// SPDX-License-Identifier: GPL-2.0 /* * Driver for Microchip MCP3911, Two-channel Analog Front End * * Copyright (C) 2018 Marcus Folkesson <[email protected]> * Copyright (C) 2018 Kent Gustavsson <[email protected]> */ #include <linux/bitfield.h> #include <linux/bits.h> #include <linux/cleanup.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/spi/spi.h> #include <linux/iio/iio.h> #include <linux/iio/buffer.h> #include <linux/iio/triggered_buffer.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/trigger.h> #include <linux/unaligned.h> #define MCP3911_REG_CHANNEL0 … #define MCP3911_REG_CHANNEL1 … #define MCP3911_REG_MOD … #define MCP3911_REG_PHASE … #define MCP3911_REG_GAIN … #define MCP3911_GAIN_MASK(ch) … #define MCP3911_GAIN_VAL(ch, val) … #define MCP3911_REG_STATUSCOM … #define MCP3911_STATUSCOM_DRHIZ … #define MCP3911_STATUSCOM_READ … #define MCP3911_STATUSCOM_CH1_24WIDTH … #define MCP3911_STATUSCOM_CH0_24WIDTH … #define MCP3911_STATUSCOM_EN_OFFCAL … #define MCP3911_STATUSCOM_EN_GAINCAL … #define MCP3911_REG_CONFIG … #define MCP3911_CONFIG_CLKEXT … #define MCP3911_CONFIG_VREFEXT … #define MCP3911_CONFIG_OSR … #define MCP3911_REG_OFFCAL_CH0 … #define MCP3911_REG_GAINCAL_CH0 … #define MCP3911_REG_OFFCAL_CH1 … #define MCP3911_REG_GAINCAL_CH1 … #define MCP3911_REG_VREFCAL … #define MCP3911_CHANNEL(ch) … #define MCP3911_OFFCAL(ch) … /* Internal voltage reference in mV */ #define MCP3911_INT_VREF_MV … #define MCP3911_REG_READ(reg, id) … #define MCP3911_REG_WRITE(reg, id) … #define MCP3911_REG_MASK … #define MCP3911_NUM_SCALES … /* Registers compatible with MCP3910 */ #define MCP3910_REG_STATUSCOM … #define MCP3910_STATUSCOM_READ … #define MCP3910_STATUSCOM_DRHIZ … #define MCP3910_REG_GAIN … #define MCP3910_REG_CONFIG0 … #define MCP3910_CONFIG0_EN_OFFCAL … #define MCP3910_CONFIG0_OSR … #define MCP3910_REG_CONFIG1 … #define MCP3910_CONFIG1_CLKEXT … #define MCP3910_CONFIG1_VREFEXT … #define MCP3910_REG_OFFCAL_CH0 … #define MCP3910_OFFCAL(ch) … /* Maximal number of channels used by the MCP39XX family */ #define MCP39XX_MAX_NUM_CHANNELS … static const int mcp3911_osr_table[] = …; static u32 mcp3911_scale_table[MCP3911_NUM_SCALES][2]; enum mcp3911_id { … }; struct mcp3911; struct mcp3911_chip_info { … }; struct mcp3911 { … }; static int mcp3911_read(struct mcp3911 *adc, u8 reg, u32 *val, u8 len) { … } static int mcp3911_write(struct mcp3911 *adc, u8 reg, u32 val, u8 len) { … } static int mcp3911_update(struct mcp3911 *adc, u8 reg, u32 mask, u32 val, u8 len) { … } static int mcp3910_enable_offset(struct mcp3911 *adc, bool enable) { … } static int mcp3910_get_offset(struct mcp3911 *adc, int channel, int *val) { … } static int mcp3910_set_offset(struct mcp3911 *adc, int channel, int val) { … } static int mcp3911_enable_offset(struct mcp3911 *adc, bool enable) { … } static int mcp3911_get_offset(struct mcp3911 *adc, int channel, int *val) { … } static int mcp3911_set_offset(struct mcp3911 *adc, int channel, int val) { … } static int mcp3910_get_osr(struct mcp3911 *adc, u32 *val) { … } static int mcp3910_set_osr(struct mcp3911 *adc, u32 val) { … } static int mcp3911_set_osr(struct mcp3911 *adc, u32 val) { … } static int mcp3911_get_osr(struct mcp3911 *adc, u32 *val) { … } static int mcp3910_set_scale(struct mcp3911 *adc, int channel, u32 val) { … } static int mcp3911_set_scale(struct mcp3911 *adc, int channel, u32 val) { … } static int mcp3911_write_raw_get_fmt(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, long mask) { … } static int mcp3911_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long info) { … } static int mcp3911_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *channel, int *val, int *val2, long mask) { … } static int mcp3911_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *channel, int val, int val2, long mask) { … } static int mcp3911_calc_scale_table(u32 vref_mv) { … } #define MCP3911_CHAN(idx) … static const struct iio_chan_spec mcp3910_channels[] = …; static const struct iio_chan_spec mcp3911_channels[] = …; static const struct iio_chan_spec mcp3912_channels[] = …; static const struct iio_chan_spec mcp3913_channels[] = …; static const struct iio_chan_spec mcp3914_channels[] = …; static const struct iio_chan_spec mcp3918_channels[] = …; static const struct iio_chan_spec mcp3919_channels[] = …; static irqreturn_t mcp3911_trigger_handler(int irq, void *p) { … } static const struct iio_info mcp3911_info = …; static int mcp3911_config(struct mcp3911 *adc, bool external_vref) { … } static int mcp3910_config(struct mcp3911 *adc, bool external_vref) { … } static int mcp3911_set_trigger_state(struct iio_trigger *trig, bool enable) { … } static const struct iio_trigger_ops mcp3911_trigger_ops = …; static int mcp3911_probe(struct spi_device *spi) { … } static const struct mcp3911_chip_info mcp3911_chip_info[] = …; static const struct of_device_id mcp3911_dt_ids[] = …; MODULE_DEVICE_TABLE(of, mcp3911_dt_ids); static const struct spi_device_id mcp3911_id[] = …; MODULE_DEVICE_TABLE(spi, mcp3911_id); static struct spi_driver mcp3911_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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