iio:common: Add STMicroelectronics common library
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 add a generic library for STMicroelectronics 3-axis sensors.

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>
12 files changed:
drivers/iio/common/Kconfig
drivers/iio/common/Makefile
drivers/iio/common/st_sensors/Kconfig [new file with mode: 0644]
drivers/iio/common/st_sensors/Makefile [new file with mode: 0644]
drivers/iio/common/st_sensors/st_sensors_buffer.c [new file with mode: 0644]
drivers/iio/common/st_sensors/st_sensors_core.c [new file with mode: 0644]
drivers/iio/common/st_sensors/st_sensors_i2c.c [new file with mode: 0644]
drivers/iio/common/st_sensors/st_sensors_spi.c [new file with mode: 0644]
drivers/iio/common/st_sensors/st_sensors_trigger.c [new file with mode: 0644]
include/linux/iio/common/st_sensors.h [new file with mode: 0644]
include/linux/iio/common/st_sensors_i2c.h [new file with mode: 0644]
include/linux/iio/common/st_sensors_spi.h [new file with mode: 0644]

index ed45ee54500c2b56f1391fb8912518e4c0db2898..0b6e97d18fa00a7ccf799d18eb0b568505e54b6b 100644 (file)
@@ -3,3 +3,4 @@
 #
 
 source "drivers/iio/common/hid-sensors/Kconfig"
+source "drivers/iio/common/st_sensors/Kconfig"
index 81584009b21b121df9ab7b6ee3420fdab5e9e86e..c2352beb5d973540f37dcb0ad7a7057077a95013 100644 (file)
@@ -7,3 +7,4 @@
 #
 
 obj-y += hid-sensors/
+obj-y += st_sensors/
diff --git a/drivers/iio/common/st_sensors/Kconfig b/drivers/iio/common/st_sensors/Kconfig
new file mode 100644 (file)
index 0000000..865f1ca
--- /dev/null
@@ -0,0 +1,14 @@
+#
+# STMicroelectronics sensors common library
+#
+
+config IIO_ST_SENSORS_I2C
+       tristate
+
+config IIO_ST_SENSORS_SPI
+       tristate
+
+config IIO_ST_SENSORS_CORE
+       tristate
+       select IIO_ST_SENSORS_I2C if I2C
+       select IIO_ST_SENSORS_SPI if SPI_MASTER
diff --git a/drivers/iio/common/st_sensors/Makefile b/drivers/iio/common/st_sensors/Makefile
new file mode 100644 (file)
index 0000000..9f3e24f
--- /dev/null
@@ -0,0 +1,10 @@
+#
+# Makefile for the STMicroelectronics sensor common modules.
+#
+
+obj-$(CONFIG_IIO_ST_SENSORS_I2C) += st_sensors_i2c.o
+obj-$(CONFIG_IIO_ST_SENSORS_SPI) += st_sensors_spi.o
+obj-$(CONFIG_IIO_ST_SENSORS_CORE) += st_sensors.o
+st_sensors-y := st_sensors_core.o
+st_sensors-$(CONFIG_IIO_BUFFER) += st_sensors_buffer.o
+st_sensors-$(CONFIG_IIO_TRIGGER) += st_sensors_trigger.o
diff --git a/drivers/iio/common/st_sensors/st_sensors_buffer.c b/drivers/iio/common/st_sensors/st_sensors_buffer.c
new file mode 100644 (file)
index 0000000..09b236d
--- /dev/null
@@ -0,0 +1,116 @@
+/*
+ * STMicroelectronics sensors buffer library 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/iio/iio.h>
+#include <linux/iio/trigger.h>
+#include <linux/interrupt.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/irqreturn.h>
+
+#include <linux/iio/common/st_sensors.h>
+
+
+int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf)
+{
+       int i, n = 0, len;
+       u8 addr[ST_SENSORS_NUMBER_DATA_CHANNELS];
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       for (i = 0; i < ST_SENSORS_NUMBER_DATA_CHANNELS; i++) {
+               if (test_bit(i, indio_dev->active_scan_mask)) {
+                       addr[n] = indio_dev->channels[i].address;
+                       n++;
+               }
+       }
+       switch (n) {
+       case 1:
+               len = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev,
+                       addr[0], ST_SENSORS_BYTE_FOR_CHANNEL, buf,
+                       sdata->multiread_bit);
+               break;
+       case 2:
+               if ((addr[1] - addr[0]) == ST_SENSORS_BYTE_FOR_CHANNEL) {
+                       len = sdata->tf->read_multiple_byte(&sdata->tb,
+                                       sdata->dev, addr[0],
+                                       ST_SENSORS_BYTE_FOR_CHANNEL*n,
+                                       buf, sdata->multiread_bit);
+               } else {
+                       u8 rx_array[ST_SENSORS_BYTE_FOR_CHANNEL*
+                                   ST_SENSORS_NUMBER_DATA_CHANNELS];
+                       len = sdata->tf->read_multiple_byte(&sdata->tb,
+                               sdata->dev, addr[0],
+                               ST_SENSORS_BYTE_FOR_CHANNEL*
+                               ST_SENSORS_NUMBER_DATA_CHANNELS,
+                               rx_array, sdata->multiread_bit);
+                       if (len < 0)
+                               goto read_data_channels_error;
+
+                       for (i = 0; i < n * ST_SENSORS_NUMBER_DATA_CHANNELS;
+                                                                       i++) {
+                               if (i < n)
+                                       buf[i] = rx_array[i];
+                               else
+                                       buf[i] = rx_array[n + i];
+                       }
+                       len = ST_SENSORS_BYTE_FOR_CHANNEL*n;
+               }
+               break;
+       case 3:
+               len = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev,
+                       addr[0], ST_SENSORS_BYTE_FOR_CHANNEL*
+                       ST_SENSORS_NUMBER_DATA_CHANNELS,
+                       buf, sdata->multiread_bit);
+               break;
+       default:
+               len = -EINVAL;
+               goto read_data_channels_error;
+       }
+       if (len != ST_SENSORS_BYTE_FOR_CHANNEL*n) {
+               len = -EIO;
+               goto read_data_channels_error;
+       }
+
+read_data_channels_error:
+       return len;
+}
+EXPORT_SYMBOL(st_sensors_get_buffer_element);
+
+irqreturn_t st_sensors_trigger_handler(int irq, void *p)
+{
+       int len;
+       struct iio_poll_func *pf = p;
+       struct iio_dev *indio_dev = pf->indio_dev;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       len = st_sensors_get_buffer_element(indio_dev, sdata->buffer_data);
+       if (len < 0)
+               goto st_sensors_get_buffer_element_error;
+
+       if (indio_dev->scan_timestamp)
+               *(s64 *)((u8 *)sdata->buffer_data +
+                               ALIGN(len, sizeof(s64))) = pf->timestamp;
+
+       iio_push_to_buffers(indio_dev, sdata->buffer_data);
+
+st_sensors_get_buffer_element_error:
+       iio_trigger_notify_done(indio_dev->trig);
+
+       return IRQ_HANDLED;
+}
+EXPORT_SYMBOL(st_sensors_trigger_handler);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics ST-sensors buffer");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c
new file mode 100644 (file)
index 0000000..fba6d68
--- /dev/null
@@ -0,0 +1,460 @@
+/*
+ * STMicroelectronics sensors core library 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/delay.h>
+#include <linux/iio/iio.h>
+#include <asm/unaligned.h>
+
+#include <linux/iio/common/st_sensors.h>
+
+
+#define ST_SENSORS_WAI_ADDRESS         0x0f
+
+static int st_sensors_write_data_with_mask(struct iio_dev *indio_dev,
+                                               u8 reg_addr, u8 mask, u8 data)
+{
+       int err;
+       u8 new_data;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       err = sdata->tf->read_byte(&sdata->tb, sdata->dev, reg_addr, &new_data);
+       if (err < 0)
+               goto st_sensors_write_data_with_mask_error;
+
+       new_data = ((new_data & (~mask)) | ((data << __ffs(mask)) & mask));
+       err = sdata->tf->write_byte(&sdata->tb, sdata->dev, reg_addr, new_data);
+
+st_sensors_write_data_with_mask_error:
+       return err;
+}
+
+int st_sensors_get_sampling_frequency_avl(struct iio_dev *indio_dev, char *buf)
+{
+       int i, len = 0;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       mutex_lock(&indio_dev->mlock);
+       for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) {
+               if (sdata->sensor->odr.odr_avl[i].hz == 0)
+                       break;
+
+               len += scnprintf(buf + len, PAGE_SIZE - len, "%d ",
+                                       sdata->sensor->odr.odr_avl[i].hz);
+       }
+       mutex_unlock(&indio_dev->mlock);
+       buf[len - 1] = '\n';
+
+       return len;
+}
+EXPORT_SYMBOL(st_sensors_get_sampling_frequency_avl);
+
+int st_sensors_get_scale_avl(struct iio_dev *indio_dev, char *buf)
+{
+       int i, len = 0;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       mutex_lock(&indio_dev->mlock);
+       for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) {
+               if (sdata->sensor->fs.fs_avl[i].num == 0)
+                       break;
+
+               len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06u ",
+                                       sdata->sensor->fs.fs_avl[i].gain);
+       }
+       mutex_unlock(&indio_dev->mlock);
+       buf[len - 1] = '\n';
+
+       return len;
+}
+EXPORT_SYMBOL(st_sensors_get_scale_avl);
+
+static int st_sensors_match_odr(struct st_sensors *sensor,
+                       unsigned int odr, struct st_sensor_odr_avl *odr_out)
+{
+       int i, ret = -EINVAL;
+
+       for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) {
+               if (sensor->odr.odr_avl[i].hz == 0)
+                       goto st_sensors_match_odr_error;
+
+               if (sensor->odr.odr_avl[i].hz == odr) {
+                       odr_out->hz = sensor->odr.odr_avl[i].hz;
+                       odr_out->value = sensor->odr.odr_avl[i].value;
+                       ret = 0;
+                       break;
+               }
+       }
+
+st_sensors_match_odr_error:
+       return ret;
+}
+
+int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr)
+{
+       int err;
+       struct st_sensor_odr_avl odr_out;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       err = st_sensors_match_odr(sdata->sensor, odr, &odr_out);
+       if (err < 0)
+               goto st_sensors_match_odr_error;
+
+       if ((sdata->sensor->odr.addr == sdata->sensor->pw.addr) &&
+                       (sdata->sensor->odr.mask == sdata->sensor->pw.mask)) {
+               if (sdata->enabled == true) {
+                       err = st_sensors_write_data_with_mask(indio_dev,
+                               sdata->sensor->odr.addr,
+                               sdata->sensor->odr.mask,
+                               odr_out.value);
+               } else {
+                       err = 0;
+               }
+       } else {
+               err = st_sensors_write_data_with_mask(indio_dev,
+                       sdata->sensor->odr.addr, sdata->sensor->odr.mask,
+                       odr_out.value);
+       }
+       if (err >= 0)
+               sdata->odr = odr_out.hz;
+
+st_sensors_match_odr_error:
+       return err;
+}
+EXPORT_SYMBOL(st_sensors_set_odr);
+
+static int st_sensors_match_fs(struct st_sensors *sensor,
+                                       unsigned int fs, int *index_fs_avl)
+{
+       int i, ret = -EINVAL;
+
+       for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) {
+               if (sensor->fs.fs_avl[i].num == 0)
+                       goto st_sensors_match_odr_error;
+
+               if (sensor->fs.fs_avl[i].num == fs) {
+                       *index_fs_avl = i;
+                       ret = 0;
+                       break;
+               }
+       }
+
+st_sensors_match_odr_error:
+       return ret;
+}
+
+static int st_sensors_set_fullscale(struct iio_dev *indio_dev, unsigned int fs)
+{
+       int err, i;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       err = st_sensors_match_fs(sdata->sensor, fs, &i);
+       if (err < 0)
+               goto st_accel_set_fullscale_error;
+
+       err = st_sensors_write_data_with_mask(indio_dev,
+                               sdata->sensor->fs.addr,
+                               sdata->sensor->fs.mask,
+                               sdata->sensor->fs.fs_avl[i].value);
+       if (err < 0)
+               goto st_accel_set_fullscale_error;
+
+       sdata->current_fullscale = (struct st_sensor_fullscale_avl *)
+                                               &sdata->sensor->fs.fs_avl[i];
+       return err;
+
+st_accel_set_fullscale_error:
+       dev_err(&indio_dev->dev, "failed to set new fullscale.\n");
+       return err;
+}
+
+int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable)
+{
+       bool found;
+       u8 tmp_value;
+       int err = -EINVAL;
+       struct st_sensor_odr_avl odr_out;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       if (enable) {
+               found = false;
+               tmp_value = sdata->sensor->pw.value_on;
+               if ((sdata->sensor->odr.addr == sdata->sensor->pw.addr) &&
+                       (sdata->sensor->odr.mask == sdata->sensor->pw.mask)) {
+                       err = st_sensors_match_odr(sdata->sensor,
+                                                       sdata->odr, &odr_out);
+                       if (err < 0)
+                               goto set_enable_error;
+                       tmp_value = odr_out.value;
+                       found = true;
+               }
+               err = st_sensors_write_data_with_mask(indio_dev,
+                               sdata->sensor->pw.addr,
+                               sdata->sensor->pw.mask, tmp_value);
+               if (err < 0)
+                       goto set_enable_error;
+
+               sdata->enabled = true;
+
+               if (found)
+                       sdata->odr = odr_out.hz;
+       } else {
+               err = st_sensors_write_data_with_mask(indio_dev,
+                               sdata->sensor->pw.addr,
+                               sdata->sensor->pw.mask,
+                               sdata->sensor->pw.value_off);
+               if (err < 0)
+                       goto set_enable_error;
+
+               sdata->enabled = false;
+       }
+
+set_enable_error:
+       return err;
+}
+EXPORT_SYMBOL(st_sensors_set_enable);
+
+int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable)
+{
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       return st_sensors_write_data_with_mask(indio_dev,
+                               sdata->sensor->enable_axis.addr,
+                               sdata->sensor->enable_axis.mask, axis_enable);
+}
+EXPORT_SYMBOL(st_sensors_set_axis_enable);
+
+int st_sensors_init_sensor(struct iio_dev *indio_dev)
+{
+       int err;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       mutex_init(&sdata->tb.buf_lock);
+
+       err = st_sensors_set_enable(indio_dev, false);
+       if (err < 0)
+               goto init_error;
+
+       err = st_sensors_set_fullscale(indio_dev,
+                                               sdata->current_fullscale->num);
+       if (err < 0)
+               goto init_error;
+
+       err = st_sensors_set_odr(indio_dev, sdata->odr);
+       if (err < 0)
+               goto init_error;
+
+       /* set BDU */
+       err = st_sensors_write_data_with_mask(indio_dev,
+                       sdata->sensor->bdu.addr, sdata->sensor->bdu.mask, true);
+       if (err < 0)
+               goto init_error;
+
+       err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
+
+init_error:
+       return err;
+}
+EXPORT_SYMBOL(st_sensors_init_sensor);
+
+int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable)
+{
+       int err;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       /* Enable/Disable the interrupt generator 1. */
+       if (sdata->sensor->drdy_irq.ig1.en_addr > 0) {
+               err = st_sensors_write_data_with_mask(indio_dev,
+                       sdata->sensor->drdy_irq.ig1.en_addr,
+                       sdata->sensor->drdy_irq.ig1.en_mask, (int)enable);
+               if (err < 0)
+                       goto st_accel_set_dataready_irq_error;
+       }
+
+       /* Enable/Disable the interrupt generator for data ready. */
+       err = st_sensors_write_data_with_mask(indio_dev,
+                       sdata->sensor->drdy_irq.addr,
+                       sdata->sensor->drdy_irq.mask, (int)enable);
+
+st_accel_set_dataready_irq_error:
+       return err;
+}
+EXPORT_SYMBOL(st_sensors_set_dataready_irq);
+
+int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale)
+{
+       int err = -EINVAL, i;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) {
+               if ((sdata->sensor->fs.fs_avl[i].gain == scale) &&
+                               (sdata->sensor->fs.fs_avl[i].gain != 0)) {
+                       err = 0;
+                       break;
+               }
+       }
+       if (err < 0)
+               goto st_sensors_match_scale_error;
+
+       err = st_sensors_set_fullscale(indio_dev,
+                                       sdata->sensor->fs.fs_avl[i].num);
+
+st_sensors_match_scale_error:
+       return err;
+}
+EXPORT_SYMBOL(st_sensors_set_fullscale_by_gain);
+
+static int st_sensors_read_axis_data(struct iio_dev *indio_dev,
+                                                       u8 ch_addr, int *data)
+{
+       int err;
+       u8 outdata[ST_SENSORS_BYTE_FOR_CHANNEL];
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       err = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev,
+                               ch_addr, ST_SENSORS_BYTE_FOR_CHANNEL,
+                               outdata, sdata->multiread_bit);
+       if (err < 0)
+               goto read_error;
+
+       *data = (s16)get_unaligned_le16(outdata);
+
+read_error:
+       return err;
+}
+
+int st_sensors_read_info_raw(struct iio_dev *indio_dev,
+                               struct iio_chan_spec const *ch, int *val)
+{
+       int err;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       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, true);
+               if (err < 0)
+                       goto read_error;
+
+               msleep((sdata->sensor->bootime * 1000) / sdata->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 err;
+
+read_error:
+       mutex_unlock(&indio_dev->mlock);
+       return err;
+}
+EXPORT_SYMBOL(st_sensors_read_info_raw);
+
+int st_sensors_check_device_support(struct iio_dev *indio_dev,
+                       int num_sensors_list, const struct st_sensors *sensors)
+{
+       u8 wai;
+       int i, n, err;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       err = sdata->tf->read_byte(&sdata->tb, sdata->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 < num_sensors_list; i++) {
+               if (sensors[i].wai == wai)
+                       break;
+       }
+       if (i == num_sensors_list)
+               goto device_not_supported;
+
+       for (n = 0; n < ARRAY_SIZE(sensors[i].sensors_supported); n++) {
+               if (strcmp(indio_dev->name,
+                               &sensors[i].sensors_supported[n][0]) == 0)
+                       break;
+       }
+       if (n == ARRAY_SIZE(sensors[i].sensors_supported)) {
+               dev_err(&indio_dev->dev, "device name and WhoAmI mismatch.\n");
+               goto sensor_name_mismatch;
+       }
+
+       sdata->sensor = (struct st_sensors *)&sensors[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;
+}
+EXPORT_SYMBOL(st_sensors_check_device_support);
+
+ssize_t st_sensors_sysfs_get_sampling_frequency(struct device *dev,
+                               struct device_attribute *attr, char *buf)
+{
+       struct st_sensor_data *adata = iio_priv(dev_get_drvdata(dev));
+
+       return sprintf(buf, "%d\n", adata->odr);
+}
+EXPORT_SYMBOL(st_sensors_sysfs_get_sampling_frequency);
+
+ssize_t st_sensors_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);
+
+       err = kstrtoint(buf, 10, &odr);
+       if (err < 0)
+               goto conversion_error;
+
+       mutex_lock(&indio_dev->mlock);
+       err = st_sensors_set_odr(indio_dev, odr);
+       mutex_unlock(&indio_dev->mlock);
+
+conversion_error:
+       return err < 0 ? err : size;
+}
+EXPORT_SYMBOL(st_sensors_sysfs_set_sampling_frequency);
+
+ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev,
+                               struct device_attribute *attr, char *buf)
+{
+       struct iio_dev *indio_dev = dev_get_drvdata(dev);
+
+       return st_sensors_get_sampling_frequency_avl(indio_dev, buf);
+}
+EXPORT_SYMBOL(st_sensors_sysfs_sampling_frequency_avail);
+
+ssize_t st_sensors_sysfs_scale_avail(struct device *dev,
+                               struct device_attribute *attr, char *buf)
+{
+       struct iio_dev *indio_dev = dev_get_drvdata(dev);
+
+       return st_sensors_get_scale_avl(indio_dev, buf);
+}
+EXPORT_SYMBOL(st_sensors_sysfs_scale_avail);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics ST-sensors core");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c
new file mode 100644 (file)
index 0000000..38af944
--- /dev/null
@@ -0,0 +1,81 @@
+/*
+ * STMicroelectronics sensors i2c library 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/iio/iio.h>
+
+#include <linux/iio/common/st_sensors_i2c.h>
+
+
+#define ST_SENSORS_I2C_MULTIREAD       0x80
+
+static unsigned int st_sensors_i2c_get_irq(struct iio_dev *indio_dev)
+{
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       return to_i2c_client(sdata->dev)->irq;
+}
+
+static int st_sensors_i2c_read_byte(struct st_sensor_transfer_buffer *tb,
+                               struct device *dev, u8 reg_addr, u8 *res_byte)
+{
+       int err;
+
+       err = i2c_smbus_read_byte_data(to_i2c_client(dev), reg_addr);
+       if (err < 0)
+               goto st_accel_i2c_read_byte_error;
+
+       *res_byte = err & 0xff;
+
+st_accel_i2c_read_byte_error:
+       return err < 0 ? err : 0;
+}
+
+static int st_sensors_i2c_read_multiple_byte(
+               struct st_sensor_transfer_buffer *tb, struct device *dev,
+                       u8 reg_addr, int len, u8 *data, bool multiread_bit)
+{
+       if (multiread_bit)
+               reg_addr |= ST_SENSORS_I2C_MULTIREAD;
+
+       return i2c_smbus_read_i2c_block_data(to_i2c_client(dev),
+                                                       reg_addr, len, data);
+}
+
+static int st_sensors_i2c_write_byte(struct st_sensor_transfer_buffer *tb,
+                               struct device *dev, u8 reg_addr, u8 data)
+{
+       return i2c_smbus_write_byte_data(to_i2c_client(dev), reg_addr, data);
+}
+
+static const struct st_sensor_transfer_function st_sensors_tf_i2c = {
+       .read_byte = st_sensors_i2c_read_byte,
+       .write_byte = st_sensors_i2c_write_byte,
+       .read_multiple_byte = st_sensors_i2c_read_multiple_byte,
+};
+
+void st_sensors_i2c_configure(struct iio_dev *indio_dev,
+               struct i2c_client *client, struct st_sensor_data *sdata)
+{
+       i2c_set_clientdata(client, indio_dev);
+
+       indio_dev->dev.parent = &client->dev;
+       indio_dev->name = client->name;
+
+       sdata->tf = &st_sensors_tf_i2c;
+       sdata->get_irq_data_ready = st_sensors_i2c_get_irq;
+}
+EXPORT_SYMBOL(st_sensors_i2c_configure);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/common/st_sensors/st_sensors_spi.c b/drivers/iio/common/st_sensors/st_sensors_spi.c
new file mode 100644 (file)
index 0000000..f0aa2f1
--- /dev/null
@@ -0,0 +1,128 @@
+/*
+ * STMicroelectronics sensors spi library 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/iio/iio.h>
+
+#include <linux/iio/common/st_sensors_spi.h>
+
+
+#define ST_SENSORS_SPI_MULTIREAD       0xc0
+#define ST_SENSORS_SPI_READ            0x80
+
+static unsigned int st_sensors_spi_get_irq(struct iio_dev *indio_dev)
+{
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       return to_spi_device(sdata->dev)->irq;
+}
+
+static int st_sensors_spi_read(struct st_sensor_transfer_buffer *tb,
+       struct device *dev, u8 reg_addr, int len, u8 *data, bool multiread_bit)
+{
+       struct spi_message msg;
+       int err;
+
+       struct spi_transfer xfers[] = {
+               {
+                       .tx_buf = tb->tx_buf,
+                       .bits_per_word = 8,
+                       .len = 1,
+               },
+               {
+                       .rx_buf = tb->rx_buf,
+                       .bits_per_word = 8,
+                       .len = len,
+               }
+       };
+
+       mutex_lock(&tb->buf_lock);
+       if ((multiread_bit) && (len > 1))
+               tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_MULTIREAD;
+       else
+               tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_READ;
+
+       spi_message_init(&msg);
+       spi_message_add_tail(&xfers[0], &msg);
+       spi_message_add_tail(&xfers[1], &msg);
+       err = spi_sync(to_spi_device(dev), &msg);
+       if (err)
+               goto acc_spi_read_error;
+
+       memcpy(data, tb->rx_buf, len*sizeof(u8));
+       mutex_unlock(&tb->buf_lock);
+       return len;
+
+acc_spi_read_error:
+       mutex_unlock(&tb->buf_lock);
+       return err;
+}
+
+static int st_sensors_spi_read_byte(struct st_sensor_transfer_buffer *tb,
+                               struct device *dev, u8 reg_addr, u8 *res_byte)
+{
+       return st_sensors_spi_read(tb, dev, reg_addr, 1, res_byte, false);
+}
+
+static int st_sensors_spi_read_multiple_byte(
+       struct st_sensor_transfer_buffer *tb, struct device *dev,
+                       u8 reg_addr, int len, u8 *data, bool multiread_bit)
+{
+       return st_sensors_spi_read(tb, dev, reg_addr, len, data, multiread_bit);
+}
+
+static int st_sensors_spi_write_byte(struct st_sensor_transfer_buffer *tb,
+                               struct device *dev, u8 reg_addr, u8 data)
+{
+       struct spi_message msg;
+       int err;
+
+       struct spi_transfer xfers = {
+               .tx_buf = tb->tx_buf,
+               .bits_per_word = 8,
+               .len = 2,
+       };
+
+       mutex_lock(&tb->buf_lock);
+       tb->tx_buf[0] = reg_addr;
+       tb->tx_buf[1] = data;
+
+       spi_message_init(&msg);
+       spi_message_add_tail(&xfers, &msg);
+       err = spi_sync(to_spi_device(dev), &msg);
+       mutex_unlock(&tb->buf_lock);
+
+       return err;
+}
+
+static const struct st_sensor_transfer_function st_sensors_tf_spi = {
+       .read_byte = st_sensors_spi_read_byte,
+       .write_byte = st_sensors_spi_write_byte,
+       .read_multiple_byte = st_sensors_spi_read_multiple_byte,
+};
+
+void st_sensors_spi_configure(struct iio_dev *indio_dev,
+                       struct spi_device *spi, struct st_sensor_data *sdata)
+{
+       spi_set_drvdata(spi, indio_dev);
+
+       indio_dev->dev.parent = &spi->dev;
+       indio_dev->name = spi->modalias;
+
+       sdata->tf = &st_sensors_tf_spi;
+       sdata->get_irq_data_ready = st_sensors_spi_get_irq;
+}
+EXPORT_SYMBOL(st_sensors_spi_configure);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics ST-sensors spi driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/common/st_sensors/st_sensors_trigger.c b/drivers/iio/common/st_sensors/st_sensors_trigger.c
new file mode 100644 (file)
index 0000000..139ed03
--- /dev/null
@@ -0,0 +1,77 @@
+/*
+ * STMicroelectronics sensors trigger library 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/iio/iio.h>
+#include <linux/iio/trigger.h>
+#include <linux/interrupt.h>
+
+#include <linux/iio/common/st_sensors.h>
+
+
+int st_sensors_allocate_trigger(struct iio_dev *indio_dev,
+                               const struct iio_trigger_ops *trigger_ops)
+{
+       int err;
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       sdata->trig = iio_trigger_alloc("%s-trigger", indio_dev->name);
+       if (sdata->trig == NULL) {
+               err = -ENOMEM;
+               dev_err(&indio_dev->dev, "failed to allocate iio trigger.\n");
+               goto iio_trigger_alloc_error;
+       }
+
+       err = request_threaded_irq(sdata->get_irq_data_ready(indio_dev),
+                       iio_trigger_generic_data_rdy_poll,
+                       NULL,
+                       IRQF_TRIGGER_RISING,
+                       sdata->trig->name,
+                       sdata->trig);
+       if (err)
+               goto request_irq_error;
+
+       sdata->trig->private_data = indio_dev;
+       sdata->trig->ops = trigger_ops;
+       sdata->trig->dev.parent = sdata->dev;
+
+       err = iio_trigger_register(sdata->trig);
+       if (err < 0) {
+               dev_err(&indio_dev->dev, "failed to register iio trigger.\n");
+               goto iio_trigger_register_error;
+       }
+       indio_dev->trig = sdata->trig;
+
+       return 0;
+
+iio_trigger_register_error:
+       free_irq(sdata->get_irq_data_ready(indio_dev), sdata->trig);
+request_irq_error:
+       iio_trigger_free(sdata->trig);
+iio_trigger_alloc_error:
+       return err;
+}
+EXPORT_SYMBOL(st_sensors_allocate_trigger);
+
+void st_sensors_deallocate_trigger(struct iio_dev *indio_dev)
+{
+       struct st_sensor_data *sdata = iio_priv(indio_dev);
+
+       iio_trigger_unregister(sdata->trig);
+       free_irq(sdata->get_irq_data_ready(indio_dev), sdata->trig);
+       iio_trigger_free(sdata->trig);
+}
+EXPORT_SYMBOL(st_sensors_deallocate_trigger);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics ST-sensors trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h
new file mode 100644 (file)
index 0000000..3cc8571
--- /dev/null
@@ -0,0 +1,274 @@
+/*
+ * STMicroelectronics sensors library driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_SENSORS_H
+#define ST_SENSORS_H
+
+#include <linux/i2c.h>
+#include <linux/spi/spi.h>
+#include <linux/irqreturn.h>
+#include <linux/iio/trigger.h>
+
+#define ST_SENSORS_TX_MAX_LENGTH               2
+#define ST_SENSORS_RX_MAX_LENGTH               6
+
+#define ST_SENSORS_ODR_LIST_MAX                        10
+#define ST_SENSORS_FULLSCALE_AVL_MAX           10
+
+#define ST_SENSORS_NUMBER_ALL_CHANNELS         4
+#define ST_SENSORS_NUMBER_DATA_CHANNELS                3
+#define ST_SENSORS_ENABLE_ALL_AXIS             0x07
+#define ST_SENSORS_BYTE_FOR_CHANNEL            2
+#define ST_SENSORS_SCAN_X                      0
+#define ST_SENSORS_SCAN_Y                      1
+#define ST_SENSORS_SCAN_Z                      2
+#define ST_SENSORS_DEFAULT_12_REALBITS         12
+#define ST_SENSORS_DEFAULT_16_REALBITS         16
+#define ST_SENSORS_DEFAULT_POWER_ON_VALUE      0x01
+#define ST_SENSORS_DEFAULT_POWER_OFF_VALUE     0x00
+#define ST_SENSORS_DEFAULT_WAI_ADDRESS         0x0f
+#define ST_SENSORS_DEFAULT_AXIS_ADDR           0x20
+#define ST_SENSORS_DEFAULT_AXIS_MASK           0x07
+#define ST_SENSORS_DEFAULT_AXIS_N_BIT          3
+
+#define ST_SENSORS_MAX_NAME                    17
+#define ST_SENSORS_MAX_4WAI                    7
+
+#define ST_SENSORS_LSM_CHANNELS(device_type, index, mod, endian, bits, addr) \
+{ \
+       .type = device_type, \
+       .modified = 1, \
+       .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+                       IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \
+       .scan_index = index, \
+       .channel2 = mod, \
+       .address = addr, \
+       .scan_type = { \
+               .sign = 's', \
+               .realbits = bits, \
+               .shift = 16 - bits, \
+               .storagebits = 16, \
+               .endianness = endian, \
+       }, \
+}
+
+#define ST_SENSOR_DEV_ATTR_SAMP_FREQ() \
+               IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, \
+                       st_sensors_sysfs_get_sampling_frequency, \
+                       st_sensors_sysfs_set_sampling_frequency)
+
+#define ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL() \
+               IIO_DEV_ATTR_SAMP_FREQ_AVAIL( \
+                       st_sensors_sysfs_sampling_frequency_avail)
+
+#define ST_SENSORS_DEV_ATTR_SCALE_AVAIL(name) \
+               IIO_DEVICE_ATTR(name, S_IRUGO, \
+                       st_sensors_sysfs_scale_avail, NULL , 0);
+
+struct st_sensor_odr_avl {
+       unsigned int hz;
+       u8 value;
+};
+
+struct st_sensor_odr {
+       u8 addr;
+       u8 mask;
+       struct st_sensor_odr_avl odr_avl[ST_SENSORS_ODR_LIST_MAX];
+};
+
+struct st_sensor_power {
+       u8 addr;
+       u8 mask;
+       u8 value_off;
+       u8 value_on;
+};
+
+struct st_sensor_axis {
+       u8 addr;
+       u8 mask;
+};
+
+struct st_sensor_fullscale_avl {
+       unsigned int num;
+       u8 value;
+       unsigned int gain;
+       unsigned int gain2;
+};
+
+struct st_sensor_fullscale {
+       u8 addr;
+       u8 mask;
+       struct st_sensor_fullscale_avl fs_avl[ST_SENSORS_FULLSCALE_AVL_MAX];
+};
+
+/**
+ * struct st_sensor_bdu - ST sensor device block data update
+ * @addr: address of the register.
+ * @mask: mask to write the block data update flag.
+ */
+struct st_sensor_bdu {
+       u8 addr;
+       u8 mask;
+};
+
+/**
+ * struct st_sensor_data_ready_irq - ST sensor device data-ready interrupt
+ * @addr: address of the register.
+ * @mask: mask to write the on/off value.
+ * struct ig1 - represents the Interrupt Generator 1 of sensors.
+ * @en_addr: address of the enable ig1 register.
+ * @en_mask: mask to write the on/off value for enable.
+ */
+struct st_sensor_data_ready_irq {
+       u8 addr;
+       u8 mask;
+       struct {
+               u8 en_addr;
+               u8 en_mask;
+       } ig1;
+};
+
+/**
+ * struct st_sensor_transfer_buffer - ST sensor device I/O buffer
+ * @buf_lock: Mutex to protect rx and tx buffers.
+ * @tx_buf: Buffer used by SPI transfer function to send data to the sensors.
+ *     This buffer is used to avoid DMA not-aligned issue.
+ * @rx_buf: Buffer used by SPI transfer to receive data from sensors.
+ *     This buffer is used to avoid DMA not-aligned issue.
+ */
+struct st_sensor_transfer_buffer {
+       struct mutex buf_lock;
+       u8 rx_buf[ST_SENSORS_RX_MAX_LENGTH];
+       u8 tx_buf[ST_SENSORS_TX_MAX_LENGTH] ____cacheline_aligned;
+};
+
+/**
+ * struct st_sensor_transfer_function - ST sensor device I/O function
+ * @read_byte: Function used to read one byte.
+ * @write_byte: Function used to write one byte.
+ * @read_multiple_byte: Function used to read multiple byte.
+ */
+struct st_sensor_transfer_function {
+       int (*read_byte) (struct st_sensor_transfer_buffer *tb,
+                               struct device *dev, u8 reg_addr, u8 *res_byte);
+       int (*write_byte) (struct st_sensor_transfer_buffer *tb,
+                               struct device *dev, u8 reg_addr, u8 data);
+       int (*read_multiple_byte) (struct st_sensor_transfer_buffer *tb,
+               struct device *dev, u8 reg_addr, int len, u8 *data,
+                                                       bool multiread_bit);
+};
+
+/**
+ * struct st_sensors - ST sensors list
+ * @wai: Contents of WhoAmI register.
+ * @sensors_supported: List of supported sensors by struct itself.
+ * @ch: IIO channels for the sensor.
+ * @odr: Output data rate register and ODR list available.
+ * @pw: Power register of the sensor.
+ * @enable_axis: Enable one or more axis of the sensor.
+ * @fs: Full scale register and full scale list available.
+ * @bdu: Block data update register.
+ * @drdy_irq: Data ready register of the sensor.
+ * @multi_read_bit: Use or not particular bit for [I2C/SPI] multi-read.
+ * @bootime: samples to discard when sensor passing from power-down to power-up.
+ */
+struct st_sensors {
+       u8 wai;
+       char sensors_supported[ST_SENSORS_MAX_4WAI][ST_SENSORS_MAX_NAME];
+       struct iio_chan_spec *ch;
+       struct st_sensor_odr odr;
+       struct st_sensor_power pw;
+       struct st_sensor_axis enable_axis;
+       struct st_sensor_fullscale fs;
+       struct st_sensor_bdu bdu;
+       struct st_sensor_data_ready_irq drdy_irq;
+       bool multi_read_bit;
+       unsigned int bootime;
+};
+
+/**
+ * struct st_sensor_data - ST sensor device status
+ * @dev: Pointer to instance of struct device (I2C or SPI).
+ * @trig: The trigger in use by the core driver.
+ * @sensor: Pointer to the current sensor struct in use.
+ * @current_fullscale: Maximum range of measure by the sensor.
+ * @enabled: Status of the sensor (false->off, true->on).
+ * @multiread_bit: Use or not particular bit for [I2C/SPI] multiread.
+ * @buffer_data: Data used by buffer part.
+ * @odr: Output data rate of the sensor [Hz].
+ * @get_irq_data_ready: Function to get the IRQ used for data ready signal.
+ * @tf: Transfer function structure used by I/O operations.
+ * @tb: Transfer buffers and mutex used by I/O operations.
+ */
+struct st_sensor_data {
+       struct device *dev;
+       struct iio_trigger *trig;
+       struct st_sensors *sensor;
+       struct st_sensor_fullscale_avl *current_fullscale;
+
+       bool enabled;
+       bool multiread_bit;
+
+       char *buffer_data;
+
+       unsigned int odr;
+
+       unsigned int (*get_irq_data_ready) (struct iio_dev *indio_dev);
+
+       const struct st_sensor_transfer_function *tf;
+       struct st_sensor_transfer_buffer tb;
+};
+
+#ifdef CONFIG_IIO_BUFFER
+int st_sensors_allocate_trigger(struct iio_dev *indio_dev,
+                               const struct iio_trigger_ops *trigger_ops);
+
+void st_sensors_deallocate_trigger(struct iio_dev *indio_dev);
+
+irqreturn_t st_sensors_trigger_handler(int irq, void *p);
+
+int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf);
+#endif
+
+int st_sensors_init_sensor(struct iio_dev *indio_dev);
+
+int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable);
+
+int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable);
+
+int st_sensors_get_sampling_frequency_avl(struct iio_dev *indio_dev, char *buf);
+
+int st_sensors_get_scale_avl(struct iio_dev *indio_dev, char *buf);
+
+int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr);
+
+int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable);
+
+int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale);
+
+int st_sensors_read_info_raw(struct iio_dev *indio_dev,
+                               struct iio_chan_spec const *ch, int *val);
+
+int st_sensors_check_device_support(struct iio_dev *indio_dev,
+                       int num_sensors_list, const struct st_sensors *sensors);
+
+ssize_t st_sensors_sysfs_get_sampling_frequency(struct device *dev,
+                               struct device_attribute *attr, char *buf);
+
+ssize_t st_sensors_sysfs_set_sampling_frequency(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t size);
+
+ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev,
+                               struct device_attribute *attr, char *buf);
+
+ssize_t st_sensors_sysfs_scale_avail(struct device *dev,
+                               struct device_attribute *attr, char *buf);
+
+#endif /* ST_SENSORS_H */
diff --git a/include/linux/iio/common/st_sensors_i2c.h b/include/linux/iio/common/st_sensors_i2c.h
new file mode 100644 (file)
index 0000000..67d8453
--- /dev/null
@@ -0,0 +1,20 @@
+/*
+ * STMicroelectronics sensors i2c library driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_SENSORS_I2C_H
+#define ST_SENSORS_I2C_H
+
+#include <linux/i2c.h>
+#include <linux/iio/common/st_sensors.h>
+
+void st_sensors_i2c_configure(struct iio_dev *indio_dev,
+               struct i2c_client *client, struct st_sensor_data *sdata);
+
+#endif /* ST_SENSORS_I2C_H */
diff --git a/include/linux/iio/common/st_sensors_spi.h b/include/linux/iio/common/st_sensors_spi.h
new file mode 100644 (file)
index 0000000..d964a35
--- /dev/null
@@ -0,0 +1,20 @@
+/*
+ * STMicroelectronics sensors spi library driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_SENSORS_SPI_H
+#define ST_SENSORS_SPI_H
+
+#include <linux/spi/spi.h>
+#include <linux/iio/common/st_sensors.h>
+
+void st_sensors_spi_configure(struct iio_dev *indio_dev,
+                       struct spi_device *spi, struct st_sensor_data *sdata);
+
+#endif /* ST_SENSORS_SPI_H */