// 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define AD7173_REG_COMMS 0x00 #define AD7173_REG_ADC_MODE 0x01 #define AD7173_REG_INTERFACE_MODE 0x02 #define AD7173_REG_CRC 0x03 #define AD7173_REG_DATA 0x04 #define AD7173_REG_GPIO 0x06 #define AD7173_REG_ID 0x07 #define AD7173_REG_CH(x) (0x10 + (x)) #define AD7173_REG_SETUP(x) (0x20 + (x)) #define AD7173_REG_FILTER(x) (0x28 + (x)) #define AD7173_REG_OFFSET(x) (0x30 + (x)) #define AD7173_REG_GAIN(x) (0x38 + (x)) #define AD7173_RESET_LENGTH BITS_TO_BYTES(64) #define AD7173_CH_ENABLE BIT(15) #define AD7173_CH_SETUP_SEL_MASK GENMASK(14, 12) #define AD7173_CH_SETUP_AINPOS_MASK GENMASK(9, 5) #define AD7173_CH_SETUP_AINNEG_MASK GENMASK(4, 0) #define AD7173_NO_AINS_PER_CHANNEL 2 #define AD7173_CH_ADDRESS(pos, neg) \ (FIELD_PREP(AD7173_CH_SETUP_AINPOS_MASK, pos) | \ FIELD_PREP(AD7173_CH_SETUP_AINNEG_MASK, neg)) #define AD7173_AIN_TEMP_POS 17 #define AD7173_AIN_TEMP_NEG 18 #define AD7173_AIN_POW_MON_POS 19 #define AD7173_AIN_POW_MON_NEG 20 #define AD7173_AIN_REF_POS 21 #define AD7173_AIN_REF_NEG 22 #define AD7173_IS_REF_INPUT(x) ((x) == AD7173_AIN_REF_POS || \ (x) == AD7173_AIN_REF_NEG) #define AD7172_2_ID 0x00d0 #define AD7175_ID 0x0cd0 #define AD7176_ID 0x0c90 #define AD7175_2_ID 0x0cd0 #define AD7172_4_ID 0x2050 #define AD7173_ID 0x30d0 #define AD4111_ID AD7173_ID #define AD4112_ID AD7173_ID #define AD4114_ID AD7173_ID #define AD4116_ID 0x34d0 #define AD4115_ID 0x38d0 #define AD7175_8_ID 0x3cd0 #define AD7177_ID 0x4fd0 #define AD7173_ID_MASK GENMASK(15, 4) #define AD7173_ADC_MODE_REF_EN BIT(15) #define AD7173_ADC_MODE_SING_CYC BIT(13) #define AD7173_ADC_MODE_MODE_MASK GENMASK(6, 4) #define AD7173_ADC_MODE_CLOCKSEL_MASK GENMASK(3, 2) #define AD7173_ADC_MODE_CLOCKSEL_INT 0x0 #define AD7173_ADC_MODE_CLOCKSEL_INT_OUTPUT 0x1 #define AD7173_ADC_MODE_CLOCKSEL_EXT 0x2 #define AD7173_ADC_MODE_CLOCKSEL_XTAL 0x3 #define AD7173_GPIO_PDSW BIT(14) #define AD7173_GPIO_OP_EN2_3 BIT(13) #define AD7173_GPIO_MUX_IO BIT(12) #define AD7173_GPIO_SYNC_EN BIT(11) #define AD7173_GPIO_ERR_EN BIT(10) #define AD7173_GPIO_ERR_DAT BIT(9) #define AD7173_GPIO_GP_DATA3 BIT(7) #define AD7173_GPIO_GP_DATA2 BIT(6) #define AD7173_GPIO_IP_EN1 BIT(5) #define AD7173_GPIO_IP_EN0 BIT(4) #define AD7173_GPIO_OP_EN1 BIT(3) #define AD7173_GPIO_OP_EN0 BIT(2) #define AD7173_GPIO_GP_DATA1 BIT(1) #define AD7173_GPIO_GP_DATA0 BIT(0) #define AD7173_GPO12_DATA(x) BIT((x) + 0) #define AD7173_GPO23_DATA(x) BIT((x) + 4) #define AD4111_GPO01_DATA(x) BIT((x) + 6) #define AD7173_GPO_DATA(x) ((x) < 2 ? AD7173_GPO12_DATA(x) : AD7173_GPO23_DATA(x)) #define AD7173_INTERFACE_DATA_STAT BIT(6) #define AD7173_INTERFACE_DATA_STAT_EN(x) \ FIELD_PREP(AD7173_INTERFACE_DATA_STAT, x) #define AD7173_SETUP_BIPOLAR BIT(12) #define AD7173_SETUP_AREF_BUF_MASK GENMASK(11, 10) #define AD7173_SETUP_AIN_BUF_MASK GENMASK(9, 8) #define AD7173_SETUP_REF_SEL_MASK GENMASK(5, 4) #define AD7173_SETUP_REF_SEL_AVDD1_AVSS 0x3 #define AD7173_SETUP_REF_SEL_INT_REF 0x2 #define AD7173_SETUP_REF_SEL_EXT_REF2 0x1 #define AD7173_SETUP_REF_SEL_EXT_REF 0x0 #define AD7173_VOLTAGE_INT_REF_uV 2500000 #define AD7173_TEMP_SENSIIVITY_uV_per_C 477 #define AD7177_ODR_START_VALUE 0x07 #define AD4111_SHUNT_RESISTOR_OHM 50 #define AD4111_DIVIDER_RATIO 10 #define AD4111_CURRENT_CHAN_CUTOFF 16 #define AD4111_VINCOM_INPUT 0x10 /* 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) ((pin1) == AD4111_VINCOM_INPUT && \ (pin2) < st->info->num_voltage_in && \ (pin2) >= st->info->num_voltage_in_div) #define AD7173_FILTER_ODR0_MASK GENMASK(5, 0) #define AD7173_MAX_CONFIGS 8 struct ad7173_device_info { const unsigned int *sinc5_data_rates; unsigned int num_sinc5_data_rates; unsigned int odr_start_value; /* * AD4116 has both inputs with a voltage divider and without. * These inputs cannot be mixed in the channel configuration. * Does not include the VINCOM input. */ unsigned int num_voltage_in_div; unsigned int num_channels; unsigned int num_configs; unsigned int num_voltage_in; unsigned int clock; unsigned int id; char *name; bool has_current_inputs; bool has_vincom_input; bool has_temp; /* ((AVDD1 − AVSS)/5) */ bool has_pow_supply_monitoring; bool has_input_buf; bool has_int_ref; bool has_ref2; bool higher_gpio_bits; u8 num_gpios; }; struct ad7173_channel_config { u8 cfg_slot; bool live; /* Following fields are used to compare equality. */ struct_group(config_props, bool bipolar; bool input_buf; u8 odr; u8 ref_sel; ); }; struct ad7173_channel { unsigned int chan_reg; unsigned int ain; struct ad7173_channel_config cfg; }; struct ad7173_state { struct ad_sigma_delta sd; const struct ad7173_device_info *info; struct ad7173_channel *channels; struct regulator_bulk_data regulators[3]; unsigned int adc_mode; unsigned int interface_mode; unsigned int num_channels; struct ida cfg_slots_status; unsigned long long config_usage_counter; unsigned long long *config_cnts; struct clk *ext_clk; struct clk_hw int_clk_hw; #if IS_ENABLED(CONFIG_GPIOLIB) struct regmap *reg_gpiocon_regmap; struct gpio_regmap *gpio_regmap; #endif }; static unsigned int ad4115_sinc5_data_rates[] = { 24845000, 24845000, 20725000, 20725000, /* 0-3 */ 15564000, 13841000, 10390000, 10390000, /* 4-7 */ 4994000, 2499000, 1000000, 500000, /* 8-11 */ 395500, 200000, 100000, 59890, /* 12-15 */ 49920, 20000, 16660, 10000, /* 16-19 */ 5000, 2500, 2500, /* 20-22 */ }; static unsigned int ad4116_sinc5_data_rates[] = { 12422360, 12422360, 12422360, 12422360, /* 0-3 */ 10362690, 10362690, 7782100, 6290530, /* 4-7 */ 5194800, 2496900, 1007600, 499900, /* 8-11 */ 390600, 200300, 100000, 59750, /* 12-15 */ 49840, 20000, 16650, 10000, /* 16-19 */ 5000, 2500, 1250, /* 20-22 */ }; static const unsigned int ad7173_sinc5_data_rates[] = { 6211000, 6211000, 6211000, 6211000, 6211000, 6211000, 5181000, 4444000, /* 0-7 */ 3115000, 2597000, 1007000, 503800, 381000, 200300, 100500, 59520, /* 8-15 */ 49680, 20010, 16333, 10000, 5000, 2500, 1250, /* 16-22 */ }; static const unsigned int ad7175_sinc5_data_rates[] = { 50000000, 41667000, 31250000, 27778000, /* 0-3 */ 20833000, 17857000, 12500000, 10000000, /* 4-7 */ 5000000, 2500000, 1000000, 500000, /* 8-11 */ 397500, 200000, 100000, 59920, /* 12-15 */ 49960, 20000, 16666, 10000, /* 16-19 */ 5000, /* 20 */ }; static unsigned int ad4111_current_channel_config[] = { /* Ain sel: pos neg */ 0x1E8, /* 15:IIN0+ 8:IIN0− */ 0x1C9, /* 14:IIN1+ 9:IIN1− */ 0x1AA, /* 13:IIN2+ 10:IIN2− */ 0x18B, /* 12:IIN3+ 11:IIN3− */ }; static const struct ad7173_device_info ad4111_device_info = { .name = "ad4111", .id = AD4111_ID, .num_voltage_in_div = 8, .num_channels = 16, .num_configs = 8, .num_voltage_in = 8, .num_gpios = 2, .higher_gpio_bits = true, .has_temp = true, .has_vincom_input = true, .has_input_buf = true, .has_current_inputs = true, .has_int_ref = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), }; static const struct ad7173_device_info ad4112_device_info = { .name = "ad4112", .id = AD4112_ID, .num_voltage_in_div = 8, .num_channels = 16, .num_configs = 8, .num_voltage_in = 8, .num_gpios = 2, .higher_gpio_bits = true, .has_vincom_input = true, .has_temp = true, .has_input_buf = true, .has_current_inputs = true, .has_int_ref = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), }; static const struct ad7173_device_info ad4114_device_info = { .name = "ad4114", .id = AD4114_ID, .num_voltage_in_div = 16, .num_channels = 16, .num_configs = 8, .num_voltage_in = 16, .num_gpios = 4, .higher_gpio_bits = true, .has_vincom_input = true, .has_temp = true, .has_input_buf = true, .has_int_ref = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), }; static const struct ad7173_device_info ad4115_device_info = { .name = "ad4115", .id = AD4115_ID, .num_voltage_in_div = 16, .num_channels = 16, .num_configs = 8, .num_voltage_in = 16, .num_gpios = 4, .higher_gpio_bits = true, .has_vincom_input = true, .has_temp = true, .has_input_buf = true, .has_int_ref = true, .clock = 8 * HZ_PER_MHZ, .sinc5_data_rates = ad4115_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad4115_sinc5_data_rates), }; static const struct ad7173_device_info ad4116_device_info = { .name = "ad4116", .id = AD4116_ID, .num_voltage_in_div = 11, .num_channels = 16, .num_configs = 8, .num_voltage_in = 16, .num_gpios = 4, .higher_gpio_bits = true, .has_vincom_input = true, .has_temp = true, .has_input_buf = true, .has_int_ref = true, .clock = 4 * HZ_PER_MHZ, .sinc5_data_rates = ad4116_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad4116_sinc5_data_rates), }; static const struct ad7173_device_info ad7172_2_device_info = { .name = "ad7172-2", .id = AD7172_2_ID, .num_voltage_in = 5, .num_channels = 4, .num_configs = 4, .num_gpios = 2, .has_temp = true, .has_input_buf = true, .has_int_ref = true, .has_pow_supply_monitoring = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), }; static const struct ad7173_device_info ad7172_4_device_info = { .name = "ad7172-4", .id = AD7172_4_ID, .num_voltage_in = 9, .num_channels = 8, .num_configs = 8, .num_gpios = 4, .has_input_buf = true, .has_ref2 = true, .has_pow_supply_monitoring = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), }; static const struct ad7173_device_info ad7173_8_device_info = { .name = "ad7173-8", .id = AD7173_ID, .num_voltage_in = 17, .num_channels = 16, .num_configs = 8, .num_gpios = 4, .has_temp = true, .has_input_buf = true, .has_int_ref = true, .has_ref2 = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), }; static const struct ad7173_device_info ad7175_2_device_info = { .name = "ad7175-2", .id = AD7175_2_ID, .num_voltage_in = 5, .num_channels = 4, .num_configs = 4, .num_gpios = 2, .has_temp = true, .has_input_buf = true, .has_int_ref = true, .has_pow_supply_monitoring = true, .clock = 16 * HZ_PER_MHZ, .sinc5_data_rates = ad7175_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), }; static const struct ad7173_device_info ad7175_8_device_info = { .name = "ad7175-8", .id = AD7175_8_ID, .num_voltage_in = 17, .num_channels = 16, .num_configs = 8, .num_gpios = 4, .has_temp = true, .has_input_buf = true, .has_int_ref = true, .has_ref2 = true, .has_pow_supply_monitoring = true, .clock = 16 * HZ_PER_MHZ, .sinc5_data_rates = ad7175_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), }; static const struct ad7173_device_info ad7176_2_device_info = { .name = "ad7176-2", .id = AD7176_ID, .num_voltage_in = 5, .num_channels = 4, .num_configs = 4, .num_gpios = 2, .has_int_ref = true, .clock = 16 * HZ_PER_MHZ, .sinc5_data_rates = ad7175_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), }; static const struct ad7173_device_info ad7177_2_device_info = { .name = "ad7177-2", .id = AD7177_ID, .num_voltage_in = 5, .num_channels = 4, .num_configs = 4, .num_gpios = 2, .has_temp = true, .has_input_buf = true, .has_int_ref = true, .has_pow_supply_monitoring = true, .clock = 16 * HZ_PER_MHZ, .odr_start_value = AD7177_ODR_START_VALUE, .sinc5_data_rates = ad7175_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), }; static const char *const ad7173_ref_sel_str[] = { [AD7173_SETUP_REF_SEL_EXT_REF] = "vref", [AD7173_SETUP_REF_SEL_EXT_REF2] = "vref2", [AD7173_SETUP_REF_SEL_INT_REF] = "refout-avss", [AD7173_SETUP_REF_SEL_AVDD1_AVSS] = "avdd", }; static const char *const ad7173_clk_sel[] = { "ext-clk", "xtal" }; #if IS_ENABLED(CONFIG_GPIOLIB) static const struct regmap_range ad7173_range_gpio[] = { regmap_reg_range(AD7173_REG_GPIO, AD7173_REG_GPIO), }; static const struct regmap_access_table ad7173_access_table = { .yes_ranges = ad7173_range_gpio, .n_yes_ranges = ARRAY_SIZE(ad7173_range_gpio), }; static const struct regmap_config ad7173_regmap_config = { .reg_bits = 8, .val_bits = 16, .rd_table = &ad7173_access_table, .wr_table = &ad7173_access_table, .read_flag_mask = BIT(6), }; static int ad7173_mask_xlate(struct gpio_regmap *gpio, unsigned int base, unsigned int offset, unsigned int *reg, unsigned int *mask) { *mask = AD7173_GPO_DATA(offset); *reg = base; return 0; } static int ad4111_mask_xlate(struct gpio_regmap *gpio, unsigned int base, unsigned int offset, unsigned int *reg, unsigned int *mask) { *mask = AD4111_GPO01_DATA(offset); *reg = base; return 0; } static void ad7173_gpio_disable(void *data) { struct ad7173_state *st = data; unsigned int mask; mask = AD7173_GPIO_OP_EN0 | AD7173_GPIO_OP_EN1 | AD7173_GPIO_OP_EN2_3; regmap_update_bits(st->reg_gpiocon_regmap, AD7173_REG_GPIO, mask, ~mask); } static int ad7173_gpio_init(struct ad7173_state *st) { struct gpio_regmap_config gpio_regmap = {}; struct device *dev = &st->sd.spi->dev; unsigned int mask; int ret; st->reg_gpiocon_regmap = devm_regmap_init_spi(st->sd.spi, &ad7173_regmap_config); ret = PTR_ERR_OR_ZERO(st->reg_gpiocon_regmap); if (ret) return dev_err_probe(dev, ret, "Unable to init regmap\n"); mask = AD7173_GPIO_OP_EN0 | AD7173_GPIO_OP_EN1 | AD7173_GPIO_OP_EN2_3; regmap_update_bits(st->reg_gpiocon_regmap, AD7173_REG_GPIO, mask, mask); ret = devm_add_action_or_reset(dev, ad7173_gpio_disable, st); if (ret) return ret; gpio_regmap.parent = dev; gpio_regmap.regmap = st->reg_gpiocon_regmap; gpio_regmap.ngpio = st->info->num_gpios; gpio_regmap.reg_set_base = AD7173_REG_GPIO; if (st->info->higher_gpio_bits) gpio_regmap.reg_mask_xlate = ad4111_mask_xlate; else gpio_regmap.reg_mask_xlate = ad7173_mask_xlate; st->gpio_regmap = devm_gpio_regmap_register(dev, &gpio_regmap); ret = PTR_ERR_OR_ZERO(st->gpio_regmap); if (ret) return dev_err_probe(dev, ret, "Unable to init gpio-regmap\n"); return 0; } #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) { return container_of(sd, struct ad7173_state, sd); } static struct ad7173_state *clk_hw_to_ad7173(struct clk_hw *hw) { return container_of(hw, struct ad7173_state, int_clk_hw); } static void ad7173_ida_destroy(void *data) { struct ad7173_state *st = data; ida_destroy(&st->cfg_slots_status); } static void ad7173_reset_usage_cnts(struct ad7173_state *st) { memset64(st->config_cnts, 0, st->info->num_configs); st->config_usage_counter = 0; } static struct ad7173_channel_config * ad7173_find_live_config(struct ad7173_state *st, struct ad7173_channel_config *cfg) { struct ad7173_channel_config *cfg_aux; ptrdiff_t cmp_size; int i; cmp_size = sizeof_field(struct ad7173_channel_config, config_props); for (i = 0; i < st->num_channels; i++) { cfg_aux = &st->channels[i].cfg; if (cfg_aux->live && !memcmp(&cfg->config_props, &cfg_aux->config_props, cmp_size)) return cfg_aux; } return NULL; } /* Could be replaced with a generic LRU implementation */ static int ad7173_free_config_slot_lru(struct ad7173_state *st) { int i, lru_position = 0; for (i = 1; i < st->info->num_configs; i++) if (st->config_cnts[i] < st->config_cnts[lru_position]) lru_position = i; for (i = 0; i < st->num_channels; i++) if (st->channels[i].cfg.cfg_slot == lru_position) st->channels[i].cfg.live = false; ida_free(&st->cfg_slots_status, lru_position); return ida_alloc(&st->cfg_slots_status, GFP_KERNEL); } /* Could be replaced with a generic LRU implementation */ static int ad7173_load_config(struct ad7173_state *st, struct ad7173_channel_config *cfg) { unsigned int config; int free_cfg_slot, ret; free_cfg_slot = ida_alloc_range(&st->cfg_slots_status, 0, st->info->num_configs - 1, GFP_KERNEL); if (free_cfg_slot < 0) free_cfg_slot = ad7173_free_config_slot_lru(st); cfg->cfg_slot = free_cfg_slot; config = FIELD_PREP(AD7173_SETUP_REF_SEL_MASK, cfg->ref_sel); if (cfg->bipolar) config |= AD7173_SETUP_BIPOLAR; if (cfg->input_buf) config |= AD7173_SETUP_AIN_BUF_MASK; ret = ad_sd_write_reg(&st->sd, AD7173_REG_SETUP(free_cfg_slot), 2, config); if (ret) return ret; return ad_sd_write_reg(&st->sd, AD7173_REG_FILTER(free_cfg_slot), 2, AD7173_FILTER_ODR0_MASK & cfg->odr); } static int ad7173_config_channel(struct ad7173_state *st, int addr) { struct ad7173_channel_config *cfg = &st->channels[addr].cfg; struct ad7173_channel_config *live_cfg; int ret; if (!cfg->live) { live_cfg = ad7173_find_live_config(st, cfg); if (live_cfg) { cfg->cfg_slot = live_cfg->cfg_slot; } else { ret = ad7173_load_config(st, cfg); if (ret) return ret; cfg->live = true; } } if (st->config_usage_counter == U64_MAX) ad7173_reset_usage_cnts(st); st->config_usage_counter++; st->config_cnts[cfg->cfg_slot] = st->config_usage_counter; return 0; } static int ad7173_set_channel(struct ad_sigma_delta *sd, unsigned int channel) { struct ad7173_state *st = ad_sigma_delta_to_ad7173(sd); unsigned int val; int ret; ret = ad7173_config_channel(st, channel); if (ret) return ret; val = AD7173_CH_ENABLE | FIELD_PREP(AD7173_CH_SETUP_SEL_MASK, st->channels[channel].cfg.cfg_slot) | st->channels[channel].ain; return ad_sd_write_reg(&st->sd, AD7173_REG_CH(channel), 2, val); } static int ad7173_set_mode(struct ad_sigma_delta *sd, enum ad_sigma_delta_mode mode) { struct ad7173_state *st = ad_sigma_delta_to_ad7173(sd); st->adc_mode &= ~AD7173_ADC_MODE_MODE_MASK; st->adc_mode |= FIELD_PREP(AD7173_ADC_MODE_MODE_MASK, mode); return ad_sd_write_reg(&st->sd, AD7173_REG_ADC_MODE, 2, st->adc_mode); } static int ad7173_append_status(struct ad_sigma_delta *sd, bool append) { struct ad7173_state *st = ad_sigma_delta_to_ad7173(sd); unsigned int interface_mode = st->interface_mode; int ret; interface_mode &= ~AD7173_INTERFACE_DATA_STAT; interface_mode |= AD7173_INTERFACE_DATA_STAT_EN(append); ret = ad_sd_write_reg(&st->sd, AD7173_REG_INTERFACE_MODE, 2, interface_mode); if (ret) return ret; st->interface_mode = interface_mode; return 0; } static int ad7173_disable_all(struct ad_sigma_delta *sd) { struct ad7173_state *st = ad_sigma_delta_to_ad7173(sd); int ret; int i; for (i = 0; i < st->num_channels; i++) { ret = ad_sd_write_reg(sd, AD7173_REG_CH(i), 2, 0); if (ret < 0) return ret; } return 0; } static int ad7173_disable_one(struct ad_sigma_delta *sd, unsigned int chan) { return ad_sd_write_reg(sd, AD7173_REG_CH(chan), 2, 0); } static struct ad_sigma_delta_info ad7173_sigma_delta_info = { .set_channel = ad7173_set_channel, .append_status = ad7173_append_status, .disable_all = ad7173_disable_all, .disable_one = ad7173_disable_one, .set_mode = ad7173_set_mode, .has_registers = true, .addr_shift = 0, .read_mask = BIT(6), .status_ch_mask = GENMASK(3, 0), .data_reg = AD7173_REG_DATA, }; static int ad7173_setup(struct iio_dev *indio_dev) { struct ad7173_state *st = iio_priv(indio_dev); struct device *dev = &st->sd.spi->dev; u8 buf[AD7173_RESET_LENGTH]; unsigned int id; int ret; /* reset the serial interface */ memset(buf, 0xff, AD7173_RESET_LENGTH); ret = spi_write_then_read(st->sd.spi, buf, sizeof(buf), NULL, 0); if (ret < 0) return ret; /* datasheet recommends a delay of at least 500us after reset */ fsleep(500); ret = ad_sd_read_reg(&st->sd, AD7173_REG_ID, 2, &id); if (ret) return ret; id &= AD7173_ID_MASK; if (id != st->info->id) dev_warn(dev, "Unexpected device id: 0x%04X, expected: 0x%04X\n", id, st->info->id); st->adc_mode |= AD7173_ADC_MODE_SING_CYC; st->interface_mode = 0x0; st->config_usage_counter = 0; st->config_cnts = devm_kcalloc(dev, st->info->num_configs, sizeof(*st->config_cnts), GFP_KERNEL); if (!st->config_cnts) return -ENOMEM; /* All channels are enabled by default after a reset */ return ad7173_disable_all(&st->sd); } static unsigned int ad7173_get_ref_voltage_milli(struct ad7173_state *st, u8 reference_select) { int vref; switch (reference_select) { case AD7173_SETUP_REF_SEL_EXT_REF: vref = regulator_get_voltage(st->regulators[0].consumer); break; case AD7173_SETUP_REF_SEL_EXT_REF2: vref = regulator_get_voltage(st->regulators[1].consumer); break; case AD7173_SETUP_REF_SEL_INT_REF: vref = AD7173_VOLTAGE_INT_REF_uV; break; case AD7173_SETUP_REF_SEL_AVDD1_AVSS: vref = regulator_get_voltage(st->regulators[2].consumer); break; default: return -EINVAL; } if (vref < 0) return vref; return vref / (MICRO / MILLI); } static int ad7173_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long info) { struct ad7173_state *st = iio_priv(indio_dev); struct ad7173_channel *ch = &st->channels[chan->address]; unsigned int reg; u64 temp; int ret; switch (info) { case IIO_CHAN_INFO_RAW: ret = ad_sigma_delta_single_conversion(indio_dev, chan, val); if (ret < 0) return ret; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: switch (chan->type) { case IIO_TEMP: temp = AD7173_VOLTAGE_INT_REF_uV * MILLI; temp /= AD7173_TEMP_SENSIIVITY_uV_per_C; *val = temp; *val2 = chan->scan_type.realbits; return IIO_VAL_FRACTIONAL_LOG2; case IIO_VOLTAGE: *val = ad7173_get_ref_voltage_milli(st, ch->cfg.ref_sel); *val2 = chan->scan_type.realbits - !!(ch->cfg.bipolar); if (chan->channel < st->info->num_voltage_in_div) *val *= AD4111_DIVIDER_RATIO; return IIO_VAL_FRACTIONAL_LOG2; case IIO_CURRENT: *val = ad7173_get_ref_voltage_milli(st, ch->cfg.ref_sel); *val /= AD4111_SHUNT_RESISTOR_OHM; *val2 = chan->scan_type.realbits - ch->cfg.bipolar; return IIO_VAL_FRACTIONAL_LOG2; default: return -EINVAL; } case IIO_CHAN_INFO_OFFSET: switch (chan->type) { case IIO_TEMP: /* 0 Kelvin -> raw sample */ temp = -ABSOLUTE_ZERO_MILLICELSIUS; temp *= AD7173_TEMP_SENSIIVITY_uV_per_C; temp <<= chan->scan_type.realbits; temp = DIV_U64_ROUND_CLOSEST(temp, AD7173_VOLTAGE_INT_REF_uV * MILLI); *val = -temp; return IIO_VAL_INT; case IIO_VOLTAGE: case IIO_CURRENT: *val = -BIT(chan->scan_type.realbits - 1); return IIO_VAL_INT; default: return -EINVAL; } case IIO_CHAN_INFO_SAMP_FREQ: reg = st->channels[chan->address].cfg.odr; *val = st->info->sinc5_data_rates[reg] / MILLI; *val2 = (st->info->sinc5_data_rates[reg] % MILLI) * (MICRO / MILLI); return IIO_VAL_INT_PLUS_MICRO; default: return -EINVAL; } } static int ad7173_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long info) { struct ad7173_state *st = iio_priv(indio_dev); struct ad7173_channel_config *cfg; unsigned int freq, i; int ret; ret = iio_device_claim_direct_mode(indio_dev); if (ret) return ret; switch (info) { /* * This attribute sets the sampling frequency for each channel individually. * There are no issues for raw or buffered reads of an individual channel. * * When multiple channels are enabled in buffered mode, the effective * sampling rate of a channel is lowered in correlation to the number * of channels enabled and the sampling rate of the other channels. * * Example: 3 channels enabled with rates CH1:6211sps CH2,CH3:10sps * While the reading of CH1 takes only 0.16ms, the reading of CH2 and CH3 * will take 100ms each. * * This will cause the reading of CH1 to be actually done once every * 200.16ms, an effective rate of 4.99sps. */ case IIO_CHAN_INFO_SAMP_FREQ: freq = val * MILLI + val2 / MILLI; for (i = st->info->odr_start_value; i < st->info->num_sinc5_data_rates - 1; i++) if (freq >= st->info->sinc5_data_rates[i]) break; cfg = &st->channels[chan->address].cfg; cfg->odr = i; cfg->live = false; break; default: ret = -EINVAL; break; } iio_device_release_direct_mode(indio_dev); return ret; } static int ad7173_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { struct ad7173_state *st = iio_priv(indio_dev); int i, ret; for (i = 0; i < indio_dev->num_channels; i++) { if (test_bit(i, scan_mask)) ret = ad7173_set_channel(&st->sd, i); else ret = ad_sd_write_reg(&st->sd, AD7173_REG_CH(i), 2, 0); if (ret < 0) return ret; } return 0; } static int ad7173_debug_reg_access(struct iio_dev *indio_dev, unsigned int reg, unsigned int writeval, unsigned int *readval) { struct ad7173_state *st = iio_priv(indio_dev); u8 reg_size; if (reg == AD7173_REG_COMMS) reg_size = 1; else if (reg == AD7173_REG_CRC || reg == AD7173_REG_DATA || reg >= AD7173_REG_OFFSET(0)) reg_size = 3; else reg_size = 2; if (readval) return ad_sd_read_reg(&st->sd, reg, reg_size, readval); return ad_sd_write_reg(&st->sd, reg, reg_size, writeval); } static const struct iio_info ad7173_info = { .read_raw = &ad7173_read_raw, .write_raw = &ad7173_write_raw, .debugfs_reg_access = &ad7173_debug_reg_access, .validate_trigger = ad_sd_validate_trigger, .update_scan_mode = ad7173_update_scan_mode, }; static const struct iio_chan_spec ad7173_channel_template = { .type = IIO_VOLTAGE, .indexed = 1, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_SAMP_FREQ), .scan_type = { .sign = 'u', .realbits = 24, .storagebits = 32, .endianness = IIO_BE, }, }; static const struct iio_chan_spec ad7173_temp_iio_channel_template = { .type = IIO_TEMP, .channel = AD7173_AIN_TEMP_POS, .channel2 = AD7173_AIN_TEMP_NEG, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET) | BIT(IIO_CHAN_INFO_SAMP_FREQ), .scan_type = { .sign = 'u', .realbits = 24, .storagebits = 32, .endianness = IIO_BE, }, }; static void ad7173_disable_regulators(void *data) { struct ad7173_state *st = data; regulator_bulk_disable(ARRAY_SIZE(st->regulators), st->regulators); } static void ad7173_clk_disable_unprepare(void *clk) { clk_disable_unprepare(clk); } static unsigned long ad7173_sel_clk(struct ad7173_state *st, unsigned int clk_sel) { int ret; st->adc_mode &= ~AD7173_ADC_MODE_CLOCKSEL_MASK; st->adc_mode |= FIELD_PREP(AD7173_ADC_MODE_CLOCKSEL_MASK, clk_sel); ret = ad_sd_write_reg(&st->sd, AD7173_REG_ADC_MODE, 0x2, st->adc_mode); return ret; } static unsigned long ad7173_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { struct ad7173_state *st = clk_hw_to_ad7173(hw); return st->info->clock / HZ_PER_KHZ; } static int ad7173_clk_output_is_enabled(struct clk_hw *hw) { struct ad7173_state *st = clk_hw_to_ad7173(hw); u32 clk_sel; clk_sel = FIELD_GET(AD7173_ADC_MODE_CLOCKSEL_MASK, st->adc_mode); return clk_sel == AD7173_ADC_MODE_CLOCKSEL_INT_OUTPUT; } static int ad7173_clk_output_prepare(struct clk_hw *hw) { struct ad7173_state *st = clk_hw_to_ad7173(hw); return ad7173_sel_clk(st, AD7173_ADC_MODE_CLOCKSEL_INT_OUTPUT); } static void ad7173_clk_output_unprepare(struct clk_hw *hw) { struct ad7173_state *st = clk_hw_to_ad7173(hw); ad7173_sel_clk(st, AD7173_ADC_MODE_CLOCKSEL_INT); } static const struct clk_ops ad7173_int_clk_ops = { .recalc_rate = ad7173_clk_recalc_rate, .is_enabled = ad7173_clk_output_is_enabled, .prepare = ad7173_clk_output_prepare, .unprepare = ad7173_clk_output_unprepare, }; static int ad7173_register_clk_provider(struct iio_dev *indio_dev) { struct ad7173_state *st = iio_priv(indio_dev); struct device *dev = indio_dev->dev.parent; struct fwnode_handle *fwnode = dev_fwnode(dev); struct clk_init_data init = {}; int ret; if (!IS_ENABLED(CONFIG_COMMON_CLK)) return 0; init.name = fwnode_get_name(fwnode); init.ops = &ad7173_int_clk_ops; st->int_clk_hw.init = &init; ret = devm_clk_hw_register(dev, &st->int_clk_hw); if (ret) return ret; return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, &st->int_clk_hw); } static int ad4111_validate_current_ain(struct ad7173_state *st, const unsigned int ain[AD7173_NO_AINS_PER_CHANNEL]) { struct device *dev = &st->sd.spi->dev; if (!st->info->has_current_inputs) return dev_err_probe(dev, -EINVAL, "Model %s does not support current channels\n", st->info->name); if (ain[0] >= ARRAY_SIZE(ad4111_current_channel_config)) return dev_err_probe(dev, -EINVAL, "For current channels single-channel must be <[0-3]>\n"); return 0; } static int ad7173_validate_voltage_ain_inputs(struct ad7173_state *st, unsigned int ain0, unsigned int ain1) { struct device *dev = &st->sd.spi->dev; bool special_input0, special_input1; /* (AVDD1-AVSS)/5 power supply monitoring */ if (ain0 == AD7173_AIN_POW_MON_POS && ain1 == AD7173_AIN_POW_MON_NEG && st->info->has_pow_supply_monitoring) return 0; special_input0 = AD7173_IS_REF_INPUT(ain0) || (ain0 == AD4111_VINCOM_INPUT && st->info->has_vincom_input); special_input1 = AD7173_IS_REF_INPUT(ain1) || (ain1 == AD4111_VINCOM_INPUT && st->info->has_vincom_input); if ((ain0 >= st->info->num_voltage_in && !special_input0) || (ain1 >= st->info->num_voltage_in && !special_input1)) { if (ain0 == AD4111_VINCOM_INPUT || ain1 == AD4111_VINCOM_INPUT) return dev_err_probe(dev, -EINVAL, "VINCOM not supported for %s\n", st->info->name); return dev_err_probe(dev, -EINVAL, "Input pin number out of range for pair (%d %d).\n", ain0, ain1); } if (AD4111_IS_VINCOM_MISMATCH(ain0, ain1) || AD4111_IS_VINCOM_MISMATCH(ain1, ain0)) return dev_err_probe(dev, -EINVAL, "VINCOM must be paired with inputs having divider.\n"); if (!special_input0 && !special_input1 && ((ain0 >= st->info->num_voltage_in_div) != (ain1 >= st->info->num_voltage_in_div))) return dev_err_probe(dev, -EINVAL, "Both inputs must either have a voltage divider or not have: (%d %d).\n", ain0, ain1); return 0; } static int ad7173_validate_reference(struct ad7173_state *st, int ref_sel) { struct device *dev = &st->sd.spi->dev; int ret; if (ref_sel == AD7173_SETUP_REF_SEL_INT_REF && !st->info->has_int_ref) return dev_err_probe(dev, -EINVAL, "Internal reference is not available on current model.\n"); if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 && !st->info->has_ref2) return dev_err_probe(dev, -EINVAL, "External reference 2 is not available on current model.\n"); ret = ad7173_get_ref_voltage_milli(st, ref_sel); if (ret < 0) return dev_err_probe(dev, ret, "Cannot use reference %u\n", ref_sel); return 0; } static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev) { struct ad7173_channel *chans_st_arr, *chan_st_priv; struct ad7173_state *st = iio_priv(indio_dev); struct device *dev = indio_dev->dev.parent; struct iio_chan_spec *chan_arr, *chan; unsigned int ain[AD7173_NO_AINS_PER_CHANNEL], chan_index = 0; int ref_sel, ret, num_channels; num_channels = device_get_child_node_count(dev); if (st->info->has_temp) num_channels++; if (num_channels == 0) return dev_err_probe(dev, -ENODATA, "No channels specified\n"); if (num_channels > st->info->num_channels) return dev_err_probe(dev, -EINVAL, "Too many channels specified. Maximum is %d, not including temperature channel if supported.\n", st->info->num_channels); indio_dev->num_channels = num_channels; st->num_channels = num_channels; chan_arr = devm_kcalloc(dev, sizeof(*indio_dev->channels), st->num_channels, GFP_KERNEL); if (!chan_arr) return -ENOMEM; chans_st_arr = devm_kcalloc(dev, st->num_channels, sizeof(*st->channels), GFP_KERNEL); if (!chans_st_arr) return -ENOMEM; indio_dev->channels = chan_arr; st->channels = chans_st_arr; if (st->info->has_temp) { chan_arr[chan_index] = ad7173_temp_iio_channel_template; chan_st_priv = &chans_st_arr[chan_index]; chan_st_priv->ain = AD7173_CH_ADDRESS(chan_arr[chan_index].channel, chan_arr[chan_index].channel2); chan_st_priv->cfg.bipolar = false; chan_st_priv->cfg.input_buf = st->info->has_input_buf; chan_st_priv->cfg.ref_sel = AD7173_SETUP_REF_SEL_INT_REF; st->adc_mode |= AD7173_ADC_MODE_REF_EN; chan_index++; } device_for_each_child_node_scoped(dev, child) { bool is_current_chan = false; chan = &chan_arr[chan_index]; *chan = ad7173_channel_template; chan_st_priv = &chans_st_arr[chan_index]; ret = fwnode_property_read_u32_array(child, "diff-channels", ain, ARRAY_SIZE(ain)); if (ret) { ret = fwnode_property_read_u32(child, "single-channel", ain); if (ret) return dev_err_probe(dev, ret, "Channel must define one of diff-channels or single-channel.\n"); is_current_chan = fwnode_property_read_bool(child, "adi,current-channel"); } else { chan->differential = true; } if (is_current_chan) { ret = ad4111_validate_current_ain(st, ain); if (ret) return ret; } else { if (!chan->differential) { ret = fwnode_property_read_u32(child, "common-mode-channel", ain + 1); if (ret) return dev_err_probe(dev, ret, "common-mode-channel must be defined for single-ended channels.\n"); } ret = ad7173_validate_voltage_ain_inputs(st, ain[0], ain[1]); if (ret) return ret; } ret = fwnode_property_match_property_string(child, "adi,reference-select", ad7173_ref_sel_str, ARRAY_SIZE(ad7173_ref_sel_str)); if (ret < 0) ref_sel = AD7173_SETUP_REF_SEL_INT_REF; else ref_sel = ret; ret = ad7173_validate_reference(st, ref_sel); if (ret) return ret; if (ref_sel == AD7173_SETUP_REF_SEL_INT_REF) st->adc_mode |= AD7173_ADC_MODE_REF_EN; chan_st_priv->cfg.ref_sel = ref_sel; chan->address = chan_index; chan->scan_index = chan_index; chan->channel = ain[0]; chan_st_priv->chan_reg = chan_index; chan_st_priv->cfg.input_buf = st->info->has_input_buf; chan_st_priv->cfg.odr = 0; chan_st_priv->cfg.bipolar = fwnode_property_read_bool(child, "bipolar"); if (chan_st_priv->cfg.bipolar) chan->info_mask_separate |= BIT(IIO_CHAN_INFO_OFFSET); if (is_current_chan) { chan->type = IIO_CURRENT; chan->differential = false; chan->channel2 = 0; chan_st_priv->ain = ad4111_current_channel_config[ain[0]]; } else { chan_st_priv->cfg.input_buf = st->info->has_input_buf; chan->channel2 = ain[1]; chan_st_priv->ain = AD7173_CH_ADDRESS(ain[0], ain[1]); } chan_index++; } return 0; } static int ad7173_fw_parse_device_config(struct iio_dev *indio_dev) { struct ad7173_state *st = iio_priv(indio_dev); struct device *dev = indio_dev->dev.parent; int ret; st->regulators[0].supply = ad7173_ref_sel_str[AD7173_SETUP_REF_SEL_EXT_REF]; st->regulators[1].supply = ad7173_ref_sel_str[AD7173_SETUP_REF_SEL_EXT_REF2]; st->regulators[2].supply = ad7173_ref_sel_str[AD7173_SETUP_REF_SEL_AVDD1_AVSS]; /* * If a regulator is not available, it will be set to a dummy regulator. * Each channel reference is checked with regulator_get_voltage() before * setting attributes so if any channel uses a dummy supply the driver * probe will fail. */ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(st->regulators), st->regulators); if (ret) return dev_err_probe(dev, ret, "Failed to get regulators\n"); ret = regulator_bulk_enable(ARRAY_SIZE(st->regulators), st->regulators); if (ret) return dev_err_probe(dev, ret, "Failed to enable regulators\n"); ret = devm_add_action_or_reset(dev, ad7173_disable_regulators, st); if (ret) return dev_err_probe(dev, ret, "Failed to add regulators disable action\n"); ret = device_property_match_property_string(dev, "clock-names", ad7173_clk_sel, ARRAY_SIZE(ad7173_clk_sel)); if (ret < 0) { st->adc_mode |= FIELD_PREP(AD7173_ADC_MODE_CLOCKSEL_MASK, AD7173_ADC_MODE_CLOCKSEL_INT); ad7173_register_clk_provider(indio_dev); } else { st->adc_mode |= FIELD_PREP(AD7173_ADC_MODE_CLOCKSEL_MASK, AD7173_ADC_MODE_CLOCKSEL_EXT + ret); st->ext_clk = devm_clk_get(dev, ad7173_clk_sel[ret]); if (IS_ERR(st->ext_clk)) return dev_err_probe(dev, PTR_ERR(st->ext_clk), "Failed to get external clock\n"); ret = clk_prepare_enable(st->ext_clk); if (ret) return dev_err_probe(dev, ret, "Failed to enable external clock\n"); ret = devm_add_action_or_reset(dev, ad7173_clk_disable_unprepare, st->ext_clk); if (ret) return ret; } ret = fwnode_irq_get_byname(dev_fwnode(dev), "rdy"); if (ret < 0) return dev_err_probe(dev, ret, "Interrupt 'rdy' is required\n"); ad7173_sigma_delta_info.irq_line = ret; return ad7173_fw_parse_channel_config(indio_dev); } static int ad7173_probe(struct spi_device *spi) { struct device *dev = &spi->dev; struct ad7173_state *st; struct iio_dev *indio_dev; int ret; indio_dev = devm_iio_device_alloc(dev, sizeof(*st)); if (!indio_dev) return -ENOMEM; st = iio_priv(indio_dev); st->info = spi_get_device_match_data(spi); if (!st->info) return -ENODEV; ida_init(&st->cfg_slots_status); ret = devm_add_action_or_reset(dev, ad7173_ida_destroy, st); if (ret) return ret; indio_dev->name = st->info->name; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &ad7173_info; spi->mode = SPI_MODE_3; spi_setup(spi); ad7173_sigma_delta_info.num_slots = st->info->num_configs; ret = ad_sd_init(&st->sd, indio_dev, spi, &ad7173_sigma_delta_info); if (ret) return ret; ret = ad7173_fw_parse_device_config(indio_dev); if (ret) return ret; ret = devm_ad_sd_setup_buffer_and_trigger(dev, indio_dev); if (ret) return ret; ret = ad7173_setup(indio_dev); if (ret) return ret; ret = devm_iio_device_register(dev, indio_dev); if (ret) return ret; if (IS_ENABLED(CONFIG_GPIOLIB)) return ad7173_gpio_init(st); return 0; } static const struct of_device_id ad7173_of_match[] = { { .compatible = "ad4111", .data = &ad4111_device_info }, { .compatible = "ad4112", .data = &ad4112_device_info }, { .compatible = "ad4114", .data = &ad4114_device_info }, { .compatible = "ad4115", .data = &ad4115_device_info }, { .compatible = "ad4116", .data = &ad4116_device_info }, { .compatible = "adi,ad7172-2", .data = &ad7172_2_device_info }, { .compatible = "adi,ad7172-4", .data = &ad7172_4_device_info }, { .compatible = "adi,ad7173-8", .data = &ad7173_8_device_info }, { .compatible = "adi,ad7175-2", .data = &ad7175_2_device_info }, { .compatible = "adi,ad7175-8", .data = &ad7175_8_device_info }, { .compatible = "adi,ad7176-2", .data = &ad7176_2_device_info }, { .compatible = "adi,ad7177-2", .data = &ad7177_2_device_info }, { } }; MODULE_DEVICE_TABLE(of, ad7173_of_match); static const struct spi_device_id ad7173_id_table[] = { { "ad4111", (kernel_ulong_t)&ad4111_device_info }, { "ad4112", (kernel_ulong_t)&ad4112_device_info }, { "ad4114", (kernel_ulong_t)&ad4114_device_info }, { "ad4115", (kernel_ulong_t)&ad4115_device_info }, { "ad4116", (kernel_ulong_t)&ad4116_device_info }, { "ad7172-2", (kernel_ulong_t)&ad7172_2_device_info }, { "ad7172-4", (kernel_ulong_t)&ad7172_4_device_info }, { "ad7173-8", (kernel_ulong_t)&ad7173_8_device_info }, { "ad7175-2", (kernel_ulong_t)&ad7175_2_device_info }, { "ad7175-8", (kernel_ulong_t)&ad7175_8_device_info }, { "ad7176-2", (kernel_ulong_t)&ad7176_2_device_info }, { "ad7177-2", (kernel_ulong_t)&ad7177_2_device_info }, { } }; MODULE_DEVICE_TABLE(spi, ad7173_id_table); static struct spi_driver ad7173_driver = { .driver = { .name = "ad7173", .of_match_table = ad7173_of_match, }, .probe = ad7173_probe, .id_table = ad7173_id_table, }; module_spi_driver(ad7173_driver); MODULE_IMPORT_NS(IIO_AD_SIGMA_DELTA); MODULE_AUTHOR("Lars-Peter Clausen "); MODULE_AUTHOR("Dumitru Ceclan "); MODULE_DESCRIPTION("Analog Devices AD7173 and similar ADC driver"); MODULE_LICENSE("GPL");