Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 1 | /* |
| 2 | * exynos4_tmu.c - Samsung EXYNOS4 TMU (Thermal Management Unit) |
| 3 | * |
| 4 | * Copyright (C) 2011 Samsung Electronics |
| 5 | * Donggeun Kim <dg77.kim@samsung.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/err.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/platform_device.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/clk.h> |
| 30 | #include <linux/workqueue.h> |
| 31 | #include <linux/sysfs.h> |
| 32 | #include <linux/kobject.h> |
| 33 | #include <linux/io.h> |
| 34 | #include <linux/mutex.h> |
| 35 | |
| 36 | #include <linux/hwmon.h> |
| 37 | #include <linux/hwmon-sysfs.h> |
| 38 | |
| 39 | #include <linux/platform_data/exynos4_tmu.h> |
| 40 | |
| 41 | #define EXYNOS4_TMU_REG_TRIMINFO 0x0 |
| 42 | #define EXYNOS4_TMU_REG_CONTROL 0x20 |
| 43 | #define EXYNOS4_TMU_REG_STATUS 0x28 |
| 44 | #define EXYNOS4_TMU_REG_CURRENT_TEMP 0x40 |
| 45 | #define EXYNOS4_TMU_REG_THRESHOLD_TEMP 0x44 |
| 46 | #define EXYNOS4_TMU_REG_TRIG_LEVEL0 0x50 |
| 47 | #define EXYNOS4_TMU_REG_TRIG_LEVEL1 0x54 |
| 48 | #define EXYNOS4_TMU_REG_TRIG_LEVEL2 0x58 |
| 49 | #define EXYNOS4_TMU_REG_TRIG_LEVEL3 0x5C |
| 50 | #define EXYNOS4_TMU_REG_PAST_TEMP0 0x60 |
| 51 | #define EXYNOS4_TMU_REG_PAST_TEMP1 0x64 |
| 52 | #define EXYNOS4_TMU_REG_PAST_TEMP2 0x68 |
| 53 | #define EXYNOS4_TMU_REG_PAST_TEMP3 0x6C |
| 54 | #define EXYNOS4_TMU_REG_INTEN 0x70 |
| 55 | #define EXYNOS4_TMU_REG_INTSTAT 0x74 |
| 56 | #define EXYNOS4_TMU_REG_INTCLEAR 0x78 |
| 57 | |
| 58 | #define EXYNOS4_TMU_GAIN_SHIFT 8 |
| 59 | #define EXYNOS4_TMU_REF_VOLTAGE_SHIFT 24 |
| 60 | |
| 61 | #define EXYNOS4_TMU_TRIM_TEMP_MASK 0xff |
| 62 | #define EXYNOS4_TMU_CORE_ON 3 |
| 63 | #define EXYNOS4_TMU_CORE_OFF 2 |
| 64 | #define EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET 50 |
| 65 | #define EXYNOS4_TMU_TRIG_LEVEL0_MASK 0x1 |
| 66 | #define EXYNOS4_TMU_TRIG_LEVEL1_MASK 0x10 |
| 67 | #define EXYNOS4_TMU_TRIG_LEVEL2_MASK 0x100 |
| 68 | #define EXYNOS4_TMU_TRIG_LEVEL3_MASK 0x1000 |
| 69 | #define EXYNOS4_TMU_INTCLEAR_VAL 0x1111 |
| 70 | |
| 71 | struct exynos4_tmu_data { |
| 72 | struct exynos4_tmu_platform_data *pdata; |
| 73 | struct device *hwmon_dev; |
| 74 | struct resource *mem; |
| 75 | void __iomem *base; |
| 76 | int irq; |
| 77 | struct work_struct irq_work; |
| 78 | struct mutex lock; |
| 79 | struct clk *clk; |
| 80 | u8 temp_error1, temp_error2; |
| 81 | }; |
| 82 | |
| 83 | /* |
| 84 | * TMU treats temperature as a mapped temperature code. |
| 85 | * The temperature is converted differently depending on the calibration type. |
| 86 | */ |
| 87 | static int temp_to_code(struct exynos4_tmu_data *data, u8 temp) |
| 88 | { |
| 89 | struct exynos4_tmu_platform_data *pdata = data->pdata; |
| 90 | int temp_code; |
| 91 | |
| 92 | /* temp should range between 25 and 125 */ |
| 93 | if (temp < 25 || temp > 125) { |
| 94 | temp_code = -EINVAL; |
| 95 | goto out; |
| 96 | } |
| 97 | |
| 98 | switch (pdata->cal_type) { |
| 99 | case TYPE_TWO_POINT_TRIMMING: |
| 100 | temp_code = (temp - 25) * |
| 101 | (data->temp_error2 - data->temp_error1) / |
| 102 | (85 - 25) + data->temp_error1; |
| 103 | break; |
| 104 | case TYPE_ONE_POINT_TRIMMING: |
| 105 | temp_code = temp + data->temp_error1 - 25; |
| 106 | break; |
| 107 | default: |
| 108 | temp_code = temp + EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET; |
| 109 | break; |
| 110 | } |
| 111 | out: |
| 112 | return temp_code; |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * Calculate a temperature value from a temperature code. |
| 117 | * The unit of the temperature is degree Celsius. |
| 118 | */ |
| 119 | static int code_to_temp(struct exynos4_tmu_data *data, u8 temp_code) |
| 120 | { |
| 121 | struct exynos4_tmu_platform_data *pdata = data->pdata; |
| 122 | int temp; |
| 123 | |
| 124 | /* temp_code should range between 75 and 175 */ |
| 125 | if (temp_code < 75 || temp_code > 175) { |
| 126 | temp = -ENODATA; |
| 127 | goto out; |
| 128 | } |
| 129 | |
| 130 | switch (pdata->cal_type) { |
| 131 | case TYPE_TWO_POINT_TRIMMING: |
| 132 | temp = (temp_code - data->temp_error1) * (85 - 25) / |
| 133 | (data->temp_error2 - data->temp_error1) + 25; |
| 134 | break; |
| 135 | case TYPE_ONE_POINT_TRIMMING: |
| 136 | temp = temp_code - data->temp_error1 + 25; |
| 137 | break; |
| 138 | default: |
| 139 | temp = temp_code - EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET; |
| 140 | break; |
| 141 | } |
| 142 | out: |
| 143 | return temp; |
| 144 | } |
| 145 | |
| 146 | static int exynos4_tmu_initialize(struct platform_device *pdev) |
| 147 | { |
| 148 | struct exynos4_tmu_data *data = platform_get_drvdata(pdev); |
| 149 | struct exynos4_tmu_platform_data *pdata = data->pdata; |
| 150 | unsigned int status, trim_info; |
| 151 | int ret = 0, threshold_code; |
| 152 | |
| 153 | mutex_lock(&data->lock); |
| 154 | clk_enable(data->clk); |
| 155 | |
| 156 | status = readb(data->base + EXYNOS4_TMU_REG_STATUS); |
| 157 | if (!status) { |
| 158 | ret = -EBUSY; |
| 159 | goto out; |
| 160 | } |
| 161 | |
| 162 | /* Save trimming info in order to perform calibration */ |
| 163 | trim_info = readl(data->base + EXYNOS4_TMU_REG_TRIMINFO); |
| 164 | data->temp_error1 = trim_info & EXYNOS4_TMU_TRIM_TEMP_MASK; |
| 165 | data->temp_error2 = ((trim_info >> 8) & EXYNOS4_TMU_TRIM_TEMP_MASK); |
| 166 | |
| 167 | /* Write temperature code for threshold */ |
| 168 | threshold_code = temp_to_code(data, pdata->threshold); |
| 169 | if (threshold_code < 0) { |
| 170 | ret = threshold_code; |
| 171 | goto out; |
| 172 | } |
| 173 | writeb(threshold_code, |
| 174 | data->base + EXYNOS4_TMU_REG_THRESHOLD_TEMP); |
| 175 | |
| 176 | writeb(pdata->trigger_levels[0], |
| 177 | data->base + EXYNOS4_TMU_REG_TRIG_LEVEL0); |
| 178 | writeb(pdata->trigger_levels[1], |
| 179 | data->base + EXYNOS4_TMU_REG_TRIG_LEVEL1); |
| 180 | writeb(pdata->trigger_levels[2], |
| 181 | data->base + EXYNOS4_TMU_REG_TRIG_LEVEL2); |
| 182 | writeb(pdata->trigger_levels[3], |
| 183 | data->base + EXYNOS4_TMU_REG_TRIG_LEVEL3); |
| 184 | |
| 185 | writel(EXYNOS4_TMU_INTCLEAR_VAL, |
| 186 | data->base + EXYNOS4_TMU_REG_INTCLEAR); |
| 187 | out: |
| 188 | clk_disable(data->clk); |
| 189 | mutex_unlock(&data->lock); |
| 190 | |
| 191 | return ret; |
| 192 | } |
| 193 | |
| 194 | static void exynos4_tmu_control(struct platform_device *pdev, bool on) |
| 195 | { |
| 196 | struct exynos4_tmu_data *data = platform_get_drvdata(pdev); |
| 197 | struct exynos4_tmu_platform_data *pdata = data->pdata; |
| 198 | unsigned int con, interrupt_en; |
| 199 | |
| 200 | mutex_lock(&data->lock); |
| 201 | clk_enable(data->clk); |
| 202 | |
| 203 | con = pdata->reference_voltage << EXYNOS4_TMU_REF_VOLTAGE_SHIFT | |
| 204 | pdata->gain << EXYNOS4_TMU_GAIN_SHIFT; |
| 205 | if (on) { |
| 206 | con |= EXYNOS4_TMU_CORE_ON; |
| 207 | interrupt_en = pdata->trigger_level3_en << 12 | |
| 208 | pdata->trigger_level2_en << 8 | |
| 209 | pdata->trigger_level1_en << 4 | |
| 210 | pdata->trigger_level0_en; |
| 211 | } else { |
| 212 | con |= EXYNOS4_TMU_CORE_OFF; |
| 213 | interrupt_en = 0; /* Disable all interrupts */ |
| 214 | } |
| 215 | writel(interrupt_en, data->base + EXYNOS4_TMU_REG_INTEN); |
| 216 | writel(con, data->base + EXYNOS4_TMU_REG_CONTROL); |
| 217 | |
| 218 | clk_disable(data->clk); |
| 219 | mutex_unlock(&data->lock); |
| 220 | } |
| 221 | |
| 222 | static int exynos4_tmu_read(struct exynos4_tmu_data *data) |
| 223 | { |
| 224 | u8 temp_code; |
| 225 | int temp; |
| 226 | |
| 227 | mutex_lock(&data->lock); |
| 228 | clk_enable(data->clk); |
| 229 | |
| 230 | temp_code = readb(data->base + EXYNOS4_TMU_REG_CURRENT_TEMP); |
| 231 | temp = code_to_temp(data, temp_code); |
| 232 | |
| 233 | clk_disable(data->clk); |
| 234 | mutex_unlock(&data->lock); |
| 235 | |
| 236 | return temp; |
| 237 | } |
| 238 | |
| 239 | static void exynos4_tmu_work(struct work_struct *work) |
| 240 | { |
| 241 | struct exynos4_tmu_data *data = container_of(work, |
| 242 | struct exynos4_tmu_data, irq_work); |
| 243 | |
| 244 | mutex_lock(&data->lock); |
| 245 | clk_enable(data->clk); |
| 246 | |
| 247 | writel(EXYNOS4_TMU_INTCLEAR_VAL, data->base + EXYNOS4_TMU_REG_INTCLEAR); |
| 248 | |
| 249 | kobject_uevent(&data->hwmon_dev->kobj, KOBJ_CHANGE); |
| 250 | |
| 251 | enable_irq(data->irq); |
| 252 | |
| 253 | clk_disable(data->clk); |
| 254 | mutex_unlock(&data->lock); |
| 255 | } |
| 256 | |
| 257 | static irqreturn_t exynos4_tmu_irq(int irq, void *id) |
| 258 | { |
| 259 | struct exynos4_tmu_data *data = id; |
| 260 | |
| 261 | disable_irq_nosync(irq); |
| 262 | schedule_work(&data->irq_work); |
| 263 | |
| 264 | return IRQ_HANDLED; |
| 265 | } |
| 266 | |
| 267 | static ssize_t exynos4_tmu_show_name(struct device *dev, |
| 268 | struct device_attribute *attr, char *buf) |
| 269 | { |
| 270 | return sprintf(buf, "exynos4-tmu\n"); |
| 271 | } |
| 272 | |
| 273 | static ssize_t exynos4_tmu_show_temp(struct device *dev, |
| 274 | struct device_attribute *attr, char *buf) |
| 275 | { |
| 276 | struct exynos4_tmu_data *data = dev_get_drvdata(dev); |
| 277 | int ret; |
| 278 | |
| 279 | ret = exynos4_tmu_read(data); |
| 280 | if (ret < 0) |
| 281 | return ret; |
| 282 | |
| 283 | /* convert from degree Celsius to millidegree Celsius */ |
| 284 | return sprintf(buf, "%d\n", ret * 1000); |
| 285 | } |
| 286 | |
| 287 | static ssize_t exynos4_tmu_show_alarm(struct device *dev, |
| 288 | struct device_attribute *devattr, char *buf) |
| 289 | { |
| 290 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 291 | struct exynos4_tmu_data *data = dev_get_drvdata(dev); |
| 292 | struct exynos4_tmu_platform_data *pdata = data->pdata; |
| 293 | int temp; |
| 294 | unsigned int trigger_level; |
| 295 | |
| 296 | temp = exynos4_tmu_read(data); |
| 297 | if (temp < 0) |
| 298 | return temp; |
| 299 | |
| 300 | trigger_level = pdata->threshold + pdata->trigger_levels[attr->index]; |
| 301 | |
| 302 | return sprintf(buf, "%d\n", !!(temp > trigger_level)); |
| 303 | } |
| 304 | |
| 305 | static ssize_t exynos4_tmu_show_level(struct device *dev, |
| 306 | struct device_attribute *devattr, char *buf) |
| 307 | { |
| 308 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 309 | struct exynos4_tmu_data *data = dev_get_drvdata(dev); |
| 310 | struct exynos4_tmu_platform_data *pdata = data->pdata; |
| 311 | unsigned int temp = pdata->threshold + |
| 312 | pdata->trigger_levels[attr->index]; |
| 313 | |
| 314 | return sprintf(buf, "%u\n", temp * 1000); |
| 315 | } |
| 316 | |
| 317 | static DEVICE_ATTR(name, S_IRUGO, exynos4_tmu_show_name, NULL); |
| 318 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, exynos4_tmu_show_temp, NULL, 0); |
| 319 | |
| 320 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, |
| 321 | exynos4_tmu_show_alarm, NULL, 1); |
| 322 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, |
| 323 | exynos4_tmu_show_alarm, NULL, 2); |
| 324 | static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, |
| 325 | exynos4_tmu_show_alarm, NULL, 3); |
| 326 | |
| 327 | static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, exynos4_tmu_show_level, NULL, 1); |
| 328 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, exynos4_tmu_show_level, NULL, 2); |
| 329 | static SENSOR_DEVICE_ATTR(temp1_emergency, S_IRUGO, |
| 330 | exynos4_tmu_show_level, NULL, 3); |
| 331 | |
| 332 | static struct attribute *exynos4_tmu_attributes[] = { |
| 333 | &dev_attr_name.attr, |
| 334 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
| 335 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
| 336 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, |
| 337 | &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr, |
| 338 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
| 339 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
| 340 | &sensor_dev_attr_temp1_emergency.dev_attr.attr, |
| 341 | NULL, |
| 342 | }; |
| 343 | |
| 344 | static const struct attribute_group exynos4_tmu_attr_group = { |
| 345 | .attrs = exynos4_tmu_attributes, |
| 346 | }; |
| 347 | |
| 348 | static int __devinit exynos4_tmu_probe(struct platform_device *pdev) |
| 349 | { |
| 350 | struct exynos4_tmu_data *data; |
| 351 | struct exynos4_tmu_platform_data *pdata = pdev->dev.platform_data; |
| 352 | int ret; |
| 353 | |
| 354 | if (!pdata) { |
| 355 | dev_err(&pdev->dev, "No platform init data supplied.\n"); |
| 356 | return -ENODEV; |
| 357 | } |
| 358 | |
| 359 | data = kzalloc(sizeof(struct exynos4_tmu_data), GFP_KERNEL); |
| 360 | if (!data) { |
| 361 | dev_err(&pdev->dev, "Failed to allocate driver structure\n"); |
| 362 | return -ENOMEM; |
| 363 | } |
| 364 | |
| 365 | data->irq = platform_get_irq(pdev, 0); |
| 366 | if (data->irq < 0) { |
| 367 | ret = data->irq; |
| 368 | dev_err(&pdev->dev, "Failed to get platform irq\n"); |
| 369 | goto err_free; |
| 370 | } |
| 371 | |
| 372 | INIT_WORK(&data->irq_work, exynos4_tmu_work); |
| 373 | |
| 374 | data->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 375 | if (!data->mem) { |
| 376 | ret = -ENOENT; |
| 377 | dev_err(&pdev->dev, "Failed to get platform resource\n"); |
| 378 | goto err_free; |
| 379 | } |
| 380 | |
| 381 | data->mem = request_mem_region(data->mem->start, |
| 382 | resource_size(data->mem), pdev->name); |
| 383 | if (!data->mem) { |
| 384 | ret = -ENODEV; |
| 385 | dev_err(&pdev->dev, "Failed to request memory region\n"); |
| 386 | goto err_free; |
| 387 | } |
| 388 | |
| 389 | data->base = ioremap(data->mem->start, resource_size(data->mem)); |
| 390 | if (!data->base) { |
| 391 | ret = -ENODEV; |
| 392 | dev_err(&pdev->dev, "Failed to ioremap memory\n"); |
| 393 | goto err_mem_region; |
| 394 | } |
| 395 | |
| 396 | ret = request_irq(data->irq, exynos4_tmu_irq, |
Yong Zhang | 3f67f83 | 2011-09-21 05:28:57 -0400 | [diff] [blame] | 397 | IRQF_TRIGGER_RISING, |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 398 | "exynos4-tmu", data); |
| 399 | if (ret) { |
| 400 | dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq); |
| 401 | goto err_io_remap; |
| 402 | } |
| 403 | |
| 404 | data->clk = clk_get(NULL, "tmu_apbif"); |
| 405 | if (IS_ERR(data->clk)) { |
| 406 | ret = PTR_ERR(data->clk); |
| 407 | dev_err(&pdev->dev, "Failed to get clock\n"); |
| 408 | goto err_irq; |
| 409 | } |
| 410 | |
| 411 | data->pdata = pdata; |
| 412 | platform_set_drvdata(pdev, data); |
| 413 | mutex_init(&data->lock); |
| 414 | |
| 415 | ret = exynos4_tmu_initialize(pdev); |
| 416 | if (ret) { |
| 417 | dev_err(&pdev->dev, "Failed to initialize TMU\n"); |
| 418 | goto err_clk; |
| 419 | } |
| 420 | |
| 421 | ret = sysfs_create_group(&pdev->dev.kobj, &exynos4_tmu_attr_group); |
| 422 | if (ret) { |
| 423 | dev_err(&pdev->dev, "Failed to create sysfs group\n"); |
| 424 | goto err_clk; |
| 425 | } |
| 426 | |
| 427 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
| 428 | if (IS_ERR(data->hwmon_dev)) { |
| 429 | ret = PTR_ERR(data->hwmon_dev); |
| 430 | dev_err(&pdev->dev, "Failed to register hwmon device\n"); |
| 431 | goto err_create_group; |
| 432 | } |
| 433 | |
| 434 | exynos4_tmu_control(pdev, true); |
| 435 | |
| 436 | return 0; |
| 437 | |
| 438 | err_create_group: |
| 439 | sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group); |
| 440 | err_clk: |
| 441 | platform_set_drvdata(pdev, NULL); |
| 442 | clk_put(data->clk); |
| 443 | err_irq: |
| 444 | free_irq(data->irq, data); |
| 445 | err_io_remap: |
| 446 | iounmap(data->base); |
| 447 | err_mem_region: |
| 448 | release_mem_region(data->mem->start, resource_size(data->mem)); |
| 449 | err_free: |
| 450 | kfree(data); |
| 451 | |
| 452 | return ret; |
| 453 | } |
| 454 | |
| 455 | static int __devexit exynos4_tmu_remove(struct platform_device *pdev) |
| 456 | { |
| 457 | struct exynos4_tmu_data *data = platform_get_drvdata(pdev); |
| 458 | |
| 459 | exynos4_tmu_control(pdev, false); |
| 460 | |
| 461 | hwmon_device_unregister(data->hwmon_dev); |
| 462 | sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group); |
| 463 | |
| 464 | clk_put(data->clk); |
| 465 | |
| 466 | free_irq(data->irq, data); |
| 467 | |
| 468 | iounmap(data->base); |
| 469 | release_mem_region(data->mem->start, resource_size(data->mem)); |
| 470 | |
| 471 | platform_set_drvdata(pdev, NULL); |
| 472 | |
| 473 | kfree(data); |
| 474 | |
| 475 | return 0; |
| 476 | } |
| 477 | |
Rafael J. Wysocki | 08cd675 | 2012-07-08 21:48:15 +0200 | [diff] [blame^] | 478 | #ifdef CONFIG_PM_SLEEP |
| 479 | static int exynos4_tmu_suspend(struct device *dev) |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 480 | { |
Rafael J. Wysocki | 08cd675 | 2012-07-08 21:48:15 +0200 | [diff] [blame^] | 481 | exynos4_tmu_control(to_platform_device(dev), false); |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 482 | |
| 483 | return 0; |
| 484 | } |
| 485 | |
Rafael J. Wysocki | 08cd675 | 2012-07-08 21:48:15 +0200 | [diff] [blame^] | 486 | static int exynos4_tmu_resume(struct device *dev) |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 487 | { |
Rafael J. Wysocki | 08cd675 | 2012-07-08 21:48:15 +0200 | [diff] [blame^] | 488 | struct platform_device *pdev = to_platform_device(dev); |
| 489 | |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 490 | exynos4_tmu_initialize(pdev); |
| 491 | exynos4_tmu_control(pdev, true); |
| 492 | |
| 493 | return 0; |
| 494 | } |
Rafael J. Wysocki | 08cd675 | 2012-07-08 21:48:15 +0200 | [diff] [blame^] | 495 | |
| 496 | static SIMPLE_DEV_PM_OPS(exynos4_tmu_pm, |
| 497 | exynos4_tmu_suspend, exynos4_tmu_resume); |
| 498 | #define EXYNOS4_TMU_PM &exynos4_tmu_pm |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 499 | #else |
Rafael J. Wysocki | 08cd675 | 2012-07-08 21:48:15 +0200 | [diff] [blame^] | 500 | #define EXYNOS4_TMU_PM NULL |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 501 | #endif |
| 502 | |
| 503 | static struct platform_driver exynos4_tmu_driver = { |
| 504 | .driver = { |
| 505 | .name = "exynos4-tmu", |
| 506 | .owner = THIS_MODULE, |
Rafael J. Wysocki | 08cd675 | 2012-07-08 21:48:15 +0200 | [diff] [blame^] | 507 | .pm = EXYNOS4_TMU_PM, |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 508 | }, |
| 509 | .probe = exynos4_tmu_probe, |
| 510 | .remove = __devexit_p(exynos4_tmu_remove), |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 511 | }; |
| 512 | |
Axel Lin | 25a236a | 2011-11-25 02:31:00 -0500 | [diff] [blame] | 513 | module_platform_driver(exynos4_tmu_driver); |
Donggeun Kim | 9d97e5c | 2011-09-07 18:49:08 +0900 | [diff] [blame] | 514 | |
| 515 | MODULE_DESCRIPTION("EXYNOS4 TMU Driver"); |
| 516 | MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>"); |
| 517 | MODULE_LICENSE("GPL"); |
| 518 | MODULE_ALIAS("platform:exynos4-tmu"); |