// SPDX-License-Identifier: GPL-2.0-only /* * Sensortek STK8BA50 3-Axis Accelerometer * * Copyright (c) 2015, Intel Corporation. * * STK8BA50 7-bit I2C address: 0x18. */ #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/iio/buffer.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger.h> #include <linux/iio/triggered_buffer.h> #include <linux/iio/trigger_consumer.h> #define STK8BA50_REG_XOUT … #define STK8BA50_REG_YOUT … #define STK8BA50_REG_ZOUT … #define STK8BA50_REG_RANGE … #define STK8BA50_REG_BWSEL … #define STK8BA50_REG_POWMODE … #define STK8BA50_REG_SWRST … #define STK8BA50_REG_INTEN2 … #define STK8BA50_REG_INTMAP2 … #define STK8BA50_MODE_NORMAL … #define STK8BA50_MODE_SUSPEND … #define STK8BA50_MODE_POWERBIT … #define STK8BA50_DATA_SHIFT … #define STK8BA50_RESET_CMD … #define STK8BA50_SR_1792HZ_IDX … #define STK8BA50_DREADY_INT_MASK … #define STK8BA50_DREADY_INT_MAP … #define STK8BA50_ALL_CHANNEL_MASK … #define STK8BA50_ALL_CHANNEL_SIZE … #define STK8BA50_DRIVER_NAME … #define STK8BA50_IRQ_NAME … #define STK8BA50_SCALE_AVAIL … /* * The accelerometer has four measurement ranges: * +/-2g; +/-4g; +/-8g; +/-16g * * Acceleration values are 10-bit, 2's complement. * Scales are calculated as following: * * scale1 = (2 + 2) * 9.81 / (2^10 - 1) = 0.0384 * scale2 = (4 + 4) * 9.81 / (2^10 - 1) = 0.0767 * etc. * * Scales are stored in this format: * { <register value>, <scale value> } * * Locally, the range is stored as a table index. */ static const struct { … } stk8ba50_scale_table[] = …; /* Sample rates are stored as { <register value>, <Hz value> } */ static const struct { … } stk8ba50_samp_freq_table[] = …; /* Used to map scan mask bits to their corresponding channel register. */ static const int stk8ba50_channel_table[] = …; struct stk8ba50_data { … }; #define STK8BA50_ACCEL_CHANNEL(index, reg, axis) … static const struct iio_chan_spec stk8ba50_channels[] = …; static IIO_CONST_ATTR(in_accel_scale_available, STK8BA50_SCALE_AVAIL); static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("14 25 56 112 224 448 896 1792"); static struct attribute *stk8ba50_attributes[] = …; static const struct attribute_group stk8ba50_attribute_group = …; static int stk8ba50_read_accel(struct stk8ba50_data *data, u8 reg) { … } static int stk8ba50_data_rdy_trigger_set_state(struct iio_trigger *trig, bool state) { … } static const struct iio_trigger_ops stk8ba50_trigger_ops = …; static int stk8ba50_set_power(struct stk8ba50_data *data, bool mode) { … } static int stk8ba50_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int stk8ba50_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static const struct iio_info stk8ba50_info = …; static irqreturn_t stk8ba50_trigger_handler(int irq, void *p) { … } static irqreturn_t stk8ba50_data_rdy_trig_poll(int irq, void *private) { … } static int stk8ba50_buffer_preenable(struct iio_dev *indio_dev) { … } static int stk8ba50_buffer_postdisable(struct iio_dev *indio_dev) { … } static const struct iio_buffer_setup_ops stk8ba50_buffer_setup_ops = …; static int stk8ba50_probe(struct i2c_client *client) { … } static void stk8ba50_remove(struct i2c_client *client) { … } static int stk8ba50_suspend(struct device *dev) { … } static int stk8ba50_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(stk8ba50_pm_ops, stk8ba50_suspend, stk8ba50_resume); static const struct i2c_device_id stk8ba50_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, stk8ba50_i2c_id); static const struct acpi_device_id stk8ba50_acpi_id[] = …; MODULE_DEVICE_TABLE(acpi, stk8ba50_acpi_id); static struct i2c_driver stk8ba50_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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