Add event channels that controls the creation of motion events.
Tested on ISM330DLC
Signed-off-by: Sean Nyekjaer <sean@xxxxxxxxxx>
---
Changes since v4:
* Added check for event support
* Added registers for more devices that support this event
Changes since v5:
* Moved wakeup_src masks to PATCH 5/6
Changes since v6:
* None
Changes since v7:
* None
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 41 ++++
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 191 ++++++++++++++++++-
2 files changed, 228 insertions(+), 4 deletions(-)
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
index fefd9042590a..449c2798f7ed 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
@@ -12,6 +12,7 @@
#define ST_LSM6DSX_H
#include <linux/device.h>
+#include <linux/iio/iio.h>
#define ST_LSM6DS3_DEV_NAME "lsm6ds3"
#define ST_LSM6DS3H_DEV_NAME "lsm6ds3h"
@@ -54,6 +55,26 @@ enum st_lsm6dsx_hw_id {
* ST_LSM6DSX_TAGGED_SAMPLE_SIZE)
#define ST_LSM6DSX_SHIFT_VAL(val, mask) (((val) << __ffs(mask)) & (mask))
+#define ST_LSM6DSX_CHANNEL_ACC(chan_type, addr, mod, scan_idx) \
+{ \
+ .type = chan_type, \
+ .address = addr, \
+ .modified = 1, \
+ .channel2 = mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = scan_idx, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_LE, \
+ }, \
+ .event_spec = &st_lsm6dsx_event, \
+ .num_event_specs = 1, \
+}
+
#define ST_LSM6DSX_CHANNEL(chan_type, addr, mod, scan_idx) \
{ \
.type = chan_type, \
@@ -162,6 +183,11 @@ struct st_lsm6dsx_shub_settings {
u8 batch_en;
};
+struct st_lsm6dsx_event_settings {
+ struct st_lsm6dsx_reg enable_reg;
+ struct st_lsm6dsx_reg wakeup_reg;
+};
+
enum st_lsm6dsx_ext_sensor_id {
ST_LSM6DSX_ID_MAGN,
};
@@ -225,6 +251,9 @@ struct st_lsm6dsx_settings {
u8 wai;
u8 int1_addr;
u8 int2_addr;
+ u8 int1_func_addr;
+ u8 int2_func_addr;
+ u8 int_func_mask;
u8 reset_addr;
u16 max_fifo_size;
struct {
@@ -244,6 +273,7 @@ struct st_lsm6dsx_settings {
struct st_lsm6dsx_fifo_ops fifo_ops;
struct st_lsm6dsx_hw_ts_settings ts_settings;
struct st_lsm6dsx_shub_settings shub_settings;
+ struct st_lsm6dsx_event_settings event_settings;
};
enum st_lsm6dsx_sensor_id {
@@ -324,6 +354,10 @@ struct st_lsm6dsx_hw {
u8 ts_sip;
u8 sip;
+ u8 event_threshold;
+ bool enable_event;
+ struct st_lsm6dsx_reg irq_routing;
+
u8 *buff;
struct iio_dev *iio_devs[ST_LSM6DSX_ID_MAX];
@@ -331,6 +365,13 @@ struct st_lsm6dsx_hw {
const struct st_lsm6dsx_settings *settings;
};
+static const struct iio_event_spec st_lsm6dsx_event = {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE)
+};
+
static const unsigned long st_lsm6dsx_available_scan_masks[] = {0x7, 0x0};
extern const struct dev_pm_ops st_lsm6dsx_pm_ops;
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
index ef838206b30f..4198ba263d03 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
@@ -73,9 +73,9 @@
#define ST_LSM6DSX_REG_PP_OD_MASK BIT(4)
static const struct iio_chan_spec st_lsm6dsx_acc_channels[] = {
- ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x28, IIO_MOD_X, 0),
- ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x2a, IIO_MOD_Y, 1),
- ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x2c, IIO_MOD_Z, 2),
+ ST_LSM6DSX_CHANNEL_ACC(IIO_ACCEL, 0x28, IIO_MOD_X, 0),
+ ST_LSM6DSX_CHANNEL_ACC(IIO_ACCEL, 0x2a, IIO_MOD_Y, 1),
+ ST_LSM6DSX_CHANNEL_ACC(IIO_ACCEL, 0x2c, IIO_MOD_Z, 2),
IIO_CHAN_SOFT_TIMESTAMP(3),
};
@@ -168,6 +168,9 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.wai = 0x69,
.int1_addr = 0x0d,
.int2_addr = 0x0e,
+ .int1_func_addr = 0x5e,
+ .int2_func_addr = 0x5f,
+ .int_func_mask = BIT(5),
.reset_addr = 0x12,
.max_fifo_size = 1365,
.id = {
@@ -279,11 +282,20 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.mask = GENMASK(5, 3),
},
},
+ .event_settings = {
+ .wakeup_reg = {
+ .addr = 0x5B,
+ .mask = GENMASK(5, 0),
+ },
+ },
},
{
.wai = 0x69,
.int1_addr = 0x0d,
.int2_addr = 0x0e,
+ .int1_func_addr = 0x5e,
+ .int2_func_addr = 0x5f,
+ .int_func_mask = BIT(5),
.reset_addr = 0x12,
.max_fifo_size = 682,
.id = {
@@ -395,11 +407,20 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.mask = GENMASK(5, 3),
},
},
+ .event_settings = {
+ .wakeup_reg = {
+ .addr = 0x5B,
+ .mask = GENMASK(5, 0),
+ },
+ },
},
{
.wai = 0x6a,
.int1_addr = 0x0d,
.int2_addr = 0x0e,
+ .int1_func_addr = 0x5e,
+ .int2_func_addr = 0x5f,
+ .int_func_mask = BIT(5),
.reset_addr = 0x12,
.max_fifo_size = 682,
.id = {
@@ -520,6 +541,16 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.mask = GENMASK(5, 3),
},
},
+ .event_settings = {
+ .enable_reg = {
+ .addr = 0x58,
+ .mask = BIT(7),
+ },
+ .wakeup_reg = {
+ .addr = 0x5B,
+ .mask = GENMASK(5, 0),
+ },
+ },
},
{
.wai = 0x6c,
@@ -666,6 +697,9 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.wai = 0x6b,
.int1_addr = 0x0d,
.int2_addr = 0x0e,
+ .int1_func_addr = 0x5e,
+ .int2_func_addr = 0x5f,
+ .int_func_mask = BIT(5),
.reset_addr = 0x12,
.max_fifo_size = 512,
.id = {
@@ -773,11 +807,24 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.mask = GENMASK(7, 6),
},
},
+ .event_settings = {
+ .enable_reg = {
+ .addr = 0x58,
+ .mask = BIT(7),
+ },
+ .wakeup_reg = {
+ .addr = 0x5B,
+ .mask = GENMASK(5, 0),
+ },
+ },
},
{
.wai = 0x6b,
.int1_addr = 0x0d,
.int2_addr = 0x0e,
+ .int1_func_addr = 0x5e,
+ .int2_func_addr = 0x5f,
+ .int_func_mask = BIT(5),
.reset_addr = 0x12,
.max_fifo_size = 512,
.id = {
@@ -913,6 +960,16 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.slv0_addr = 0x15,
.dw_slv0_addr = 0x21,
.batch_en = BIT(3),
+ },
+ .event_settings = {
+ .enable_reg = {
+ .addr = 0x58,
+ .mask = BIT(7),
+ },
+ .wakeup_reg = {
+ .addr = 0x5B,
+ .mask = GENMASK(5, 0),
+ },
}
},
};
@@ -1119,7 +1176,8 @@ static int st_lsm6dsx_read_oneshot(struct st_lsm6dsx_sensor *sensor,
if (err < 0)
return err;
- st_lsm6dsx_sensor_set_enable(sensor, false);
+ if (!hw->enable_event)
+ st_lsm6dsx_sensor_set_enable(sensor, false);
*val = (s16)le16_to_cpu(data);
@@ -1192,6 +1250,123 @@ static int st_lsm6dsx_write_raw(struct iio_dev *iio_dev,
return err;
}
+int st_lsm6dsx_event_setup(struct st_lsm6dsx_hw *hw, int state)
+{
+ int err;
+ u8 enable = 0;
+
+ if (!hw->settings->int1_func_addr)
+ return -ENOTSUPP;
+
+ enable = state ? hw->settings->event_settings.enable_reg.mask : 0;
+
+ err = regmap_update_bits(hw->regmap,
+ hw->settings->event_settings.enable_reg.addr,
+ hw->settings->event_settings.enable_reg.mask,
+ enable);
+ if (err < 0)
+ return err;
+
+ enable = state ? hw->irq_routing.mask : 0;
+
+ /* Enable wakeup interrupt */
+ return regmap_update_bits(hw->regmap, hw->irq_routing.addr,
+ hw->irq_routing.mask,
+ enable);
+}
+
+static int st_lsm6dsx_read_event(struct iio_dev *iio_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 st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (type != IIO_EV_TYPE_THRESH)
+ return -EINVAL;
+
+ *val2 = 0;
+ *val = hw->event_threshold;
+
+ return IIO_VAL_INT;
+}
+
+static int st_lsm6dsx_write_event(struct iio_dev *iio_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 st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ int err;
+
+ if (type != IIO_EV_TYPE_THRESH)
+ return -EINVAL;
+
+ if (val < 0 || val > 31)
+ return -EINVAL;
+
+ err = regmap_update_bits(hw->regmap,
+ hw->settings->event_settings.wakeup_reg.addr,
+ hw->settings->event_settings.wakeup_reg.mask,
+ val);
+ if (err)
+ return -EINVAL;
+
+ hw->event_threshold = val;
+
+ return 0;
+}
+
+static int st_lsm6dsx_read_event_config(struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (type != IIO_EV_TYPE_THRESH)
+ return -EINVAL;
+
+ return hw->enable_event;
+}
+
+static int st_lsm6dsx_write_event_config(struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ int err = 0;
+
+ if (type != IIO_EV_TYPE_THRESH)
+ return -EINVAL;
+
+ /* do not enable events if they are already enabled */
+ if (state && hw->enable_event)
+ return 0;
+
+ err = st_lsm6dsx_event_setup(hw, state);
+ if (err < 0)
+ return err;
+
+ err = st_lsm6dsx_sensor_set_enable(sensor, state);
+ if (err < 0)
+ return err;
+
+ hw->enable_event = state;
+
+ return 0;
+}
+
int st_lsm6dsx_set_watermark(struct iio_dev *iio_dev, unsigned int val)
{
struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
@@ -1276,6 +1451,10 @@ static const struct iio_info st_lsm6dsx_acc_info = {
.attrs = &st_lsm6dsx_acc_attribute_group,
.read_raw = st_lsm6dsx_read_raw,
.write_raw = st_lsm6dsx_write_raw,
+ .read_event_value = st_lsm6dsx_read_event,
+ .write_event_value = st_lsm6dsx_write_event,
+ .read_event_config = st_lsm6dsx_read_event_config,
+ .write_event_config = st_lsm6dsx_write_event_config,
.hwfifo_set_watermark = st_lsm6dsx_set_watermark,
};
@@ -1321,9 +1500,13 @@ static int st_lsm6dsx_get_drdy_reg(struct st_lsm6dsx_hw *hw, u8 *drdy_reg)
switch (drdy_pin) {
case 1:
*drdy_reg = hw->settings->int1_addr;
+ hw->irq_routing.addr = hw->settings->int1_func_addr;
+ hw->irq_routing.mask = hw->settings->int_func_mask;
break;
case 2:
*drdy_reg = hw->settings->int2_addr;
+ hw->irq_routing.addr = hw->settings->int2_func_addr;
+ hw->irq_routing.mask = hw->settings->int_func_mask;
break;
default:
dev_err(hw->dev, "unsupported data ready pin\n");
--
2.23.0
