1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * AD7091R5 Analog to Digital converter driver 4 * 5 * Copyright 2014-2019 Analog Devices Inc. 6 */ 7 8 #include <linux/i2c.h> 9 #include <linux/iio/iio.h> 10 #include <linux/module.h> 11 #include <linux/regmap.h> 12 13 #include "ad7091r-base.h" 14 15 static const struct iio_event_spec ad7091r5_events[] = { 16 { 17 .type = IIO_EV_TYPE_THRESH, 18 .dir = IIO_EV_DIR_RISING, 19 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 20 BIT(IIO_EV_INFO_ENABLE), 21 }, 22 { 23 .type = IIO_EV_TYPE_THRESH, 24 .dir = IIO_EV_DIR_FALLING, 25 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 26 BIT(IIO_EV_INFO_ENABLE), 27 }, 28 { 29 .type = IIO_EV_TYPE_THRESH, 30 .dir = IIO_EV_DIR_EITHER, 31 .mask_separate = BIT(IIO_EV_INFO_HYSTERESIS), 32 }, 33 }; 34 35 #define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \ 36 .type = IIO_VOLTAGE, \ 37 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 38 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ 39 .indexed = 1, \ 40 .channel = idx, \ 41 .event_spec = ev, \ 42 .num_event_specs = num_ev, \ 43 .scan_type.storagebits = 16, \ 44 .scan_type.realbits = bits, \ 45 } 46 static const struct iio_chan_spec ad7091r5_channels_irq[] = { 47 AD7091R_CHANNEL(0, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)), 48 AD7091R_CHANNEL(1, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)), 49 AD7091R_CHANNEL(2, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)), 50 AD7091R_CHANNEL(3, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)), 51 }; 52 53 static const struct iio_chan_spec ad7091r5_channels_noirq[] = { 54 AD7091R_CHANNEL(0, 12, NULL, 0), 55 AD7091R_CHANNEL(1, 12, NULL, 0), 56 AD7091R_CHANNEL(2, 12, NULL, 0), 57 AD7091R_CHANNEL(3, 12, NULL, 0), 58 }; 59 60 static const struct ad7091r_chip_info ad7091r5_chip_info_irq = { 61 .channels = ad7091r5_channels_irq, 62 .num_channels = ARRAY_SIZE(ad7091r5_channels_irq), 63 .vref_mV = 2500, 64 }; 65 66 static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = { 67 .channels = ad7091r5_channels_noirq, 68 .num_channels = ARRAY_SIZE(ad7091r5_channels_noirq), 69 .vref_mV = 2500, 70 }; 71 72 static int ad7091r5_i2c_probe(struct i2c_client *i2c) 73 { 74 const struct i2c_device_id *id = i2c_client_get_device_id(i2c); 75 const struct ad7091r_chip_info *chip_info; 76 struct regmap *map = devm_regmap_init_i2c(i2c, &ad7091r_regmap_config); 77 78 if (IS_ERR(map)) 79 return PTR_ERR(map); 80 81 if (i2c->irq) 82 chip_info = &ad7091r5_chip_info_irq; 83 else 84 chip_info = &ad7091r5_chip_info_noirq; 85 86 return ad7091r_probe(&i2c->dev, id->name, chip_info, map, i2c->irq); 87 } 88 89 static const struct of_device_id ad7091r5_dt_ids[] = { 90 { .compatible = "adi,ad7091r5" }, 91 {}, 92 }; 93 MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids); 94 95 static const struct i2c_device_id ad7091r5_i2c_ids[] = { 96 {"ad7091r5", 0}, 97 {} 98 }; 99 MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids); 100 101 static struct i2c_driver ad7091r5_driver = { 102 .driver = { 103 .name = "ad7091r5", 104 .of_match_table = ad7091r5_dt_ids, 105 }, 106 .probe = ad7091r5_i2c_probe, 107 .id_table = ad7091r5_i2c_ids, 108 }; 109 module_i2c_driver(ad7091r5_driver); 110 111 MODULE_AUTHOR("Beniamin Bia <beniamin.bia@analog.com>"); 112 MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver"); 113 MODULE_LICENSE("GPL v2"); 114 MODULE_IMPORT_NS(IIO_AD7091R); 115