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_chan_spec ad7091r5_channels_irq[] = { 16 AD7091R_CHANNEL(0, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)), 17 AD7091R_CHANNEL(1, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)), 18 AD7091R_CHANNEL(2, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)), 19 AD7091R_CHANNEL(3, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)), 20 }; 21 22 static const struct iio_chan_spec ad7091r5_channels_noirq[] = { 23 AD7091R_CHANNEL(0, 12, NULL, 0), 24 AD7091R_CHANNEL(1, 12, NULL, 0), 25 AD7091R_CHANNEL(2, 12, NULL, 0), 26 AD7091R_CHANNEL(3, 12, NULL, 0), 27 }; 28 29 static int ad7091r5_set_mode(struct ad7091r_state *st, enum ad7091r_mode mode) 30 { 31 int ret, conf; 32 33 switch (mode) { 34 case AD7091R_MODE_SAMPLE: 35 conf = 0; 36 break; 37 case AD7091R_MODE_COMMAND: 38 conf = AD7091R_REG_CONF_CMD; 39 break; 40 case AD7091R_MODE_AUTOCYCLE: 41 conf = AD7091R_REG_CONF_AUTO; 42 break; 43 default: 44 return -EINVAL; 45 } 46 47 ret = regmap_update_bits(st->map, AD7091R_REG_CONF, 48 AD7091R_REG_CONF_MODE_MASK, conf); 49 if (ret) 50 return ret; 51 52 st->mode = mode; 53 54 return 0; 55 } 56 57 static unsigned int ad7091r5_reg_result_chan_id(unsigned int val) 58 { 59 return AD7091R5_REG_RESULT_CH_ID(val); 60 } 61 62 static const struct ad7091r_chip_info ad7091r5_chip_info_irq = { 63 .name = "ad7091r-5", 64 .channels = ad7091r5_channels_irq, 65 .num_channels = ARRAY_SIZE(ad7091r5_channels_irq), 66 .vref_mV = 2500, 67 .reg_result_chan_id = &ad7091r5_reg_result_chan_id, 68 .set_mode = &ad7091r5_set_mode, 69 }; 70 71 static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = { 72 .name = "ad7091r-5", 73 .channels = ad7091r5_channels_noirq, 74 .num_channels = ARRAY_SIZE(ad7091r5_channels_noirq), 75 .vref_mV = 2500, 76 .reg_result_chan_id = &ad7091r5_reg_result_chan_id, 77 .set_mode = &ad7091r5_set_mode, 78 }; 79 80 static const struct regmap_config ad7091r_regmap_config = { 81 .reg_bits = 8, 82 .val_bits = 16, 83 .writeable_reg = ad7091r_writeable_reg, 84 .volatile_reg = ad7091r_volatile_reg, 85 }; 86 87 static void ad7091r5_regmap_init(struct ad7091r_state *st, 88 const struct regmap_config *regmap_conf) 89 { 90 struct i2c_client *i2c = container_of(st->dev, struct i2c_client, dev); 91 92 st->map = devm_regmap_init_i2c(i2c, regmap_conf); 93 } 94 95 static struct ad7091r_init_info ad7091r5_init_info = { 96 .info_irq = &ad7091r5_chip_info_irq, 97 .info_no_irq = &ad7091r5_chip_info_noirq, 98 .regmap_config = &ad7091r_regmap_config, 99 .init_adc_regmap = &ad7091r5_regmap_init 100 }; 101 102 static int ad7091r5_i2c_probe(struct i2c_client *i2c) 103 { 104 const struct ad7091r_init_info *init_info; 105 106 init_info = i2c_get_match_data(i2c); 107 if (!init_info) 108 return -EINVAL; 109 110 return ad7091r_probe(&i2c->dev, init_info, i2c->irq); 111 } 112 113 static const struct of_device_id ad7091r5_dt_ids[] = { 114 { .compatible = "adi,ad7091r5", .data = &ad7091r5_init_info }, 115 {}, 116 }; 117 MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids); 118 119 static const struct i2c_device_id ad7091r5_i2c_ids[] = { 120 {"ad7091r5", (kernel_ulong_t)&ad7091r5_init_info }, 121 {} 122 }; 123 MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids); 124 125 static struct i2c_driver ad7091r5_driver = { 126 .driver = { 127 .name = "ad7091r5", 128 .of_match_table = ad7091r5_dt_ids, 129 }, 130 .probe = ad7091r5_i2c_probe, 131 .id_table = ad7091r5_i2c_ids, 132 }; 133 module_i2c_driver(ad7091r5_driver); 134 135 MODULE_AUTHOR("Beniamin Bia <beniamin.bia@analog.com>"); 136 MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver"); 137 MODULE_LICENSE("GPL v2"); 138 MODULE_IMPORT_NS(IIO_AD7091R); 139