// SPDX-License-Identifier: GPL-2.0+ /* * AD717x and AD411x family SPI ADC driver * * Supported devices: * AD4111/AD4112/AD4114/AD4115/AD4116 * AD7172-2/AD7172-4/AD7173-8/AD7175-2 * AD7175-8/AD7176-2/AD7177-2 * * Copyright (C) 2015, 2024 Analog Devices, Inc. */ #include <linux/array_size.h> #include <linux/bitfield.h> #include <linux/bitmap.h> #include <linux/container_of.h> #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/err.h> #include <linux/gpio/driver.h> #include <linux/gpio/regmap.h> #include <linux/idr.h> #include <linux/interrupt.h> #include <linux/math64.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/property.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/types.h> #include <linux/units.h> #include <linux/iio/buffer.h> #include <linux/iio/iio.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include <linux/iio/adc/ad_sigma_delta.h> #define AD7173_REG_COMMS … #define AD7173_REG_ADC_MODE … #define AD7173_REG_INTERFACE_MODE … #define AD7173_REG_CRC … #define AD7173_REG_DATA … #define AD7173_REG_GPIO … #define AD7173_REG_ID … #define AD7173_REG_CH(x) … #define AD7173_REG_SETUP(x) … #define AD7173_REG_FILTER(x) … #define AD7173_REG_OFFSET(x) … #define AD7173_REG_GAIN(x) … #define AD7173_RESET_LENGTH … #define AD7173_CH_ENABLE … #define AD7173_CH_SETUP_SEL_MASK … #define AD7173_CH_SETUP_AINPOS_MASK … #define AD7173_CH_SETUP_AINNEG_MASK … #define AD7173_NO_AINS_PER_CHANNEL … #define AD7173_CH_ADDRESS(pos, neg) … #define AD7173_AIN_TEMP_POS … #define AD7173_AIN_TEMP_NEG … #define AD7173_AIN_POW_MON_POS … #define AD7173_AIN_POW_MON_NEG … #define AD7173_AIN_REF_POS … #define AD7173_AIN_REF_NEG … #define AD7173_IS_REF_INPUT(x) … #define AD7172_2_ID … #define AD7175_ID … #define AD7176_ID … #define AD7175_2_ID … #define AD7172_4_ID … #define AD7173_ID … #define AD4111_ID … #define AD4112_ID … #define AD4114_ID … #define AD4116_ID … #define AD4115_ID … #define AD7175_8_ID … #define AD7177_ID … #define AD7173_ID_MASK … #define AD7173_ADC_MODE_REF_EN … #define AD7173_ADC_MODE_SING_CYC … #define AD7173_ADC_MODE_MODE_MASK … #define AD7173_ADC_MODE_CLOCKSEL_MASK … #define AD7173_ADC_MODE_CLOCKSEL_INT … #define AD7173_ADC_MODE_CLOCKSEL_INT_OUTPUT … #define AD7173_ADC_MODE_CLOCKSEL_EXT … #define AD7173_ADC_MODE_CLOCKSEL_XTAL … #define AD7173_GPIO_PDSW … #define AD7173_GPIO_OP_EN2_3 … #define AD7173_GPIO_MUX_IO … #define AD7173_GPIO_SYNC_EN … #define AD7173_GPIO_ERR_EN … #define AD7173_GPIO_ERR_DAT … #define AD7173_GPIO_GP_DATA3 … #define AD7173_GPIO_GP_DATA2 … #define AD7173_GPIO_IP_EN1 … #define AD7173_GPIO_IP_EN0 … #define AD7173_GPIO_OP_EN1 … #define AD7173_GPIO_OP_EN0 … #define AD7173_GPIO_GP_DATA1 … #define AD7173_GPIO_GP_DATA0 … #define AD7173_GPO12_DATA(x) … #define AD7173_GPO23_DATA(x) … #define AD4111_GPO01_DATA(x) … #define AD7173_GPO_DATA(x) … #define AD7173_INTERFACE_DATA_STAT … #define AD7173_INTERFACE_DATA_STAT_EN(x) … #define AD7173_SETUP_BIPOLAR … #define AD7173_SETUP_AREF_BUF_MASK … #define AD7173_SETUP_AIN_BUF_MASK … #define AD7173_SETUP_REF_SEL_MASK … #define AD7173_SETUP_REF_SEL_AVDD1_AVSS … #define AD7173_SETUP_REF_SEL_INT_REF … #define AD7173_SETUP_REF_SEL_EXT_REF2 … #define AD7173_SETUP_REF_SEL_EXT_REF … #define AD7173_VOLTAGE_INT_REF_uV … #define AD7173_TEMP_SENSIIVITY_uV_per_C … #define AD7177_ODR_START_VALUE … #define AD4111_SHUNT_RESISTOR_OHM … #define AD4111_DIVIDER_RATIO … #define AD4111_CURRENT_CHAN_CUTOFF … #define AD4111_VINCOM_INPUT … /* pin < num_voltage_in is a normal voltage input */ /* pin >= num_voltage_in_div is a voltage input without a divider */ #define AD4111_IS_VINCOM_MISMATCH(pin1, pin2) … #define AD7173_FILTER_ODR0_MASK … #define AD7173_MAX_CONFIGS … struct ad7173_device_info { … }; struct ad7173_channel_config { … }; struct ad7173_channel { … }; struct ad7173_state { … }; static unsigned int ad4115_sinc5_data_rates[] = …; static unsigned int ad4116_sinc5_data_rates[] = …; static const unsigned int ad7173_sinc5_data_rates[] = …; static const unsigned int ad7175_sinc5_data_rates[] = …; static unsigned int ad4111_current_channel_config[] = …; static const struct ad7173_device_info ad4111_device_info = …; static const struct ad7173_device_info ad4112_device_info = …; static const struct ad7173_device_info ad4114_device_info = …; static const struct ad7173_device_info ad4115_device_info = …; static const struct ad7173_device_info ad4116_device_info = …; static const struct ad7173_device_info ad7172_2_device_info = …; static const struct ad7173_device_info ad7172_4_device_info = …; static const struct ad7173_device_info ad7173_8_device_info = …; static const struct ad7173_device_info ad7175_2_device_info = …; static const struct ad7173_device_info ad7175_8_device_info = …; static const struct ad7173_device_info ad7176_2_device_info = …; static const struct ad7173_device_info ad7177_2_device_info = …; static const char *const ad7173_ref_sel_str[] = …; static const char *const ad7173_clk_sel[] = …; #if IS_ENABLED(CONFIG_GPIOLIB) static const struct regmap_range ad7173_range_gpio[] = …; static const struct regmap_access_table ad7173_access_table = …; static const struct regmap_config ad7173_regmap_config = …; static int ad7173_mask_xlate(struct gpio_regmap *gpio, unsigned int base, unsigned int offset, unsigned int *reg, unsigned int *mask) { … } static int ad4111_mask_xlate(struct gpio_regmap *gpio, unsigned int base, unsigned int offset, unsigned int *reg, unsigned int *mask) { … } static void ad7173_gpio_disable(void *data) { … } static int ad7173_gpio_init(struct ad7173_state *st) { … } #else static int ad7173_gpio_init(struct ad7173_state *st) { return 0; } #endif /* CONFIG_GPIOLIB */ static struct ad7173_state *ad_sigma_delta_to_ad7173(struct ad_sigma_delta *sd) { … } static struct ad7173_state *clk_hw_to_ad7173(struct clk_hw *hw) { … } static void ad7173_ida_destroy(void *data) { … } static void ad7173_reset_usage_cnts(struct ad7173_state *st) { … } static struct ad7173_channel_config * ad7173_find_live_config(struct ad7173_state *st, struct ad7173_channel_config *cfg) { … } /* Could be replaced with a generic LRU implementation */ static int ad7173_free_config_slot_lru(struct ad7173_state *st) { … } /* Could be replaced with a generic LRU implementation */ static int ad7173_load_config(struct ad7173_state *st, struct ad7173_channel_config *cfg) { … } static int ad7173_config_channel(struct ad7173_state *st, int addr) { … } static int ad7173_set_channel(struct ad_sigma_delta *sd, unsigned int channel) { … } static int ad7173_set_mode(struct ad_sigma_delta *sd, enum ad_sigma_delta_mode mode) { … } static int ad7173_append_status(struct ad_sigma_delta *sd, bool append) { … } static int ad7173_disable_all(struct ad_sigma_delta *sd) { … } static int ad7173_disable_one(struct ad_sigma_delta *sd, unsigned int chan) { … } static struct ad_sigma_delta_info ad7173_sigma_delta_info = …; static int ad7173_setup(struct iio_dev *indio_dev) { … } static unsigned int ad7173_get_ref_voltage_milli(struct ad7173_state *st, u8 reference_select) { … } static int ad7173_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long info) { … } static int ad7173_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long info) { … } static int ad7173_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { … } static int ad7173_debug_reg_access(struct iio_dev *indio_dev, unsigned int reg, unsigned int writeval, unsigned int *readval) { … } static const struct iio_info ad7173_info = …; static const struct iio_chan_spec ad7173_channel_template = …; static const struct iio_chan_spec ad7173_temp_iio_channel_template = …; static void ad7173_disable_regulators(void *data) { … } static void ad7173_clk_disable_unprepare(void *clk) { … } static unsigned long ad7173_sel_clk(struct ad7173_state *st, unsigned int clk_sel) { … } static unsigned long ad7173_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { … } static int ad7173_clk_output_is_enabled(struct clk_hw *hw) { … } static int ad7173_clk_output_prepare(struct clk_hw *hw) { … } static void ad7173_clk_output_unprepare(struct clk_hw *hw) { … } static const struct clk_ops ad7173_int_clk_ops = …; static int ad7173_register_clk_provider(struct iio_dev *indio_dev) { … } static int ad4111_validate_current_ain(struct ad7173_state *st, const unsigned int ain[AD7173_NO_AINS_PER_CHANNEL]) { … } static int ad7173_validate_voltage_ain_inputs(struct ad7173_state *st, unsigned int ain0, unsigned int ain1) { … } static int ad7173_validate_reference(struct ad7173_state *st, int ref_sel) { … } static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev) { … } static int ad7173_fw_parse_device_config(struct iio_dev *indio_dev) { … } static int ad7173_probe(struct spi_device *spi) { … } static const struct of_device_id ad7173_of_match[] = …; MODULE_DEVICE_TABLE(of, ad7173_of_match); static const struct spi_device_id ad7173_id_table[] = …; MODULE_DEVICE_TABLE(spi, ad7173_id_table); static struct spi_driver ad7173_driver = …; module_spi_driver(…) …; MODULE_IMPORT_NS(…); MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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