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Date: Thu, 16 Nov 2023 19:15:28 +0530
From: Hiten Chauhan <hiten.chauhan@...iconsignals.io>
To: jmaneyrol@...ensense.com, jic23@...nel.org, lars@...afoo.de,
linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Hiten Chauhan <hiten.chauhan@...iconsignals.io>
Subject: [PATCH v2 1/1] Added tilt interrupt support in inv_icm42600
Description:
Add new device attribute to enable and disable
Tilt interrupt from kernel user space
Signed-off-by: Hiten Chauhan <hiten.chauhan@...iconsignals.io>
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600.h b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
index 0e290c807b0f..39ed39e77deb 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600.h
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
@@ -187,6 +187,8 @@ struct inv_icm42600_state {
#define INV_ICM42600_FIFO_CONFIG_STOP_ON_FULL \
FIELD_PREP(INV_ICM42600_FIFO_CONFIG_MASK, 2)
+#define INV_ICM42600_REG_MASK GENMASK(7, 0)
+
/* all sensor data are 16 bits (2 registers wide) in big-endian */
#define INV_ICM42600_REG_TEMP_DATA 0x001D
#define INV_ICM42600_REG_ACCEL_DATA_X 0x001F
@@ -239,6 +241,7 @@ struct inv_icm42600_state {
#define INV_ICM42600_REG_PWR_MGMT0 0x004E
#define INV_ICM42600_PWR_MGMT0_TEMP_DIS BIT(5)
#define INV_ICM42600_PWR_MGMT0_IDLE BIT(4)
+#define INV_ICM42600_PWR_ACCEL_MODE BIT(1)
#define INV_ICM42600_PWR_MGMT0_GYRO(_mode) \
FIELD_PREP(GENMASK(3, 2), (_mode))
#define INV_ICM42600_PWR_MGMT0_ACCEL(_mode) \
@@ -306,6 +309,21 @@ struct inv_icm42600_state {
#define INV_ICM42600_WHOAMI_ICM42622 0x46
#define INV_ICM42600_WHOAMI_ICM42631 0x5C
+/* Register configs for tilt interrupt */
+#define INV_ICM42605_REG_APEX_CONFIG4 0x4043
+#define INV_ICM42605_APEX_CONFIG4_MASK GENMASK(7, 0)
+
+#define INV_ICM42605_REG_APEX_CONFIG0 0x0056
+#define INV_ICM42605_APEX_CONFIG0_TILT_ENABLE BIT(4)
+#define INV_ICM42605_APEX_CONFIG0 BIT(1)
+
+#define INV_ICM42605_REG_INTF_CONFIG1 0x404D
+#define INV_ICM42605_INTF_CONFIG1_MASK GENMASK(5, 0)
+#define INV_ICM42605_INTF_CONFIG1_TILT_DET_INT1_EN BIT(3)
+
+#define INV_ICM42605_REG_INT_STATUS3 0x0038
+
+
/* User bank 1 (MSB 0x10) */
#define INV_ICM42600_REG_SENSOR_CONFIG0 0x1003
#define INV_ICM42600_SENSOR_CONFIG0_ZG_DISABLE BIT(5)
@@ -364,6 +382,8 @@ typedef int (*inv_icm42600_bus_setup)(struct inv_icm42600_state *);
extern const struct regmap_config inv_icm42600_regmap_config;
extern const struct dev_pm_ops inv_icm42600_pm_ops;
+extern uint8_t inv_icm42605_int_reg;
+
const struct iio_mount_matrix *
inv_icm42600_get_mount_matrix(const struct iio_dev *indio_dev,
const struct iio_chan_spec *chan);
@@ -395,4 +415,8 @@ struct iio_dev *inv_icm42600_accel_init(struct inv_icm42600_state *st);
int inv_icm42600_accel_parse_fifo(struct iio_dev *indio_dev);
+int inv_icm42605_generate_tilt_interrupt(struct inv_icm42600_state *st);
+
+int inv_icm42605_disable_tilt_interrupt(struct inv_icm42600_state *st);
+
#endif
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
index b1e4fde27d25..7140ac967d88 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
@@ -47,6 +47,8 @@
.ext_info = _ext_info, \
}
+uint8_t inv_icm42605_int_reg;
+
enum inv_icm42600_accel_scan {
INV_ICM42600_ACCEL_SCAN_X,
INV_ICM42600_ACCEL_SCAN_Y,
@@ -60,6 +62,69 @@ static const struct iio_chan_spec_ext_info inv_icm42600_accel_ext_infos[] = {
{},
};
+static ssize_t tilt_interrupt_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct inv_icm42600_state *st = dev_get_drvdata(dev);
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(st->map, inv_icm42605_int_reg, &val);
+
+ if (ret != 0)
+ return ret;
+
+ snprintf(buf, PAGE_SIZE, "Read reg %x value %x\n", inv_icm42605_int_reg, val);
+
+ return strlen(buf);
+}
+
+static ssize_t tilt_interrupt_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct inv_icm42600_state *st = dev_get_drvdata(dev);
+ int ret;
+ int value;
+
+ if (!st)
+ return -EINVAL;
+
+ if (kstrtoint(buf, 10, &value))
+ return -EINVAL;
+
+ inv_icm42605_int_reg = INV_ICM42605_REG_INT_STATUS3;
+
+ switch (value) {
+ case 1:
+ ret = inv_icm42605_generate_tilt_interrupt(st);
+ if (ret != 0)
+ return -EIO;
+ break;
+ case 0:
+ ret = inv_icm42605_disable_tilt_interrupt(st);
+ if (ret != 0)
+ return -EIO;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR_RW(tilt_interrupt, 0644,
+ tilt_interrupt_show, tilt_interrupt_store);
+
+static struct attribute *icm42605_attrs[] = {
+ &dev_attr_tilt_interrupt.attr,
+ NULL,
+};
+
+static const struct attribute_group icm42605_attrs_group = {
+ .attrs = icm42605_attrs,
+};
+
static const struct iio_chan_spec inv_icm42600_accel_channels[] = {
INV_ICM42600_ACCEL_CHAN(IIO_MOD_X, INV_ICM42600_ACCEL_SCAN_X,
inv_icm42600_accel_ext_infos),
@@ -702,6 +767,7 @@ static const struct iio_info inv_icm42600_accel_info = {
.update_scan_mode = inv_icm42600_accel_update_scan_mode,
.hwfifo_set_watermark = inv_icm42600_accel_hwfifo_set_watermark,
.hwfifo_flush_to_buffer = inv_icm42600_accel_hwfifo_flush,
+ .attrs = &icm42605_attrs_group,
};
struct iio_dev *inv_icm42600_accel_init(struct inv_icm42600_state *st)
@@ -791,3 +857,67 @@ int inv_icm42600_accel_parse_fifo(struct iio_dev *indio_dev)
return 0;
}
+
+int inv_icm42605_generate_tilt_interrupt(struct inv_icm42600_state *st)
+{
+ int ret;
+ int val;
+ char sleep = 10;
+
+ ret = regmap_update_bits(st->map, INV_ICM42605_REG_APEX_CONFIG4,
+ INV_ICM42605_APEX_CONFIG4_MASK, 0);
+ if (ret)
+ return ret;
+
+ val = INV_ICM42600_PWR_ACCEL_MODE;
+ ret = regmap_write(st->map, INV_ICM42600_REG_PWR_MGMT0, val);
+ if (ret)
+ return ret;
+
+ val = INV_ICM42605_APEX_CONFIG0;
+ ret = regmap_write(st->map, INV_ICM42605_REG_APEX_CONFIG0, val);
+ if (ret)
+ return ret;
+
+ val = INV_ICM42600_SIGNAL_PATH_RESET_DMP_MEM_RESET;
+ ret = regmap_write(st->map, INV_ICM42600_REG_SIGNAL_PATH_RESET, val);
+ if (ret)
+ return ret;
+
+ msleep(sleep);
+
+ val = INV_ICM42600_SIGNAL_PATH_RESET_DMP_INIT_EN;
+ ret = regmap_write(st->map, INV_ICM42600_REG_SIGNAL_PATH_RESET, val);
+ if (ret)
+ return ret;
+
+ val = INV_ICM42605_APEX_CONFIG0_TILT_ENABLE |
+ INV_ICM42605_APEX_CONFIG0;
+ ret = regmap_write(st->map, INV_ICM42605_REG_APEX_CONFIG0, val);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->map, INV_ICM42605_REG_INTF_CONFIG1,
+ INV_ICM42605_INTF_CONFIG1_MASK,
+ INV_ICM42605_INTF_CONFIG1_TILT_DET_INT1_EN);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+int inv_icm42605_disable_tilt_interrupt(struct inv_icm42600_state *st)
+{
+ int ret;
+
+ ret = regmap_write(st->map, INV_ICM42605_REG_APEX_CONFIG0, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->map, INV_ICM42605_REG_INTF_CONFIG1,
+ INV_ICM42605_INTF_CONFIG1_MASK, 0);
+ if (ret)
+ return ret;
+
+ return 0;
+}
--
2.25.1
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