// SPDX-License-Identifier: GPL-2.0+ /* * mcp9600.c - Support for Microchip MCP9600 thermocouple EMF converter * * Copyright (c) 2022 Andrew Hepp * Author: <[email protected]> */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/bits.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/math.h> #include <linux/minmax.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/iio/events.h> #include <linux/iio/iio.h> /* MCP9600 registers */ #define MCP9600_HOT_JUNCTION … #define MCP9600_COLD_JUNCTION … #define MCP9600_STATUS … #define MCP9600_STATUS_ALERT(x) … #define MCP9600_ALERT_CFG1 … #define MCP9600_ALERT_CFG(x) … #define MCP9600_ALERT_CFG_ENABLE … #define MCP9600_ALERT_CFG_ACTIVE_HIGH … #define MCP9600_ALERT_CFG_FALLING … #define MCP9600_ALERT_CFG_COLD_JUNCTION … #define MCP9600_ALERT_HYSTERESIS1 … #define MCP9600_ALERT_HYSTERESIS(x) … #define MCP9600_ALERT_LIMIT1 … #define MCP9600_ALERT_LIMIT(x) … #define MCP9600_ALERT_LIMIT_MASK … #define MCP9600_DEVICE_ID … /* MCP9600 device id value */ #define MCP9600_DEVICE_ID_MCP9600 … #define MCP9600_ALERT_COUNT … #define MCP9600_MIN_TEMP_HOT_JUNCTION_MICRO … #define MCP9600_MAX_TEMP_HOT_JUNCTION_MICRO … #define MCP9600_MIN_TEMP_COLD_JUNCTION_MICRO … #define MCP9600_MAX_TEMP_COLD_JUNCTION_MICRO … enum mcp9600_alert { … }; static const char * const mcp9600_alert_name[MCP9600_ALERT_COUNT] = …; static const struct iio_event_spec mcp9600_events[] = …; #define MCP9600_CHANNELS(hj_num_ev, hj_ev_spec_off, cj_num_ev, cj_ev_spec_off) … static const struct iio_chan_spec mcp9600_channels[][2] = …; struct mcp9600_data { … }; static int mcp9600_read(struct mcp9600_data *data, struct iio_chan_spec const *chan, int *val) { … } static int mcp9600_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int mcp9600_get_alert_index(int channel2, enum iio_event_direction dir) { … } static int mcp9600_read_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir) { … } static int mcp9600_write_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, int state) { … } static int mcp9600_read_thresh(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 mcp9600_write_thresh(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 const struct iio_info mcp9600_info = …; static irqreturn_t mcp9600_alert_handler(void *private, enum mcp9600_alert alert, enum iio_modifier mod, enum iio_event_direction dir) { … } static irqreturn_t mcp9600_alert1_handler(int irq, void *private) { … } static irqreturn_t mcp9600_alert2_handler(int irq, void *private) { … } static irqreturn_t mcp9600_alert3_handler(int irq, void *private) { … } static irqreturn_t mcp9600_alert4_handler(int irq, void *private) { … } static irqreturn_t (*mcp9600_alert_handler_func[MCP9600_ALERT_COUNT]) (int, void *) = …; static int mcp9600_probe_alerts(struct iio_dev *indio_dev) { … } static int mcp9600_probe(struct i2c_client *client) { … } static const struct i2c_device_id mcp9600_id[] = …; MODULE_DEVICE_TABLE(i2c, mcp9600_id); static const struct of_device_id mcp9600_of_match[] = …; MODULE_DEVICE_TABLE(of, mcp9600_of_match); static struct i2c_driver mcp9600_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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