iio:gyro: Add STMicroelectronics gyroscopes driver
authorDenis Ciocca <denis.ciocca@gmail.com>
Fri, 25 Jan 2013 23:44:00 +0000 (23:44 +0000)
committerJonathan Cameron <jic23@kernel.org>
Thu, 31 Jan 2013 17:56:43 +0000 (17:56 +0000)
This patch adds a generic gyroscope driver for STMicroelectronics
gyroscopes, currently it supports:
L3G4200D, LSM330DL, L3GD20, L3GD20H, LSM330DLC, L3G4IS, LSM330.

Signed-off-by: Denis Ciocca <denis.ciocca@st.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
drivers/iio/gyro/Kconfig
drivers/iio/gyro/Makefile
drivers/iio/gyro/st_gyro.h [new file with mode: 0644]
drivers/iio/gyro/st_gyro_buffer.c [new file with mode: 0644]
drivers/iio/gyro/st_gyro_core.c [new file with mode: 0644]
drivers/iio/gyro/st_gyro_i2c.c [new file with mode: 0644]
drivers/iio/gyro/st_gyro_spi.c [new file with mode: 0644]

index 752ac8a3448bbf719dec12ea708741f7e3001b6c..c9f177dd4cc74464807e779254d8e45a51e9625c 100644 (file)
@@ -30,4 +30,34 @@ 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
+       select IIO_ST_GYRO_I2C_3AXIS if (I2C)
+       select IIO_ST_GYRO_SPI_3AXIS if (SPI_MASTER)
+       select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
+       select IIO_ST_GYRO_BUFFER if (IIO_TRIGGERED_BUFFER)
+       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, will be created
+         these modules:
+         - st_gyro (core functions for the driver [it is mandatory]);
+         - st_gyro_i2c (necessary for the I2C devices [optional*]);
+         - st_gyro_spi (necessary for the SPI devices [optional*]);
+
+         (*) one of these is necessary to do something.
+
+config IIO_ST_GYRO_I2C_3AXIS
+       tristate
+       depends on IIO_ST_GYRO_3AXIS
+       depends on IIO_ST_SENSORS_I2C
+
+config IIO_ST_GYRO_SPI_3AXIS
+       tristate
+       depends on IIO_ST_GYRO_3AXIS
+       depends on IIO_ST_SENSORS_SPI
+
 endmenu
index 9b090ee084d3a85c75b9e778c80261eb5c245ee7..66b517d9468a4519acc910329990b918e8d3a329 100644 (file)
@@ -5,3 +5,10 @@
 obj-$(CONFIG_ADIS16080) += adis16080.o
 obj-$(CONFIG_ADIS16136) += adis16136.o
 obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
+
+obj-$(CONFIG_IIO_ST_GYRO_3AXIS) += st_gyro.o
+st_gyro-y := st_gyro_core.o
+st_gyro-$(CONFIG_IIO_BUFFER) += st_gyro_buffer.o
+
+obj-$(CONFIG_IIO_ST_GYRO_I2C_3AXIS) += st_gyro_i2c.o
+obj-$(CONFIG_IIO_ST_GYRO_SPI_3AXIS) += st_gyro_spi.o
diff --git a/drivers/iio/gyro/st_gyro.h b/drivers/iio/gyro/st_gyro.h
new file mode 100644 (file)
index 0000000..3ad9907
--- /dev/null
@@ -0,0 +1,45 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ * v. 1.0.0
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_GYRO_H
+#define ST_GYRO_H
+
+#include <linux/types.h>
+#include <linux/iio/common/st_sensors.h>
+
+#define L3G4200D_GYRO_DEV_NAME         "l3g4200d"
+#define LSM330D_GYRO_DEV_NAME          "lsm330d_gyro"
+#define LSM330DL_GYRO_DEV_NAME         "lsm330dl_gyro"
+#define LSM330DLC_GYRO_DEV_NAME                "lsm330dlc_gyro"
+#define L3GD20_GYRO_DEV_NAME           "l3gd20"
+#define L3GD20H_GYRO_DEV_NAME          "l3gd20h"
+#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);
+
+#ifdef CONFIG_IIO_BUFFER
+int st_gyro_allocate_ring(struct iio_dev *indio_dev);
+void st_gyro_deallocate_ring(struct iio_dev *indio_dev);
+int st_gyro_trig_set_state(struct iio_trigger *trig, bool state);
+#define ST_GYRO_TRIGGER_SET_STATE (&st_gyro_trig_set_state)
+#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)
+{
+}
+#define ST_GYRO_TRIGGER_SET_STATE NULL
+#endif /* CONFIG_IIO_BUFFER */
+
+#endif /* ST_GYRO_H */
diff --git a/drivers/iio/gyro/st_gyro_buffer.c b/drivers/iio/gyro/st_gyro_buffer.c
new file mode 100644 (file)
index 0000000..da4d122
--- /dev/null
@@ -0,0 +1,114 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * 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/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/common/st_sensors.h>
+#include "st_gyro.h"
+
+int st_gyro_trig_set_state(struct iio_trigger *trig, bool state)
+{
+       struct iio_dev *indio_dev = trig->private_data;
+
+       return st_sensors_set_dataready_irq(indio_dev, state);
+}
+
+static int st_gyro_buffer_preenable(struct iio_dev *indio_dev)
+{
+       int err;
+
+       err = st_sensors_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_sensors_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_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
+       if (err < 0)
+               goto st_gyro_buffer_predisable_error;
+
+       err = st_sensors_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);
+}
+
+void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
+{
+       iio_triggered_buffer_cleanup(indio_dev);
+}
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+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 (file)
index 0000000..0a09998
--- /dev/null
@@ -0,0 +1,363 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * 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/common/st_sensors.h>
+#include "st_gyro.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_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_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_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_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,
+                       .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,
+                       .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,
+                       .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] = LSM330D_GYRO_DEV_NAME,
+                       [3] = LSM330DLC_GYRO_DEV_NAME,
+                       [4] = L3G4IS_GYRO_DEV_NAME,
+                       [5] = 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,
+                       .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,
+                       .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,
+                       .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:
+               err = st_sensors_read_info_raw(indio_dev, ch, val);
+               if (err < 0)
+                       goto read_error;
+
+               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:
+       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;
+
+       switch (mask) {
+       case IIO_CHAN_INFO_SCALE:
+               err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
+               break;
+       default:
+               err = -EINVAL;
+       }
+
+       return err;
+}
+
+static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
+static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
+static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_anglvel_scale_available);
+
+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,
+};
+
+static const struct iio_trigger_ops st_gyro_trigger_ops = {
+       .owner = THIS_MODULE,
+       .set_trigger_state = ST_GYRO_TRIGGER_SET_STATE,
+};
+
+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_sensors_check_device_support(indio_dev,
+                               ARRAY_SIZE(st_gyro_sensors), st_gyro_sensors);
+       if (err < 0)
+               goto st_gyro_common_probe_error;
+
+       gdata->multiread_bit = gdata->sensor->multi_read_bit;
+       indio_dev->channels = gdata->sensor->ch;
+       indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
+
+       gdata->current_fullscale = (struct st_sensor_fullscale_avl *)
+                                               &gdata->sensor->fs.fs_avl[0];
+       gdata->odr = gdata->sensor->odr.odr_avl[0].hz;
+
+       err = st_sensors_init_sensor(indio_dev);
+       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_trigger_ops);
+               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@st.com>");
+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 (file)
index 0000000..a44b5b4
--- /dev/null
@@ -0,0 +1,85 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * 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/common/st_sensors.h>
+#include <linux/iio/common/st_sensors_i2c.h>
+#include "st_gyro.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 },
+       { LSM330D_GYRO_DEV_NAME },
+       { LSM330DL_GYRO_DEV_NAME },
+       { LSM330DLC_GYRO_DEV_NAME },
+       { L3GD20_GYRO_DEV_NAME },
+       { L3GD20H_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@st.com>");
+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 (file)
index 0000000..8b4dcc5
--- /dev/null
@@ -0,0 +1,84 @@
+/*
+ * STMicroelectronics gyroscopes driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * 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/common/st_sensors.h>
+#include <linux/iio/common/st_sensors_spi.h>
+#include "st_gyro.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 },
+       { LSM330D_GYRO_DEV_NAME },
+       { LSM330DL_GYRO_DEV_NAME },
+       { LSM330DLC_GYRO_DEV_NAME },
+       { L3GD20_GYRO_DEV_NAME },
+       { L3GD20H_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@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics gyroscopes spi driver");
+MODULE_LICENSE("GPL v2");