Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | * ADT7310 digital temperature sensor driver supporting ADT7310 |
| 3 | * |
| 4 | * Copyright 2010 Analog Devices Inc. |
| 5 | * |
| 6 | * Licensed under the GPL-2 or later. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/interrupt.h> |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 10 | #include <linux/device.h> |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/sysfs.h> |
| 14 | #include <linux/list.h> |
| 15 | #include <linux/spi/spi.h> |
Paul Gortmaker | 99c9785 | 2011-07-03 15:49:50 -0400 | [diff] [blame] | 16 | #include <linux/module.h> |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 17 | |
| 18 | #include "../iio.h" |
| 19 | #include "../sysfs.h" |
Jonathan Cameron | af5046a | 2011-10-26 17:41:32 +0100 | [diff] [blame^] | 20 | #include "../events.h" |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 21 | /* |
| 22 | * ADT7310 registers definition |
| 23 | */ |
| 24 | |
| 25 | #define ADT7310_STATUS 0 |
| 26 | #define ADT7310_CONFIG 1 |
| 27 | #define ADT7310_TEMPERATURE 2 |
| 28 | #define ADT7310_ID 3 |
| 29 | #define ADT7310_T_CRIT 4 |
| 30 | #define ADT7310_T_HYST 5 |
| 31 | #define ADT7310_T_ALARM_HIGH 6 |
| 32 | #define ADT7310_T_ALARM_LOW 7 |
| 33 | |
| 34 | /* |
| 35 | * ADT7310 status |
| 36 | */ |
| 37 | #define ADT7310_STAT_T_LOW 0x10 |
| 38 | #define ADT7310_STAT_T_HIGH 0x20 |
| 39 | #define ADT7310_STAT_T_CRIT 0x40 |
| 40 | #define ADT7310_STAT_NOT_RDY 0x80 |
| 41 | |
| 42 | /* |
| 43 | * ADT7310 config |
| 44 | */ |
| 45 | #define ADT7310_FAULT_QUEUE_MASK 0x3 |
| 46 | #define ADT7310_CT_POLARITY 0x4 |
| 47 | #define ADT7310_INT_POLARITY 0x8 |
| 48 | #define ADT7310_EVENT_MODE 0x10 |
| 49 | #define ADT7310_MODE_MASK 0x60 |
| 50 | #define ADT7310_ONESHOT 0x20 |
| 51 | #define ADT7310_SPS 0x40 |
| 52 | #define ADT7310_PD 0x60 |
| 53 | #define ADT7310_RESOLUTION 0x80 |
| 54 | |
| 55 | /* |
| 56 | * ADT7310 masks |
| 57 | */ |
| 58 | #define ADT7310_T16_VALUE_SIGN 0x8000 |
| 59 | #define ADT7310_T16_VALUE_FLOAT_OFFSET 7 |
| 60 | #define ADT7310_T16_VALUE_FLOAT_MASK 0x7F |
| 61 | #define ADT7310_T13_VALUE_SIGN 0x1000 |
| 62 | #define ADT7310_T13_VALUE_OFFSET 3 |
| 63 | #define ADT7310_T13_VALUE_FLOAT_OFFSET 4 |
| 64 | #define ADT7310_T13_VALUE_FLOAT_MASK 0xF |
| 65 | #define ADT7310_T_HYST_MASK 0xF |
| 66 | #define ADT7310_DEVICE_ID_MASK 0x7 |
| 67 | #define ADT7310_MANUFACTORY_ID_MASK 0xF8 |
| 68 | #define ADT7310_MANUFACTORY_ID_OFFSET 3 |
| 69 | |
| 70 | |
| 71 | #define ADT7310_CMD_REG_MASK 0x28 |
| 72 | #define ADT7310_CMD_REG_OFFSET 3 |
| 73 | #define ADT7310_CMD_READ 0x40 |
| 74 | #define ADT7310_CMD_CON_READ 0x4 |
| 75 | |
| 76 | #define ADT7310_IRQS 2 |
| 77 | |
| 78 | /* |
| 79 | * struct adt7310_chip_info - chip specifc information |
| 80 | */ |
| 81 | |
| 82 | struct adt7310_chip_info { |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 83 | struct spi_device *spi_dev; |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 84 | u8 config; |
| 85 | }; |
| 86 | |
| 87 | /* |
| 88 | * adt7310 register access by SPI |
| 89 | */ |
| 90 | |
| 91 | static int adt7310_spi_read_word(struct adt7310_chip_info *chip, u8 reg, u16 *data) |
| 92 | { |
| 93 | struct spi_device *spi_dev = chip->spi_dev; |
| 94 | u8 command = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; |
| 95 | int ret = 0; |
| 96 | |
| 97 | command |= ADT7310_CMD_READ; |
| 98 | ret = spi_write(spi_dev, &command, sizeof(command)); |
| 99 | if (ret < 0) { |
| 100 | dev_err(&spi_dev->dev, "SPI write command error\n"); |
| 101 | return ret; |
| 102 | } |
| 103 | |
| 104 | ret = spi_read(spi_dev, (u8 *)data, sizeof(*data)); |
| 105 | if (ret < 0) { |
| 106 | dev_err(&spi_dev->dev, "SPI read word error\n"); |
| 107 | return ret; |
| 108 | } |
| 109 | |
| 110 | *data = be16_to_cpu(*data); |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | static int adt7310_spi_write_word(struct adt7310_chip_info *chip, u8 reg, u16 data) |
| 116 | { |
| 117 | struct spi_device *spi_dev = chip->spi_dev; |
| 118 | u8 buf[3]; |
| 119 | int ret = 0; |
| 120 | |
| 121 | buf[0] = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; |
| 122 | buf[1] = (u8)(data >> 8); |
| 123 | buf[2] = (u8)(data & 0xFF); |
| 124 | |
| 125 | ret = spi_write(spi_dev, buf, 3); |
| 126 | if (ret < 0) { |
| 127 | dev_err(&spi_dev->dev, "SPI write word error\n"); |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | return ret; |
| 132 | } |
| 133 | |
| 134 | static int adt7310_spi_read_byte(struct adt7310_chip_info *chip, u8 reg, u8 *data) |
| 135 | { |
| 136 | struct spi_device *spi_dev = chip->spi_dev; |
| 137 | u8 command = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; |
| 138 | int ret = 0; |
| 139 | |
| 140 | command |= ADT7310_CMD_READ; |
| 141 | ret = spi_write(spi_dev, &command, sizeof(command)); |
| 142 | if (ret < 0) { |
| 143 | dev_err(&spi_dev->dev, "SPI write command error\n"); |
| 144 | return ret; |
| 145 | } |
| 146 | |
| 147 | ret = spi_read(spi_dev, data, sizeof(*data)); |
| 148 | if (ret < 0) { |
| 149 | dev_err(&spi_dev->dev, "SPI read byte error\n"); |
| 150 | return ret; |
| 151 | } |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | static int adt7310_spi_write_byte(struct adt7310_chip_info *chip, u8 reg, u8 data) |
| 157 | { |
| 158 | struct spi_device *spi_dev = chip->spi_dev; |
| 159 | u8 buf[2]; |
| 160 | int ret = 0; |
| 161 | |
| 162 | buf[0] = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; |
| 163 | buf[1] = data; |
| 164 | |
| 165 | ret = spi_write(spi_dev, buf, 2); |
| 166 | if (ret < 0) { |
| 167 | dev_err(&spi_dev->dev, "SPI write byte error\n"); |
| 168 | return ret; |
| 169 | } |
| 170 | |
| 171 | return ret; |
| 172 | } |
| 173 | |
| 174 | static ssize_t adt7310_show_mode(struct device *dev, |
| 175 | struct device_attribute *attr, |
| 176 | char *buf) |
| 177 | { |
| 178 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 179 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 180 | u8 config; |
| 181 | |
| 182 | config = chip->config & ADT7310_MODE_MASK; |
| 183 | |
| 184 | switch (config) { |
| 185 | case ADT7310_PD: |
| 186 | return sprintf(buf, "power-down\n"); |
| 187 | case ADT7310_ONESHOT: |
| 188 | return sprintf(buf, "one-shot\n"); |
| 189 | case ADT7310_SPS: |
| 190 | return sprintf(buf, "sps\n"); |
| 191 | default: |
| 192 | return sprintf(buf, "full\n"); |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | static ssize_t adt7310_store_mode(struct device *dev, |
| 197 | struct device_attribute *attr, |
| 198 | const char *buf, |
| 199 | size_t len) |
| 200 | { |
| 201 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 202 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 203 | u16 config; |
| 204 | int ret; |
| 205 | |
| 206 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| 207 | if (ret) |
| 208 | return -EIO; |
| 209 | |
| 210 | config = chip->config & (~ADT7310_MODE_MASK); |
| 211 | if (strcmp(buf, "power-down")) |
| 212 | config |= ADT7310_PD; |
| 213 | else if (strcmp(buf, "one-shot")) |
| 214 | config |= ADT7310_ONESHOT; |
| 215 | else if (strcmp(buf, "sps")) |
| 216 | config |= ADT7310_SPS; |
| 217 | |
| 218 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); |
| 219 | if (ret) |
| 220 | return -EIO; |
| 221 | |
| 222 | chip->config = config; |
| 223 | |
| 224 | return len; |
| 225 | } |
| 226 | |
| 227 | static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, |
| 228 | adt7310_show_mode, |
| 229 | adt7310_store_mode, |
| 230 | 0); |
| 231 | |
| 232 | static ssize_t adt7310_show_available_modes(struct device *dev, |
| 233 | struct device_attribute *attr, |
| 234 | char *buf) |
| 235 | { |
| 236 | return sprintf(buf, "full\none-shot\nsps\npower-down\n"); |
| 237 | } |
| 238 | |
| 239 | static IIO_DEVICE_ATTR(available_modes, S_IRUGO, adt7310_show_available_modes, NULL, 0); |
| 240 | |
| 241 | static ssize_t adt7310_show_resolution(struct device *dev, |
| 242 | struct device_attribute *attr, |
| 243 | char *buf) |
| 244 | { |
| 245 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 246 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 247 | int ret; |
| 248 | int bits; |
| 249 | |
| 250 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| 251 | if (ret) |
| 252 | return -EIO; |
| 253 | |
| 254 | if (chip->config & ADT7310_RESOLUTION) |
| 255 | bits = 16; |
| 256 | else |
| 257 | bits = 13; |
| 258 | |
| 259 | return sprintf(buf, "%d bits\n", bits); |
| 260 | } |
| 261 | |
| 262 | static ssize_t adt7310_store_resolution(struct device *dev, |
| 263 | struct device_attribute *attr, |
| 264 | const char *buf, |
| 265 | size_t len) |
| 266 | { |
| 267 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 268 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 269 | unsigned long data; |
| 270 | u16 config; |
| 271 | int ret; |
| 272 | |
| 273 | ret = strict_strtoul(buf, 10, &data); |
| 274 | if (ret) |
| 275 | return -EINVAL; |
| 276 | |
| 277 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| 278 | if (ret) |
| 279 | return -EIO; |
| 280 | |
| 281 | config = chip->config & (~ADT7310_RESOLUTION); |
| 282 | if (data) |
| 283 | config |= ADT7310_RESOLUTION; |
| 284 | |
| 285 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); |
| 286 | if (ret) |
| 287 | return -EIO; |
| 288 | |
| 289 | chip->config = config; |
| 290 | |
| 291 | return len; |
| 292 | } |
| 293 | |
| 294 | static IIO_DEVICE_ATTR(resolution, S_IRUGO | S_IWUSR, |
| 295 | adt7310_show_resolution, |
| 296 | adt7310_store_resolution, |
| 297 | 0); |
| 298 | |
| 299 | static ssize_t adt7310_show_id(struct device *dev, |
| 300 | struct device_attribute *attr, |
| 301 | char *buf) |
| 302 | { |
| 303 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 304 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 305 | u8 id; |
| 306 | int ret; |
| 307 | |
| 308 | ret = adt7310_spi_read_byte(chip, ADT7310_ID, &id); |
| 309 | if (ret) |
| 310 | return -EIO; |
| 311 | |
| 312 | return sprintf(buf, "device id: 0x%x\nmanufactory id: 0x%x\n", |
| 313 | id & ADT7310_DEVICE_ID_MASK, |
| 314 | (id & ADT7310_MANUFACTORY_ID_MASK) >> ADT7310_MANUFACTORY_ID_OFFSET); |
| 315 | } |
| 316 | |
| 317 | static IIO_DEVICE_ATTR(id, S_IRUGO | S_IWUSR, |
| 318 | adt7310_show_id, |
| 319 | NULL, |
| 320 | 0); |
| 321 | |
| 322 | static ssize_t adt7310_convert_temperature(struct adt7310_chip_info *chip, |
| 323 | u16 data, char *buf) |
| 324 | { |
| 325 | char sign = ' '; |
| 326 | |
| 327 | if (chip->config & ADT7310_RESOLUTION) { |
| 328 | if (data & ADT7310_T16_VALUE_SIGN) { |
| 329 | /* convert supplement to positive value */ |
| 330 | data = (u16)((ADT7310_T16_VALUE_SIGN << 1) - (u32)data); |
| 331 | sign = '-'; |
| 332 | } |
| 333 | return sprintf(buf, "%c%d.%.7d\n", sign, |
| 334 | (data >> ADT7310_T16_VALUE_FLOAT_OFFSET), |
| 335 | (data & ADT7310_T16_VALUE_FLOAT_MASK) * 78125); |
| 336 | } else { |
| 337 | if (data & ADT7310_T13_VALUE_SIGN) { |
| 338 | /* convert supplement to positive value */ |
| 339 | data >>= ADT7310_T13_VALUE_OFFSET; |
| 340 | data = (ADT7310_T13_VALUE_SIGN << 1) - data; |
| 341 | sign = '-'; |
| 342 | } |
| 343 | return sprintf(buf, "%c%d.%.4d\n", sign, |
| 344 | (data >> ADT7310_T13_VALUE_FLOAT_OFFSET), |
| 345 | (data & ADT7310_T13_VALUE_FLOAT_MASK) * 625); |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | static ssize_t adt7310_show_value(struct device *dev, |
| 350 | struct device_attribute *attr, |
| 351 | char *buf) |
| 352 | { |
| 353 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 354 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 355 | u8 status; |
| 356 | u16 data; |
| 357 | int ret, i = 0; |
| 358 | |
| 359 | do { |
| 360 | ret = adt7310_spi_read_byte(chip, ADT7310_STATUS, &status); |
| 361 | if (ret) |
| 362 | return -EIO; |
| 363 | i++; |
| 364 | if (i == 10000) |
| 365 | return -EIO; |
| 366 | } while (status & ADT7310_STAT_NOT_RDY); |
| 367 | |
| 368 | ret = adt7310_spi_read_word(chip, ADT7310_TEMPERATURE, &data); |
| 369 | if (ret) |
| 370 | return -EIO; |
| 371 | |
| 372 | return adt7310_convert_temperature(chip, data, buf); |
| 373 | } |
| 374 | |
| 375 | static IIO_DEVICE_ATTR(value, S_IRUGO, adt7310_show_value, NULL, 0); |
| 376 | |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 377 | static struct attribute *adt7310_attributes[] = { |
| 378 | &iio_dev_attr_available_modes.dev_attr.attr, |
| 379 | &iio_dev_attr_mode.dev_attr.attr, |
| 380 | &iio_dev_attr_resolution.dev_attr.attr, |
| 381 | &iio_dev_attr_id.dev_attr.attr, |
| 382 | &iio_dev_attr_value.dev_attr.attr, |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 383 | NULL, |
| 384 | }; |
| 385 | |
| 386 | static const struct attribute_group adt7310_attribute_group = { |
| 387 | .attrs = adt7310_attributes, |
| 388 | }; |
| 389 | |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 390 | static irqreturn_t adt7310_event_handler(int irq, void *private) |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 391 | { |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 392 | struct iio_dev *indio_dev = private; |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 393 | struct adt7310_chip_info *chip = iio_priv(indio_dev); |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 394 | s64 timestamp = iio_get_time_ns(); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 395 | u8 status; |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 396 | int ret; |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 397 | |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 398 | ret = adt7310_spi_read_byte(chip, ADT7310_STATUS, &status); |
| 399 | if (ret) |
| 400 | return ret; |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 401 | |
| 402 | if (status & ADT7310_STAT_T_HIGH) |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 403 | iio_push_event(indio_dev, |
Jonathan Cameron | e7a2c32 | 2011-05-18 14:42:16 +0100 | [diff] [blame] | 404 | IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, |
| 405 | IIO_EV_TYPE_THRESH, |
| 406 | IIO_EV_DIR_RISING), |
| 407 | timestamp); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 408 | if (status & ADT7310_STAT_T_LOW) |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 409 | iio_push_event(indio_dev, |
Jonathan Cameron | e7a2c32 | 2011-05-18 14:42:16 +0100 | [diff] [blame] | 410 | IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, |
| 411 | IIO_EV_TYPE_THRESH, |
| 412 | IIO_EV_DIR_FALLING), |
| 413 | timestamp); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 414 | if (status & ADT7310_STAT_T_CRIT) |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 415 | iio_push_event(indio_dev, |
Jonathan Cameron | e7a2c32 | 2011-05-18 14:42:16 +0100 | [diff] [blame] | 416 | IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, |
| 417 | IIO_EV_TYPE_THRESH, |
| 418 | IIO_EV_DIR_RISING), |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 419 | timestamp); |
| 420 | return IRQ_HANDLED; |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 421 | } |
| 422 | |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 423 | static ssize_t adt7310_show_event_mode(struct device *dev, |
| 424 | struct device_attribute *attr, |
| 425 | char *buf) |
| 426 | { |
| 427 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 428 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 429 | int ret; |
| 430 | |
| 431 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| 432 | if (ret) |
| 433 | return -EIO; |
| 434 | |
| 435 | if (chip->config & ADT7310_EVENT_MODE) |
| 436 | return sprintf(buf, "interrupt\n"); |
| 437 | else |
| 438 | return sprintf(buf, "comparator\n"); |
| 439 | } |
| 440 | |
| 441 | static ssize_t adt7310_set_event_mode(struct device *dev, |
| 442 | struct device_attribute *attr, |
| 443 | const char *buf, |
| 444 | size_t len) |
| 445 | { |
| 446 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 447 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 448 | u16 config; |
| 449 | int ret; |
| 450 | |
| 451 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| 452 | if (ret) |
| 453 | return -EIO; |
| 454 | |
| 455 | config = chip->config &= ~ADT7310_EVENT_MODE; |
| 456 | if (strcmp(buf, "comparator") != 0) |
| 457 | config |= ADT7310_EVENT_MODE; |
| 458 | |
| 459 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); |
| 460 | if (ret) |
| 461 | return -EIO; |
| 462 | |
| 463 | chip->config = config; |
| 464 | |
| 465 | return len; |
| 466 | } |
| 467 | |
| 468 | static ssize_t adt7310_show_available_event_modes(struct device *dev, |
| 469 | struct device_attribute *attr, |
| 470 | char *buf) |
| 471 | { |
| 472 | return sprintf(buf, "comparator\ninterrupt\n"); |
| 473 | } |
| 474 | |
| 475 | static ssize_t adt7310_show_fault_queue(struct device *dev, |
| 476 | struct device_attribute *attr, |
| 477 | char *buf) |
| 478 | { |
| 479 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 480 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 481 | int ret; |
| 482 | |
| 483 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| 484 | if (ret) |
| 485 | return -EIO; |
| 486 | |
| 487 | return sprintf(buf, "%d\n", chip->config & ADT7310_FAULT_QUEUE_MASK); |
| 488 | } |
| 489 | |
| 490 | static ssize_t adt7310_set_fault_queue(struct device *dev, |
| 491 | struct device_attribute *attr, |
| 492 | const char *buf, |
| 493 | size_t len) |
| 494 | { |
| 495 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 496 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 497 | unsigned long data; |
| 498 | int ret; |
| 499 | u8 config; |
| 500 | |
| 501 | ret = strict_strtoul(buf, 10, &data); |
| 502 | if (ret || data > 3) |
| 503 | return -EINVAL; |
| 504 | |
| 505 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| 506 | if (ret) |
| 507 | return -EIO; |
| 508 | |
| 509 | config = chip->config & ~ADT7310_FAULT_QUEUE_MASK; |
| 510 | config |= data; |
| 511 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); |
| 512 | if (ret) |
| 513 | return -EIO; |
| 514 | |
| 515 | chip->config = config; |
| 516 | |
| 517 | return len; |
| 518 | } |
| 519 | |
| 520 | static inline ssize_t adt7310_show_t_bound(struct device *dev, |
| 521 | struct device_attribute *attr, |
| 522 | u8 bound_reg, |
| 523 | char *buf) |
| 524 | { |
| 525 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 526 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 527 | u16 data; |
| 528 | int ret; |
| 529 | |
| 530 | ret = adt7310_spi_read_word(chip, bound_reg, &data); |
| 531 | if (ret) |
| 532 | return -EIO; |
| 533 | |
| 534 | return adt7310_convert_temperature(chip, data, buf); |
| 535 | } |
| 536 | |
| 537 | static inline ssize_t adt7310_set_t_bound(struct device *dev, |
| 538 | struct device_attribute *attr, |
| 539 | u8 bound_reg, |
| 540 | const char *buf, |
| 541 | size_t len) |
| 542 | { |
| 543 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 544 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 545 | long tmp1, tmp2; |
| 546 | u16 data; |
| 547 | char *pos; |
| 548 | int ret; |
| 549 | |
| 550 | pos = strchr(buf, '.'); |
| 551 | |
| 552 | ret = strict_strtol(buf, 10, &tmp1); |
| 553 | |
| 554 | if (ret || tmp1 > 127 || tmp1 < -128) |
| 555 | return -EINVAL; |
| 556 | |
| 557 | if (pos) { |
| 558 | len = strlen(pos); |
| 559 | |
| 560 | if (chip->config & ADT7310_RESOLUTION) { |
| 561 | if (len > ADT7310_T16_VALUE_FLOAT_OFFSET) |
| 562 | len = ADT7310_T16_VALUE_FLOAT_OFFSET; |
| 563 | pos[len] = 0; |
| 564 | ret = strict_strtol(pos, 10, &tmp2); |
| 565 | |
| 566 | if (!ret) |
| 567 | tmp2 = (tmp2 / 78125) * 78125; |
| 568 | } else { |
| 569 | if (len > ADT7310_T13_VALUE_FLOAT_OFFSET) |
| 570 | len = ADT7310_T13_VALUE_FLOAT_OFFSET; |
| 571 | pos[len] = 0; |
| 572 | ret = strict_strtol(pos, 10, &tmp2); |
| 573 | |
| 574 | if (!ret) |
| 575 | tmp2 = (tmp2 / 625) * 625; |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | if (tmp1 < 0) |
| 580 | data = (u16)(-tmp1); |
| 581 | else |
| 582 | data = (u16)tmp1; |
| 583 | |
| 584 | if (chip->config & ADT7310_RESOLUTION) { |
| 585 | data = (data << ADT7310_T16_VALUE_FLOAT_OFFSET) | |
| 586 | (tmp2 & ADT7310_T16_VALUE_FLOAT_MASK); |
| 587 | |
| 588 | if (tmp1 < 0) |
| 589 | /* convert positive value to supplyment */ |
| 590 | data = (u16)((ADT7310_T16_VALUE_SIGN << 1) - (u32)data); |
| 591 | } else { |
| 592 | data = (data << ADT7310_T13_VALUE_FLOAT_OFFSET) | |
| 593 | (tmp2 & ADT7310_T13_VALUE_FLOAT_MASK); |
| 594 | |
| 595 | if (tmp1 < 0) |
| 596 | /* convert positive value to supplyment */ |
| 597 | data = (ADT7310_T13_VALUE_SIGN << 1) - data; |
| 598 | data <<= ADT7310_T13_VALUE_OFFSET; |
| 599 | } |
| 600 | |
| 601 | ret = adt7310_spi_write_word(chip, bound_reg, data); |
| 602 | if (ret) |
| 603 | return -EIO; |
| 604 | |
| 605 | return len; |
| 606 | } |
| 607 | |
| 608 | static ssize_t adt7310_show_t_alarm_high(struct device *dev, |
| 609 | struct device_attribute *attr, |
| 610 | char *buf) |
| 611 | { |
| 612 | return adt7310_show_t_bound(dev, attr, |
| 613 | ADT7310_T_ALARM_HIGH, buf); |
| 614 | } |
| 615 | |
| 616 | static inline ssize_t adt7310_set_t_alarm_high(struct device *dev, |
| 617 | struct device_attribute *attr, |
| 618 | const char *buf, |
| 619 | size_t len) |
| 620 | { |
| 621 | return adt7310_set_t_bound(dev, attr, |
| 622 | ADT7310_T_ALARM_HIGH, buf, len); |
| 623 | } |
| 624 | |
| 625 | static ssize_t adt7310_show_t_alarm_low(struct device *dev, |
| 626 | struct device_attribute *attr, |
| 627 | char *buf) |
| 628 | { |
| 629 | return adt7310_show_t_bound(dev, attr, |
| 630 | ADT7310_T_ALARM_LOW, buf); |
| 631 | } |
| 632 | |
| 633 | static inline ssize_t adt7310_set_t_alarm_low(struct device *dev, |
| 634 | struct device_attribute *attr, |
| 635 | const char *buf, |
| 636 | size_t len) |
| 637 | { |
| 638 | return adt7310_set_t_bound(dev, attr, |
| 639 | ADT7310_T_ALARM_LOW, buf, len); |
| 640 | } |
| 641 | |
| 642 | static ssize_t adt7310_show_t_crit(struct device *dev, |
| 643 | struct device_attribute *attr, |
| 644 | char *buf) |
| 645 | { |
| 646 | return adt7310_show_t_bound(dev, attr, |
| 647 | ADT7310_T_CRIT, buf); |
| 648 | } |
| 649 | |
| 650 | static inline ssize_t adt7310_set_t_crit(struct device *dev, |
| 651 | struct device_attribute *attr, |
| 652 | const char *buf, |
| 653 | size_t len) |
| 654 | { |
| 655 | return adt7310_set_t_bound(dev, attr, |
| 656 | ADT7310_T_CRIT, buf, len); |
| 657 | } |
| 658 | |
| 659 | static ssize_t adt7310_show_t_hyst(struct device *dev, |
| 660 | struct device_attribute *attr, |
| 661 | char *buf) |
| 662 | { |
| 663 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 664 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 665 | int ret; |
| 666 | u8 t_hyst; |
| 667 | |
| 668 | ret = adt7310_spi_read_byte(chip, ADT7310_T_HYST, &t_hyst); |
| 669 | if (ret) |
| 670 | return -EIO; |
| 671 | |
| 672 | return sprintf(buf, "%d\n", t_hyst & ADT7310_T_HYST_MASK); |
| 673 | } |
| 674 | |
| 675 | static inline ssize_t adt7310_set_t_hyst(struct device *dev, |
| 676 | struct device_attribute *attr, |
| 677 | const char *buf, |
| 678 | size_t len) |
| 679 | { |
| 680 | struct iio_dev *dev_info = dev_get_drvdata(dev); |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 681 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 682 | int ret; |
| 683 | unsigned long data; |
| 684 | u8 t_hyst; |
| 685 | |
| 686 | ret = strict_strtol(buf, 10, &data); |
| 687 | |
| 688 | if (ret || data > ADT7310_T_HYST_MASK) |
| 689 | return -EINVAL; |
| 690 | |
| 691 | t_hyst = (u8)data; |
| 692 | |
| 693 | ret = adt7310_spi_write_byte(chip, ADT7310_T_HYST, t_hyst); |
| 694 | if (ret) |
| 695 | return -EIO; |
| 696 | |
| 697 | return len; |
| 698 | } |
| 699 | |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 700 | static IIO_DEVICE_ATTR(event_mode, |
| 701 | S_IRUGO | S_IWUSR, |
| 702 | adt7310_show_event_mode, adt7310_set_event_mode, 0); |
| 703 | static IIO_DEVICE_ATTR(available_event_modes, |
| 704 | S_IRUGO | S_IWUSR, |
| 705 | adt7310_show_available_event_modes, NULL, 0); |
| 706 | static IIO_DEVICE_ATTR(fault_queue, |
| 707 | S_IRUGO | S_IWUSR, |
| 708 | adt7310_show_fault_queue, adt7310_set_fault_queue, 0); |
| 709 | static IIO_DEVICE_ATTR(t_alarm_high, |
| 710 | S_IRUGO | S_IWUSR, |
| 711 | adt7310_show_t_alarm_high, adt7310_set_t_alarm_high, 0); |
| 712 | static IIO_DEVICE_ATTR(t_alarm_low, |
| 713 | S_IRUGO | S_IWUSR, |
| 714 | adt7310_show_t_alarm_low, adt7310_set_t_alarm_low, 0); |
| 715 | static IIO_DEVICE_ATTR(t_crit, |
| 716 | S_IRUGO | S_IWUSR, |
| 717 | adt7310_show_t_crit, adt7310_set_t_crit, 0); |
| 718 | static IIO_DEVICE_ATTR(t_hyst, |
| 719 | S_IRUGO | S_IWUSR, |
| 720 | adt7310_show_t_hyst, adt7310_set_t_hyst, 0); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 721 | |
| 722 | static struct attribute *adt7310_event_int_attributes[] = { |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 723 | &iio_dev_attr_event_mode.dev_attr.attr, |
| 724 | &iio_dev_attr_available_event_modes.dev_attr.attr, |
| 725 | &iio_dev_attr_fault_queue.dev_attr.attr, |
| 726 | &iio_dev_attr_t_alarm_high.dev_attr.attr, |
| 727 | &iio_dev_attr_t_alarm_low.dev_attr.attr, |
| 728 | &iio_dev_attr_t_hyst.dev_attr.attr, |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 729 | NULL, |
| 730 | }; |
| 731 | |
| 732 | static struct attribute *adt7310_event_ct_attributes[] = { |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 733 | &iio_dev_attr_event_mode.dev_attr.attr, |
| 734 | &iio_dev_attr_available_event_modes.dev_attr.attr, |
| 735 | &iio_dev_attr_fault_queue.dev_attr.attr, |
| 736 | &iio_dev_attr_t_crit.dev_attr.attr, |
| 737 | &iio_dev_attr_t_hyst.dev_attr.attr, |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 738 | NULL, |
| 739 | }; |
| 740 | |
| 741 | static struct attribute_group adt7310_event_attribute_group[ADT7310_IRQS] = { |
| 742 | { |
| 743 | .attrs = adt7310_event_int_attributes, |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 744 | .name = "events", |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 745 | }, { |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 746 | .attrs = adt7310_event_ct_attributes, |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 747 | .name = "events", |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 748 | } |
| 749 | }; |
| 750 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 751 | static const struct iio_info adt7310_info = { |
| 752 | .attrs = &adt7310_attribute_group, |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 753 | .event_attrs = adt7310_event_attribute_group, |
| 754 | .driver_module = THIS_MODULE, |
| 755 | }; |
| 756 | |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 757 | /* |
| 758 | * device probe and remove |
| 759 | */ |
| 760 | |
| 761 | static int __devinit adt7310_probe(struct spi_device *spi_dev) |
| 762 | { |
| 763 | struct adt7310_chip_info *chip; |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 764 | struct iio_dev *indio_dev; |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 765 | int ret = 0; |
| 766 | unsigned long *adt7310_platform_data = spi_dev->dev.platform_data; |
| 767 | unsigned long irq_flags; |
| 768 | |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 769 | indio_dev = iio_allocate_device(sizeof(*chip)); |
| 770 | if (indio_dev == NULL) { |
| 771 | ret = -ENOMEM; |
| 772 | goto error_ret; |
| 773 | } |
| 774 | chip = iio_priv(indio_dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 775 | /* this is only used for device removal purposes */ |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 776 | dev_set_drvdata(&spi_dev->dev, indio_dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 777 | |
| 778 | chip->spi_dev = spi_dev; |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 779 | |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 780 | indio_dev->dev.parent = &spi_dev->dev; |
| 781 | indio_dev->name = spi_get_device_id(spi_dev)->name; |
| 782 | indio_dev->info = &adt7310_info; |
| 783 | indio_dev->modes = INDIO_DIRECT_MODE; |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 784 | |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 785 | /* CT critcal temperature event. line 0 */ |
| 786 | if (spi_dev->irq) { |
| 787 | if (adt7310_platform_data[2]) |
| 788 | irq_flags = adt7310_platform_data[2]; |
| 789 | else |
| 790 | irq_flags = IRQF_TRIGGER_LOW; |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 791 | ret = request_threaded_irq(spi_dev->irq, |
| 792 | NULL, |
| 793 | &adt7310_event_handler, |
| 794 | irq_flags, |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 795 | indio_dev->name, |
| 796 | indio_dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 797 | if (ret) |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 798 | goto error_free_dev; |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | /* INT bound temperature alarm event. line 1 */ |
| 802 | if (adt7310_platform_data[0]) { |
Jonathan Cameron | cda0b2a | 2011-05-18 14:41:13 +0100 | [diff] [blame] | 803 | ret = request_threaded_irq(adt7310_platform_data[0], |
| 804 | NULL, |
| 805 | &adt7310_event_handler, |
| 806 | adt7310_platform_data[1], |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 807 | indio_dev->name, |
| 808 | indio_dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 809 | if (ret) |
| 810 | goto error_unreg_ct_irq; |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 811 | } |
| 812 | |
| 813 | if (spi_dev->irq && adt7310_platform_data[0]) { |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 814 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| 815 | if (ret) { |
| 816 | ret = -EIO; |
| 817 | goto error_unreg_int_irq; |
| 818 | } |
| 819 | |
| 820 | /* set irq polarity low level */ |
| 821 | chip->config &= ~ADT7310_CT_POLARITY; |
| 822 | |
| 823 | if (adt7310_platform_data[1] & IRQF_TRIGGER_HIGH) |
| 824 | chip->config |= ADT7310_INT_POLARITY; |
| 825 | else |
| 826 | chip->config &= ~ADT7310_INT_POLARITY; |
| 827 | |
| 828 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, chip->config); |
| 829 | if (ret) { |
| 830 | ret = -EIO; |
| 831 | goto error_unreg_int_irq; |
| 832 | } |
| 833 | } |
| 834 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 835 | ret = iio_device_register(indio_dev); |
| 836 | if (ret) |
| 837 | goto error_unreg_int_irq; |
| 838 | |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 839 | dev_info(&spi_dev->dev, "%s temperature sensor registered.\n", |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 840 | indio_dev->name); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 841 | |
| 842 | return 0; |
| 843 | |
| 844 | error_unreg_int_irq: |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 845 | free_irq(adt7310_platform_data[0], indio_dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 846 | error_unreg_ct_irq: |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 847 | free_irq(spi_dev->irq, indio_dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 848 | error_free_dev: |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 849 | iio_free_device(indio_dev); |
| 850 | error_ret: |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 851 | return ret; |
| 852 | } |
| 853 | |
| 854 | static int __devexit adt7310_remove(struct spi_device *spi_dev) |
| 855 | { |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 856 | struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 857 | unsigned long *adt7310_platform_data = spi_dev->dev.platform_data; |
| 858 | |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 859 | iio_device_unregister(indio_dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 860 | dev_set_drvdata(&spi_dev->dev, NULL); |
| 861 | if (adt7310_platform_data[0]) |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 862 | free_irq(adt7310_platform_data[0], indio_dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 863 | if (spi_dev->irq) |
Jonathan Cameron | 7978f9f | 2011-06-27 13:07:28 +0100 | [diff] [blame] | 864 | free_irq(spi_dev->irq, indio_dev); |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 865 | iio_free_device(indio_dev); |
Sonic Zhang | a5d8c6b | 2010-10-27 21:44:01 -0400 | [diff] [blame] | 866 | |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | static const struct spi_device_id adt7310_id[] = { |
| 871 | { "adt7310", 0 }, |
| 872 | {} |
| 873 | }; |
| 874 | |
| 875 | MODULE_DEVICE_TABLE(spi, adt7310_id); |
| 876 | |
| 877 | static struct spi_driver adt7310_driver = { |
| 878 | .driver = { |
| 879 | .name = "adt7310", |
| 880 | .bus = &spi_bus_type, |
| 881 | .owner = THIS_MODULE, |
| 882 | }, |
| 883 | .probe = adt7310_probe, |
| 884 | .remove = __devexit_p(adt7310_remove), |
| 885 | .id_table = adt7310_id, |
| 886 | }; |
| 887 | |
| 888 | static __init int adt7310_init(void) |
| 889 | { |
| 890 | return spi_register_driver(&adt7310_driver); |
| 891 | } |
| 892 | |
| 893 | static __exit void adt7310_exit(void) |
| 894 | { |
| 895 | spi_unregister_driver(&adt7310_driver); |
| 896 | } |
| 897 | |
| 898 | MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>"); |
| 899 | MODULE_DESCRIPTION("Analog Devices ADT7310 digital" |
| 900 | " temperature sensor driver"); |
| 901 | MODULE_LICENSE("GPL v2"); |
| 902 | |
| 903 | module_init(adt7310_init); |
| 904 | module_exit(adt7310_exit); |