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authorGregor Boirie <gregor.boirie@parrot.com>2016-04-20 19:23:45 +0200
committerJonathan Cameron <jic23@kernel.org>2016-04-23 22:16:01 +0100
commiteb3798463f71afc77abd25b2f62708be06f7173b (patch)
treed35a30863782850b30e888b9cbc5822386beee1f /drivers/iio
parent97eacb9166f4810368e180073dcbceeff0de34df (diff)
downloadlinux-eb3798463f71afc77abd25b2f62708be06f7173b.tar.bz2
iio:imu:mpu6050: enhance mounting matrix support
Add a new rotation matrix sysfs attribute compliant with IIO core mounting matrix API. Matrix is retrieved from "in_anglvel_mount_matrix" and "in_accel_mount_matrix" sysfs attributes. It is declared into mpu6050 DTS entry as a "mount-matrix" property. Old interface is kept for backward userspace compatibility and may be retrieved from legacy platform_data mechanism only. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/imu/inv_mpu6050/inv_mpu_core.c36
-rw-r--r--drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h4
2 files changed, 36 insertions, 4 deletions
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index d192953e9a38..482a2490c53a 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -600,6 +600,10 @@ inv_fifo_rate_show(struct device *dev, struct device_attribute *attr,
/**
* inv_attr_show() - calling this function will show current
* parameters.
+ *
+ * Deprecated in favor of IIO mounting matrix API.
+ *
+ * See inv_get_mount_matrix()
*/
static ssize_t inv_attr_show(struct device *dev, struct device_attribute *attr,
char *buf)
@@ -644,6 +648,18 @@ static int inv_mpu6050_validate_trigger(struct iio_dev *indio_dev,
return 0;
}
+static const struct iio_mount_matrix *
+inv_get_mount_matrix(const struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ return &((struct inv_mpu6050_state *)iio_priv(indio_dev))->orientation;
+}
+
+static const struct iio_chan_spec_ext_info inv_ext_info[] = {
+ IIO_MOUNT_MATRIX(IIO_SHARED_BY_TYPE, inv_get_mount_matrix),
+ { },
+};
+
#define INV_MPU6050_CHAN(_type, _channel2, _index) \
{ \
.type = _type, \
@@ -660,6 +676,7 @@ static int inv_mpu6050_validate_trigger(struct iio_dev *indio_dev,
.shift = 0, \
.endianness = IIO_BE, \
}, \
+ .ext_info = inv_ext_info, \
}
static const struct iio_chan_spec inv_mpu_channels[] = {
@@ -692,14 +709,16 @@ static IIO_CONST_ATTR(in_accel_scale_available,
"0.000598 0.001196 0.002392 0.004785");
static IIO_DEV_ATTR_SAMP_FREQ(S_IRUGO | S_IWUSR, inv_fifo_rate_show,
inv_mpu6050_fifo_rate_store);
+
+/* Deprecated: kept for userspace backward compatibility. */
static IIO_DEVICE_ATTR(in_gyro_matrix, S_IRUGO, inv_attr_show, NULL,
ATTR_GYRO_MATRIX);
static IIO_DEVICE_ATTR(in_accel_matrix, S_IRUGO, inv_attr_show, NULL,
ATTR_ACCL_MATRIX);
static struct attribute *inv_attributes[] = {
- &iio_dev_attr_in_gyro_matrix.dev_attr.attr,
- &iio_dev_attr_in_accel_matrix.dev_attr.attr,
+ &iio_dev_attr_in_gyro_matrix.dev_attr.attr, /* deprecated */
+ &iio_dev_attr_in_accel_matrix.dev_attr.attr, /* deprecated */
&iio_dev_attr_sampling_frequency.dev_attr.attr,
&iio_const_attr_sampling_frequency_available.dev_attr.attr,
&iio_const_attr_in_accel_scale_available.dev_attr.attr,
@@ -779,9 +798,20 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
st->powerup_count = 0;
st->irq = irq;
st->map = regmap;
+
pdata = dev_get_platdata(dev);
- if (pdata)
+ if (!pdata) {
+ result = of_iio_read_mount_matrix(dev, "mount-matrix",
+ &st->orientation);
+ if (result) {
+ dev_err(dev, "Failed to retrieve mounting matrix %d\n",
+ result);
+ return result;
+ }
+ } else {
st->plat_data = *pdata;
+ }
+
/* power is turned on inside check chip type*/
result = inv_check_and_setup_chip(st);
if (result)
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
index e302a49703bf..52d60cdc9f16 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
@@ -114,7 +114,8 @@ struct inv_mpu6050_hw {
* @hw: Other hardware-specific information.
* @chip_type: chip type.
* @time_stamp_lock: spin lock to time stamp.
- * @plat_data: platform data.
+ * @plat_data: platform data (deprecated in favor of @orientation).
+ * @orientation: sensor chip orientation relative to main hardware.
* @timestamps: kfifo queue to store time stamp.
* @map regmap pointer.
* @irq interrupt number.
@@ -131,6 +132,7 @@ struct inv_mpu6050_state {
struct i2c_client *mux_client;
unsigned int powerup_count;
struct inv_mpu6050_platform_data plat_data;
+ struct iio_mount_matrix orientation;
DECLARE_KFIFO(timestamps, long long, TIMESTAMP_FIFO_SIZE);
struct regmap *map;
int irq;