Hongbo Zhang | 0bbb06e | 2013-04-03 20:18:12 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) ST-Ericsson 2010 - 2013 |
| 3 | * Author: Martin Persson <martin.persson@stericsson.com> |
| 4 | * Hongbo Zhang <hongbo.zhang@linaro.org> |
| 5 | * License Terms: GNU General Public License v2 |
| 6 | * |
| 7 | * ABX500 does not provide auto ADC, so to monitor the required temperatures, |
| 8 | * a periodic work is used. It is more important to not wake up the CPU than |
| 9 | * to perform this job, hence the use of a deferred delay. |
| 10 | * |
| 11 | * A deferred delay for thermal monitor is considered safe because: |
| 12 | * If the chip gets too hot during a sleep state it's most likely due to |
| 13 | * external factors, such as the surrounding temperature. I.e. no SW decisions |
| 14 | * will make any difference. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/hwmon.h> |
| 19 | #include <linux/hwmon-sysfs.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/jiffies.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/mutex.h> |
| 24 | #include <linux/of.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/pm.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/sysfs.h> |
| 29 | #include <linux/workqueue.h> |
| 30 | #include "abx500.h" |
| 31 | |
| 32 | #define DEFAULT_MONITOR_DELAY HZ |
| 33 | #define DEFAULT_MAX_TEMP 130 |
| 34 | |
| 35 | static inline void schedule_monitor(struct abx500_temp *data) |
| 36 | { |
| 37 | data->work_active = true; |
| 38 | schedule_delayed_work(&data->work, DEFAULT_MONITOR_DELAY); |
| 39 | } |
| 40 | |
| 41 | static void threshold_updated(struct abx500_temp *data) |
| 42 | { |
| 43 | int i; |
| 44 | for (i = 0; i < data->monitored_sensors; i++) |
| 45 | if (data->max[i] != 0 || data->min[i] != 0) { |
| 46 | schedule_monitor(data); |
| 47 | return; |
| 48 | } |
| 49 | |
| 50 | dev_dbg(&data->pdev->dev, "No active thresholds.\n"); |
| 51 | cancel_delayed_work_sync(&data->work); |
| 52 | data->work_active = false; |
| 53 | } |
| 54 | |
| 55 | static void gpadc_monitor(struct work_struct *work) |
| 56 | { |
| 57 | int temp, i, ret; |
| 58 | char alarm_node[30]; |
| 59 | bool updated_min_alarm, updated_max_alarm; |
| 60 | struct abx500_temp *data; |
| 61 | |
| 62 | data = container_of(work, struct abx500_temp, work.work); |
| 63 | mutex_lock(&data->lock); |
| 64 | |
| 65 | for (i = 0; i < data->monitored_sensors; i++) { |
| 66 | /* Thresholds are considered inactive if set to 0 */ |
| 67 | if (data->max[i] == 0 && data->min[i] == 0) |
| 68 | continue; |
| 69 | |
| 70 | if (data->max[i] < data->min[i]) |
| 71 | continue; |
| 72 | |
| 73 | ret = data->ops.read_sensor(data, data->gpadc_addr[i], &temp); |
| 74 | if (ret < 0) { |
| 75 | dev_err(&data->pdev->dev, "GPADC read failed\n"); |
| 76 | continue; |
| 77 | } |
| 78 | |
| 79 | updated_min_alarm = false; |
| 80 | updated_max_alarm = false; |
| 81 | |
| 82 | if (data->min[i] != 0) { |
| 83 | if (temp < data->min[i]) { |
| 84 | if (data->min_alarm[i] == false) { |
| 85 | data->min_alarm[i] = true; |
| 86 | updated_min_alarm = true; |
| 87 | } |
| 88 | } else { |
| 89 | if (data->min_alarm[i] == true) { |
| 90 | data->min_alarm[i] = false; |
| 91 | updated_min_alarm = true; |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | if (data->max[i] != 0) { |
| 96 | if (temp > data->max[i]) { |
| 97 | if (data->max_alarm[i] == false) { |
| 98 | data->max_alarm[i] = true; |
| 99 | updated_max_alarm = true; |
| 100 | } |
| 101 | } else if (temp < data->max[i] - data->max_hyst[i]) { |
| 102 | if (data->max_alarm[i] == true) { |
| 103 | data->max_alarm[i] = false; |
| 104 | updated_max_alarm = true; |
| 105 | } |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | if (updated_min_alarm) { |
| 110 | ret = sprintf(alarm_node, "temp%d_min_alarm", i + 1); |
| 111 | sysfs_notify(&data->pdev->dev.kobj, NULL, alarm_node); |
| 112 | } |
| 113 | if (updated_max_alarm) { |
| 114 | ret = sprintf(alarm_node, "temp%d_max_alarm", i + 1); |
| 115 | sysfs_notify(&data->pdev->dev.kobj, NULL, alarm_node); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | schedule_monitor(data); |
| 120 | mutex_unlock(&data->lock); |
| 121 | } |
| 122 | |
| 123 | /* HWMON sysfs interfaces */ |
| 124 | static ssize_t show_name(struct device *dev, struct device_attribute *devattr, |
| 125 | char *buf) |
| 126 | { |
| 127 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 128 | /* Show chip name */ |
| 129 | return data->ops.show_name(dev, devattr, buf); |
| 130 | } |
| 131 | |
| 132 | static ssize_t show_label(struct device *dev, |
| 133 | struct device_attribute *devattr, char *buf) |
| 134 | { |
| 135 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 136 | /* Show each sensor label */ |
| 137 | return data->ops.show_label(dev, devattr, buf); |
| 138 | } |
| 139 | |
| 140 | static ssize_t show_input(struct device *dev, |
| 141 | struct device_attribute *devattr, char *buf) |
| 142 | { |
| 143 | int ret, temp; |
| 144 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 145 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 146 | u8 gpadc_addr = data->gpadc_addr[attr->index]; |
| 147 | |
| 148 | ret = data->ops.read_sensor(data, gpadc_addr, &temp); |
| 149 | if (ret < 0) |
| 150 | return ret; |
| 151 | |
| 152 | return sprintf(buf, "%d\n", temp); |
| 153 | } |
| 154 | |
| 155 | /* Set functions (RW nodes) */ |
| 156 | static ssize_t set_min(struct device *dev, struct device_attribute *devattr, |
| 157 | const char *buf, size_t count) |
| 158 | { |
| 159 | unsigned long val; |
| 160 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 161 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 162 | int res = kstrtol(buf, 10, &val); |
| 163 | if (res < 0) |
| 164 | return res; |
| 165 | |
| 166 | val = clamp_val(val, 0, DEFAULT_MAX_TEMP); |
| 167 | |
| 168 | mutex_lock(&data->lock); |
| 169 | data->min[attr->index] = val; |
| 170 | threshold_updated(data); |
| 171 | mutex_unlock(&data->lock); |
| 172 | |
| 173 | return count; |
| 174 | } |
| 175 | |
| 176 | static ssize_t set_max(struct device *dev, struct device_attribute *devattr, |
| 177 | const char *buf, size_t count) |
| 178 | { |
| 179 | unsigned long val; |
| 180 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 181 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 182 | int res = kstrtol(buf, 10, &val); |
| 183 | if (res < 0) |
| 184 | return res; |
| 185 | |
| 186 | val = clamp_val(val, 0, DEFAULT_MAX_TEMP); |
| 187 | |
| 188 | mutex_lock(&data->lock); |
| 189 | data->max[attr->index] = val; |
| 190 | threshold_updated(data); |
| 191 | mutex_unlock(&data->lock); |
| 192 | |
| 193 | return count; |
| 194 | } |
| 195 | |
| 196 | static ssize_t set_max_hyst(struct device *dev, |
| 197 | struct device_attribute *devattr, |
| 198 | const char *buf, size_t count) |
| 199 | { |
| 200 | unsigned long val; |
| 201 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 202 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 203 | int res = kstrtoul(buf, 10, &val); |
| 204 | if (res < 0) |
| 205 | return res; |
| 206 | |
| 207 | val = clamp_val(val, 0, DEFAULT_MAX_TEMP); |
| 208 | |
| 209 | mutex_lock(&data->lock); |
| 210 | data->max_hyst[attr->index] = val; |
| 211 | threshold_updated(data); |
| 212 | mutex_unlock(&data->lock); |
| 213 | |
| 214 | return count; |
| 215 | } |
| 216 | |
| 217 | /* Show functions (RO nodes) */ |
| 218 | static ssize_t show_min(struct device *dev, |
| 219 | struct device_attribute *devattr, char *buf) |
| 220 | { |
| 221 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 222 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 223 | |
Asaf Vertz | a14c707 | 2015-01-21 10:03:22 +0200 | [diff] [blame] | 224 | return sprintf(buf, "%lu\n", data->min[attr->index]); |
Hongbo Zhang | 0bbb06e | 2013-04-03 20:18:12 +0800 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | static ssize_t show_max(struct device *dev, |
| 228 | struct device_attribute *devattr, char *buf) |
| 229 | { |
| 230 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 231 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 232 | |
Asaf Vertz | a14c707 | 2015-01-21 10:03:22 +0200 | [diff] [blame] | 233 | return sprintf(buf, "%lu\n", data->max[attr->index]); |
Hongbo Zhang | 0bbb06e | 2013-04-03 20:18:12 +0800 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | static ssize_t show_max_hyst(struct device *dev, |
| 237 | struct device_attribute *devattr, char *buf) |
| 238 | { |
| 239 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 240 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 241 | |
Asaf Vertz | a14c707 | 2015-01-21 10:03:22 +0200 | [diff] [blame] | 242 | return sprintf(buf, "%lu\n", data->max_hyst[attr->index]); |
Hongbo Zhang | 0bbb06e | 2013-04-03 20:18:12 +0800 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | static ssize_t show_min_alarm(struct device *dev, |
| 246 | struct device_attribute *devattr, char *buf) |
| 247 | { |
| 248 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 249 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 250 | |
| 251 | return sprintf(buf, "%d\n", data->min_alarm[attr->index]); |
| 252 | } |
| 253 | |
| 254 | static ssize_t show_max_alarm(struct device *dev, |
| 255 | struct device_attribute *devattr, char *buf) |
| 256 | { |
| 257 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 258 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 259 | |
| 260 | return sprintf(buf, "%d\n", data->max_alarm[attr->index]); |
| 261 | } |
| 262 | |
Al Viro | 60b7bf4 | 2013-05-04 14:46:28 -0400 | [diff] [blame] | 263 | static umode_t abx500_attrs_visible(struct kobject *kobj, |
Hongbo Zhang | 0bbb06e | 2013-04-03 20:18:12 +0800 | [diff] [blame] | 264 | struct attribute *attr, int n) |
| 265 | { |
| 266 | struct device *dev = container_of(kobj, struct device, kobj); |
| 267 | struct abx500_temp *data = dev_get_drvdata(dev); |
| 268 | |
| 269 | if (data->ops.is_visible) |
| 270 | return data->ops.is_visible(attr, n); |
| 271 | |
| 272 | return attr->mode; |
| 273 | } |
| 274 | |
| 275 | /* Chip name, required by hwmon */ |
| 276 | static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0); |
| 277 | |
| 278 | /* GPADC - SENSOR1 */ |
| 279 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_label, NULL, 0); |
| 280 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0); |
| 281 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_min, set_min, 0); |
| 282 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_max, set_max, 0); |
| 283 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, |
| 284 | show_max_hyst, set_max_hyst, 0); |
| 285 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_min_alarm, NULL, 0); |
| 286 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_max_alarm, NULL, 0); |
| 287 | |
| 288 | /* GPADC - SENSOR2 */ |
| 289 | static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL, 1); |
| 290 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 1); |
| 291 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_min, set_min, 1); |
| 292 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max, set_max, 1); |
| 293 | static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IWUSR | S_IRUGO, |
| 294 | show_max_hyst, set_max_hyst, 1); |
| 295 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_min_alarm, NULL, 1); |
| 296 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_max_alarm, NULL, 1); |
| 297 | |
| 298 | /* GPADC - SENSOR3 */ |
| 299 | static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, show_label, NULL, 2); |
| 300 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_input, NULL, 2); |
| 301 | static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_min, set_min, 2); |
| 302 | static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max, 2); |
| 303 | static SENSOR_DEVICE_ATTR(temp3_max_hyst, S_IWUSR | S_IRUGO, |
| 304 | show_max_hyst, set_max_hyst, 2); |
| 305 | static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_min_alarm, NULL, 2); |
| 306 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_max_alarm, NULL, 2); |
| 307 | |
| 308 | /* GPADC - SENSOR4 */ |
| 309 | static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, show_label, NULL, 3); |
| 310 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_input, NULL, 3); |
| 311 | static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_min, set_min, 3); |
| 312 | static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_max, set_max, 3); |
| 313 | static SENSOR_DEVICE_ATTR(temp4_max_hyst, S_IWUSR | S_IRUGO, |
| 314 | show_max_hyst, set_max_hyst, 3); |
| 315 | static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO, show_min_alarm, NULL, 3); |
| 316 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_max_alarm, NULL, 3); |
| 317 | |
Sachin Kamat | 0b905d8 | 2013-07-11 10:21:00 +0530 | [diff] [blame] | 318 | static struct attribute *abx500_temp_attributes[] = { |
Hongbo Zhang | 0bbb06e | 2013-04-03 20:18:12 +0800 | [diff] [blame] | 319 | &sensor_dev_attr_name.dev_attr.attr, |
| 320 | |
| 321 | &sensor_dev_attr_temp1_label.dev_attr.attr, |
| 322 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
| 323 | &sensor_dev_attr_temp1_min.dev_attr.attr, |
| 324 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
| 325 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
| 326 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, |
| 327 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
| 328 | |
| 329 | &sensor_dev_attr_temp2_label.dev_attr.attr, |
| 330 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
| 331 | &sensor_dev_attr_temp2_min.dev_attr.attr, |
| 332 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
| 333 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, |
| 334 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
| 335 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
| 336 | |
| 337 | &sensor_dev_attr_temp3_label.dev_attr.attr, |
| 338 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
| 339 | &sensor_dev_attr_temp3_min.dev_attr.attr, |
| 340 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
| 341 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, |
| 342 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, |
| 343 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, |
| 344 | |
| 345 | &sensor_dev_attr_temp4_label.dev_attr.attr, |
| 346 | &sensor_dev_attr_temp4_input.dev_attr.attr, |
| 347 | &sensor_dev_attr_temp4_min.dev_attr.attr, |
| 348 | &sensor_dev_attr_temp4_max.dev_attr.attr, |
| 349 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, |
| 350 | &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, |
| 351 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, |
| 352 | NULL |
| 353 | }; |
| 354 | |
| 355 | static const struct attribute_group abx500_temp_group = { |
| 356 | .attrs = abx500_temp_attributes, |
| 357 | .is_visible = abx500_attrs_visible, |
| 358 | }; |
| 359 | |
| 360 | static irqreturn_t abx500_temp_irq_handler(int irq, void *irq_data) |
| 361 | { |
| 362 | struct platform_device *pdev = irq_data; |
| 363 | struct abx500_temp *data = platform_get_drvdata(pdev); |
| 364 | |
| 365 | data->ops.irq_handler(irq, data); |
| 366 | return IRQ_HANDLED; |
| 367 | } |
| 368 | |
| 369 | static int setup_irqs(struct platform_device *pdev) |
| 370 | { |
| 371 | int ret; |
| 372 | int irq = platform_get_irq_byname(pdev, "ABX500_TEMP_WARM"); |
| 373 | |
| 374 | if (irq < 0) { |
| 375 | dev_err(&pdev->dev, "Get irq by name failed\n"); |
| 376 | return irq; |
| 377 | } |
| 378 | |
| 379 | ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
| 380 | abx500_temp_irq_handler, IRQF_NO_SUSPEND, "abx500-temp", pdev); |
| 381 | if (ret < 0) |
| 382 | dev_err(&pdev->dev, "Request threaded irq failed (%d)\n", ret); |
| 383 | |
| 384 | return ret; |
| 385 | } |
| 386 | |
| 387 | static int abx500_temp_probe(struct platform_device *pdev) |
| 388 | { |
| 389 | struct abx500_temp *data; |
| 390 | int err; |
| 391 | |
| 392 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); |
| 393 | if (!data) |
| 394 | return -ENOMEM; |
| 395 | |
| 396 | data->pdev = pdev; |
| 397 | mutex_init(&data->lock); |
| 398 | |
| 399 | /* Chip specific initialization */ |
| 400 | err = abx500_hwmon_init(data); |
| 401 | if (err < 0 || !data->ops.read_sensor || !data->ops.show_name || |
| 402 | !data->ops.show_label) |
| 403 | return err; |
| 404 | |
| 405 | INIT_DEFERRABLE_WORK(&data->work, gpadc_monitor); |
| 406 | |
| 407 | platform_set_drvdata(pdev, data); |
| 408 | |
| 409 | err = sysfs_create_group(&pdev->dev.kobj, &abx500_temp_group); |
| 410 | if (err < 0) { |
| 411 | dev_err(&pdev->dev, "Create sysfs group failed (%d)\n", err); |
| 412 | return err; |
| 413 | } |
| 414 | |
| 415 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
| 416 | if (IS_ERR(data->hwmon_dev)) { |
| 417 | err = PTR_ERR(data->hwmon_dev); |
| 418 | dev_err(&pdev->dev, "Class registration failed (%d)\n", err); |
| 419 | goto exit_sysfs_group; |
| 420 | } |
| 421 | |
| 422 | if (data->ops.irq_handler) { |
| 423 | err = setup_irqs(pdev); |
| 424 | if (err < 0) |
| 425 | goto exit_hwmon_reg; |
| 426 | } |
| 427 | return 0; |
| 428 | |
| 429 | exit_hwmon_reg: |
| 430 | hwmon_device_unregister(data->hwmon_dev); |
| 431 | exit_sysfs_group: |
| 432 | sysfs_remove_group(&pdev->dev.kobj, &abx500_temp_group); |
| 433 | return err; |
| 434 | } |
| 435 | |
| 436 | static int abx500_temp_remove(struct platform_device *pdev) |
| 437 | { |
| 438 | struct abx500_temp *data = platform_get_drvdata(pdev); |
| 439 | |
| 440 | cancel_delayed_work_sync(&data->work); |
| 441 | hwmon_device_unregister(data->hwmon_dev); |
| 442 | sysfs_remove_group(&pdev->dev.kobj, &abx500_temp_group); |
| 443 | |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | static int abx500_temp_suspend(struct platform_device *pdev, |
| 448 | pm_message_t state) |
| 449 | { |
| 450 | struct abx500_temp *data = platform_get_drvdata(pdev); |
| 451 | |
| 452 | if (data->work_active) |
| 453 | cancel_delayed_work_sync(&data->work); |
| 454 | |
| 455 | return 0; |
| 456 | } |
| 457 | |
| 458 | static int abx500_temp_resume(struct platform_device *pdev) |
| 459 | { |
| 460 | struct abx500_temp *data = platform_get_drvdata(pdev); |
| 461 | |
| 462 | if (data->work_active) |
| 463 | schedule_monitor(data); |
| 464 | |
| 465 | return 0; |
| 466 | } |
| 467 | |
| 468 | #ifdef CONFIG_OF |
| 469 | static const struct of_device_id abx500_temp_match[] = { |
| 470 | { .compatible = "stericsson,abx500-temp" }, |
| 471 | {}, |
| 472 | }; |
| 473 | #endif |
| 474 | |
| 475 | static struct platform_driver abx500_temp_driver = { |
| 476 | .driver = { |
Hongbo Zhang | 0bbb06e | 2013-04-03 20:18:12 +0800 | [diff] [blame] | 477 | .name = "abx500-temp", |
| 478 | .of_match_table = of_match_ptr(abx500_temp_match), |
| 479 | }, |
| 480 | .suspend = abx500_temp_suspend, |
| 481 | .resume = abx500_temp_resume, |
| 482 | .probe = abx500_temp_probe, |
| 483 | .remove = abx500_temp_remove, |
| 484 | }; |
| 485 | |
| 486 | module_platform_driver(abx500_temp_driver); |
| 487 | |
| 488 | MODULE_AUTHOR("Martin Persson <martin.persson@stericsson.com>"); |
| 489 | MODULE_DESCRIPTION("ABX500 temperature driver"); |
| 490 | MODULE_LICENSE("GPL"); |