From: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@xxxxxxx>
Add channel attributes "power_mode" and "power_mode_available" for
setting accel power mode (low-noise or low-power).
Differents ODRs and filter are possible depending on the power mode.
Thus make ODRs and filter dynamic and check values when applying.
---
drivers/iio/imu/inv_icm42600/inv_icm42600.h | 12 +
.../iio/imu/inv_icm42600/inv_icm42600_accel.c | 230 ++++++++++++++----
.../iio/imu/inv_icm42600/inv_icm42600_core.c | 33 +++
3 files changed, 226 insertions(+), 49 deletions(-)
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600.h b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
index c4ac91f6bafe..83219088e697 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600.h
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
@@ -177,11 +177,23 @@ struct inv_icm42600_state {
* struct inv_icm42600_sensor_state - sensor state variables
* @scales: table of scales.
* @scales_len: length (nb of items) of the scales table.
+ * @odrs: table of odrs.
+ * @odrs_len: lenght (nb of items) of the odrs table.
+ * @odr_convs: conversion table of odrs from Hz to register value.
+ * @odr_convs_len: lenght (nb of items) of the odr_convs table.
+ * @running_mode: sensor running mode (low power or low noise).
+ * @filter: sensor filter.
* @ts: timestamp module states.
*/
struct inv_icm42600_sensor_state {
const int *scales;
size_t scales_len;
+ const int *odrs;
+ size_t odrs_len;
+ const int *odr_convs;
+ size_t odr_convs_len;
+ enum inv_icm42600_sensor_mode running_mode;
+ enum inv_icm42600_filter filter;
struct inv_sensors_timestamp ts;
};
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
index 83d8504ebfff..d76288dee225 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
@@ -55,8 +55,158 @@ enum inv_icm42600_accel_scan {
INV_ICM42600_ACCEL_SCAN_TIMESTAMP,
};
+/* IIO format int + micro */
+static const int inv_icm42600_accel_ln_odrs[] = {
+ /* 12.5Hz */
+ 12, 500000,
+ /* 25Hz */
+ 25, 0,
+ /* 50Hz */
+ 50, 0,
+ /* 100Hz */
+ 100, 0,
+ /* 200Hz */
+ 200, 0,
+ /* 1kHz */
+ 1000, 0,
+ /* 2kHz */
+ 2000, 0,
+ /* 4kHz */
+ 4000, 0,
+};
+static const int inv_icm42600_accel_lp_odrs[] = {
+ /* 1.5625Hz */
+ 1, 562500,
+ /* 3.125Hz */
+ 3, 125000,
+ /* 6.25Hz */
+ 6, 250000,
+ /* 12.5Hz */
+ 12, 500000,
+ /* 25Hz */
+ 25, 0,
+ /* 50Hz */
+ 50, 0,
+ /* 100Hz */
+ 100, 0,
+ /* 200Hz */
+ 200, 0,
+};
+
+static const int inv_icm42600_accel_ln_odr_convs[] = {
+ INV_ICM42600_ODR_12_5HZ,
+ INV_ICM42600_ODR_25HZ,
+ INV_ICM42600_ODR_50HZ,
+ INV_ICM42600_ODR_100HZ,
+ INV_ICM42600_ODR_200HZ,
+ INV_ICM42600_ODR_1KHZ_LN,
+ INV_ICM42600_ODR_2KHZ_LN,
+ INV_ICM42600_ODR_4KHZ_LN,
+};
+static const int inv_icm42600_accel_lp_odr_convs[] = {
+ INV_ICM42600_ODR_1_5625HZ_LP,
+ INV_ICM42600_ODR_3_125HZ_LP,
+ INV_ICM42600_ODR_6_25HZ_LP,
+ INV_ICM42600_ODR_12_5HZ,
+ INV_ICM42600_ODR_25HZ,
+ INV_ICM42600_ODR_50HZ,
+ INV_ICM42600_ODR_100HZ,
+ INV_ICM42600_ODR_200HZ,
+};
+
+static const char * const inv_icm42600_accel_power_mode_items[] = {
+ "low-noise",
+ "low-power",
+};
+static const int inv_icm42600_accel_power_mode_values[] = {
+ INV_ICM42600_SENSOR_MODE_LOW_NOISE,
+ INV_ICM42600_SENSOR_MODE_LOW_POWER,
+};
+static const int inv_icm42600_accel_filter_values[] = {
+ INV_ICM42600_FILTER_BW_ODR_DIV_2,
+ INV_ICM42600_FILTER_AVG_16X,
+};
+static const int *inv_icm42600_accel_odrs[] = {
+ inv_icm42600_accel_ln_odrs,
+ inv_icm42600_accel_lp_odrs,
+};
+static size_t inv_icm42600_accel_odrs_len[] = {
+ ARRAY_SIZE(inv_icm42600_accel_ln_odrs),
+ ARRAY_SIZE(inv_icm42600_accel_lp_odrs),
+};
+static const int *inv_icm42600_accel_odr_convs[] = {
+ inv_icm42600_accel_ln_odr_convs,
+ inv_icm42600_accel_lp_odr_convs,
+};
+static size_t inv_icm42600_accel_odr_convs_len[] = {
+ ARRAY_SIZE(inv_icm42600_accel_ln_odr_convs),
+ ARRAY_SIZE(inv_icm42600_accel_lp_odr_convs),
+};
+
+static int inv_icm42600_accel_power_mode_set(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ unsigned int idx)
+{
+ struct inv_icm42600_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42600_sensor_state *accel_st = iio_priv(indio_dev);
+
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ if (idx >= ARRAY_SIZE(inv_icm42600_accel_power_mode_values))
+ return -EINVAL;
+
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+
+ guard(mutex)(&st->lock);
+
+ accel_st->odrs = inv_icm42600_accel_odrs[idx];
+ accel_st->odrs_len = inv_icm42600_accel_odrs_len[idx];
+ accel_st->odr_convs = inv_icm42600_accel_odr_convs[idx];
+ accel_st->odr_convs_len = inv_icm42600_accel_odr_convs_len[idx];
+ accel_st->running_mode = inv_icm42600_accel_power_mode_values[idx];
+ accel_st->filter = inv_icm42600_accel_filter_values[idx];
+
+ return 0;
+}
+
+static int inv_icm42600_accel_power_mode_get(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct inv_icm42600_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42600_sensor_state *accel_st = iio_priv(indio_dev);
+ unsigned int idx;
+
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ guard(mutex)(&st->lock);
+
+ for (idx = 0; idx < ARRAY_SIZE(inv_icm42600_accel_power_mode_values); ++idx) {
+ if (accel_st->running_mode ==
+ inv_icm42600_accel_power_mode_values[idx])
+ break;
+ }
+ if (idx >= ARRAY_SIZE(inv_icm42600_accel_power_mode_values))
+ return -EINVAL;
+
+ return idx;
+}
+
+static const struct iio_enum inv_icm42600_accel_power_mode_enum = {
+ .items = inv_icm42600_accel_power_mode_items,
+ .num_items = ARRAY_SIZE(inv_icm42600_accel_power_mode_items),
+ .set = inv_icm42600_accel_power_mode_set,
+ .get = inv_icm42600_accel_power_mode_get,
+};
+
static const struct iio_chan_spec_ext_info inv_icm42600_accel_ext_infos[] = {
IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, inv_icm42600_get_mount_matrix),
+ IIO_ENUM_AVAILABLE("power_mode", IIO_SHARED_BY_TYPE,
+ &inv_icm42600_accel_power_mode_enum),
+ IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE,
+ &inv_icm42600_accel_power_mode_enum),
{},
};
@@ -120,7 +270,8 @@ static int inv_icm42600_accel_update_scan_mode(struct iio_dev *indio_dev,
if (*scan_mask & INV_ICM42600_SCAN_MASK_ACCEL_3AXIS) {
/* enable accel sensor */
- conf.mode = INV_ICM42600_SENSOR_MODE_LOW_NOISE;
+ conf.mode = accel_st->running_mode;
+ conf.filter = accel_st->filter;
ret = inv_icm42600_set_accel_conf(st, &conf, &sleep_accel);
if (ret)
goto out_unlock;
@@ -144,10 +295,12 @@ static int inv_icm42600_accel_update_scan_mode(struct iio_dev *indio_dev,
return ret;
}
-static int inv_icm42600_accel_read_sensor(struct inv_icm42600_state *st,
+static int inv_icm42600_accel_read_sensor(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int16_t *val)
{
+ struct inv_icm42600_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42600_sensor_state *accel_st = iio_priv(indio_dev);
struct device *dev = regmap_get_device(st->map);
struct inv_icm42600_sensor_conf conf = INV_ICM42600_SENSOR_CONF_INIT;
unsigned int reg;
@@ -175,7 +328,8 @@ static int inv_icm42600_accel_read_sensor(struct inv_icm42600_state *st,
mutex_lock(&st->lock);
/* enable accel sensor */
- conf.mode = INV_ICM42600_SENSOR_MODE_LOW_NOISE;
+ conf.mode = accel_st->running_mode;
+ conf.filter = accel_st->filter;
ret = inv_icm42600_set_accel_conf(st, &conf, NULL);
if (ret)
goto exit;
@@ -275,54 +429,25 @@ static int inv_icm42600_accel_write_scale(struct iio_dev *indio_dev,
return ret;
}
-/* IIO format int + micro */
-static const int inv_icm42600_accel_odr[] = {
- /* 12.5Hz */
- 12, 500000,
- /* 25Hz */
- 25, 0,
- /* 50Hz */
- 50, 0,
- /* 100Hz */
- 100, 0,
- /* 200Hz */
- 200, 0,
- /* 1kHz */
- 1000, 0,
- /* 2kHz */
- 2000, 0,
- /* 4kHz */
- 4000, 0,
-};
-
-static const int inv_icm42600_accel_odr_conv[] = {
- INV_ICM42600_ODR_12_5HZ,
- INV_ICM42600_ODR_25HZ,
- INV_ICM42600_ODR_50HZ,
- INV_ICM42600_ODR_100HZ,
- INV_ICM42600_ODR_200HZ,
- INV_ICM42600_ODR_1KHZ_LN,
- INV_ICM42600_ODR_2KHZ_LN,
- INV_ICM42600_ODR_4KHZ_LN,
-};
-
-static int inv_icm42600_accel_read_odr(struct inv_icm42600_state *st,
+static int inv_icm42600_accel_read_odr(struct iio_dev *indio_dev,
int *val, int *val2)
{
+ struct inv_icm42600_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42600_sensor_state *accel_st = iio_priv(indio_dev);
unsigned int odr;
unsigned int i;
odr = st->conf.accel.odr;
- for (i = 0; i < ARRAY_SIZE(inv_icm42600_accel_odr_conv); ++i) {
- if (inv_icm42600_accel_odr_conv[i] == odr)
+ for (i = 0; i < accel_st->odr_convs_len; ++i) {
+ if (accel_st->odr_convs[i] == odr)
break;
}
- if (i >= ARRAY_SIZE(inv_icm42600_accel_odr_conv))
+ if (i >= accel_st->odr_convs_len)
return -EINVAL;
- *val = inv_icm42600_accel_odr[2 * i];
- *val2 = inv_icm42600_accel_odr[2 * i + 1];
+ *val = accel_st->odrs[2 * i];
+ *val2 = accel_st->odrs[2 * i + 1];
return IIO_VAL_INT_PLUS_MICRO;
}
@@ -338,15 +463,15 @@ static int inv_icm42600_accel_write_odr(struct iio_dev *indio_dev,
struct inv_icm42600_sensor_conf conf = INV_ICM42600_SENSOR_CONF_INIT;
int ret;
- for (idx = 0; idx < ARRAY_SIZE(inv_icm42600_accel_odr); idx += 2) {
- if (val == inv_icm42600_accel_odr[idx] &&
- val2 == inv_icm42600_accel_odr[idx + 1])
+ for (idx = 0; idx < accel_st->odrs_len; idx += 2) {
+ if (val == accel_st->odrs[idx] &&
+ val2 == accel_st->odrs[idx + 1])
break;
}
- if (idx >= ARRAY_SIZE(inv_icm42600_accel_odr))
+ if (idx >= accel_st->odrs_len)
return -EINVAL;
- conf.odr = inv_icm42600_accel_odr_conv[idx / 2];
+ conf.odr = accel_st->odr_convs[idx / 2];
pm_runtime_get_sync(dev);
mutex_lock(&st->lock);
@@ -581,7 +706,7 @@ static int inv_icm42600_accel_read_raw(struct iio_dev *indio_dev,
ret = iio_device_claim_direct_mode(indio_dev);
if (ret)
return ret;
- ret = inv_icm42600_accel_read_sensor(st, chan, &data);
+ ret = inv_icm42600_accel_read_sensor(indio_dev, chan, &data);
iio_device_release_direct_mode(indio_dev);
if (ret)
return ret;
@@ -590,7 +715,7 @@ static int inv_icm42600_accel_read_raw(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_SCALE:
return inv_icm42600_accel_read_scale(indio_dev, val, val2);
case IIO_CHAN_INFO_SAMP_FREQ:
- return inv_icm42600_accel_read_odr(st, val, val2);
+ return inv_icm42600_accel_read_odr(indio_dev, val, val2);
case IIO_CHAN_INFO_CALIBBIAS:
return inv_icm42600_accel_read_offset(st, chan, val, val2);
default:
@@ -615,9 +740,9 @@ static int inv_icm42600_accel_read_avail(struct iio_dev *indio_dev,
*length = accel_st->scales_len;
return IIO_AVAIL_LIST;
case IIO_CHAN_INFO_SAMP_FREQ:
- *vals = inv_icm42600_accel_odr;
+ *vals = accel_st->odrs;
*type = IIO_VAL_INT_PLUS_MICRO;
- *length = ARRAY_SIZE(inv_icm42600_accel_odr);
+ *length = accel_st->odrs_len;
return IIO_AVAIL_LIST;
case IIO_CHAN_INFO_CALIBBIAS:
*vals = inv_icm42600_accel_calibbias;
@@ -754,6 +879,13 @@ struct iio_dev *inv_icm42600_accel_init(struct inv_icm42600_state *st)
accel_st->scales_len = ARRAY_SIZE(inv_icm42600_accel_scale);
break;
}
+ /* low-noise mode and ODRs at init */
+ accel_st->odrs = inv_icm42600_accel_ln_odrs;
+ accel_st->odrs_len = ARRAY_SIZE(inv_icm42600_accel_ln_odrs);
+ accel_st->odr_convs = inv_icm42600_accel_ln_odr_convs;
+ accel_st->odr_convs_len = ARRAY_SIZE(inv_icm42600_accel_ln_odr_convs);
+ accel_st->running_mode = INV_ICM42600_SENSOR_MODE_LOW_NOISE;
+ accel_st->filter = INV_ICM42600_FILTER_BW_ODR_DIV_2;
/*
* clock period is 32kHz (31250ns)
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
index 96116a68ab29..50380f2a5ebb 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
@@ -235,6 +235,7 @@ int inv_icm42600_set_accel_conf(struct inv_icm42600_state *st,
unsigned int *sleep_ms)
{
struct inv_icm42600_sensor_conf *oldconf = &st->conf.accel;
+ int min_odr, max_odr;
unsigned int val;
int ret;
@@ -248,6 +249,28 @@ int inv_icm42600_set_accel_conf(struct inv_icm42600_state *st,
if (conf->filter < 0)
conf->filter = oldconf->filter;
+ /* sanitize ODR setting against power mode */
+ switch (conf->mode) {
+ case INV_ICM42600_SENSOR_MODE_LOW_NOISE:
+ min_odr = INV_ICM42600_ODR_8KHZ_LN;
+ max_odr = INV_ICM42600_ODR_12_5HZ;
+ if (conf->odr < min_odr)
+ conf->odr = min_odr;
+ else if (conf->odr > max_odr)
+ conf->odr = max_odr;
+ break;
+ case INV_ICM42600_SENSOR_MODE_LOW_POWER:
+ min_odr = INV_ICM42600_ODR_200HZ;
+ max_odr = INV_ICM42600_ODR_1_5625HZ_LP;
+ if (conf->odr < min_odr)
+ conf->odr = min_odr;
+ else if (conf->odr > max_odr)
+ conf->odr = max_odr;
+ break;
+ default:
+ break;
+ }
+
/* set ACCEL_CONFIG0 register (accel fullscale & odr) */
if (conf->fs != oldconf->fs || conf->odr != oldconf->odr) {
val = INV_ICM42600_ACCEL_CONFIG0_FS(conf->fs) |
@@ -441,6 +464,16 @@ static int inv_icm42600_setup(struct inv_icm42600_state *st,
if (ret)
return ret;
+ /*
+ * Use RC clock for accel low-power to fix glitches when switching
+ * gyro on/off while accel low-power is on.
+ */
+ ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG1,
+ INV_ICM42600_INTF_CONFIG1_ACCEL_LP_CLK_RC,
+ INV_ICM42600_INTF_CONFIG1_ACCEL_LP_CLK_RC);
+ if (ret)
+ return ret;
+
return inv_icm42600_set_conf(st, hw->conf);
}
--
2.34.1
