// SPDX-License-Identifier: GPL-2.0-only /* * Sensortek STK8312 3-Axis Accelerometer * * Copyright (c) 2015, Intel Corporation. * * IIO driver for STK8312; 7-bit I2C address: 0x3D. */ #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/delay.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 STK8312_REG_XOUT … #define STK8312_REG_YOUT … #define STK8312_REG_ZOUT … #define STK8312_REG_INTSU … #define STK8312_REG_MODE … #define STK8312_REG_SR … #define STK8312_REG_STH … #define STK8312_REG_RESET … #define STK8312_REG_AFECTRL … #define STK8312_REG_OTPADDR … #define STK8312_REG_OTPDATA … #define STK8312_REG_OTPCTRL … #define STK8312_MODE_ACTIVE … #define STK8312_MODE_STANDBY … #define STK8312_MODE_INT_AH_PP … #define STK8312_DREADY_BIT … #define STK8312_RNG_6G … #define STK8312_RNG_SHIFT … #define STK8312_RNG_MASK … #define STK8312_SR_MASK … #define STK8312_SR_400HZ_IDX … #define STK8312_ALL_CHANNEL_MASK … #define STK8312_ALL_CHANNEL_SIZE … #define STK8312_DRIVER_NAME … #define STK8312_IRQ_NAME … /* * The accelerometer has two measurement ranges: * * -6g - +6g (8-bit, signed) * -16g - +16g (8-bit, signed) * * scale1 = (6 + 6) * 9.81 / (2^8 - 1) = 0.4616 * scale2 = (16 + 16) * 9.81 / (2^8 - 1) = 1.2311 */ #define STK8312_SCALE_AVAIL … static const int stk8312_scale_table[][2] = …; static const struct { … } stk8312_samp_freq_table[] = …; #define STK8312_ACCEL_CHANNEL(index, reg, axis) … static const struct iio_chan_spec stk8312_channels[] = …; struct stk8312_data { … }; static IIO_CONST_ATTR(in_accel_scale_available, STK8312_SCALE_AVAIL); static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("3.125 6.25 12.5 25 50 100 200 400"); static struct attribute *stk8312_attributes[] = …; static const struct attribute_group stk8312_attribute_group = …; static int stk8312_otp_init(struct stk8312_data *data) { … } static int stk8312_set_mode(struct stk8312_data *data, u8 mode) { … } static int stk8312_set_interrupts(struct stk8312_data *data, u8 int_mask) { … } static int stk8312_data_rdy_trigger_set_state(struct iio_trigger *trig, bool state) { … } static const struct iio_trigger_ops stk8312_trigger_ops = …; static int stk8312_set_sample_rate(struct stk8312_data *data, u8 rate) { … } static int stk8312_set_range(struct stk8312_data *data, u8 range) { … } static int stk8312_read_accel(struct stk8312_data *data, u8 address) { … } static int stk8312_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int stk8312_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static const struct iio_info stk8312_info = …; static irqreturn_t stk8312_trigger_handler(int irq, void *p) { … } static irqreturn_t stk8312_data_rdy_trig_poll(int irq, void *private) { … } static int stk8312_buffer_preenable(struct iio_dev *indio_dev) { … } static int stk8312_buffer_postdisable(struct iio_dev *indio_dev) { … } static const struct iio_buffer_setup_ops stk8312_buffer_setup_ops = …; static int stk8312_probe(struct i2c_client *client) { … } static void stk8312_remove(struct i2c_client *client) { … } static int stk8312_suspend(struct device *dev) { … } static int stk8312_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(stk8312_pm_ops, stk8312_suspend, stk8312_resume); static const struct i2c_device_id stk8312_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, stk8312_i2c_id); static struct i2c_driver stk8312_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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