// SPDX-License-Identifier: GPL-2.0 /* * Copyright 2018 Google LLC. * * Driver for Semtech's SX9310/SX9311 capacitive proximity/button solution. * Based on SX9500 driver and Semtech driver using the input framework * <https://my.syncplicity.com/share/teouwsim8niiaud/ * linux-driver-SX9310_NoSmartHSensing>. * Reworked in April 2019 by Evan Green <[email protected]> * and in January 2020 by Daniel Campello <[email protected]>. */ #include <linux/bitfield.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/log2.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/pm.h> #include <linux/property.h> #include <linux/regmap.h> #include <linux/iio/iio.h> #include "sx_common.h" /* Register definitions. */ #define SX9310_REG_IRQ_SRC … #define SX9310_REG_STAT0 … #define SX9310_REG_STAT1 … #define SX9310_REG_STAT1_COMPSTAT_MASK … #define SX9310_REG_IRQ_MSK … #define SX9310_CONVDONE_IRQ … #define SX9310_FAR_IRQ … #define SX9310_CLOSE_IRQ … #define SX9310_REG_IRQ_FUNC … #define SX9310_REG_PROX_CTRL0 … #define SX9310_REG_PROX_CTRL0_SENSOREN_MASK … #define SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK … #define SX9310_REG_PROX_CTRL0_SCANPERIOD_15MS … #define SX9310_REG_PROX_CTRL1 … #define SX9310_REG_PROX_CTRL2 … #define SX9310_REG_PROX_CTRL2_COMBMODE_MASK … #define SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1_CS2_CS3 … #define SX9310_REG_PROX_CTRL2_COMBMODE_CS1_CS2 … #define SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1 … #define SX9310_REG_PROX_CTRL2_COMBMODE_CS3 … #define SX9310_REG_PROX_CTRL2_SHIELDEN_MASK … #define SX9310_REG_PROX_CTRL2_SHIELDEN_DYNAMIC … #define SX9310_REG_PROX_CTRL2_SHIELDEN_GROUND … #define SX9310_REG_PROX_CTRL3 … #define SX9310_REG_PROX_CTRL3_GAIN0_MASK … #define SX9310_REG_PROX_CTRL3_GAIN0_X8 … #define SX9310_REG_PROX_CTRL3_GAIN12_MASK … #define SX9310_REG_PROX_CTRL3_GAIN12_X4 … #define SX9310_REG_PROX_CTRL4 … #define SX9310_REG_PROX_CTRL4_RESOLUTION_MASK … #define SX9310_REG_PROX_CTRL4_RESOLUTION_FINEST … #define SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_FINE … #define SX9310_REG_PROX_CTRL4_RESOLUTION_FINE … #define SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM … #define SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM_COARSE … #define SX9310_REG_PROX_CTRL4_RESOLUTION_COARSE … #define SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_COARSE … #define SX9310_REG_PROX_CTRL4_RESOLUTION_COARSEST … #define SX9310_REG_PROX_CTRL5 … #define SX9310_REG_PROX_CTRL5_RANGE_SMALL … #define SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK … #define SX9310_REG_PROX_CTRL5_STARTUPSENS_CS1 … #define SX9310_REG_PROX_CTRL5_RAWFILT_MASK … #define SX9310_REG_PROX_CTRL5_RAWFILT_SHIFT … #define SX9310_REG_PROX_CTRL5_RAWFILT_1P25 … #define SX9310_REG_PROX_CTRL6 … #define SX9310_REG_PROX_CTRL6_AVGTHRESH_DEFAULT … #define SX9310_REG_PROX_CTRL7 … #define SX9310_REG_PROX_CTRL7_AVGNEGFILT_2 … #define SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK … #define SX9310_REG_PROX_CTRL7_AVGPOSFILT_SHIFT … #define SX9310_REG_PROX_CTRL7_AVGPOSFILT_512 … #define SX9310_REG_PROX_CTRL8 … #define SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK … #define SX9310_REG_PROX_CTRL9 … #define SX9310_REG_PROX_CTRL8_9_PTHRESH_28 … #define SX9310_REG_PROX_CTRL8_9_PTHRESH_96 … #define SX9310_REG_PROX_CTRL8_9_BODYTHRESH_900 … #define SX9310_REG_PROX_CTRL8_9_BODYTHRESH_1500 … #define SX9310_REG_PROX_CTRL10 … #define SX9310_REG_PROX_CTRL10_HYST_MASK … #define SX9310_REG_PROX_CTRL10_HYST_6PCT … #define SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK … #define SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK … #define SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_2 … #define SX9310_REG_PROX_CTRL11 … #define SX9310_REG_PROX_CTRL12 … #define SX9310_REG_PROX_CTRL13 … #define SX9310_REG_PROX_CTRL14 … #define SX9310_REG_PROX_CTRL15 … #define SX9310_REG_PROX_CTRL16 … #define SX9310_REG_PROX_CTRL17 … #define SX9310_REG_PROX_CTRL18 … #define SX9310_REG_PROX_CTRL19 … #define SX9310_REG_SAR_CTRL0 … #define SX9310_REG_SAR_CTRL0_SARDEB_4_SAMPLES … #define SX9310_REG_SAR_CTRL0_SARHYST_8 … #define SX9310_REG_SAR_CTRL1 … /* Each increment of the slope register is 0.0078125. */ #define SX9310_REG_SAR_CTRL1_SLOPE(_hnslope) … #define SX9310_REG_SAR_CTRL2 … #define SX9310_REG_SAR_CTRL2_SAROFFSET_DEFAULT … #define SX9310_REG_SENSOR_SEL … #define SX9310_REG_USE_MSB … #define SX9310_REG_USE_LSB … #define SX9310_REG_AVG_MSB … #define SX9310_REG_AVG_LSB … #define SX9310_REG_DIFF_MSB … #define SX9310_REG_DIFF_LSB … #define SX9310_REG_OFFSET_MSB … #define SX9310_REG_OFFSET_LSB … #define SX9310_REG_SAR_MSB … #define SX9310_REG_SAR_LSB … #define SX9310_REG_I2C_ADDR … #define SX9310_REG_PAUSE … #define SX9310_REG_WHOAMI … #define SX9310_WHOAMI_VALUE … #define SX9311_WHOAMI_VALUE … #define SX9310_REG_RESET … /* 4 hardware channels, as defined in STAT0: COMB, CS2, CS1 and CS0. */ #define SX9310_NUM_CHANNELS … static_assert(…); #define SX9310_NAMED_CHANNEL(idx, name) … #define SX9310_CHANNEL(idx) … struct sx931x_info { … }; static const struct iio_chan_spec sx9310_channels[] = …; /* * Each entry contains the integer part (val) and the fractional part, in micro * seconds. It conforms to the IIO output IIO_VAL_INT_PLUS_MICRO. */ static const struct { … } sx9310_samp_freq_table[] = …; static const unsigned int sx9310_scan_period_table[] = …; static const struct regmap_range sx9310_writable_reg_ranges[] = …; static const struct regmap_access_table sx9310_writeable_regs = …; static const struct regmap_range sx9310_readable_reg_ranges[] = …; static const struct regmap_access_table sx9310_readable_regs = …; static const struct regmap_range sx9310_volatile_reg_ranges[] = …; static const struct regmap_access_table sx9310_volatile_regs = …; static const struct regmap_config sx9310_regmap_config = …; static int sx9310_read_prox_data(struct sx_common_data *data, const struct iio_chan_spec *chan, __be16 *val) { … } /* * If we have no interrupt support, we have to wait for a scan period * after enabling a channel to get a result. */ static int sx9310_wait_for_sample(struct sx_common_data *data) { … } static int sx9310_read_gain(struct sx_common_data *data, const struct iio_chan_spec *chan, int *val) { … } static int sx9310_read_samp_freq(struct sx_common_data *data, int *val, int *val2) { … } static int sx9310_read_raw(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, int *val, int *val2, long mask) { … } static const int sx9310_gain_vals[] = …; static int sx9310_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { … } static const unsigned int sx9310_pthresh_codes[] = …; static int sx9310_get_thresh_reg(unsigned int channel) { … } static int sx9310_read_thresh(struct sx_common_data *data, const struct iio_chan_spec *chan, int *val) { … } static int sx9310_read_hysteresis(struct sx_common_data *data, const struct iio_chan_spec *chan, int *val) { … } static int sx9310_read_far_debounce(struct sx_common_data *data, int *val) { … } static int sx9310_read_close_debounce(struct sx_common_data *data, int *val) { … } static int sx9310_read_event_val(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int *val, int *val2) { … } static int sx9310_write_thresh(struct sx_common_data *data, const struct iio_chan_spec *chan, int val) { … } static int sx9310_write_hysteresis(struct sx_common_data *data, const struct iio_chan_spec *chan, int _val) { … } static int sx9310_write_far_debounce(struct sx_common_data *data, int val) { … } static int sx9310_write_close_debounce(struct sx_common_data *data, int val) { … } static int sx9310_write_event_val(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int val, int val2) { … } static int sx9310_set_samp_freq(struct sx_common_data *data, int val, int val2) { … } static int sx9310_write_gain(struct sx_common_data *data, const struct iio_chan_spec *chan, int val) { … } static int sx9310_write_raw(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, int val, int val2, long mask) { … } static const struct sx_common_reg_default sx9310_default_regs[] = …; /* Activate all channels and perform an initial compensation. */ static int sx9310_init_compensation(struct iio_dev *indio_dev) { … } static const struct sx_common_reg_default * sx9310_get_default_reg(struct device *dev, int idx, struct sx_common_reg_default *reg_def) { … } static int sx9310_check_whoami(struct device *dev, struct iio_dev *indio_dev) { … } static const struct sx_common_chip_info sx9310_chip_info = …; static int sx9310_probe(struct i2c_client *client) { … } static int sx9310_suspend(struct device *dev) { … } static int sx9310_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(sx9310_pm_ops, sx9310_suspend, sx9310_resume); static const struct sx931x_info sx9310_info = …; static const struct sx931x_info sx9311_info = …; static const struct acpi_device_id sx9310_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, sx9310_acpi_match); static const struct of_device_id sx9310_of_match[] = …; MODULE_DEVICE_TABLE(of, sx9310_of_match); static const struct i2c_device_id sx9310_id[] = …; MODULE_DEVICE_TABLE(i2c, sx9310_id); static struct i2c_driver sx9310_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_IMPORT_NS(…);
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