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@@ -0,0 +1,272 @@
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+/*
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+ * STMicroelectronics pressures driver
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+ *
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+ * Copyright 2013 STMicroelectronics Inc.
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+ *
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+ * Denis Ciocca <denis.ciocca@st.com>
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+ *
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+ * Licensed under the GPL-2.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/slab.h>
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+#include <linux/errno.h>
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+#include <linux/types.h>
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+#include <linux/mutex.h>
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+#include <linux/interrupt.h>
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+#include <linux/i2c.h>
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+#include <linux/gpio.h>
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+#include <linux/irq.h>
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+#include <linux/delay.h>
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+#include <linux/iio/iio.h>
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+#include <linux/iio/sysfs.h>
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+#include <linux/iio/trigger.h>
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+#include <linux/iio/buffer.h>
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+#include <asm/unaligned.h>
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+
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+#include <linux/iio/common/st_sensors.h>
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+#include "st_pressure.h"
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+
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+#define ST_PRESS_MBAR_TO_KPASCAL(x) (x * 10)
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+#define ST_PRESS_NUMBER_DATA_CHANNELS 1
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+
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+/* DEFAULT VALUE FOR SENSORS */
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+#define ST_PRESS_DEFAULT_OUT_XL_ADDR 0x28
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+#define ST_TEMP_DEFAULT_OUT_L_ADDR 0x2b
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+
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+/* FULLSCALE */
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+#define ST_PRESS_FS_AVL_1260MB 1260
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+
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+/* CUSTOM VALUES FOR SENSOR 1 */
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+#define ST_PRESS_1_WAI_EXP 0xbb
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+#define ST_PRESS_1_ODR_ADDR 0x20
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+#define ST_PRESS_1_ODR_MASK 0x70
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+#define ST_PRESS_1_ODR_AVL_1HZ_VAL 0x01
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+#define ST_PRESS_1_ODR_AVL_7HZ_VAL 0x05
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+#define ST_PRESS_1_ODR_AVL_13HZ_VAL 0x06
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+#define ST_PRESS_1_ODR_AVL_25HZ_VAL 0x07
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+#define ST_PRESS_1_PW_ADDR 0x20
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+#define ST_PRESS_1_PW_MASK 0x80
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+#define ST_PRESS_1_FS_ADDR 0x23
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+#define ST_PRESS_1_FS_MASK 0x30
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+#define ST_PRESS_1_FS_AVL_1260_VAL 0x00
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+#define ST_PRESS_1_FS_AVL_1260_GAIN ST_PRESS_MBAR_TO_KPASCAL(244141)
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+#define ST_PRESS_1_FS_AVL_TEMP_GAIN 2083000
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+#define ST_PRESS_1_BDU_ADDR 0x20
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+#define ST_PRESS_1_BDU_MASK 0x04
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+#define ST_PRESS_1_DRDY_IRQ_ADDR 0x22
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+#define ST_PRESS_1_DRDY_IRQ_MASK 0x04
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+#define ST_PRESS_1_MULTIREAD_BIT true
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+#define ST_PRESS_1_TEMP_OFFSET 42500
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+
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+static const struct iio_chan_spec st_press_channels[] = {
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+ ST_SENSORS_LSM_CHANNELS(IIO_PRESSURE,
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+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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+ ST_SENSORS_SCAN_X, 0, IIO_NO_MOD, 'u', IIO_LE, 24, 24,
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+ ST_PRESS_DEFAULT_OUT_XL_ADDR),
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+ ST_SENSORS_LSM_CHANNELS(IIO_TEMP,
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+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) |
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+ BIT(IIO_CHAN_INFO_OFFSET),
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+ -1, 0, IIO_NO_MOD, 's', IIO_LE, 16, 16,
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+ ST_TEMP_DEFAULT_OUT_L_ADDR),
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+ IIO_CHAN_SOFT_TIMESTAMP(1)
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+};
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+
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+static const struct st_sensors st_press_sensors[] = {
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+ {
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+ .wai = ST_PRESS_1_WAI_EXP,
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+ .sensors_supported = {
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+ [0] = LPS331AP_PRESS_DEV_NAME,
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+ },
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+ .ch = (struct iio_chan_spec *)st_press_channels,
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+ .odr = {
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+ .addr = ST_PRESS_1_ODR_ADDR,
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+ .mask = ST_PRESS_1_ODR_MASK,
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+ .odr_avl = {
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+ { 1, ST_PRESS_1_ODR_AVL_1HZ_VAL, },
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+ { 7, ST_PRESS_1_ODR_AVL_7HZ_VAL, },
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+ { 13, ST_PRESS_1_ODR_AVL_13HZ_VAL, },
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+ { 25, ST_PRESS_1_ODR_AVL_25HZ_VAL, },
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+ },
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+ },
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+ .pw = {
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+ .addr = ST_PRESS_1_PW_ADDR,
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+ .mask = ST_PRESS_1_PW_MASK,
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+ .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
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+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
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+ },
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+ .fs = {
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+ .addr = ST_PRESS_1_FS_ADDR,
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+ .mask = ST_PRESS_1_FS_MASK,
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+ .fs_avl = {
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+ [0] = {
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+ .num = ST_PRESS_FS_AVL_1260MB,
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+ .value = ST_PRESS_1_FS_AVL_1260_VAL,
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+ .gain = ST_PRESS_1_FS_AVL_1260_GAIN,
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+ .gain2 = ST_PRESS_1_FS_AVL_TEMP_GAIN,
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+ },
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+ },
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+ },
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+ .bdu = {
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+ .addr = ST_PRESS_1_BDU_ADDR,
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+ .mask = ST_PRESS_1_BDU_MASK,
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+ },
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+ .drdy_irq = {
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+ .addr = ST_PRESS_1_DRDY_IRQ_ADDR,
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+ .mask = ST_PRESS_1_DRDY_IRQ_MASK,
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+ },
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+ .multi_read_bit = ST_PRESS_1_MULTIREAD_BIT,
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+ .bootime = 2,
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+ },
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+};
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+
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+static int st_press_read_raw(struct iio_dev *indio_dev,
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+ struct iio_chan_spec const *ch, int *val,
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+ int *val2, long mask)
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+{
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+ int err;
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+ struct st_sensor_data *pdata = iio_priv(indio_dev);
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+
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+ switch (mask) {
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+ case IIO_CHAN_INFO_RAW:
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+ err = st_sensors_read_info_raw(indio_dev, ch, val);
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+ if (err < 0)
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+ goto read_error;
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+
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+ return IIO_VAL_INT;
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+ case IIO_CHAN_INFO_SCALE:
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+ *val = 0;
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+
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+ switch (ch->type) {
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+ case IIO_PRESSURE:
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+ *val2 = pdata->current_fullscale->gain;
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+ break;
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+ case IIO_TEMP:
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+ *val2 = pdata->current_fullscale->gain2;
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+ break;
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+ default:
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+ err = -EINVAL;
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+ goto read_error;
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+ }
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+
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+ return IIO_VAL_INT_PLUS_NANO;
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+ case IIO_CHAN_INFO_OFFSET:
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+ switch (ch->type) {
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+ case IIO_TEMP:
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+ *val = 425;
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+ *val2 = 10;
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+ break;
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+ default:
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+ err = -EINVAL;
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+ goto read_error;
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+ }
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+
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+ return IIO_VAL_FRACTIONAL;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+read_error:
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+ return err;
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+}
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+
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+static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
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+static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
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+
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+static struct attribute *st_press_attributes[] = {
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+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
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+ &iio_dev_attr_sampling_frequency.dev_attr.attr,
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+ NULL,
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+};
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+
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+static const struct attribute_group st_press_attribute_group = {
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+ .attrs = st_press_attributes,
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+};
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+
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+static const struct iio_info press_info = {
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+ .driver_module = THIS_MODULE,
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+ .attrs = &st_press_attribute_group,
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+ .read_raw = &st_press_read_raw,
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+};
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+
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+#ifdef CONFIG_IIO_TRIGGER
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+static const struct iio_trigger_ops st_press_trigger_ops = {
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+ .owner = THIS_MODULE,
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+ .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
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+};
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+#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
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+#else
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+#define ST_PRESS_TRIGGER_OPS NULL
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+#endif
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+
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+int st_press_common_probe(struct iio_dev *indio_dev)
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+{
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+ int err;
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+ struct st_sensor_data *pdata = iio_priv(indio_dev);
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+
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+ indio_dev->modes = INDIO_DIRECT_MODE;
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+ indio_dev->info = &press_info;
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+
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+ err = st_sensors_check_device_support(indio_dev,
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+ ARRAY_SIZE(st_press_sensors), st_press_sensors);
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+ if (err < 0)
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+ goto st_press_common_probe_error;
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+
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+ pdata->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
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+ pdata->multiread_bit = pdata->sensor->multi_read_bit;
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+ indio_dev->channels = pdata->sensor->ch;
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+ indio_dev->num_channels = ARRAY_SIZE(st_press_channels);
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+
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+ pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
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+ &pdata->sensor->fs.fs_avl[0];
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+ pdata->odr = pdata->sensor->odr.odr_avl[0].hz;
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+
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+ err = st_sensors_init_sensor(indio_dev);
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+ if (err < 0)
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+ goto st_press_common_probe_error;
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+
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+ if (pdata->get_irq_data_ready(indio_dev) > 0) {
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+ err = st_press_allocate_ring(indio_dev);
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+ if (err < 0)
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+ goto st_press_common_probe_error;
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+
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+ err = st_sensors_allocate_trigger(indio_dev,
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+ ST_PRESS_TRIGGER_OPS);
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+ if (err < 0)
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+ goto st_press_probe_trigger_error;
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+ }
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+
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+ err = iio_device_register(indio_dev);
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+ if (err)
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+ goto st_press_device_register_error;
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+
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+ return err;
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+
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+st_press_device_register_error:
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+ if (pdata->get_irq_data_ready(indio_dev) > 0)
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+ st_sensors_deallocate_trigger(indio_dev);
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+st_press_probe_trigger_error:
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+ if (pdata->get_irq_data_ready(indio_dev) > 0)
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+ st_press_deallocate_ring(indio_dev);
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+st_press_common_probe_error:
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+ return err;
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+}
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+EXPORT_SYMBOL(st_press_common_probe);
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+
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+void st_press_common_remove(struct iio_dev *indio_dev)
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+{
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+ struct st_sensor_data *pdata = iio_priv(indio_dev);
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+
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+ iio_device_unregister(indio_dev);
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+ if (pdata->get_irq_data_ready(indio_dev) > 0) {
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+ st_sensors_deallocate_trigger(indio_dev);
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+ st_press_deallocate_ring(indio_dev);
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+ }
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+ iio_device_free(indio_dev);
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+}
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+EXPORT_SYMBOL(st_press_common_remove);
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+
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+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
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+MODULE_DESCRIPTION("STMicroelectronics pressures driver");
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+MODULE_LICENSE("GPL v2");
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