Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Analog devices AD5380, AD5381, AD5382, AD5383, AD5390, AD5391, AD5392 |
| 3 | * multi-channel Digital to Analog Converters driver |
| 4 | * |
| 5 | * Copyright 2011 Analog Devices Inc. |
| 6 | * |
| 7 | * Licensed under the GPL-2. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/device.h> |
| 11 | #include <linux/err.h> |
| 12 | #include <linux/i2c.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/spi/spi.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/sysfs.h> |
| 18 | #include <linux/regmap.h> |
| 19 | #include <linux/regulator/consumer.h> |
| 20 | |
Jonathan Cameron | 06458e2 | 2012-04-25 15:54:58 +0100 | [diff] [blame] | 21 | #include <linux/iio/iio.h> |
| 22 | #include <linux/iio/sysfs.h> |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 23 | |
| 24 | #define AD5380_REG_DATA(x) (((x) << 2) | 3) |
| 25 | #define AD5380_REG_OFFSET(x) (((x) << 2) | 2) |
| 26 | #define AD5380_REG_GAIN(x) (((x) << 2) | 1) |
| 27 | #define AD5380_REG_SF_PWR_DOWN (8 << 2) |
| 28 | #define AD5380_REG_SF_PWR_UP (9 << 2) |
| 29 | #define AD5380_REG_SF_CTRL (12 << 2) |
| 30 | |
| 31 | #define AD5380_CTRL_PWR_DOWN_MODE_OFFSET 13 |
| 32 | #define AD5380_CTRL_INT_VREF_2V5 BIT(12) |
| 33 | #define AD5380_CTRL_INT_VREF_EN BIT(10) |
| 34 | |
| 35 | /** |
| 36 | * struct ad5380_chip_info - chip specific information |
| 37 | * @channel_template: channel specification template |
| 38 | * @num_channels: number of channels |
| 39 | * @int_vref: internal vref in uV |
| 40 | */ |
| 41 | |
| 42 | struct ad5380_chip_info { |
| 43 | struct iio_chan_spec channel_template; |
| 44 | unsigned int num_channels; |
| 45 | unsigned int int_vref; |
| 46 | }; |
| 47 | |
| 48 | /** |
| 49 | * struct ad5380_state - driver instance specific data |
| 50 | * @regmap: regmap instance used by the device |
| 51 | * @chip_info: chip model specific constants, available modes etc |
| 52 | * @vref_reg: vref supply regulator |
| 53 | * @vref: actual reference voltage used in uA |
| 54 | * @pwr_down: whether the chip is currently in power down mode |
| 55 | */ |
| 56 | |
| 57 | struct ad5380_state { |
| 58 | struct regmap *regmap; |
| 59 | const struct ad5380_chip_info *chip_info; |
| 60 | struct regulator *vref_reg; |
| 61 | int vref; |
| 62 | bool pwr_down; |
| 63 | }; |
| 64 | |
| 65 | enum ad5380_type { |
| 66 | ID_AD5380_3, |
| 67 | ID_AD5380_5, |
| 68 | ID_AD5381_3, |
| 69 | ID_AD5381_5, |
| 70 | ID_AD5382_3, |
| 71 | ID_AD5382_5, |
| 72 | ID_AD5383_3, |
| 73 | ID_AD5383_5, |
| 74 | ID_AD5390_3, |
| 75 | ID_AD5390_5, |
| 76 | ID_AD5391_3, |
| 77 | ID_AD5391_5, |
| 78 | ID_AD5392_3, |
| 79 | ID_AD5392_5, |
| 80 | }; |
| 81 | |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 82 | static ssize_t ad5380_read_dac_powerdown(struct iio_dev *indio_dev, |
| 83 | uintptr_t private, const struct iio_chan_spec *chan, char *buf) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 84 | { |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 85 | struct ad5380_state *st = iio_priv(indio_dev); |
| 86 | |
| 87 | return sprintf(buf, "%d\n", st->pwr_down); |
| 88 | } |
| 89 | |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 90 | static ssize_t ad5380_write_dac_powerdown(struct iio_dev *indio_dev, |
| 91 | uintptr_t private, const struct iio_chan_spec *chan, const char *buf, |
| 92 | size_t len) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 93 | { |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 94 | struct ad5380_state *st = iio_priv(indio_dev); |
| 95 | bool pwr_down; |
| 96 | int ret; |
| 97 | |
| 98 | ret = strtobool(buf, &pwr_down); |
| 99 | if (ret) |
| 100 | return ret; |
| 101 | |
| 102 | mutex_lock(&indio_dev->mlock); |
| 103 | |
| 104 | if (pwr_down) |
| 105 | ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_DOWN, 0); |
| 106 | else |
| 107 | ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_UP, 0); |
| 108 | |
| 109 | st->pwr_down = pwr_down; |
| 110 | |
| 111 | mutex_unlock(&indio_dev->mlock); |
| 112 | |
| 113 | return ret ? ret : len; |
| 114 | } |
| 115 | |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 116 | static const char * const ad5380_powerdown_modes[] = { |
| 117 | "100kohm_to_gnd", |
| 118 | "three_state", |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 119 | }; |
| 120 | |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 121 | static int ad5380_get_powerdown_mode(struct iio_dev *indio_dev, |
| 122 | const struct iio_chan_spec *chan) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 123 | { |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 124 | struct ad5380_state *st = iio_priv(indio_dev); |
| 125 | unsigned int mode; |
| 126 | int ret; |
| 127 | |
| 128 | ret = regmap_read(st->regmap, AD5380_REG_SF_CTRL, &mode); |
| 129 | if (ret) |
| 130 | return ret; |
| 131 | |
| 132 | mode = (mode >> AD5380_CTRL_PWR_DOWN_MODE_OFFSET) & 1; |
| 133 | |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 134 | return mode; |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 135 | } |
| 136 | |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 137 | static int ad5380_set_powerdown_mode(struct iio_dev *indio_dev, |
| 138 | const struct iio_chan_spec *chan, unsigned int mode) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 139 | { |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 140 | struct ad5380_state *st = iio_priv(indio_dev); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 141 | int ret; |
| 142 | |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 143 | ret = regmap_update_bits(st->regmap, AD5380_REG_SF_CTRL, |
| 144 | 1 << AD5380_CTRL_PWR_DOWN_MODE_OFFSET, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 145 | mode << AD5380_CTRL_PWR_DOWN_MODE_OFFSET); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 146 | |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 147 | return ret; |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 148 | } |
| 149 | |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 150 | static const struct iio_enum ad5380_powerdown_mode_enum = { |
| 151 | .items = ad5380_powerdown_modes, |
| 152 | .num_items = ARRAY_SIZE(ad5380_powerdown_modes), |
| 153 | .get = ad5380_get_powerdown_mode, |
| 154 | .set = ad5380_set_powerdown_mode, |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 155 | }; |
| 156 | |
| 157 | static unsigned int ad5380_info_to_reg(struct iio_chan_spec const *chan, |
| 158 | long info) |
| 159 | { |
| 160 | switch (info) { |
| 161 | case 0: |
| 162 | return AD5380_REG_DATA(chan->address); |
| 163 | case IIO_CHAN_INFO_CALIBBIAS: |
| 164 | return AD5380_REG_OFFSET(chan->address); |
| 165 | case IIO_CHAN_INFO_CALIBSCALE: |
| 166 | return AD5380_REG_GAIN(chan->address); |
| 167 | default: |
| 168 | break; |
| 169 | } |
| 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static int ad5380_write_raw(struct iio_dev *indio_dev, |
| 175 | struct iio_chan_spec const *chan, int val, int val2, long info) |
| 176 | { |
| 177 | const unsigned int max_val = (1 << chan->scan_type.realbits); |
| 178 | struct ad5380_state *st = iio_priv(indio_dev); |
| 179 | |
| 180 | switch (info) { |
Jonathan Cameron | 09f4eb4 | 2012-04-15 17:41:19 +0100 | [diff] [blame] | 181 | case IIO_CHAN_INFO_RAW: |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 182 | case IIO_CHAN_INFO_CALIBSCALE: |
| 183 | if (val >= max_val || val < 0) |
| 184 | return -EINVAL; |
| 185 | |
| 186 | return regmap_write(st->regmap, |
| 187 | ad5380_info_to_reg(chan, info), |
| 188 | val << chan->scan_type.shift); |
| 189 | case IIO_CHAN_INFO_CALIBBIAS: |
| 190 | val += (1 << chan->scan_type.realbits) / 2; |
| 191 | if (val >= max_val || val < 0) |
| 192 | return -EINVAL; |
| 193 | |
| 194 | return regmap_write(st->regmap, |
| 195 | AD5380_REG_OFFSET(chan->address), |
| 196 | val << chan->scan_type.shift); |
| 197 | default: |
| 198 | break; |
| 199 | } |
| 200 | return -EINVAL; |
| 201 | } |
| 202 | |
| 203 | static int ad5380_read_raw(struct iio_dev *indio_dev, |
| 204 | struct iio_chan_spec const *chan, int *val, int *val2, long info) |
| 205 | { |
| 206 | struct ad5380_state *st = iio_priv(indio_dev); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 207 | int ret; |
| 208 | |
| 209 | switch (info) { |
Jonathan Cameron | 09f4eb4 | 2012-04-15 17:41:19 +0100 | [diff] [blame] | 210 | case IIO_CHAN_INFO_RAW: |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 211 | case IIO_CHAN_INFO_CALIBSCALE: |
| 212 | ret = regmap_read(st->regmap, ad5380_info_to_reg(chan, info), |
| 213 | val); |
| 214 | if (ret) |
| 215 | return ret; |
| 216 | *val >>= chan->scan_type.shift; |
| 217 | return IIO_VAL_INT; |
| 218 | case IIO_CHAN_INFO_CALIBBIAS: |
| 219 | ret = regmap_read(st->regmap, AD5380_REG_OFFSET(chan->address), |
| 220 | val); |
| 221 | if (ret) |
| 222 | return ret; |
| 223 | *val >>= chan->scan_type.shift; |
| 224 | val -= (1 << chan->scan_type.realbits) / 2; |
| 225 | return IIO_VAL_INT; |
| 226 | case IIO_CHAN_INFO_SCALE: |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 227 | *val = 2 * st->vref; |
| 228 | *val2 = chan->scan_type.realbits; |
| 229 | return IIO_VAL_FRACTIONAL_LOG2; |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 230 | default: |
| 231 | break; |
| 232 | } |
| 233 | |
| 234 | return -EINVAL; |
| 235 | } |
| 236 | |
| 237 | static const struct iio_info ad5380_info = { |
| 238 | .read_raw = ad5380_read_raw, |
| 239 | .write_raw = ad5380_write_raw, |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 240 | .driver_module = THIS_MODULE, |
| 241 | }; |
| 242 | |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 243 | static struct iio_chan_spec_ext_info ad5380_ext_info[] = { |
| 244 | { |
| 245 | .name = "powerdown", |
| 246 | .read = ad5380_read_dac_powerdown, |
| 247 | .write = ad5380_write_dac_powerdown, |
Jonathan Cameron | 3704432 | 2013-09-08 14:57:00 +0100 | [diff] [blame] | 248 | .shared = IIO_SEPARATE, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 249 | }, |
Jonathan Cameron | 3704432 | 2013-09-08 14:57:00 +0100 | [diff] [blame] | 250 | IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE, |
| 251 | &ad5380_powerdown_mode_enum), |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 252 | IIO_ENUM_AVAILABLE("powerdown_mode", &ad5380_powerdown_mode_enum), |
| 253 | { }, |
| 254 | }; |
| 255 | |
| 256 | #define AD5380_CHANNEL(_bits) { \ |
| 257 | .type = IIO_VOLTAGE, \ |
| 258 | .indexed = 1, \ |
| 259 | .output = 1, \ |
Jonathan Cameron | c69e139 | 2013-02-27 19:09:55 +0000 | [diff] [blame] | 260 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ |
| 261 | BIT(IIO_CHAN_INFO_CALIBSCALE) | \ |
| 262 | BIT(IIO_CHAN_INFO_CALIBBIAS), \ |
| 263 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 264 | .scan_type = IIO_ST('u', (_bits), 16, 14 - (_bits)), \ |
| 265 | .ext_info = ad5380_ext_info, \ |
| 266 | } |
| 267 | |
| 268 | static const struct ad5380_chip_info ad5380_chip_info_tbl[] = { |
| 269 | [ID_AD5380_3] = { |
| 270 | .channel_template = AD5380_CHANNEL(14), |
| 271 | .num_channels = 40, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 272 | .int_vref = 1250, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 273 | }, |
| 274 | [ID_AD5380_5] = { |
| 275 | .channel_template = AD5380_CHANNEL(14), |
| 276 | .num_channels = 40, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 277 | .int_vref = 2500, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 278 | }, |
| 279 | [ID_AD5381_3] = { |
| 280 | .channel_template = AD5380_CHANNEL(12), |
| 281 | .num_channels = 16, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 282 | .int_vref = 1250, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 283 | }, |
| 284 | [ID_AD5381_5] = { |
| 285 | .channel_template = AD5380_CHANNEL(12), |
| 286 | .num_channels = 16, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 287 | .int_vref = 2500, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 288 | }, |
| 289 | [ID_AD5382_3] = { |
| 290 | .channel_template = AD5380_CHANNEL(14), |
| 291 | .num_channels = 32, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 292 | .int_vref = 1250, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 293 | }, |
| 294 | [ID_AD5382_5] = { |
| 295 | .channel_template = AD5380_CHANNEL(14), |
| 296 | .num_channels = 32, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 297 | .int_vref = 2500, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 298 | }, |
| 299 | [ID_AD5383_3] = { |
| 300 | .channel_template = AD5380_CHANNEL(12), |
| 301 | .num_channels = 32, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 302 | .int_vref = 1250, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 303 | }, |
| 304 | [ID_AD5383_5] = { |
| 305 | .channel_template = AD5380_CHANNEL(12), |
| 306 | .num_channels = 32, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 307 | .int_vref = 2500, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 308 | }, |
| 309 | [ID_AD5390_3] = { |
| 310 | .channel_template = AD5380_CHANNEL(14), |
| 311 | .num_channels = 16, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 312 | .int_vref = 1250, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 313 | }, |
| 314 | [ID_AD5390_5] = { |
| 315 | .channel_template = AD5380_CHANNEL(14), |
| 316 | .num_channels = 16, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 317 | .int_vref = 2500, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 318 | }, |
| 319 | [ID_AD5391_3] = { |
| 320 | .channel_template = AD5380_CHANNEL(12), |
| 321 | .num_channels = 16, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 322 | .int_vref = 1250, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 323 | }, |
| 324 | [ID_AD5391_5] = { |
| 325 | .channel_template = AD5380_CHANNEL(12), |
| 326 | .num_channels = 16, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 327 | .int_vref = 2500, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 328 | }, |
| 329 | [ID_AD5392_3] = { |
| 330 | .channel_template = AD5380_CHANNEL(14), |
| 331 | .num_channels = 8, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 332 | .int_vref = 1250, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 333 | }, |
| 334 | [ID_AD5392_5] = { |
| 335 | .channel_template = AD5380_CHANNEL(14), |
| 336 | .num_channels = 8, |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 337 | .int_vref = 2500, |
Lars-Peter Clausen | 868e0862 | 2012-06-04 11:36:14 +0200 | [diff] [blame] | 338 | }, |
| 339 | }; |
| 340 | |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 341 | static int ad5380_alloc_channels(struct iio_dev *indio_dev) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 342 | { |
| 343 | struct ad5380_state *st = iio_priv(indio_dev); |
| 344 | struct iio_chan_spec *channels; |
| 345 | unsigned int i; |
| 346 | |
Axel Lin | 09f993e | 2012-02-11 09:00:48 +0800 | [diff] [blame] | 347 | channels = kcalloc(st->chip_info->num_channels, |
| 348 | sizeof(struct iio_chan_spec), GFP_KERNEL); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 349 | |
| 350 | if (!channels) |
| 351 | return -ENOMEM; |
| 352 | |
| 353 | for (i = 0; i < st->chip_info->num_channels; ++i) { |
| 354 | channels[i] = st->chip_info->channel_template; |
| 355 | channels[i].channel = i; |
| 356 | channels[i].address = i; |
| 357 | } |
| 358 | |
| 359 | indio_dev->channels = channels; |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 364 | static int ad5380_probe(struct device *dev, struct regmap *regmap, |
| 365 | enum ad5380_type type, const char *name) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 366 | { |
| 367 | struct iio_dev *indio_dev; |
| 368 | struct ad5380_state *st; |
| 369 | unsigned int ctrl = 0; |
| 370 | int ret; |
| 371 | |
Sachin Kamat | c815ad3 | 2013-08-19 12:38:00 +0100 | [diff] [blame] | 372 | indio_dev = devm_iio_device_alloc(dev, sizeof(*st)); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 373 | if (indio_dev == NULL) { |
| 374 | dev_err(dev, "Failed to allocate iio device\n"); |
Sachin Kamat | c815ad3 | 2013-08-19 12:38:00 +0100 | [diff] [blame] | 375 | return -ENOMEM; |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | st = iio_priv(indio_dev); |
| 379 | dev_set_drvdata(dev, indio_dev); |
| 380 | |
| 381 | st->chip_info = &ad5380_chip_info_tbl[type]; |
| 382 | st->regmap = regmap; |
| 383 | |
| 384 | indio_dev->dev.parent = dev; |
| 385 | indio_dev->name = name; |
| 386 | indio_dev->info = &ad5380_info; |
| 387 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 388 | indio_dev->num_channels = st->chip_info->num_channels; |
| 389 | |
| 390 | ret = ad5380_alloc_channels(indio_dev); |
| 391 | if (ret) { |
| 392 | dev_err(dev, "Failed to allocate channel spec: %d\n", ret); |
Sachin Kamat | c815ad3 | 2013-08-19 12:38:00 +0100 | [diff] [blame] | 393 | return ret; |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 394 | } |
| 395 | |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 396 | if (st->chip_info->int_vref == 2500) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 397 | ctrl |= AD5380_CTRL_INT_VREF_2V5; |
| 398 | |
Sachin Kamat | c815ad3 | 2013-08-19 12:38:00 +0100 | [diff] [blame] | 399 | st->vref_reg = devm_regulator_get(dev, "vref"); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 400 | if (!IS_ERR(st->vref_reg)) { |
| 401 | ret = regulator_enable(st->vref_reg); |
| 402 | if (ret) { |
| 403 | dev_err(dev, "Failed to enable vref regulators: %d\n", |
| 404 | ret); |
| 405 | goto error_free_reg; |
| 406 | } |
| 407 | |
Axel Lin | 272cc9c | 2012-12-14 07:48:00 +0000 | [diff] [blame] | 408 | ret = regulator_get_voltage(st->vref_reg); |
| 409 | if (ret < 0) |
| 410 | goto error_disable_reg; |
| 411 | |
Lars-Peter Clausen | 4f2c188 | 2013-09-28 10:31:00 +0100 | [diff] [blame^] | 412 | st->vref = ret / 1000; |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 413 | } else { |
| 414 | st->vref = st->chip_info->int_vref; |
| 415 | ctrl |= AD5380_CTRL_INT_VREF_EN; |
| 416 | } |
| 417 | |
| 418 | ret = regmap_write(st->regmap, AD5380_REG_SF_CTRL, ctrl); |
| 419 | if (ret) { |
| 420 | dev_err(dev, "Failed to write to device: %d\n", ret); |
| 421 | goto error_disable_reg; |
| 422 | } |
| 423 | |
| 424 | ret = iio_device_register(indio_dev); |
| 425 | if (ret) { |
| 426 | dev_err(dev, "Failed to register iio device: %d\n", ret); |
| 427 | goto error_disable_reg; |
| 428 | } |
| 429 | |
| 430 | return 0; |
| 431 | |
| 432 | error_disable_reg: |
| 433 | if (!IS_ERR(st->vref_reg)) |
| 434 | regulator_disable(st->vref_reg); |
| 435 | error_free_reg: |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 436 | kfree(indio_dev->channels); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 437 | |
| 438 | return ret; |
| 439 | } |
| 440 | |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 441 | static int ad5380_remove(struct device *dev) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 442 | { |
| 443 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 444 | struct ad5380_state *st = iio_priv(indio_dev); |
| 445 | |
| 446 | iio_device_unregister(indio_dev); |
| 447 | |
| 448 | kfree(indio_dev->channels); |
| 449 | |
| 450 | if (!IS_ERR(st->vref_reg)) { |
| 451 | regulator_disable(st->vref_reg); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 452 | } |
| 453 | |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | static bool ad5380_reg_false(struct device *dev, unsigned int reg) |
| 458 | { |
| 459 | return false; |
| 460 | } |
| 461 | |
| 462 | static const struct regmap_config ad5380_regmap_config = { |
| 463 | .reg_bits = 10, |
| 464 | .val_bits = 14, |
| 465 | |
| 466 | .max_register = AD5380_REG_DATA(40), |
| 467 | .cache_type = REGCACHE_RBTREE, |
| 468 | |
| 469 | .volatile_reg = ad5380_reg_false, |
| 470 | .readable_reg = ad5380_reg_false, |
| 471 | }; |
| 472 | |
| 473 | #if IS_ENABLED(CONFIG_SPI_MASTER) |
| 474 | |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 475 | static int ad5380_spi_probe(struct spi_device *spi) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 476 | { |
| 477 | const struct spi_device_id *id = spi_get_device_id(spi); |
| 478 | struct regmap *regmap; |
| 479 | |
Axel Lin | d03fcfe | 2012-06-15 16:40:21 +0800 | [diff] [blame] | 480 | regmap = devm_regmap_init_spi(spi, &ad5380_regmap_config); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 481 | |
| 482 | if (IS_ERR(regmap)) |
| 483 | return PTR_ERR(regmap); |
| 484 | |
| 485 | return ad5380_probe(&spi->dev, regmap, id->driver_data, id->name); |
| 486 | } |
| 487 | |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 488 | static int ad5380_spi_remove(struct spi_device *spi) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 489 | { |
| 490 | return ad5380_remove(&spi->dev); |
| 491 | } |
| 492 | |
| 493 | static const struct spi_device_id ad5380_spi_ids[] = { |
| 494 | { "ad5380-3", ID_AD5380_3 }, |
| 495 | { "ad5380-5", ID_AD5380_5 }, |
| 496 | { "ad5381-3", ID_AD5381_3 }, |
| 497 | { "ad5381-5", ID_AD5381_5 }, |
| 498 | { "ad5382-3", ID_AD5382_3 }, |
| 499 | { "ad5382-5", ID_AD5382_5 }, |
| 500 | { "ad5383-3", ID_AD5383_3 }, |
| 501 | { "ad5383-5", ID_AD5383_5 }, |
| 502 | { "ad5384-3", ID_AD5380_3 }, |
| 503 | { "ad5384-5", ID_AD5380_5 }, |
| 504 | { "ad5390-3", ID_AD5390_3 }, |
| 505 | { "ad5390-5", ID_AD5390_5 }, |
| 506 | { "ad5391-3", ID_AD5391_3 }, |
| 507 | { "ad5391-5", ID_AD5391_5 }, |
| 508 | { "ad5392-3", ID_AD5392_3 }, |
| 509 | { "ad5392-5", ID_AD5392_5 }, |
| 510 | { } |
| 511 | }; |
| 512 | MODULE_DEVICE_TABLE(spi, ad5380_spi_ids); |
| 513 | |
| 514 | static struct spi_driver ad5380_spi_driver = { |
| 515 | .driver = { |
| 516 | .name = "ad5380", |
| 517 | .owner = THIS_MODULE, |
| 518 | }, |
| 519 | .probe = ad5380_spi_probe, |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 520 | .remove = ad5380_spi_remove, |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 521 | .id_table = ad5380_spi_ids, |
| 522 | }; |
| 523 | |
| 524 | static inline int ad5380_spi_register_driver(void) |
| 525 | { |
| 526 | return spi_register_driver(&ad5380_spi_driver); |
| 527 | } |
| 528 | |
| 529 | static inline void ad5380_spi_unregister_driver(void) |
| 530 | { |
| 531 | spi_unregister_driver(&ad5380_spi_driver); |
| 532 | } |
| 533 | |
| 534 | #else |
| 535 | |
| 536 | static inline int ad5380_spi_register_driver(void) |
| 537 | { |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | static inline void ad5380_spi_unregister_driver(void) |
| 542 | { |
| 543 | } |
| 544 | |
| 545 | #endif |
| 546 | |
| 547 | #if IS_ENABLED(CONFIG_I2C) |
| 548 | |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 549 | static int ad5380_i2c_probe(struct i2c_client *i2c, |
| 550 | const struct i2c_device_id *id) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 551 | { |
| 552 | struct regmap *regmap; |
| 553 | |
Axel Lin | d03fcfe | 2012-06-15 16:40:21 +0800 | [diff] [blame] | 554 | regmap = devm_regmap_init_i2c(i2c, &ad5380_regmap_config); |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 555 | |
| 556 | if (IS_ERR(regmap)) |
| 557 | return PTR_ERR(regmap); |
| 558 | |
| 559 | return ad5380_probe(&i2c->dev, regmap, id->driver_data, id->name); |
| 560 | } |
| 561 | |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 562 | static int ad5380_i2c_remove(struct i2c_client *i2c) |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 563 | { |
| 564 | return ad5380_remove(&i2c->dev); |
| 565 | } |
| 566 | |
| 567 | static const struct i2c_device_id ad5380_i2c_ids[] = { |
| 568 | { "ad5380-3", ID_AD5380_3 }, |
| 569 | { "ad5380-5", ID_AD5380_5 }, |
| 570 | { "ad5381-3", ID_AD5381_3 }, |
| 571 | { "ad5381-5", ID_AD5381_5 }, |
| 572 | { "ad5382-3", ID_AD5382_3 }, |
| 573 | { "ad5382-5", ID_AD5382_5 }, |
| 574 | { "ad5383-3", ID_AD5383_3 }, |
| 575 | { "ad5383-5", ID_AD5383_5 }, |
| 576 | { "ad5384-3", ID_AD5380_3 }, |
| 577 | { "ad5384-5", ID_AD5380_5 }, |
| 578 | { "ad5390-3", ID_AD5390_3 }, |
| 579 | { "ad5390-5", ID_AD5390_5 }, |
| 580 | { "ad5391-3", ID_AD5391_3 }, |
| 581 | { "ad5391-5", ID_AD5391_5 }, |
| 582 | { "ad5392-3", ID_AD5392_3 }, |
| 583 | { "ad5392-5", ID_AD5392_5 }, |
| 584 | { } |
| 585 | }; |
| 586 | MODULE_DEVICE_TABLE(i2c, ad5380_i2c_ids); |
| 587 | |
| 588 | static struct i2c_driver ad5380_i2c_driver = { |
| 589 | .driver = { |
| 590 | .name = "ad5380", |
| 591 | .owner = THIS_MODULE, |
| 592 | }, |
| 593 | .probe = ad5380_i2c_probe, |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 594 | .remove = ad5380_i2c_remove, |
Lars-Peter Clausen | c03f2c5 | 2011-12-06 10:07:02 +0100 | [diff] [blame] | 595 | .id_table = ad5380_i2c_ids, |
| 596 | }; |
| 597 | |
| 598 | static inline int ad5380_i2c_register_driver(void) |
| 599 | { |
| 600 | return i2c_add_driver(&ad5380_i2c_driver); |
| 601 | } |
| 602 | |
| 603 | static inline void ad5380_i2c_unregister_driver(void) |
| 604 | { |
| 605 | i2c_del_driver(&ad5380_i2c_driver); |
| 606 | } |
| 607 | |
| 608 | #else |
| 609 | |
| 610 | static inline int ad5380_i2c_register_driver(void) |
| 611 | { |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | static inline void ad5380_i2c_unregister_driver(void) |
| 616 | { |
| 617 | } |
| 618 | |
| 619 | #endif |
| 620 | |
| 621 | static int __init ad5380_spi_init(void) |
| 622 | { |
| 623 | int ret; |
| 624 | |
| 625 | ret = ad5380_spi_register_driver(); |
| 626 | if (ret) |
| 627 | return ret; |
| 628 | |
| 629 | ret = ad5380_i2c_register_driver(); |
| 630 | if (ret) { |
| 631 | ad5380_spi_unregister_driver(); |
| 632 | return ret; |
| 633 | } |
| 634 | |
| 635 | return 0; |
| 636 | } |
| 637 | module_init(ad5380_spi_init); |
| 638 | |
| 639 | static void __exit ad5380_spi_exit(void) |
| 640 | { |
| 641 | ad5380_i2c_unregister_driver(); |
| 642 | ad5380_spi_unregister_driver(); |
| 643 | |
| 644 | } |
| 645 | module_exit(ad5380_spi_exit); |
| 646 | |
| 647 | MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); |
| 648 | MODULE_DESCRIPTION("Analog Devices AD5380/81/82/83/84/90/91/92 DAC"); |
| 649 | MODULE_LICENSE("GPL v2"); |