--- /dev/null
+/*
+ * STMicroelectronics pressures driver
+ *
+ * Copyright 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_pressure.h"
+
+int st_press_trig_set_state(struct iio_trigger *trig, bool state)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+
+ return st_sensors_set_dataready_irq(indio_dev, state);
+}
+
+static int st_press_buffer_preenable(struct iio_dev *indio_dev)
+{
+ int err;
+
+ err = st_sensors_set_enable(indio_dev, true);
+ if (err < 0)
+ goto st_press_set_enable_error;
+
+ err = iio_sw_buffer_preenable(indio_dev);
+
+st_press_set_enable_error:
+ return err;
+}
+
+static int st_press_buffer_postenable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *pdata = iio_priv(indio_dev);
+
+ pdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
+ if (pdata->buffer_data == NULL) {
+ err = -ENOMEM;
+ goto allocate_memory_error;
+ }
+
+ err = iio_triggered_buffer_postenable(indio_dev);
+ if (err < 0)
+ goto st_press_buffer_postenable_error;
+
+ return err;
+
+st_press_buffer_postenable_error:
+ kfree(pdata->buffer_data);
+allocate_memory_error:
+ return err;
+}
+
+static int st_press_buffer_predisable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *pdata = iio_priv(indio_dev);
+
+ err = iio_triggered_buffer_predisable(indio_dev);
+ if (err < 0)
+ goto st_press_buffer_predisable_error;
+
+ err = st_sensors_set_enable(indio_dev, false);
+
+st_press_buffer_predisable_error:
+ kfree(pdata->buffer_data);
+ return err;
+}
+
+static const struct iio_buffer_setup_ops st_press_buffer_setup_ops = {
+ .preenable = &st_press_buffer_preenable,
+ .postenable = &st_press_buffer_postenable,
+ .predisable = &st_press_buffer_predisable,
+};
+
+int st_press_allocate_ring(struct iio_dev *indio_dev)
+{
+ return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ &st_sensors_trigger_handler, &st_press_buffer_setup_ops);
+}
+
+void st_press_deallocate_ring(struct iio_dev *indio_dev)
+{
+ iio_triggered_buffer_cleanup(indio_dev);
+}
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics pressures buffer");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * STMicroelectronics pressures driver
+ *
+ * Copyright 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.h>
+#include <linux/iio/buffer.h>
+#include <asm/unaligned.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include "st_pressure.h"
+
+#define ST_PRESS_MBAR_TO_KPASCAL(x) (x * 10)
+#define ST_PRESS_NUMBER_DATA_CHANNELS 1
+
+/* DEFAULT VALUE FOR SENSORS */
+#define ST_PRESS_DEFAULT_OUT_XL_ADDR 0x28
+#define ST_TEMP_DEFAULT_OUT_L_ADDR 0x2b
+
+/* FULLSCALE */
+#define ST_PRESS_FS_AVL_1260MB 1260
+
+/* CUSTOM VALUES FOR SENSOR 1 */
+#define ST_PRESS_1_WAI_EXP 0xbb
+#define ST_PRESS_1_ODR_ADDR 0x20
+#define ST_PRESS_1_ODR_MASK 0x70
+#define ST_PRESS_1_ODR_AVL_1HZ_VAL 0x01
+#define ST_PRESS_1_ODR_AVL_7HZ_VAL 0x05
+#define ST_PRESS_1_ODR_AVL_13HZ_VAL 0x06
+#define ST_PRESS_1_ODR_AVL_25HZ_VAL 0x07
+#define ST_PRESS_1_PW_ADDR 0x20
+#define ST_PRESS_1_PW_MASK 0x80
+#define ST_PRESS_1_FS_ADDR 0x23
+#define ST_PRESS_1_FS_MASK 0x30
+#define ST_PRESS_1_FS_AVL_1260_VAL 0x00
+#define ST_PRESS_1_FS_AVL_1260_GAIN ST_PRESS_MBAR_TO_KPASCAL(244141)
+#define ST_PRESS_1_FS_AVL_TEMP_GAIN 2083000
+#define ST_PRESS_1_BDU_ADDR 0x20
+#define ST_PRESS_1_BDU_MASK 0x04
+#define ST_PRESS_1_DRDY_IRQ_ADDR 0x22
+#define ST_PRESS_1_DRDY_IRQ_MASK 0x04
+#define ST_PRESS_1_MULTIREAD_BIT true
+#define ST_PRESS_1_TEMP_OFFSET 42500
+
+static const struct iio_chan_spec st_press_channels[] = {
+ ST_SENSORS_LSM_CHANNELS(IIO_PRESSURE,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_X, 0, IIO_NO_MOD, 'u', IIO_LE, 24, 24,
+ ST_PRESS_DEFAULT_OUT_XL_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_TEMP,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_OFFSET),
+ -1, 0, IIO_NO_MOD, 's', IIO_LE, 16, 16,
+ ST_TEMP_DEFAULT_OUT_L_ADDR),
+ IIO_CHAN_SOFT_TIMESTAMP(1)
+};
+
+static const struct st_sensors st_press_sensors[] = {
+ {
+ .wai = ST_PRESS_1_WAI_EXP,
+ .sensors_supported = {
+ [0] = LPS331AP_PRESS_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_press_channels,
+ .odr = {
+ .addr = ST_PRESS_1_ODR_ADDR,
+ .mask = ST_PRESS_1_ODR_MASK,
+ .odr_avl = {
+ { 1, ST_PRESS_1_ODR_AVL_1HZ_VAL, },
+ { 7, ST_PRESS_1_ODR_AVL_7HZ_VAL, },
+ { 13, ST_PRESS_1_ODR_AVL_13HZ_VAL, },
+ { 25, ST_PRESS_1_ODR_AVL_25HZ_VAL, },
+ },
+ },
+ .pw = {
+ .addr = ST_PRESS_1_PW_ADDR,
+ .mask = ST_PRESS_1_PW_MASK,
+ .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .fs = {
+ .addr = ST_PRESS_1_FS_ADDR,
+ .mask = ST_PRESS_1_FS_MASK,
+ .fs_avl = {
+ [0] = {
+ .num = ST_PRESS_FS_AVL_1260MB,
+ .value = ST_PRESS_1_FS_AVL_1260_VAL,
+ .gain = ST_PRESS_1_FS_AVL_1260_GAIN,
+ .gain2 = ST_PRESS_1_FS_AVL_TEMP_GAIN,
+ },
+ },
+ },
+ .bdu = {
+ .addr = ST_PRESS_1_BDU_ADDR,
+ .mask = ST_PRESS_1_BDU_MASK,
+ },
+ .drdy_irq = {
+ .addr = ST_PRESS_1_DRDY_IRQ_ADDR,
+ .mask = ST_PRESS_1_DRDY_IRQ_MASK,
+ },
+ .multi_read_bit = ST_PRESS_1_MULTIREAD_BIT,
+ .bootime = 2,
+ },
+};
+
+static int st_press_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 *pdata = 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;
+
+ switch (ch->type) {
+ case IIO_PRESSURE:
+ *val2 = pdata->current_fullscale->gain;
+ break;
+ case IIO_TEMP:
+ *val2 = pdata->current_fullscale->gain2;
+ break;
+ default:
+ err = -EINVAL;
+ goto read_error;
+ }
+
+ return IIO_VAL_INT_PLUS_NANO;
+ case IIO_CHAN_INFO_OFFSET:
+ switch (ch->type) {
+ case IIO_TEMP:
+ *val = 425;
+ *val2 = 10;
+ break;
+ default:
+ err = -EINVAL;
+ goto read_error;
+ }
+
+ return IIO_VAL_FRACTIONAL;
+ default:
+ return -EINVAL;
+ }
+
+read_error:
+ return err;
+}
+
+static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
+static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
+
+static struct attribute *st_press_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_sampling_frequency.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_press_attribute_group = {
+ .attrs = st_press_attributes,
+};
+
+static const struct iio_info press_info = {
+ .driver_module = THIS_MODULE,
+ .attrs = &st_press_attribute_group,
+ .read_raw = &st_press_read_raw,
+};
+
+#ifdef CONFIG_IIO_TRIGGER
+static const struct iio_trigger_ops st_press_trigger_ops = {
+ .owner = THIS_MODULE,
+ .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
+};
+#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
+#else
+#define ST_PRESS_TRIGGER_OPS NULL
+#endif
+
+int st_press_common_probe(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *pdata = iio_priv(indio_dev);
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &press_info;
+
+ err = st_sensors_check_device_support(indio_dev,
+ ARRAY_SIZE(st_press_sensors), st_press_sensors);
+ if (err < 0)
+ goto st_press_common_probe_error;
+
+ pdata->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
+ pdata->multiread_bit = pdata->sensor->multi_read_bit;
+ indio_dev->channels = pdata->sensor->ch;
+ indio_dev->num_channels = ARRAY_SIZE(st_press_channels);
+
+ pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
+ &pdata->sensor->fs.fs_avl[0];
+ pdata->odr = pdata->sensor->odr.odr_avl[0].hz;
+
+ err = st_sensors_init_sensor(indio_dev);
+ if (err < 0)
+ goto st_press_common_probe_error;
+
+ if (pdata->get_irq_data_ready(indio_dev) > 0) {
+ err = st_press_allocate_ring(indio_dev);
+ if (err < 0)
+ goto st_press_common_probe_error;
+
+ err = st_sensors_allocate_trigger(indio_dev,
+ ST_PRESS_TRIGGER_OPS);
+ if (err < 0)
+ goto st_press_probe_trigger_error;
+ }
+
+ err = iio_device_register(indio_dev);
+ if (err)
+ goto st_press_device_register_error;
+
+ return err;
+
+st_press_device_register_error:
+ if (pdata->get_irq_data_ready(indio_dev) > 0)
+ st_sensors_deallocate_trigger(indio_dev);
+st_press_probe_trigger_error:
+ if (pdata->get_irq_data_ready(indio_dev) > 0)
+ st_press_deallocate_ring(indio_dev);
+st_press_common_probe_error:
+ return err;
+}
+EXPORT_SYMBOL(st_press_common_probe);
+
+void st_press_common_remove(struct iio_dev *indio_dev)
+{
+ struct st_sensor_data *pdata = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ if (pdata->get_irq_data_ready(indio_dev) > 0) {
+ st_sensors_deallocate_trigger(indio_dev);
+ st_press_deallocate_ring(indio_dev);
+ }
+ iio_device_free(indio_dev);
+}
+EXPORT_SYMBOL(st_press_common_remove);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics pressures driver");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * STMicroelectronics pressures driver
+ *
+ * Copyright 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/common/st_sensors.h>
+#include <linux/iio/common/st_sensors_i2c.h>
+#include "st_pressure.h"
+
+static int st_press_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct iio_dev *indio_dev;
+ struct st_sensor_data *pdata;
+ int err;
+
+ indio_dev = iio_device_alloc(sizeof(*pdata));
+ if (indio_dev == NULL) {
+ err = -ENOMEM;
+ goto iio_device_alloc_error;
+ }
+
+ pdata = iio_priv(indio_dev);
+ pdata->dev = &client->dev;
+
+ st_sensors_i2c_configure(indio_dev, client, pdata);
+
+ err = st_press_common_probe(indio_dev);
+ if (err < 0)
+ goto st_press_common_probe_error;
+
+ return 0;
+
+st_press_common_probe_error:
+ iio_device_free(indio_dev);
+iio_device_alloc_error:
+ return err;
+}
+
+static int st_press_i2c_remove(struct i2c_client *client)
+{
+ st_press_common_remove(i2c_get_clientdata(client));
+
+ return 0;
+}
+
+static const struct i2c_device_id st_press_id_table[] = {
+ { LPS331AP_PRESS_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, st_press_id_table);
+
+static struct i2c_driver st_press_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "st-press-i2c",
+ },
+ .probe = st_press_i2c_probe,
+ .remove = st_press_i2c_remove,
+ .id_table = st_press_id_table,
+};
+module_i2c_driver(st_press_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * STMicroelectronics pressures driver
+ *
+ * Copyright 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/common/st_sensors.h>
+#include <linux/iio/common/st_sensors_spi.h>
+#include "st_pressure.h"
+
+static int st_press_spi_probe(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev;
+ struct st_sensor_data *pdata;
+ int err;
+
+ indio_dev = iio_device_alloc(sizeof(*pdata));
+ if (indio_dev == NULL) {
+ err = -ENOMEM;
+ goto iio_device_alloc_error;
+ }
+
+ pdata = iio_priv(indio_dev);
+ pdata->dev = &spi->dev;
+
+ st_sensors_spi_configure(indio_dev, spi, pdata);
+
+ err = st_press_common_probe(indio_dev);
+ if (err < 0)
+ goto st_press_common_probe_error;
+
+ return 0;
+
+st_press_common_probe_error:
+ iio_device_free(indio_dev);
+iio_device_alloc_error:
+ return err;
+}
+
+static int st_press_spi_remove(struct spi_device *spi)
+{
+ st_press_common_remove(spi_get_drvdata(spi));
+
+ return 0;
+}
+
+static const struct spi_device_id st_press_id_table[] = {
+ { LPS331AP_PRESS_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(spi, st_press_id_table);
+
+static struct spi_driver st_press_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "st-press-spi",
+ },
+ .probe = st_press_spi_probe,
+ .remove = st_press_spi_remove,
+ .id_table = st_press_id_table,
+};
+module_spi_driver(st_press_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-rpi.git / commitdiff