drivers/iio/adc/ad7091r5.c

   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");