Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 1 | /* |
| 2 | * AD5686R, AD5685R, AD5684R Digital to analog converters driver |
| 3 | * |
| 4 | * Copyright 2011 Analog Devices Inc. |
| 5 | * |
| 6 | * Licensed under the GPL-2. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/interrupt.h> |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 10 | #include <linux/fs.h> |
| 11 | #include <linux/device.h> |
Paul Gortmaker | 99c9785 | 2011-07-03 15:49:50 -0400 | [diff] [blame] | 12 | #include <linux/module.h> |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 13 | #include <linux/kernel.h> |
| 14 | #include <linux/spi/spi.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/sysfs.h> |
| 17 | #include <linux/regulator/consumer.h> |
| 18 | |
| 19 | #include "../iio.h" |
| 20 | #include "../sysfs.h" |
| 21 | #include "dac.h" |
| 22 | |
| 23 | #define AD5686_DAC_CHANNELS 4 |
| 24 | |
| 25 | #define AD5686_ADDR(x) ((x) << 16) |
| 26 | #define AD5686_CMD(x) ((x) << 20) |
| 27 | |
Lars-Peter Clausen | a45186c0 | 2011-10-07 10:31:42 +0200 | [diff] [blame] | 28 | #define AD5686_ADDR_DAC(chan) (0x1 << (chan)) |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 29 | #define AD5686_ADDR_ALL_DAC 0xF |
| 30 | |
| 31 | #define AD5686_CMD_NOOP 0x0 |
| 32 | #define AD5686_CMD_WRITE_INPUT_N 0x1 |
| 33 | #define AD5686_CMD_UPDATE_DAC_N 0x2 |
| 34 | #define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3 |
| 35 | #define AD5686_CMD_POWERDOWN_DAC 0x4 |
| 36 | #define AD5686_CMD_LDAC_MASK 0x5 |
| 37 | #define AD5686_CMD_RESET 0x6 |
| 38 | #define AD5686_CMD_INTERNAL_REFER_SETUP 0x7 |
| 39 | #define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8 |
| 40 | #define AD5686_CMD_READBACK_ENABLE 0x9 |
| 41 | |
| 42 | #define AD5686_LDAC_PWRDN_NONE 0x0 |
| 43 | #define AD5686_LDAC_PWRDN_1K 0x1 |
| 44 | #define AD5686_LDAC_PWRDN_100K 0x2 |
| 45 | #define AD5686_LDAC_PWRDN_3STATE 0x3 |
| 46 | |
| 47 | /** |
| 48 | * struct ad5686_chip_info - chip specific information |
| 49 | * @int_vref_mv: AD5620/40/60: the internal reference voltage |
| 50 | * @channel: channel specification |
| 51 | */ |
| 52 | |
| 53 | struct ad5686_chip_info { |
| 54 | u16 int_vref_mv; |
| 55 | struct iio_chan_spec channel[AD5686_DAC_CHANNELS]; |
| 56 | }; |
| 57 | |
| 58 | /** |
| 59 | * struct ad5446_state - driver instance specific data |
| 60 | * @spi: spi_device |
| 61 | * @chip_info: chip model specific constants, available modes etc |
| 62 | * @reg: supply regulator |
| 63 | * @vref_mv: actual reference voltage used |
| 64 | * @pwr_down_mask: power down mask |
| 65 | * @pwr_down_mode: current power down mode |
| 66 | * @data: spi transfer buffers |
| 67 | */ |
| 68 | |
| 69 | struct ad5686_state { |
| 70 | struct spi_device *spi; |
| 71 | const struct ad5686_chip_info *chip_info; |
| 72 | struct regulator *reg; |
| 73 | unsigned short vref_mv; |
| 74 | unsigned pwr_down_mask; |
| 75 | unsigned pwr_down_mode; |
| 76 | /* |
| 77 | * DMA (thus cache coherency maintenance) requires the |
| 78 | * transfer buffers to live in their own cache lines. |
| 79 | */ |
| 80 | |
| 81 | union { |
| 82 | u32 d32; |
| 83 | u8 d8[4]; |
| 84 | } data[3] ____cacheline_aligned; |
| 85 | }; |
| 86 | |
| 87 | /** |
| 88 | * ad5686_supported_device_ids: |
| 89 | */ |
| 90 | |
| 91 | enum ad5686_supported_device_ids { |
| 92 | ID_AD5684, |
| 93 | ID_AD5685, |
| 94 | ID_AD5686, |
| 95 | }; |
Jonathan Cameron | c6fc806 | 2011-09-02 17:14:34 +0100 | [diff] [blame] | 96 | #define AD5868_CHANNEL(chan, bits, shift) { \ |
| 97 | .type = IIO_VOLTAGE, \ |
| 98 | .indexed = 1, \ |
| 99 | .output = 1, \ |
| 100 | .channel = chan, \ |
Jonathan Cameron | c8a9f80 | 2011-10-26 17:41:36 +0100 | [diff] [blame] | 101 | .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \ |
Lars-Peter Clausen | a45186c0 | 2011-10-07 10:31:42 +0200 | [diff] [blame] | 102 | .address = AD5686_ADDR_DAC(chan), \ |
Jonathan Cameron | c6fc806 | 2011-09-02 17:14:34 +0100 | [diff] [blame] | 103 | .scan_type = IIO_ST('u', bits, 16, shift) \ |
| 104 | } |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 105 | static const struct ad5686_chip_info ad5686_chip_info_tbl[] = { |
| 106 | [ID_AD5684] = { |
Jonathan Cameron | c6fc806 | 2011-09-02 17:14:34 +0100 | [diff] [blame] | 107 | .channel[0] = AD5868_CHANNEL(0, 12, 4), |
| 108 | .channel[1] = AD5868_CHANNEL(1, 12, 4), |
| 109 | .channel[2] = AD5868_CHANNEL(2, 12, 4), |
| 110 | .channel[3] = AD5868_CHANNEL(3, 12, 4), |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 111 | .int_vref_mv = 2500, |
| 112 | }, |
| 113 | [ID_AD5685] = { |
Jonathan Cameron | c6fc806 | 2011-09-02 17:14:34 +0100 | [diff] [blame] | 114 | .channel[0] = AD5868_CHANNEL(0, 14, 2), |
| 115 | .channel[1] = AD5868_CHANNEL(1, 14, 2), |
| 116 | .channel[2] = AD5868_CHANNEL(2, 14, 2), |
| 117 | .channel[3] = AD5868_CHANNEL(3, 14, 2), |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 118 | .int_vref_mv = 2500, |
| 119 | }, |
| 120 | [ID_AD5686] = { |
Jonathan Cameron | c6fc806 | 2011-09-02 17:14:34 +0100 | [diff] [blame] | 121 | .channel[0] = AD5868_CHANNEL(0, 16, 0), |
| 122 | .channel[1] = AD5868_CHANNEL(1, 16, 0), |
| 123 | .channel[2] = AD5868_CHANNEL(2, 16, 0), |
| 124 | .channel[3] = AD5868_CHANNEL(3, 16, 0), |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 125 | .int_vref_mv = 2500, |
| 126 | }, |
| 127 | }; |
| 128 | |
| 129 | static int ad5686_spi_write(struct ad5686_state *st, |
| 130 | u8 cmd, u8 addr, u16 val, u8 shift) |
| 131 | { |
| 132 | val <<= shift; |
| 133 | |
| 134 | st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | |
| 135 | AD5686_ADDR(addr) | |
| 136 | val); |
| 137 | |
| 138 | return spi_write(st->spi, &st->data[0].d8[1], 3); |
| 139 | } |
| 140 | |
| 141 | static int ad5686_spi_read(struct ad5686_state *st, u8 addr) |
| 142 | { |
| 143 | struct spi_transfer t[] = { |
| 144 | { |
| 145 | .tx_buf = &st->data[0].d8[1], |
| 146 | .len = 3, |
| 147 | .cs_change = 1, |
| 148 | }, { |
| 149 | .tx_buf = &st->data[1].d8[1], |
| 150 | .rx_buf = &st->data[2].d8[1], |
| 151 | .len = 3, |
| 152 | }, |
| 153 | }; |
| 154 | struct spi_message m; |
| 155 | int ret; |
| 156 | |
| 157 | spi_message_init(&m); |
| 158 | spi_message_add_tail(&t[0], &m); |
| 159 | spi_message_add_tail(&t[1], &m); |
| 160 | |
| 161 | st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) | |
| 162 | AD5686_ADDR(addr)); |
| 163 | st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); |
| 164 | |
| 165 | ret = spi_sync(st->spi, &m); |
| 166 | if (ret < 0) |
| 167 | return ret; |
| 168 | |
| 169 | return be32_to_cpu(st->data[2].d32); |
| 170 | } |
| 171 | |
| 172 | static ssize_t ad5686_read_powerdown_mode(struct device *dev, |
| 173 | struct device_attribute *attr, char *buf) |
| 174 | { |
| 175 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 176 | struct ad5686_state *st = iio_priv(indio_dev); |
| 177 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 178 | |
| 179 | char mode[][15] = {"", "1kohm_to_gnd", "100kohm_to_gnd", "three_state"}; |
| 180 | |
| 181 | return sprintf(buf, "%s\n", mode[(st->pwr_down_mode >> |
| 182 | (this_attr->address * 2)) & 0x3]); |
| 183 | } |
| 184 | |
| 185 | static ssize_t ad5686_write_powerdown_mode(struct device *dev, |
| 186 | struct device_attribute *attr, |
| 187 | const char *buf, size_t len) |
| 188 | { |
| 189 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 190 | struct ad5686_state *st = iio_priv(indio_dev); |
| 191 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 192 | unsigned mode; |
| 193 | |
| 194 | if (sysfs_streq(buf, "1kohm_to_gnd")) |
| 195 | mode = AD5686_LDAC_PWRDN_1K; |
| 196 | else if (sysfs_streq(buf, "100kohm_to_gnd")) |
| 197 | mode = AD5686_LDAC_PWRDN_100K; |
| 198 | else if (sysfs_streq(buf, "three_state")) |
| 199 | mode = AD5686_LDAC_PWRDN_3STATE; |
| 200 | else |
| 201 | return -EINVAL; |
| 202 | |
| 203 | st->pwr_down_mode &= ~(0x3 << (this_attr->address * 2)); |
| 204 | st->pwr_down_mode |= (mode << (this_attr->address * 2)); |
| 205 | |
| 206 | return len; |
| 207 | } |
| 208 | |
| 209 | static ssize_t ad5686_read_dac_powerdown(struct device *dev, |
| 210 | struct device_attribute *attr, |
| 211 | char *buf) |
| 212 | { |
| 213 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 214 | struct ad5686_state *st = iio_priv(indio_dev); |
| 215 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 216 | |
| 217 | return sprintf(buf, "%d\n", !!(st->pwr_down_mask & |
| 218 | (0x3 << (this_attr->address * 2)))); |
| 219 | } |
| 220 | |
| 221 | static ssize_t ad5686_write_dac_powerdown(struct device *dev, |
| 222 | struct device_attribute *attr, |
| 223 | const char *buf, size_t len) |
| 224 | { |
| 225 | bool readin; |
| 226 | int ret; |
| 227 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| 228 | struct ad5686_state *st = iio_priv(indio_dev); |
| 229 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 230 | |
| 231 | ret = strtobool(buf, &readin); |
| 232 | if (ret) |
| 233 | return ret; |
| 234 | |
| 235 | if (readin == true) |
| 236 | st->pwr_down_mask |= (0x3 << (this_attr->address * 2)); |
| 237 | else |
| 238 | st->pwr_down_mask &= ~(0x3 << (this_attr->address * 2)); |
| 239 | |
| 240 | ret = ad5686_spi_write(st, AD5686_CMD_POWERDOWN_DAC, 0, |
| 241 | st->pwr_down_mask & st->pwr_down_mode, 0); |
| 242 | |
| 243 | return ret ? ret : len; |
| 244 | } |
| 245 | |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 246 | static IIO_CONST_ATTR(out_voltage_powerdown_mode_available, |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 247 | "1kohm_to_gnd 100kohm_to_gnd three_state"); |
| 248 | |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 249 | #define IIO_DEV_ATTR_DAC_POWERDOWN_MODE(_num) \ |
| 250 | IIO_DEVICE_ATTR(out_voltage##_num##_powerdown_mode, \ |
| 251 | S_IRUGO | S_IWUSR, \ |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 252 | ad5686_read_powerdown_mode, \ |
| 253 | ad5686_write_powerdown_mode, _num) |
| 254 | |
| 255 | static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(0); |
| 256 | static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(1); |
| 257 | static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(2); |
| 258 | static IIO_DEV_ATTR_DAC_POWERDOWN_MODE(3); |
| 259 | |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 260 | #define IIO_DEV_ATTR_DAC_POWERDOWN(_num) \ |
| 261 | IIO_DEVICE_ATTR(out_voltage##_num##_powerdown, \ |
| 262 | S_IRUGO | S_IWUSR, \ |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 263 | ad5686_read_dac_powerdown, \ |
| 264 | ad5686_write_dac_powerdown, _num) |
| 265 | |
| 266 | static IIO_DEV_ATTR_DAC_POWERDOWN(0); |
| 267 | static IIO_DEV_ATTR_DAC_POWERDOWN(1); |
| 268 | static IIO_DEV_ATTR_DAC_POWERDOWN(2); |
| 269 | static IIO_DEV_ATTR_DAC_POWERDOWN(3); |
| 270 | |
| 271 | static struct attribute *ad5686_attributes[] = { |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 272 | &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr, |
| 273 | &iio_dev_attr_out_voltage1_powerdown.dev_attr.attr, |
| 274 | &iio_dev_attr_out_voltage2_powerdown.dev_attr.attr, |
| 275 | &iio_dev_attr_out_voltage3_powerdown.dev_attr.attr, |
| 276 | &iio_dev_attr_out_voltage0_powerdown_mode.dev_attr.attr, |
| 277 | &iio_dev_attr_out_voltage1_powerdown_mode.dev_attr.attr, |
| 278 | &iio_dev_attr_out_voltage2_powerdown_mode.dev_attr.attr, |
| 279 | &iio_dev_attr_out_voltage3_powerdown_mode.dev_attr.attr, |
| 280 | &iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr, |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 281 | NULL, |
| 282 | }; |
| 283 | |
| 284 | static const struct attribute_group ad5686_attribute_group = { |
| 285 | .attrs = ad5686_attributes, |
| 286 | }; |
| 287 | |
| 288 | static int ad5686_read_raw(struct iio_dev *indio_dev, |
| 289 | struct iio_chan_spec const *chan, |
| 290 | int *val, |
| 291 | int *val2, |
| 292 | long m) |
| 293 | { |
| 294 | struct ad5686_state *st = iio_priv(indio_dev); |
| 295 | unsigned long scale_uv; |
| 296 | int ret; |
| 297 | |
| 298 | switch (m) { |
| 299 | case 0: |
| 300 | mutex_lock(&indio_dev->mlock); |
| 301 | ret = ad5686_spi_read(st, chan->address); |
| 302 | mutex_unlock(&indio_dev->mlock); |
| 303 | if (ret < 0) |
| 304 | return ret; |
| 305 | *val = ret; |
| 306 | return IIO_VAL_INT; |
| 307 | break; |
Jonathan Cameron | c8a9f80 | 2011-10-26 17:41:36 +0100 | [diff] [blame] | 308 | case IIO_CHAN_INFO_SCALE: |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 309 | scale_uv = (st->vref_mv * 100000) |
| 310 | >> (chan->scan_type.realbits); |
| 311 | *val = scale_uv / 100000; |
| 312 | *val2 = (scale_uv % 100000) * 10; |
| 313 | return IIO_VAL_INT_PLUS_MICRO; |
| 314 | |
| 315 | } |
| 316 | return -EINVAL; |
| 317 | } |
| 318 | |
| 319 | static int ad5686_write_raw(struct iio_dev *indio_dev, |
| 320 | struct iio_chan_spec const *chan, |
| 321 | int val, |
| 322 | int val2, |
| 323 | long mask) |
| 324 | { |
| 325 | struct ad5686_state *st = iio_priv(indio_dev); |
| 326 | int ret; |
| 327 | |
| 328 | switch (mask) { |
| 329 | case 0: |
Lars-Peter Clausen | cd8eca6 | 2011-10-19 17:51:28 +0200 | [diff] [blame] | 330 | if (val > (1 << chan->scan_type.realbits) || val < 0) |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 331 | return -EINVAL; |
| 332 | |
| 333 | mutex_lock(&indio_dev->mlock); |
| 334 | ret = ad5686_spi_write(st, |
| 335 | AD5686_CMD_WRITE_INPUT_N_UPDATE_N, |
| 336 | chan->address, |
| 337 | val, |
| 338 | chan->scan_type.shift); |
| 339 | mutex_unlock(&indio_dev->mlock); |
| 340 | break; |
| 341 | default: |
| 342 | ret = -EINVAL; |
| 343 | } |
| 344 | |
| 345 | return ret; |
| 346 | } |
| 347 | |
| 348 | static const struct iio_info ad5686_info = { |
| 349 | .read_raw = ad5686_read_raw, |
| 350 | .write_raw = ad5686_write_raw, |
| 351 | .attrs = &ad5686_attribute_group, |
| 352 | .driver_module = THIS_MODULE, |
| 353 | }; |
| 354 | |
| 355 | static int __devinit ad5686_probe(struct spi_device *spi) |
| 356 | { |
| 357 | struct ad5686_state *st; |
| 358 | struct iio_dev *indio_dev; |
| 359 | int ret, regdone = 0, voltage_uv = 0; |
| 360 | |
| 361 | indio_dev = iio_allocate_device(sizeof(*st)); |
| 362 | if (indio_dev == NULL) |
| 363 | return -ENOMEM; |
| 364 | |
| 365 | st = iio_priv(indio_dev); |
| 366 | spi_set_drvdata(spi, indio_dev); |
| 367 | |
| 368 | st->reg = regulator_get(&spi->dev, "vcc"); |
| 369 | if (!IS_ERR(st->reg)) { |
| 370 | ret = regulator_enable(st->reg); |
| 371 | if (ret) |
| 372 | goto error_put_reg; |
| 373 | |
| 374 | voltage_uv = regulator_get_voltage(st->reg); |
| 375 | } |
| 376 | |
| 377 | st->chip_info = |
| 378 | &ad5686_chip_info_tbl[spi_get_device_id(spi)->driver_data]; |
| 379 | |
| 380 | if (voltage_uv) |
| 381 | st->vref_mv = voltage_uv / 1000; |
| 382 | else |
| 383 | st->vref_mv = st->chip_info->int_vref_mv; |
| 384 | |
| 385 | st->spi = spi; |
| 386 | |
| 387 | indio_dev->dev.parent = &spi->dev; |
| 388 | indio_dev->name = spi_get_device_id(spi)->name; |
| 389 | indio_dev->info = &ad5686_info; |
| 390 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 391 | indio_dev->channels = st->chip_info->channel; |
| 392 | indio_dev->num_channels = AD5686_DAC_CHANNELS; |
| 393 | |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 394 | regdone = 1; |
| 395 | ret = ad5686_spi_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0, |
| 396 | !!voltage_uv, 0); |
| 397 | if (ret) |
| 398 | goto error_disable_reg; |
| 399 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 400 | ret = iio_device_register(indio_dev); |
| 401 | if (ret) |
| 402 | goto error_disable_reg; |
| 403 | |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 404 | return 0; |
| 405 | |
| 406 | error_disable_reg: |
| 407 | if (!IS_ERR(st->reg)) |
| 408 | regulator_disable(st->reg); |
| 409 | error_put_reg: |
| 410 | if (!IS_ERR(st->reg)) |
| 411 | regulator_put(st->reg); |
| 412 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 413 | iio_free_device(indio_dev); |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 414 | |
| 415 | return ret; |
| 416 | } |
| 417 | |
| 418 | static int __devexit ad5686_remove(struct spi_device *spi) |
| 419 | { |
| 420 | struct iio_dev *indio_dev = spi_get_drvdata(spi); |
| 421 | struct ad5686_state *st = iio_priv(indio_dev); |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 422 | |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 423 | iio_device_unregister(indio_dev); |
Jonathan Cameron | 26a5479 | 2011-08-30 12:41:19 +0100 | [diff] [blame] | 424 | if (!IS_ERR(st->reg)) { |
| 425 | regulator_disable(st->reg); |
| 426 | regulator_put(st->reg); |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 427 | } |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 428 | iio_free_device(indio_dev); |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 429 | |
| 430 | return 0; |
| 431 | } |
| 432 | |
| 433 | static const struct spi_device_id ad5686_id[] = { |
| 434 | {"ad5684", ID_AD5684}, |
| 435 | {"ad5685", ID_AD5685}, |
| 436 | {"ad5686", ID_AD5686}, |
| 437 | {} |
| 438 | }; |
Lars-Peter Clausen | 55e4390 | 2011-11-16 08:53:31 +0100 | [diff] [blame] | 439 | MODULE_DEVICE_TABLE(spi, ad5686_id); |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 440 | |
| 441 | static struct spi_driver ad5686_driver = { |
| 442 | .driver = { |
| 443 | .name = "ad5686", |
| 444 | .owner = THIS_MODULE, |
| 445 | }, |
| 446 | .probe = ad5686_probe, |
| 447 | .remove = __devexit_p(ad5686_remove), |
| 448 | .id_table = ad5686_id, |
| 449 | }; |
Lars-Peter Clausen | ae6ae6f | 2011-11-16 10:13:39 +0100 | [diff] [blame] | 450 | module_spi_driver(ad5686_driver); |
Michael Hennerich | c2f37c8 | 2011-06-10 15:40:49 +0200 | [diff] [blame] | 451 | |
| 452 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); |
| 453 | MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC"); |
| 454 | MODULE_LICENSE("GPL v2"); |