote:
> Daniel Baluta schrieb am 03.12.2014 um 14:31:
>> We use WUFE (Wake Up from Sleep Engine) and BTSE (Back to Sleep Engine)
>> to detect general motion input.
>>
> A few recommendations, issues and questions inline.
>> Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
>> ---
>> drivers/iio/imu/kmx61.c | 433 +++++++++++++++++++++++++++++++++++++++++++++++-
>> 1 file changed, 426 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/iio/imu/kmx61.c b/drivers/iio/imu/kmx61.c
>> index 0f6816a..972424b 100644
>> --- a/drivers/iio/imu/kmx61.c
>> +++ b/drivers/iio/imu/kmx61.c
>> @@ -20,6 +20,7 @@
>> #include <linux/pm_runtime.h>
>> #include <linux/iio/iio.h>
>> #include <linux/iio/sysfs.h>
>> +#include <linux/iio/events.h>
>> #include <linux/iio/trigger.h>
>> #include <linux/iio/buffer.h>
>> #include <linux/iio/triggered_buffer.h>
>> @@ -30,6 +31,8 @@
>> #define KMX61_IRQ_NAME "kmx61_event"
>>
>> #define KMX61_REG_WHO_AM_I 0x00
>> +#define KMX61_REG_INS1 0x01
>> +#define KMX61_REG_INS2 0x02
>>
>> /*
>> * three 16-bit accelerometer output registers for X/Y/Z axis
>> @@ -63,20 +66,36 @@
>> #define KMX61_REG_INL 0x28
>> #define KMX61_REG_STBY 0x29
>> #define KMX61_REG_CTRL1 0x2A
>> +#define KMX61_REG_CTRL2 0x2B
>> #define KMX61_REG_ODCNTL 0x2C
>> #define KMX61_REG_INC1 0x2D
>>
>> +#define KMX61_REG_WUF_THRESH 0x3D
>> +#define KMX61_REG_WUF_TIMER 0x3E
>> +
>> #define KMX61_ACC_STBY_BIT BIT(0)
>> #define KMX61_MAG_STBY_BIT BIT(1)
>> #define KMX61_ACT_STBY_BIT BIT(7)
>>
>> #define KMX61_ALL_STBY (KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT)
>>
>> +#define KMX61_REG_INS1_BIT_WUFS BIT(1)
>> +
>> +#define KMX61_REG_INS2_BIT_ZP BIT(0)
>> +#define KMX61_REG_INS2_BIT_ZN BIT(1)
>> +#define KMX61_REG_INS2_BIT_YP BIT(2)
>> +#define KMX61_REG_INS2_BIT_YN BIT(3)
>> +#define KMX61_REG_INS2_BIT_XP BIT(4)
>> +#define KMX61_REG_INS2_BIT_XN BIT(5)
>> +
>> #define KMX61_REG_CTRL1_GSEL_MASK 0x03
>>
>> #define KMX61_REG_CTRL1_BIT_RES BIT(4)
>> #define KMX61_REG_CTRL1_BIT_DRDYE BIT(5)
>> +#define KMX61_REG_CTRL1_BIT_WUFE BIT(6)
>> +#define KMX61_REG_CTRL1_BIT_BTSE BIT(7)
>>
>> +#define KMX61_REG_INC1_BIT_WUFS BIT(0)
>> #define KMX61_REG_INC1_BIT_DRDYM BIT(1)
>> #define KMX61_REG_INC1_BIT_DRDYA BIT(2)
>> #define KMX61_REG_INC1_BIT_IEN BIT(5)
>> @@ -86,6 +105,11 @@
>> #define KMX61_ACC_ODR_MASK 0x0F
>> #define KMX61_MAG_ODR_MASK 0xF0
>>
>> +#define KMX61_OWUF_MASK 0x7
>> +
>> +#define KMX61_DEFAULT_WAKE_THRESH 1
>> +#define KMX61_DEFAULT_WAKE_DURATION 1
>> +
>> #define KMX61_SLEEP_DELAY_MS 2000
>>
>> #define KMX61_CHIP_ID 0x12
>> @@ -111,11 +135,16 @@ struct kmx61_data {
>> /* config bits */
>> u8 range;
>> u8 odr_bits;
>> + u8 wake_thresh;
>> + u8 wake_duration;
>>
>> /* accelerometer specific data */
>> struct iio_dev *acc_indio_dev;
>> struct iio_trigger *acc_dready_trig;
>> + struct iio_trigger *motion_trig;
>> bool acc_dready_trig_on;
>> + bool motion_trig_on;
>> + bool ev_enable_state;
>>
>> /* magnetometer specific data */
>> struct iio_dev *mag_indio_dev;
>> @@ -154,6 +183,23 @@ static const struct {
>> {3, 125000, 0x0A},
>> {6, 250000, 0x0B} };
>>
>> +static const struct {
>> + int val;
>> + int val2;
>> + int odr_bits;
>> +} kmx61_wake_up_odr_table[] = { {0, 781000, 0x00},
>> + {1, 563000, 0x01},
>> + {3, 125000, 0x02},
>> + {6, 250000, 0x03},
>> + {12, 500000, 0x04},
>> + {25, 0, 0x05},
>> + {50, 0, 0x06},
>> + {100, 0, 0x06},
>> + {200, 0, 0x06},
>> + {400, 0, 0x06},
>> + {800, 0, 0x06},
>> + {1600, 0, 0x06} };
> Is it intentional, that values above 50 share the same odr_bits?

Yes, this is as intended. I followed the idea from kxcjk-1013 driver.
Experimenting with ODR of > 50HZ makes no benefit to system c states.

>> +
>> static IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326");
>> static IIO_CONST_ATTR(magn_scale_available, "0.001465");
>> static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
>> @@ -179,6 +225,14 @@ static const struct attribute_group kmx61_mag_attribute_group = {
>> .attrs = kmx61_mag_attributes,
>> };
>>
>> +static const struct iio_event_spec kmx61_event = {
>> + .type = IIO_EV_TYPE_THRESH,
>> + .dir = IIO_EV_DIR_EITHER,
>> + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
>> + BIT(IIO_EV_INFO_ENABLE) |
>> + BIT(IIO_EV_INFO_PERIOD),
>> +};
>> +
>> #define KMX61_ACC_CHAN(_axis) { \
>> .type = IIO_ACCEL, \
>> .modified = 1, \
>> @@ -195,6 +249,8 @@ static const struct attribute_group kmx61_mag_attribute_group = {
>> .shift = 4, \
>> .endianness = IIO_LE, \
>> }, \
>> + .event_spec = &kmx61_event, \
>> + .num_event_specs = 1 \
>> }
>>
>> #define KMX61_MAG_CHAN(_axis) { \
>> @@ -250,6 +306,31 @@ static int kmx61_convert_freq_to_bit(int val, int val2)
>> return -EINVAL;
>> }
>>
>> +static int kmx61_convert_bit_to_freq(u8 odr_bits, int *val, int *val2)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++)
>> + if (odr_bits == kmx61_samp_freq_table[i].odr_bits) {
>> + *val = kmx61_samp_freq_table[i].val;
>> + *val2 = kmx61_samp_freq_table[i].val2;
>> + return 0;
>> + }
>> + return -EINVAL;
> Given that kmx61_samp_freq_table[].odr_bits is practically representing the
> index, it could be handled in the way that we did when accessing
> kmx61_uscale_table. Just check odr_bits to be in range of valid indexes and
> then access the tables' elements with odr_bits used as index.
> Not sure, why I didn't mention it on my first review - maybe I thought you
> would pick it up by yourself if you liked the idea with the _scale_table.

Oh, ok.

>> +}
>> +
>> +
>> +static int kmx61_convert_wake_up_odr_to_bit(int val, int val2)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i)
>> + if (kmx61_wake_up_odr_table[i].val == val &&
>> + kmx61_wake_up_odr_table[i].val2 == val2)
>> + return kmx61_wake_up_odr_table[i].odr_bits;
>> + return -EINVAL;
>> +}
>> +
>> /**
>> * kmx61_set_mode() - set KMX61 device operating mode
>> * @data - kmx61 device private data pointer
>> @@ -338,6 +419,21 @@ static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device)
>> return 0;
>> }
>>
>> +int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2)
>> +{
>> + int ret, odr_bits;
>> +
>> + odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2);
>> + if (odr_bits < 0)
>> + return odr_bits;
>> +
>> + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2,
>> + odr_bits);
>> + if (ret < 0)
>> + dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
>> + return ret;
>> +}
>> +
>> static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device)
>> {
>> int ret;
>> @@ -369,6 +465,12 @@ static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device)
>> if (ret < 0)
>> return ret;
>>
>> + if (device & KMX61_ACC) {
>> + ret = kmx61_set_wake_up_odr(data, val, val2);
>> + if (ret)
>> + return ret;
>> + }
>> +
>> return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
>> }
>>
>> @@ -449,7 +551,7 @@ static int kmx61_set_scale(struct kmx61_data *data, u16 uscale)
>>
>> static int kmx61_chip_init(struct kmx61_data *data)
>> {
>> - int ret;
>> + int ret, val, val2;
>>
>> ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_WHO_AM_I);
>> if (ret < 0) {
>> @@ -476,11 +578,23 @@ static int kmx61_chip_init(struct kmx61_data *data)
>> }
>> data->odr_bits = ret;
>>
>> + /* set output data rate for wake up (motion detection) function */
>> + ret = kmx61_convert_bit_to_freq(data->odr_bits, &val, &val2);
>> + if (ret < 0)
>> + return ret;
>> +
>> + ret = kmx61_set_wake_up_odr(data, val, val2);
>> + if (ret < 0)
>> + return ret;
>> +
>> /* set acc/magn to OPERATION mode */
>> ret = kmx61_set_mode(data, 0, KMX61_ACC | KMX61_MAG, true);
>> if (ret < 0)
>> return ret;
>>
>> + data->wake_thresh = KMX61_DEFAULT_WAKE_THRESH;
>> + data->wake_duration = KMX61_DEFAULT_WAKE_DURATION;
>> +
>> return 0;
>> }
>>
>> @@ -547,6 +661,87 @@ static int kmx61_setup_new_data_interrupt(struct kmx61_data *data,
>> return 0;
>> }
>>
>> +static int kmx61_chip_update_thresholds(struct kmx61_data *data)
>> +{
>> + int ret;
>> +
>> + ret = i2c_smbus_write_byte_data(data->client,
>> + KMX61_REG_WUF_TIMER,
>> + data->wake_duration);
>> + if (ret < 0) {
>> + dev_err(&data->client->dev, "Errow writing reg_wuf_timer\n");
>> + return ret;
>> + }
>> +
>> + ret = i2c_smbus_write_byte_data(data->client,
>> + KMX61_REG_WUF_THRESH,
>> + data->wake_thresh);
>> + if (ret < 0) {
>> + dev_err(&data->client->dev, "Error writing reg_wuf_thresh\n");
>> + return ret;
>> + }
>> +
>> + return 0;
> Like in kmx61_set_wake_up_odr, you could return ret here and drop it in the
> last error handler.

ok.

>> +}
>> +
>> +static int kmx61_setup_any_motion_interrupt(struct kmx61_data *data,
>> + bool status, u8 device)
> device is unused in this function.
>> +{
>> + u8 mode;
>> + int ret;
>> +
>> + ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
>> + if (ret < 0)
>> + return ret;
>> +
>> + ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
>> + if (ret < 0)
>> + return ret;
>> +
>> + ret = kmx61_chip_update_thresholds(data);
>> + if (ret < 0)
>> + return ret;
>> +
>> + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1);
>> + if (ret < 0) {
>> + dev_err(&data->client->dev, "Error reading reg_inc1\n");
>> + return ret;
>> + }
>> + if (status)
>> + ret |= (KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);
>> + else
>> + ret &= ~(KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);
>> +
>> + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret);
>> + if (ret < 0) {
>> + dev_err(&data->client->dev, "Error writing reg_inc1\n");
>> + return ret;
>> + }
>> +
>> + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
>> + if (ret < 0) {
>> + dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
>> + return ret;
>> + }
>> +
>> + if (status)
>> + ret |= KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE;
>> + else
>> + ret &= ~(KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE);
>> +
>> + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
>> + if (ret < 0) {
>> + dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
>> + return ret;
>> + }
>> + mode |= KMX61_ACT_STBY_BIT;
>> + ret = kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
> Just like in the end of kmx61_set_odr(): return kmx61_set_mode(...);

ok.

>> +}
>> +
>> /**
>> * kmx61_set_power_state() - set power state for kmx61 @device
>> * @data - kmx61 device private pointer
>> @@ -707,12 +902,111 @@ static int kmx61_write_raw(struct iio_dev *indio_dev,
>> }
>> }
>>
>> +static int kmx61_read_event(struct iio_dev *indio_dev,
>> + const struct iio_chan_spec *chan,
>> + enum iio_event_type type,
>> + enum iio_event_direction dir,
>> + enum iio_event_info info,
>> + int *val, int *val2)
>> +{
>> + struct kmx61_data *data = kmx61_get_data(indio_dev);
>> +
>> + *val2 = 0;
>> + switch (info) {
>> + case IIO_EV_INFO_VALUE:
>> + *val = data->wake_thresh;
>> + break;
>> + case IIO_EV_INFO_PERIOD:
>> + *val = data->wake_duration;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return IIO_VAL_INT;
> Stylewise, we usually put the return IIO_VAL_INT (or similar) inside each case
> if there is nothing more to be done (like unlocking mutexes, ...). Makes it
> slightly more obvious, what type the data is supposed to be.
>> +}
ok.

>> +
>> +static int kmx61_write_event(struct iio_dev *indio_dev,
>> + const struct iio_chan_spec *chan,
>> + enum iio_event_type type,
>> + enum iio_event_direction dir,
>> + enum iio_event_info info,
>> + int val, int val2)
> Parameters should be indented one more space.
ok.
>> +{
>> + struct kmx61_data *data = kmx61_get_data(indio_dev);
>> +
>> + if (data->ev_enable_state)
>> + return -EBUSY;
>> +
>> + switch (info) {
>> + case IIO_EV_INFO_VALUE:
>> + data->wake_thresh = val;
>> + break;
>> + case IIO_EV_INFO_PERIOD:
>> + data->wake_duration = val;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return IIO_VAL_INT;
> Same here.
ok.
>> +}
>> +
>> +static int kmx61_read_event_config(struct iio_dev *indio_dev,
>> + const struct iio_chan_spec *chan,
>> + enum iio_event_type type,
>> + enum iio_event_direction dir)
>> +{
>> + struct kmx61_data *data = kmx61_get_data(indio_dev);
>> +
>> + return data->ev_enable_state;
>> +}
>> +
>> +static int kmx61_write_event_config(struct iio_dev *indio_dev,
>> + const struct iio_chan_spec *chan,
>> + enum iio_event_type type,
>> + enum iio_event_direction dir,
>> + int state)
> Parameters should be indented one more space.
ok.
>> +{
>> + struct kmx61_data *data = kmx61_get_data(indio_dev);
>> + int ret;
>> +
>> + if (state && data->ev_enable_state)
>> + return 0;
>> +
>> + mutex_lock(&data->lock);
>> +
>> + if (!state && data->motion_trig_on) {
>> + data->ev_enable_state = 0;
> Assign true/false to bools?
ok.
>> + mutex_unlock(&data->lock);
>> + return 0;
>> + }
>> +
>> + ret = kmx61_set_power_state(data, state, KMX61_ACC);
>> + if (ret < 0) {
>> + mutex_unlock(&data->lock);
>> + return ret;
>> + }
>> +
>> + ret = kmx61_setup_any_motion_interrupt(data, state, KMX61_ACC);
>> + if (ret < 0) {
>> + kmx61_set_power_state(data, false, KMX61_ACC);
>> + mutex_unlock(&data->lock);
>> + return ret;
>> + }
>> +
>> + data->ev_enable_state = state;
> You could place an error label here and return ret below to reduce some code
> repetition in the error handlers above.
>> + mutex_unlock(&data->lock);
>> +
>> + return 0;
>> +}
>> +
>> static int kmx61_acc_validate_trigger(struct iio_dev *indio_dev,
>> struct iio_trigger *trig)
>> {
>> struct kmx61_data *data = kmx61_get_data(indio_dev);
>>
>> - if (data->acc_dready_trig != trig)
>> + if (data->acc_dready_trig != trig && data->motion_trig != trig)
>> return -EINVAL;
>>
>> return 0;
>> @@ -734,6 +1028,10 @@ static const struct iio_info kmx61_acc_info = {
>> .read_raw = kmx61_read_raw,
>> .write_raw = kmx61_write_raw,
>> .attrs = &kmx61_acc_attribute_group,
>> + .read_event_value = kmx61_read_event,
>> + .write_event_value = kmx61_write_event,
>> + .read_event_config = kmx61_read_event_config,
>> + .write_event_config = kmx61_write_event_config,
>> .validate_trigger = kmx61_acc_validate_trigger,
>> };
>>
>> @@ -753,11 +1051,18 @@ static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig,
>> u8 device;
>>
>> struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
>> - struct kmx61_data *data = iio_priv(indio_dev);
>> + struct kmx61_data *data = kmx61_get_data(indio_dev);
> Oh well, fixing the issue I pointed out in your previous patch. LOL and ouch!
:)). That explains why the driver didn't crash when I tested it.

>>
>> mutex_lock(&data->lock);
>>
>> - if (data->acc_dready_trig == trig)
>> + if (!state && data->ev_enable_state && data->motion_trig_on) {
>> + data->motion_trig_on = false;
>> + mutex_unlock(&data->lock);
>> + return 0;
>> + }
>> +
>> +
>> + if (data->acc_dready_trig == trig || data->motion_trig)
> Wouldn't you want to compare data->motion_trig with trig?
This is a nice catch.

>> device = KMX61_ACC;
>> else
>> device = KMX61_MAG;
>> @@ -768,7 +1073,10 @@ static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig,
>> return ret;
>> }
>>
>> - ret = kmx61_setup_new_data_interrupt(data, state, device);
>> + if (data->acc_dready_trig == trig || data->mag_dready_trig == trig)
>> + ret = kmx61_setup_new_data_interrupt(data, state, device);
>> + else
>> + ret = kmx61_setup_any_motion_interrupt(data, state, KMX61_ACC);
>> if (ret < 0) {
>> kmx61_set_power_state(data, false, device);
>> mutex_unlock(&data->lock);
>> @@ -777,8 +1085,10 @@ static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig,
>>
>> if (data->acc_dready_trig == trig)
>> data->acc_dready_trig_on = state;
>> - else
>> + else if (data->mag_dready_trig == trig)
>> data->mag_dready_trig_on = state;
>> + else
>> + data->motion_trig_on = state;
>>
>> mutex_unlock(&data->lock);
>>
>> @@ -806,6 +1116,99 @@ static const struct iio_trigger_ops kmx61_trigger_ops = {
>> .owner = THIS_MODULE,
>> };
>>
>> +static irqreturn_t kmx61_event_handler(int irq, void *private)
>> +{
>> + struct kmx61_data *data = private;
>> + struct iio_dev *indio_dev = data->acc_indio_dev;
>> + int ret;
>> +
>> + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1);
>> + if (ret < 0) {
>> + dev_err(&data->client->dev, "Error reading reg_ins1\n");
>> + goto ack_intr;
>> + }
>> +
>> + if (ret & KMX61_REG_INS1_BIT_WUFS) {
>> + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2);
>> + if (ret < 0) {
>> + dev_err(&data->client->dev, "Error reading reg_ins2\n");
>> + goto ack_intr;
>> + }
>> +
>> + if (ret & KMX61_REG_INS2_BIT_XN)
>> + iio_push_event(indio_dev,
>> + IIO_MOD_EVENT_CODE(IIO_ACCEL,
>> + 0,
>> + IIO_MOD_X,
>> + IIO_EV_TYPE_THRESH,
>> + IIO_EV_DIR_FALLING),
>> + 0);
>> +
>> + if (ret & KMX61_REG_INS2_BIT_XP)
>> + iio_push_event(indio_dev,
>> + IIO_MOD_EVENT_CODE(IIO_ACCEL,
>> + 0,
>> + IIO_MOD_X,
>> + IIO_EV_TYPE_THRESH,
>> + IIO_EV_DIR_RISING),
>> + 0);
>> +
>> + if (ret & KMX61_REG_INS2_BIT_YN)
>> + iio_push_event(indio_dev,
>> + IIO_MOD_EVENT_CODE(IIO_ACCEL,
>> + 0,
>> + IIO_MOD_Y,
>> + IIO_EV_TYPE_THRESH,
>> + IIO_EV_DIR_FALLING),
>> + 0);
>> +
>> + if (ret & KMX61_REG_INS2_BIT_YP)
>> + iio_push_event(indio_dev,
>> + IIO_MOD_EVENT_CODE(IIO_ACCEL,
>> + 0,
>> + IIO_MOD_Y,
>> + IIO_EV_TYPE_THRESH,
>> + IIO_EV_DIR_RISING),
>> + 0);
>> +
>> + if (ret & KMX61_REG_INS2_BIT_ZN)
>> + iio_push_event(indio_dev,
>> + IIO_MOD_EVENT_CODE(IIO_ACCEL,
>> + 0,
>> + IIO_MOD_Z,
>> + IIO_EV_TYPE_THRESH,
>> + IIO_EV_DIR_FALLING),
>> + 0);
>> +
>> + if (ret & KMX61_REG_INS2_BIT_ZP)
>> + iio_push_event(indio_dev,
>> + IIO_MOD_EVENT_CODE(IIO_ACCEL,
>> + 0,
>> + IIO_MOD_Z,
>> + IIO_EV_TYPE_THRESH,
>> + IIO_EV_DIR_RISING),
>> + 0);
>> + }
>> +
>> +ack_intr:
>> + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
>> + if (ret < 0)
>> + dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
>> +
>> + ret |= KMX61_REG_CTRL1_BIT_RES;
>> + ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
>> + if (ret < 0)
>> + dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
> Typo: Error writing ...
ok.
>> +
>> + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
>> + if (ret < 0)
>> + dev_err(&data->client->dev, "Error reading reg_inl\n");
>> +
>> + ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1);
> Missing error handling/message here.
ok.
>> +
>> + return IRQ_HANDLED;
>> +}
>> +
>> static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private)
>> {
>> struct kmx61_data *data = private;
>> @@ -815,6 +1218,11 @@ static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private)
>> if (data->mag_dready_trig_on)
>> iio_trigger_poll(data->mag_dready_trig);
>>
>> + if (data->motion_trig_on)
>> + iio_trigger_poll(data->motion_trig);
>> +
>> + if (data->ev_enable_state)
>> + return IRQ_WAKE_THREAD;
>> return IRQ_HANDLED;
>> }
>>
>> @@ -982,7 +1390,7 @@ static int kmx61_probe(struct i2c_client *client,
>> if (client->irq >= 0) {
>> ret = devm_request_threaded_irq(&client->dev, client->irq,
>> kmx61_data_rdy_trig_poll,
>> - NULL,
>> + kmx61_event_handler,
>> IRQF_TRIGGER_RISING,
>> KMX61_IRQ_NAME,
>> data);
>> @@ -1003,6 +1411,14 @@ static int kmx61_probe(struct i2c_client *client,
>> goto err_trigger_unregister;
>> }
>>
>> + data->motion_trig =
>> + kmx61_trigger_setup(data, data->acc_indio_dev,
>> + "any-motion");
>> + if (IS_ERR(data->motion_trig)) {
>> + ret = PTR_ERR(data->motion_trig);
>> + goto err_trigger_unregister;
>> + }
>> +
>> ret = iio_triggered_buffer_setup(data->acc_indio_dev,
>> &iio_pollfunc_store_time,
>> kmx61_trigger_handler,
>> @@ -1060,6 +1476,8 @@ err_trigger_unregister:
>> iio_trigger_unregister(data->acc_dready_trig);
>> if (data->mag_dready_trig)
>> iio_trigger_unregister(data->mag_dready_trig);
>> + if (data->motion_trig)
>> + iio_trigger_unregister(data->motion_trig);
>> err_chip_uninit:
>> kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
>> return ret;
>> @@ -1081,6 +1499,7 @@ static int kmx61_remove(struct i2c_client *client)
>> iio_triggered_buffer_cleanup(data->mag_indio_dev);
>> iio_trigger_unregister(data->acc_dready_trig);
>> iio_trigger_unregister(data->mag_dready_trig);
>> + iio_trigger_unregister(data->motion_trig);
>> }
>>
>> mutex_lock(&data->lock);

Thanks a lot for the feedback, Hartmut!

Daniel.