This patch adds generic gyroscope driver for STMicroelectronics
gyroscopes, currently it supports:
L3G4200D, LSM330DL, L3GD20, L3GD20H, LSM330DLC, L3G4IS, LSM330.
Signed-off-by: Denis Ciocca <denis.ciocca@xxxxxx>
---
drivers/iio/gyro/Kconfig | 40 +++
drivers/iio/gyro/Makefile | 6 +
drivers/iio/gyro/st_gyro_buffer.c | 119 +++++++++
drivers/iio/gyro/st_gyro_core.c | 513 +++++++++++++++++++++++++++++++++++++
drivers/iio/gyro/st_gyro_i2c.c | 84 ++++++
drivers/iio/gyro/st_gyro_spi.c | 83 ++++++
include/linux/iio/gyro/st_gyro.h | 45 ++++
7 files changed, 890 insertions(+), 0 deletions(-)
create mode 100644 drivers/iio/gyro/st_gyro_buffer.c
create mode 100644 drivers/iio/gyro/st_gyro_core.c
create mode 100644 drivers/iio/gyro/st_gyro_i2c.c
create mode 100644 drivers/iio/gyro/st_gyro_spi.c
create mode 100644 include/linux/iio/gyro/st_gyro.h
diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
index 96b68f6..7a7eef5 100644
--- a/drivers/iio/gyro/Kconfig
+++ b/drivers/iio/gyro/Kconfig
@@ -23,4 +23,44 @@ config HID_SENSOR_GYRO_3D
Say yes here to build support for the HID SENSOR
Gyroscope 3D.
+config IIO_ST_GYRO_3AXIS
+ tristate "STMicroelectronics gyroscopes 3-Axis Driver"
+ depends on (I2C || SPI_MASTER) && SYSFS
+ select IIO_ST_SENSORS_CORE
+ help
+ Say yes here to build support for STMicroelectronics gyroscopes:
+ L3G4200D, LSM330DL, L3GD20, L3GD20H, LSM330DLC, L3G4IS, LSM330.
+
+ This driver can also be built as a module. If so, the module
+ will be called st_gyro.
+
+config IIO_ST_GYRO_3AXIS_I2C
+ tristate "support I2C bus connection"
+ depends on IIO_ST_GYRO_3AXIS && I2C
+ select IIO_ST_SENSORS_I2C
+ help
+ Say yes here to build I2C support for STMicroelectronics gyroscopes.
+
+ To compile this driver as a module, choose M here: the
+ module will be called st_gyro_i2c.
+
+config IIO_ST_GYRO_3AXIS_SPI
+ tristate "support SPI bus connection"
+ depends on IIO_ST_GYRO_3AXIS && SPI_MASTER
+ select IIO_ST_SENSORS_SPI
+ help
+ Say yes here to build SPI support for STMicroelectronics gyroscopes.
+
+ To compile this driver as a module, choose M here: the
+ module will be called st_gyro_spi.
+
+config IIO_ST_GYRO_3AXIS_TRIGGERED_BUFFER
+ tristate "support triggered buffer"
+ depends on IIO_ST_GYRO_3AXIS
+ select IIO_TRIGGERED_BUFFER
+ select IIO_BUFFER
+ select IIO_ST_SENSORS_TRIGGERED_BUFFER
+ help
+ Default trigger and buffer for STMicroelectronics gyroscopes driver.
+
endmenu
diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile
index 702a058..61d43ba 100644
--- a/drivers/iio/gyro/Makefile
+++ b/drivers/iio/gyro/Makefile
@@ -4,3 +4,9 @@
obj-$(CONFIG_ADIS16136) += adis16136.o
obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
+
+st_gyro-y := st_gyro_core.o
+obj-$(CONFIG_IIO_ST_GYRO_3AXIS_I2C) += st_gyro_i2c.o
+obj-$(CONFIG_IIO_ST_GYRO_3AXIS_SPI) += st_gyro_spi.o
+obj-$(CONFIG_IIO_ST_GYRO_3AXIS_TRIGGERED_BUFFER) += st_gyro_buffer.o
+obj-$(CONFIG_IIO_ST_GYRO_3AXIS) += st_gyro.o
diff --git a/drivers/iio/gyro/st_gyro_buffer.c b/drivers/iio/gyro/st_gyro_buffer.c
new file mode 100644
index 0000000..1293ca5
--- /dev/null
+++ b/drivers/iio/gyro/st_gyro_buffer.c
@@ -0,0 +1,119 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@xxxxxx>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/interrupt.h>
+#include <linux/byteorder/generic.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#include <linux/iio/gyro/st_gyro.h>
+#include <linux/iio/common/st_sensors.h>
+
+
+int st_gyro_trig_set_state(struct iio_trigger *trig, bool state)
+{
+ struct iio_dev *indio_dev = trig->private_data;
+ return st_gyro_set_dataready_irq(indio_dev, state);
+}
+EXPORT_SYMBOL(st_gyro_trig_set_state);
+
+static int st_gyro_buffer_preenable(struct iio_dev *indio_dev)
+{
+ int err;
+
+ err = st_gyro_set_enable(indio_dev, true);
+ if (err < 0)
+ goto st_gyro_set_enable_error;
+
+ err = iio_sw_buffer_preenable(indio_dev);
+
+st_gyro_set_enable_error:
+ return err;
+}
+
+static int st_gyro_buffer_postenable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ gdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
+ if (gdata->buffer_data == NULL) {
+ err = -ENOMEM;
+ goto allocate_memory_error;
+ }
+
+ err = st_gyro_set_axis_enable(indio_dev,
+ (u8)indio_dev->active_scan_mask[0]);
+ if (err < 0)
+ goto st_gyro_buffer_postenable_error;
+
+ err = iio_triggered_buffer_postenable(indio_dev);
+ if (err < 0)
+ goto st_gyro_buffer_postenable_error;
+
+ return err;
+
+st_gyro_buffer_postenable_error:
+ kfree(gdata->buffer_data);
+allocate_memory_error:
+ return err;
+}
+
+static int st_gyro_buffer_predisable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ err = iio_triggered_buffer_predisable(indio_dev);
+ if (err < 0)
+ goto st_gyro_buffer_predisable_error;
+
+ err = st_gyro_set_axis_enable(indio_dev,
+ ST_SENSORS_ENABLE_ALL_CHANNELS);
+ if (err < 0)
+ goto st_gyro_buffer_predisable_error;
+
+ err = st_gyro_set_enable(indio_dev, false);
+
+st_gyro_buffer_predisable_error:
+ kfree(gdata->buffer_data);
+ return err;
+}
+
+static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {
+ .preenable = &st_gyro_buffer_preenable,
+ .postenable = &st_gyro_buffer_postenable,
+ .predisable = &st_gyro_buffer_predisable,
+};
+
+int st_gyro_allocate_ring(struct iio_dev *indio_dev)
+{
+ return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ &st_sensors_trigger_handler, &st_gyro_buffer_setup_ops);
+}
+EXPORT_SYMBOL(st_gyro_allocate_ring);
+
+void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
+{
+ iio_triggered_buffer_cleanup(indio_dev);
+}
+EXPORT_SYMBOL(st_gyro_deallocate_ring);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>");
+MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c
new file mode 100644
index 0000000..d4b6c82
--- /dev/null
+++ b/drivers/iio/gyro/st_gyro_core.c
@@ -0,0 +1,513 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@xxxxxx>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+
+#include <linux/iio/gyro/st_gyro.h>
+#include <linux/iio/common/st_sensors.h>
+
+
+/* DEFAULT VALUE FOR SENSORS */
+#define ST_GYRO_DEFAULT_OUT_X_L_ADDR 0x28
+#define ST_GYRO_DEFAULT_OUT_Y_L_ADDR 0x2a
+#define ST_GYRO_DEFAULT_OUT_Z_L_ADDR 0x2c
+
+/* FULLSCALE */
+#define ST_GYRO_FS_AVL_250DPS 250
+#define ST_GYRO_FS_AVL_500DPS 500
+#define ST_GYRO_FS_AVL_2000DPS 2000
+
+/* CUSTOM VALUES FOR SENSOR 1 */
+#define ST_GYRO_1_WAI_EXP 0xd3
+#define ST_GYRO_1_ODR_ADDR 0x20
+#define ST_GYRO_1_ODR_MASK 0xc0
+#define ST_GYRO_1_ODR_N_BIT 2
+#define ST_GYRO_1_ODR_AVL_100HZ_VAL 0x00
+#define ST_GYRO_1_ODR_AVL_200HZ_VAL 0x01
+#define ST_GYRO_1_ODR_AVL_400HZ_VAL 0x02
+#define ST_GYRO_1_ODR_AVL_800HZ_VAL 0x03
+#define ST_GYRO_1_PW_ADDR 0x20
+#define ST_GYRO_1_PW_MASK 0x08
+#define ST_GYRO_1_PW_N_BIT 1
+#define ST_GYRO_1_FS_N_BIT 2
+#define ST_GYRO_1_FS_ADDR 0x23
+#define ST_GYRO_1_FS_MASK 0x30
+#define ST_GYRO_1_FS_AVL_250_VAL 0x00
+#define ST_GYRO_1_FS_AVL_500_VAL 0x01
+#define ST_GYRO_1_FS_AVL_2000_VAL 0x02
+#define ST_GYRO_1_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750)
+#define ST_GYRO_1_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500)
+#define ST_GYRO_1_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000)
+#define ST_GYRO_1_BDU_ADDR 0x23
+#define ST_GYRO_1_BDU_MASK 0x80
+#define ST_GYRO_1_DRDY_IRQ_ADDR 0x22
+#define ST_GYRO_1_DRDY_IRQ_MASK 0x08
+#define ST_GYRO_1_MULTIREAD_BIT true
+
+/* CUSTOM VALUES FOR SENSOR 2 */
+#define ST_GYRO_2_WAI_EXP 0xd4
+#define ST_GYRO_2_ODR_ADDR 0x20
+#define ST_GYRO_2_ODR_MASK 0xc0
+#define ST_GYRO_2_ODR_N_BIT 2
+#define ST_GYRO_2_ODR_AVL_95HZ_VAL 0x00
+#define ST_GYRO_2_ODR_AVL_190HZ_VAL 0x01
+#define ST_GYRO_2_ODR_AVL_380HZ_VAL 0x02
+#define ST_GYRO_2_ODR_AVL_760HZ_VAL 0x03
+#define ST_GYRO_2_PW_ADDR 0x20
+#define ST_GYRO_2_PW_MASK 0x08
+#define ST_GYRO_2_PW_N_BIT 1
+#define ST_GYRO_2_FS_N_BIT 2
+#define ST_GYRO_2_FS_ADDR 0x23
+#define ST_GYRO_2_FS_MASK 0x30
+#define ST_GYRO_2_FS_AVL_250_VAL 0x00
+#define ST_GYRO_2_FS_AVL_500_VAL 0x01
+#define ST_GYRO_2_FS_AVL_2000_VAL 0x02
+#define ST_GYRO_2_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750)
+#define ST_GYRO_2_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500)
+#define ST_GYRO_2_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000)
+#define ST_GYRO_2_BDU_ADDR 0x23
+#define ST_GYRO_2_BDU_MASK 0x80
+#define ST_GYRO_2_DRDY_IRQ_ADDR 0x22
+#define ST_GYRO_2_DRDY_IRQ_MASK 0x08
+#define ST_GYRO_2_MULTIREAD_BIT true
+
+static const struct iio_chan_spec st_gyro_16bit_channels[] = {
+ ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL, ST_SENSORS_SCAN_X,
+ IIO_MOD_X, IIO_LE, ST_SENSORS_DEFAULT_16_REALBITS,
+ ST_GYRO_DEFAULT_OUT_X_L_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL, ST_SENSORS_SCAN_Y,
+ IIO_MOD_Y, IIO_LE, ST_SENSORS_DEFAULT_16_REALBITS,
+ ST_GYRO_DEFAULT_OUT_Y_L_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL, ST_SENSORS_SCAN_Z,
+ IIO_MOD_Z, IIO_LE, ST_SENSORS_DEFAULT_16_REALBITS,
+ ST_GYRO_DEFAULT_OUT_Z_L_ADDR),
+ IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
+static const struct st_sensors st_gyro_sensors[] = {
+ {
+ .wai = ST_GYRO_1_WAI_EXP,
+ .sensors_supported = {
+ [0] = L3G4200D_GYRO_DEV_NAME,
+ [1] = LSM330DL_GYRO_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
+ .odr = {
+ .addr = ST_GYRO_1_ODR_ADDR,
+ .mask = ST_GYRO_1_ODR_MASK,
+ .num_bit = ST_GYRO_1_ODR_N_BIT,
+ .odr_avl = {
+ { 100, ST_GYRO_1_ODR_AVL_100HZ_VAL, },
+ { 200, ST_GYRO_1_ODR_AVL_200HZ_VAL, },
+ { 400, ST_GYRO_1_ODR_AVL_400HZ_VAL, },
+ { 800, ST_GYRO_1_ODR_AVL_800HZ_VAL, },
+ },
+ },
+ .pw = {
+ .addr = ST_GYRO_1_PW_ADDR,
+ .mask = ST_GYRO_1_PW_MASK,
+ .num_bit = ST_GYRO_1_PW_N_BIT,
+ .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .enable_axis = {
+ .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+ .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+ },
+ .fs = {
+ .addr = ST_GYRO_1_FS_ADDR,
+ .mask = ST_GYRO_1_FS_MASK,
+ .num_bit = ST_GYRO_1_FS_N_BIT,
+ .fs_avl = {
+ [0] = {
+ .num = ST_GYRO_FS_AVL_250DPS,
+ .value = ST_GYRO_1_FS_AVL_250_VAL,
+ .gain = ST_GYRO_1_FS_AVL_250_GAIN,
+ },
+ [1] = {
+ .num = ST_GYRO_FS_AVL_500DPS,
+ .value = ST_GYRO_1_FS_AVL_500_VAL,
+ .gain = ST_GYRO_1_FS_AVL_500_GAIN,
+ },
+ [2] = {
+ .num = ST_GYRO_FS_AVL_2000DPS,
+ .value = ST_GYRO_1_FS_AVL_2000_VAL,
+ .gain = ST_GYRO_1_FS_AVL_2000_GAIN,
+ },
+ },
+ },
+ .bdu = {
+ .addr = ST_GYRO_1_BDU_ADDR,
+ .mask = ST_GYRO_1_BDU_MASK,
+ },
+ .drdy_irq = {
+ .addr = ST_GYRO_1_DRDY_IRQ_ADDR,
+ .mask = ST_GYRO_1_DRDY_IRQ_MASK,
+ },
+ .multi_read_bit = ST_GYRO_1_MULTIREAD_BIT,
+ .bootime = 2,
+ },
+ {
+ .wai = ST_GYRO_2_WAI_EXP,
+ .sensors_supported = {
+ [0] = L3GD20_GYRO_DEV_NAME,
+ [1] = L3GD20H_GYRO_DEV_NAME,
+ [2] = LSM330DLC_GYRO_DEV_NAME,
+ [3] = L3G4IS_GYRO_DEV_NAME,
+ [4] = LSM330_GYRO_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
+ .odr = {
+ .addr = ST_GYRO_2_ODR_ADDR,
+ .mask = ST_GYRO_2_ODR_MASK,
+ .num_bit = ST_GYRO_2_ODR_N_BIT,
+ .odr_avl = {
+ { 95, ST_GYRO_2_ODR_AVL_95HZ_VAL, },
+ { 190, ST_GYRO_2_ODR_AVL_190HZ_VAL, },
+ { 380, ST_GYRO_2_ODR_AVL_380HZ_VAL, },
+ { 760, ST_GYRO_2_ODR_AVL_760HZ_VAL, },
+ },
+ },
+ .pw = {
+ .addr = ST_GYRO_2_PW_ADDR,
+ .mask = ST_GYRO_2_PW_MASK,
+ .num_bit = ST_GYRO_2_PW_N_BIT,
+ .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .enable_axis = {
+ .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+ .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+ },
+ .fs = {
+ .addr = ST_GYRO_2_FS_ADDR,
+ .mask = ST_GYRO_2_FS_MASK,
+ .num_bit = ST_GYRO_2_FS_N_BIT,
+ .fs_avl = {
+ [0] = {
+ .num = ST_GYRO_FS_AVL_250DPS,
+ .value = ST_GYRO_2_FS_AVL_250_VAL,
+ .gain = ST_GYRO_2_FS_AVL_250_GAIN,
+ },
+ [1] = {
+ .num = ST_GYRO_FS_AVL_500DPS,
+ .value = ST_GYRO_2_FS_AVL_500_VAL,
+ .gain = ST_GYRO_2_FS_AVL_500_GAIN,
+ },
+ [2] = {
+ .num = ST_GYRO_FS_AVL_2000DPS,
+ .value = ST_GYRO_2_FS_AVL_2000_VAL,
+ .gain = ST_GYRO_2_FS_AVL_2000_GAIN,
+ },
+ },
+ },
+ .bdu = {
+ .addr = ST_GYRO_2_BDU_ADDR,
+ .mask = ST_GYRO_2_BDU_MASK,
+ },
+ .drdy_irq = {
+ .addr = ST_GYRO_2_DRDY_IRQ_ADDR,
+ .mask = ST_GYRO_2_DRDY_IRQ_MASK,
+ },
+ .multi_read_bit = ST_GYRO_2_MULTIREAD_BIT,
+ .bootime = 2,
+ },
+};
+
+static int st_gyro_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *ch, int *val,
+ int *val2, long mask)
+{
+ int err;
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(&indio_dev->mlock);
+ if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
+ err = -EBUSY;
+ goto read_error;
+ } else {
+ err = st_sensors_set_enable(indio_dev,
+ &st_gyro_sensors[gdata->index], true);
+ if (err < 0)
+ goto read_error;
+
+ msleep((st_gyro_sensors[gdata->index].bootime * 1000)
+ / gdata->odr);
+ err = st_sensors_read_axis_data(indio_dev,
+ ch->address, val);
+ if (err < 0)
+ goto read_error;
+
+ *val = *val >> ch->scan_type.shift;
+ }
+ mutex_unlock(&indio_dev->mlock);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = gdata->current_fullscale->gain;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+
+read_error:
+ mutex_unlock(&indio_dev->mlock);
+ return err;
+}
+
+static int st_gyro_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+ int err;
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ err = st_sensors_set_fullscale_by_gain(indio_dev,
+ &st_gyro_sensors[gdata->index], val2);
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+int st_gyro_set_dataready_irq(struct iio_dev *indio_dev, bool state)
+{
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ return st_sensors_set_dataready_irq(indio_dev,
+ &st_gyro_sensors[gdata->index], state);
+}
+EXPORT_SYMBOL(st_gyro_set_dataready_irq);
+
+int st_gyro_set_axis_enable(struct iio_dev *indio_dev, u8 active_bit)
+{
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ return st_sensors_set_axis_enable(indio_dev,
+ &st_gyro_sensors[gdata->index], active_bit);
+}
+EXPORT_SYMBOL(st_gyro_set_axis_enable);
+
+static int st_gyro_check_device_support(struct iio_dev *indio_dev)
+{
+ int i, n, err;
+ u8 wai;
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ err = gdata->tf->read_byte(&gdata->tb, gdata->dev,
+ ST_SENSORS_DEFAULT_WAI_ADDRESS, &wai);
+ if (err < 0) {
+ dev_err(&indio_dev->dev, "failed to read Who-Am-I register.\n");
+ goto read_wai_error;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(st_gyro_sensors); i++) {
+ if (st_gyro_sensors[i].wai == wai)
+ break;
+ }
+ if (i == ARRAY_SIZE(st_gyro_sensors))
+ goto device_not_supported;
+
+ for (n = 0; n < ARRAY_SIZE(st_gyro_sensors[i].sensors_supported);
+ n++) {
+ if (strcmp(indio_dev->name,
+ &st_gyro_sensors[i].sensors_supported[n][0]) == 0)
+ break;
+ }
+ if (n == ARRAY_SIZE(st_gyro_sensors[i].sensors_supported)) {
+ dev_err(&indio_dev->dev, "device name and WhoAmI mismatch.\n");
+ goto sensor_name_mismatch;
+ }
+
+ gdata->index = i;
+
+ return i;
+
+device_not_supported:
+ dev_err(&indio_dev->dev, "device not supported: WhoAmI (0x%x).\n", wai);
+sensor_name_mismatch:
+ err = -ENODEV;
+read_wai_error:
+ return err;
+}
+
+int st_gyro_set_enable(struct iio_dev *indio_dev, bool enable)
+{
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ return st_sensors_set_enable(indio_dev,
+ &st_gyro_sensors[gdata->index], enable);
+}
+EXPORT_SYMBOL(st_gyro_set_enable);
+
+static ssize_t st_gyro_sysfs_set_sampling_frequency(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ int err;
+ unsigned int odr;
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ err = kstrtoint(buf, 10, &odr);
+ if (err < 0)
+ goto conversion_error;
+
+ mutex_lock(&indio_dev->mlock);
+ err = st_sensors_set_odr(indio_dev,
+ &st_gyro_sensors[gdata->index], odr);
+ mutex_unlock(&indio_dev->mlock);
+
+conversion_error:
+ return err < 0 ? err : size;
+}
+
+static ssize_t st_gyro_sysfs_get_sampling_frequency(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ return sprintf(buf, "%d\n", gdata->odr);
+}
+
+static ssize_t st_gyro_sysfs_scale_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ return st_sensors_get_scale_avl(indio_dev,
+ st_gyro_sensors[gdata->index].fs.fs_avl, buf);
+}
+
+static ssize_t st_gyro_sysfs_sampling_frequency_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ return st_sensors_get_sampling_frequency_avl(indio_dev,
+ st_gyro_sensors[gdata->index].odr.odr_avl, buf);
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(st_gyro_sysfs_sampling_frequency_avail);
+
+static IIO_DEVICE_ATTR(in_anglvel_scale_available, S_IRUGO,
+ st_gyro_sysfs_scale_avail, NULL , 0);
+
+static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
+ st_gyro_sysfs_get_sampling_frequency,
+ st_gyro_sysfs_set_sampling_frequency);
+
+static struct attribute *st_gyro_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_in_anglvel_scale_available.dev_attr.attr,
+ &iio_dev_attr_sampling_frequency.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_gyro_attribute_group = {
+ .attrs = st_gyro_attributes,
+};
+
+static const struct iio_info gyro_info = {
+ .driver_module = THIS_MODULE,
+ .attrs = &st_gyro_attribute_group,
+ .read_raw = &st_gyro_read_raw,
+ .write_raw = &st_gyro_write_raw,
+};
+
+int st_gyro_common_probe(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &gyro_info;
+
+ err = st_gyro_check_device_support(indio_dev);
+ if (err < 0)
+ goto st_gyro_common_probe_error;
+
+ gdata->multiread_bit = st_gyro_sensors[gdata->index].multi_read_bit;
+ indio_dev->channels = st_gyro_sensors[gdata->index].ch;
+ indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
+
+ gdata->current_fullscale = (struct st_sensor_fullscale_avl *)
+ &st_gyro_sensors[gdata->index].fs.fs_avl[0];
+ gdata->odr = st_gyro_sensors[gdata->index].odr.odr_avl[0].hz;
+
+ err = st_sensors_init_sensor(indio_dev, &st_gyro_sensors[gdata->index]);
+ if (err < 0)
+ goto st_gyro_common_probe_error;
+
+ if (gdata->get_irq_data_ready(indio_dev) > 0) {
+ err = st_gyro_allocate_ring(indio_dev);
+ if (err < 0)
+ goto st_gyro_common_probe_error;
+
+ err = st_sensors_allocate_trigger(indio_dev,
+ &st_gyro_trig_set_state, NULL);
+ if (err < 0)
+ goto st_gyro_probe_trigger_error;
+ }
+
+ err = iio_device_register(indio_dev);
+ if (err)
+ goto st_gyro_device_register_error;
+
+ return err;
+
+st_gyro_device_register_error:
+ if (gdata->get_irq_data_ready(indio_dev) > 0)
+ st_sensors_deallocate_trigger(indio_dev);
+st_gyro_probe_trigger_error:
+ if (gdata->get_irq_data_ready(indio_dev) > 0)
+ st_gyro_deallocate_ring(indio_dev);
+st_gyro_common_probe_error:
+ return err;
+}
+EXPORT_SYMBOL(st_gyro_common_probe);
+
+void st_gyro_common_remove(struct iio_dev *indio_dev)
+{
+ struct st_sensor_data *gdata = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ if (gdata->get_irq_data_ready(indio_dev) > 0) {
+ st_sensors_deallocate_trigger(indio_dev);
+ st_gyro_deallocate_ring(indio_dev);
+ }
+ iio_device_free(indio_dev);
+}
+EXPORT_SYMBOL(st_gyro_common_remove);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>");
+MODULE_DESCRIPTION("STMicroelectronics gyroscopes driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/gyro/st_gyro_i2c.c b/drivers/iio/gyro/st_gyro_i2c.c
new file mode 100644
index 0000000..24cead1
--- /dev/null
+++ b/drivers/iio/gyro/st_gyro_i2c.c
@@ -0,0 +1,84 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@xxxxxx>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger.h>
+
+#include <linux/iio/gyro/st_gyro.h>
+#include <linux/iio/common/st_sensors.h>
+
+
+static int st_gyro_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct iio_dev *indio_dev;
+ struct st_sensor_data *gdata;
+ int err;
+
+ indio_dev = iio_device_alloc(sizeof(*gdata));
+ if (indio_dev == NULL) {
+ err = -ENOMEM;
+ goto iio_device_alloc_error;
+ }
+
+ gdata = iio_priv(indio_dev);
+ gdata->dev = &client->dev;
+
+ st_sensors_i2c_configure(indio_dev, client, gdata);
+
+ err = st_gyro_common_probe(indio_dev);
+ if (err < 0)
+ goto st_gyro_common_probe_error;
+
+ return 0;
+
+st_gyro_common_probe_error:
+ iio_device_free(indio_dev);
+iio_device_alloc_error:
+ return err;
+}
+
+static int st_gyro_i2c_remove(struct i2c_client *client)
+{
+ st_gyro_common_remove(i2c_get_clientdata(client));
+
+ return 0;
+}
+
+static const struct i2c_device_id st_gyro_id_table[] = {
+ { L3G4200D_GYRO_DEV_NAME },
+ { LSM330DL_GYRO_DEV_NAME },
+ { L3GD20_GYRO_DEV_NAME },
+ { L3GD20H_GYRO_DEV_NAME },
+ { LSM330DLC_GYRO_DEV_NAME },
+ { L3G4IS_GYRO_DEV_NAME },
+ { LSM330_GYRO_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, st_gyro_id_table);
+
+static struct i2c_driver st_gyro_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "st-gyro-i2c",
+ },
+ .probe = st_gyro_i2c_probe,
+ .remove = st_gyro_i2c_remove,
+ .id_table = st_gyro_id_table,
+};
+module_i2c_driver(st_gyro_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>");
+MODULE_DESCRIPTION("STMicroelectronics gyroscopes i2c driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/gyro/st_gyro_spi.c b/drivers/iio/gyro/st_gyro_spi.c
new file mode 100644
index 0000000..38775e3
--- /dev/null
+++ b/drivers/iio/gyro/st_gyro_spi.c
@@ -0,0 +1,83 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@xxxxxx>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger.h>
+
+#include <linux/iio/gyro/st_gyro.h>
+#include <linux/iio/common/st_sensors.h>
+
+
+static int st_gyro_spi_probe(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev;
+ struct st_sensor_data *gdata;
+ int err;
+
+ indio_dev = iio_device_alloc(sizeof(*gdata));
+ if (indio_dev == NULL) {
+ err = -ENOMEM;
+ goto iio_device_alloc_error;
+ }
+
+ gdata = iio_priv(indio_dev);
+ gdata->dev = &spi->dev;
+
+ st_sensors_spi_configure(indio_dev, spi, gdata);
+
+ err = st_gyro_common_probe(indio_dev);
+ if (err < 0)
+ goto st_gyro_common_probe_error;
+
+ return 0;
+
+st_gyro_common_probe_error:
+ iio_device_free(indio_dev);
+iio_device_alloc_error:
+ return err;
+}
+
+static int st_gyro_spi_remove(struct spi_device *spi)
+{
+ st_gyro_common_remove(spi_get_drvdata(spi));
+
+ return 0;
+}
+
+static const struct spi_device_id st_gyro_id_table[] = {
+ { L3G4200D_GYRO_DEV_NAME },
+ { LSM330DL_GYRO_DEV_NAME },
+ { L3GD20_GYRO_DEV_NAME },
+ { L3GD20H_GYRO_DEV_NAME },
+ { LSM330DLC_GYRO_DEV_NAME },
+ { L3G4IS_GYRO_DEV_NAME },
+ { LSM330_GYRO_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(spi, st_gyro_id_table);
+
+static struct spi_driver st_gyro_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "st-gyro-spi",
+ },
+ .probe = st_gyro_spi_probe,
+ .remove = st_gyro_spi_remove,
+ .id_table = st_gyro_id_table,
+};
+module_spi_driver(st_gyro_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>");
+MODULE_DESCRIPTION("STMicroelectronics gyroscopes spi driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/iio/gyro/st_gyro.h b/include/linux/iio/gyro/st_gyro.h
new file mode 100644
index 0000000..e19c90f
--- /dev/null
+++ b/include/linux/iio/gyro/st_gyro.h
@@ -0,0 +1,45 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@xxxxxx>
+ * v. 1.0.0
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_GYRO_H
+#define ST_GYRO_H
+
+#include <linux/types.h>
+#include "../common/st_sensors.h"
+
+#define L3G4200D_GYRO_DEV_NAME "l3g4200d"
+#define LSM330DL_GYRO_DEV_NAME "lsm330dl_gyro"
+#define L3GD20_GYRO_DEV_NAME "l3gd20"
+#define L3GD20H_GYRO_DEV_NAME "l3gd20h"
+#define LSM330DLC_GYRO_DEV_NAME "lsm330dlc_gyro"
+#define L3G4IS_GYRO_DEV_NAME "l3g4is_ui"
+#define LSM330_GYRO_DEV_NAME "lsm330_gyro"
+
+int st_gyro_common_probe(struct iio_dev *indio_dev);
+void st_gyro_common_remove(struct iio_dev *indio_dev);
+int st_gyro_set_dataready_irq(struct iio_dev *indio_dev, bool state);
+int st_gyro_set_axis_enable(struct iio_dev *indio_dev, u8 active_bit);
+int st_gyro_set_enable(struct iio_dev *indio_dev, bool enable);
+int st_gyro_trig_set_state(struct iio_trigger *trig, bool state);
+
+#ifdef CONFIG_IIO_BUFFER
+int st_gyro_allocate_ring(struct iio_dev *indio_dev);
+void st_gyro_deallocate_ring(struct iio_dev *indio_dev);
+#else /* CONFIG_IIO_BUFFER */
+static inline int st_gyro_allocate_ring(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+static inline void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
+{
+}
+#endif /* CONFIG_IIO_BUFFER */
+
+#endif /* ST_GYRO_H */
--
1.7.0.4
--
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