target/linux/brcm2708/patches-3.18/0017-Added-hwmon-thermal-driver-for-reporting-core-temper.patch

   1 From de9bdcff7ec73589cb314a1569ce5aba5fe09146 Mon Sep 17 00:00:00 2001
   2 From: popcornmix <popcornmix@gmail.com>
   3 Date: Tue, 26 Mar 2013 19:24:24 +0000
   4 Subject: [PATCH 017/114] Added hwmon/thermal driver for reporting core
   5  temperature. Thanks Dorian
   6
   7 ---
   8  arch/arm/mach-bcm2708/bcm2708.c   |  11 ++
   9  drivers/hwmon/Kconfig             |  10 ++
  10  drivers/hwmon/Makefile            |   1 +
  11  drivers/hwmon/bcm2835-hwmon.c     | 219 ++++++++++++++++++++++++++++++++++++++
  12  drivers/thermal/Kconfig           |   6 ++
  13  drivers/thermal/Makefile          |   1 +
  14  drivers/thermal/bcm2835-thermal.c | 184 ++++++++++++++++++++++++++++++++
  15  7 files changed, 432 insertions(+)
  16  create mode 100644 drivers/hwmon/bcm2835-hwmon.c
  17  create mode 100644 drivers/thermal/bcm2835-thermal.c
  18
  19 diff --git a/arch/arm/mach-bcm2708/bcm2708.c b/arch/arm/mach-bcm2708/bcm2708.c
  20 index f3dccae..af57d11 100644
  21 --- a/arch/arm/mach-bcm2708/bcm2708.c
  22 +++ b/arch/arm/mach-bcm2708/bcm2708.c
  23 @@ -455,6 +455,14 @@ static struct platform_device bcm2708_alsa_devices[] = {
  24                },
  25  };
  26
  27 +static struct platform_device bcm2835_hwmon_device = {
  28 +       .name = "bcm2835_hwmon",
  29 +};
  30 +
  31 +static struct platform_device bcm2835_thermal_device = {
  32 +       .name = "bcm2835_thermal",
  33 +};
  34 +
  35  int __init bcm_register_device(struct platform_device *pdev)
  36  {
  37         int ret;
  38 @@ -563,6 +571,9 @@ void __init bcm2708_init(void)
  39         for (i = 0; i < ARRAY_SIZE(bcm2708_alsa_devices); i++)
  40                 bcm_register_device(&bcm2708_alsa_devices[i]);
  41
  42 +       bcm_register_device(&bcm2835_hwmon_device);
  43 +       bcm_register_device(&bcm2835_thermal_device);
  44 +
  45         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
  46                 struct amba_device *d = amba_devs[i];
  47                 amba_device_register(d, &iomem_resource);
  48 diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
  49 index 5286d7c..d52e192 100644
  50 --- a/drivers/hwmon/Kconfig
  51 +++ b/drivers/hwmon/Kconfig
  52 @@ -1680,6 +1680,16 @@ config SENSORS_ULTRA45
  53           This driver provides support for the Ultra45 workstation environmental
  54           sensors.
  55
  56 +config SENSORS_BCM2835
  57 +       depends on THERMAL_BCM2835=n
  58 +       tristate "Broadcom BCM2835 HWMON Driver"
  59 +       help
  60 +         If you say yes here you get support for the hardware
  61 +         monitoring features of the BCM2835 Chip
  62 +
  63 +         This driver can also be built as a module.  If so, the module
  64 +         will be called bcm2835-hwmon.
  65 +
  66  if ACPI
  67
  68  comment "ACPI drivers"
  69 diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
  70 index c90a761..15aaecf 100644
  71 --- a/drivers/hwmon/Makefile
  72 +++ b/drivers/hwmon/Makefile
  73 @@ -153,6 +153,7 @@ obj-$(CONFIG_SENSORS_W83L785TS)     += w83l785ts.o
  74  obj-$(CONFIG_SENSORS_WM831X)   += wm831x-hwmon.o
  75  obj-$(CONFIG_SENSORS_WM8350)   += wm8350-hwmon.o
  76  obj-$(CONFIG_SENSORS_GSC)      += gsc.o
  77 +obj-$(CONFIG_SENSORS_BCM2835)  += bcm2835-hwmon.o
  78
  79  obj-$(CONFIG_PMBUS)            += pmbus/
  80
  81 diff --git a/drivers/hwmon/bcm2835-hwmon.c b/drivers/hwmon/bcm2835-hwmon.c
  82 new file mode 100644
  83 index 0000000..5bbed45
  84 --- /dev/null
  85 +++ b/drivers/hwmon/bcm2835-hwmon.c
  86 @@ -0,0 +1,219 @@
  87 +/*****************************************************************************
  88 +* Copyright 2011 Broadcom Corporation.  All rights reserved.
  89 +*
  90 +* Unless you and Broadcom execute a separate written software license
  91 +* agreement governing use of this software, this software is licensed to you
  92 +* under the terms of the GNU General Public License version 2, available at
  93 +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
  94 +*
  95 +* Notwithstanding the above, under no circumstances may you combine this
  96 +* software in any way with any other Broadcom software provided under a
  97 +* license other than the GPL, without Broadcom's express prior written
  98 +* consent.
  99 +*****************************************************************************/
 100 +
 101 +#include <linux/kernel.h>
 102 +#include <linux/module.h>
 103 +#include <linux/init.h>
 104 +#include <linux/hwmon.h>
 105 +#include <linux/hwmon-sysfs.h>
 106 +#include <linux/platform_device.h>
 107 +#include <linux/sysfs.h>
 108 +#include <mach/vcio.h>
 109 +#include <linux/slab.h>
 110 +#include <linux/err.h>
 111 +
 112 +#define MODULE_NAME "bcm2835_hwmon"
 113 +
 114 +/*#define HWMON_DEBUG_ENABLE*/
 115 +
 116 +#ifdef HWMON_DEBUG_ENABLE
 117 +#define print_debug(fmt,...) printk(KERN_INFO "%s:%s:%d: "fmt"\n", MODULE_NAME, __func__, __LINE__, ##__VA_ARGS__)
 118 +#else
 119 +#define print_debug(fmt,...)
 120 +#endif
 121 +#define print_err(fmt,...) printk(KERN_ERR "%s:%s:%d: "fmt"\n", MODULE_NAME, __func__,__LINE__, ##__VA_ARGS__)
 122 +#define print_info(fmt,...) printk(KERN_INFO "%s: "fmt"\n", MODULE_NAME, ##__VA_ARGS__)
 123 +
 124 +#define VC_TAG_GET_TEMP 0x00030006
 125 +#define VC_TAG_GET_MAX_TEMP 0x0003000A
 126 +
 127 +/* --- STRUCTS --- */
 128 +struct bcm2835_hwmon_data {
 129 +       struct device *hwmon_dev;
 130 +};
 131 +
 132 +/* tag part of the message */
 133 +struct vc_msg_tag {
 134 +       uint32_t tag_id;                /* the tag ID for the temperature */
 135 +       uint32_t buffer_size;   /* size of the buffer (should be 8) */
 136 +       uint32_t request_code;  /* identifies message as a request (should be 0) */
 137 +       uint32_t id;                    /* extra ID field (should be 0) */
 138 +       uint32_t val;                   /* returned value of the temperature */
 139 +};
 140 +
 141 +/* message structure to be sent to videocore */
 142 +struct vc_msg {
 143 +       uint32_t msg_size;              /* simply, sizeof(struct vc_msg) */
 144 +       uint32_t request_code;          /* holds various information like the success and number of bytes returned (refer to mailboxes wiki) */
 145 +       struct vc_msg_tag tag;          /* the tag structure above to make */
 146 +       uint32_t end_tag;               /* an end identifier, should be set to NULL */
 147 +};
 148 +
 149 +typedef enum {
 150 +       TEMP,
 151 +       MAX_TEMP,
 152 +} temp_type;
 153 +
 154 +/* --- PROTOTYPES --- */
 155 +static ssize_t bcm2835_get_temp(struct device *dev, struct device_attribute *attr, char *buf);
 156 +static ssize_t bcm2835_get_name(struct device *dev, struct device_attribute *attr, char *buf);
 157 +
 158 +/* --- GLOBALS --- */
 159 +
 160 +static struct bcm2835_hwmon_data *bcm2835_data;
 161 +static struct platform_driver bcm2835_hwmon_driver;
 162 +
 163 +static SENSOR_DEVICE_ATTR(name, S_IRUGO,bcm2835_get_name,NULL,0);
 164 +static SENSOR_DEVICE_ATTR(temp1_input,S_IRUGO,bcm2835_get_temp,NULL,TEMP);
 165 +static SENSOR_DEVICE_ATTR(temp1_max,S_IRUGO,bcm2835_get_temp,NULL,MAX_TEMP);
 166 +
 167 +static struct attribute* bcm2835_attributes[] = {
 168 +       &sensor_dev_attr_name.dev_attr.attr,
 169 +       &sensor_dev_attr_temp1_input.dev_attr.attr,
 170 +       &sensor_dev_attr_temp1_max.dev_attr.attr,
 171 +       NULL,
 172 +};
 173 +
 174 +static struct attribute_group bcm2835_attr_group = {
 175 +       .attrs = bcm2835_attributes,
 176 +};
 177 +
 178 +/* --- FUNCTIONS --- */
 179 +
 180 +static ssize_t bcm2835_get_name(struct device *dev, struct device_attribute *attr, char *buf)
 181 +{
 182 +       return sprintf(buf,"bcm2835_hwmon\n");
 183 +}
 184 +
 185 +static ssize_t bcm2835_get_temp(struct device *dev, struct device_attribute *attr, char *buf)
 186 +{
 187 +       struct vc_msg msg;
 188 +       int result;
 189 +       uint temp = 0;
 190 +       int index = ((struct sensor_device_attribute*)to_sensor_dev_attr(attr))->index;
 191 +
 192 +       print_debug("IN");
 193 +
 194 +       /* wipe all previous message data */
 195 +       memset(&msg, 0, sizeof msg);
 196 +
 197 +       /* determine the message type */
 198 +       if(index == TEMP)
 199 +               msg.tag.tag_id = VC_TAG_GET_TEMP;
 200 +       else if (index == MAX_TEMP)
 201 +               msg.tag.tag_id = VC_TAG_GET_MAX_TEMP;
 202 +       else
 203 +       {
 204 +               print_debug("Unknown temperature message!");
 205 +               return -EINVAL;
 206 +       }
 207 +
 208 +       msg.msg_size = sizeof msg;
 209 +       msg.tag.buffer_size = 8;
 210 +
 211 +       /* send the message */
 212 +       result = bcm_mailbox_property(&msg, sizeof msg);
 213 +
 214 +       /* check if it was all ok and return the rate in milli degrees C */
 215 +       if (result == 0 && (msg.request_code & 0x80000000))
 216 +               temp = (uint)msg.tag.val;
 217 +       #ifdef HWMON_DEBUG_ENABLE
 218 +       else
 219 +               print_debug("Failed to get temperature!");
 220 +       #endif
 221 +       print_debug("Got temperature as %u",temp);
 222 +       print_debug("OUT");
 223 +       return sprintf(buf, "%u\n", temp);
 224 +}
 225 +
 226 +
 227 +static int bcm2835_hwmon_probe(struct platform_device *pdev)
 228 +{
 229 +       int err;
 230 +
 231 +       print_debug("IN");
 232 +       print_debug("HWMON Driver has been probed!");
 233 +
 234 +       /* check that the device isn't null!*/
 235 +       if(pdev == NULL)
 236 +       {
 237 +               print_debug("Platform device is empty!");
 238 +               return -ENODEV;
 239 +       }
 240 +
 241 +       /* allocate memory for neccessary data */
 242 +       bcm2835_data = kzalloc(sizeof(struct bcm2835_hwmon_data),GFP_KERNEL);
 243 +       if(!bcm2835_data)
 244 +       {
 245 +               print_debug("Unable to allocate memory for hwmon data!");
 246 +               err = -ENOMEM;
 247 +               goto kzalloc_error;
 248 +       }
 249 +
 250 +       /* create the sysfs files */
 251 +       if(sysfs_create_group(&pdev->dev.kobj, &bcm2835_attr_group))
 252 +       {
 253 +               print_debug("Unable to create sysfs files!");
 254 +               err = -EFAULT;
 255 +               goto sysfs_error;
 256 +       }
 257 +
 258 +       /* register the hwmon device */
 259 +       bcm2835_data->hwmon_dev = hwmon_device_register(&pdev->dev);
 260 +       if (IS_ERR(bcm2835_data->hwmon_dev))
 261 +       {
 262 +               err = PTR_ERR(bcm2835_data->hwmon_dev);
 263 +               goto hwmon_error;
 264 +       }
 265 +       print_debug("OUT");
 266 +       return 0;
 267 +
 268 +       /* error goto's */
 269 +       hwmon_error:
 270 +       sysfs_remove_group(&pdev->dev.kobj, &bcm2835_attr_group);
 271 +
 272 +       sysfs_error:
 273 +       kfree(bcm2835_data);
 274 +
 275 +       kzalloc_error:
 276 +
 277 +       return err;
 278 +
 279 +}
 280 +
 281 +static int bcm2835_hwmon_remove(struct platform_device *pdev)
 282 +{
 283 +       print_debug("IN");
 284 +       hwmon_device_unregister(bcm2835_data->hwmon_dev);
 285 +
 286 +       sysfs_remove_group(&pdev->dev.kobj, &bcm2835_attr_group);
 287 +       print_debug("OUT");
 288 +       return 0;
 289 +}
 290 +
 291 +/* Hwmon Driver */
 292 +static struct platform_driver bcm2835_hwmon_driver = {
 293 +       .probe = bcm2835_hwmon_probe,
 294 +       .remove = bcm2835_hwmon_remove,
 295 +       .driver = {
 296 +                               .name = "bcm2835_hwmon",
 297 +                               .owner = THIS_MODULE,
 298 +                       },
 299 +};
 300 +
 301 +MODULE_LICENSE("GPL");
 302 +MODULE_AUTHOR("Dorian Peake");
 303 +MODULE_DESCRIPTION("HW Monitor driver for bcm2835 chip");
 304 +
 305 +module_platform_driver(bcm2835_hwmon_driver);
 306 diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
 307 index f554d25..fecc621 100644
 308 --- a/drivers/thermal/Kconfig
 309 +++ b/drivers/thermal/Kconfig
 310 @@ -206,6 +206,12 @@ config INTEL_POWERCLAMP
 311           enforce idle time which results in more package C-state residency. The
 312           user interface is exposed via generic thermal framework.
 313
 314 +config THERMAL_BCM2835
 315 +       tristate "BCM2835 Thermal Driver"
 316 +       help
 317 +         This will enable temperature monitoring for the Broadcom BCM2835
 318 +         chip. If built as a module, it will be called 'bcm2835-thermal'.
 319 +
 320  config X86_PKG_TEMP_THERMAL
 321         tristate "X86 package temperature thermal driver"
 322         depends on X86_THERMAL_VECTOR
 323 diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
 324 index 39c4fe8..30a4741 100644
 325 --- a/drivers/thermal/Makefile
 326 +++ b/drivers/thermal/Makefile
 327 @@ -29,6 +29,7 @@ obj-$(CONFIG_ARMADA_THERMAL)  += armada_thermal.o
 328  obj-$(CONFIG_IMX_THERMAL)      += imx_thermal.o
 329  obj-$(CONFIG_DB8500_CPUFREQ_COOLING)   += db8500_cpufreq_cooling.o
 330  obj-$(CONFIG_INTEL_POWERCLAMP) += intel_powerclamp.o
 331 +obj-$(CONFIG_THERMAL_BCM2835)  += bcm2835-thermal.o
 332  obj-$(CONFIG_X86_PKG_TEMP_THERMAL)     += x86_pkg_temp_thermal.o
 333  obj-$(CONFIG_INTEL_SOC_DTS_THERMAL)    += intel_soc_dts_thermal.o
 334  obj-$(CONFIG_TI_SOC_THERMAL)   += ti-soc-thermal/
 335 diff --git a/drivers/thermal/bcm2835-thermal.c b/drivers/thermal/bcm2835-thermal.c
 336 new file mode 100644
 337 index 0000000..85fceb5
 338 --- /dev/null
 339 +++ b/drivers/thermal/bcm2835-thermal.c
 340 @@ -0,0 +1,184 @@
 341 +/*****************************************************************************
 342 +* Copyright 2011 Broadcom Corporation.  All rights reserved.
 343 +*
 344 +* Unless you and Broadcom execute a separate written software license
 345 +* agreement governing use of this software, this software is licensed to you
 346 +* under the terms of the GNU General Public License version 2, available at
 347 +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
 348 +*
 349 +* Notwithstanding the above, under no circumstances may you combine this
 350 +* software in any way with any other Broadcom software provided under a
 351 +* license other than the GPL, without Broadcom's express prior written
 352 +* consent.
 353 +*****************************************************************************/
 354 +
 355 +#include <linux/kernel.h>
 356 +#include <linux/module.h>
 357 +#include <linux/init.h>
 358 +#include <linux/platform_device.h>
 359 +#include <linux/slab.h>
 360 +#include <linux/sysfs.h>
 361 +#include <mach/vcio.h>
 362 +#include <linux/thermal.h>
 363 +
 364 +
 365 +/* --- DEFINITIONS --- */
 366 +#define MODULE_NAME "bcm2835_thermal"
 367 +
 368 +/*#define THERMAL_DEBUG_ENABLE*/
 369 +
 370 +#ifdef THERMAL_DEBUG_ENABLE
 371 +#define print_debug(fmt,...) printk(KERN_INFO "%s:%s:%d: "fmt"\n", MODULE_NAME, __func__, __LINE__, ##__VA_ARGS__)
 372 +#else
 373 +#define print_debug(fmt,...)
 374 +#endif
 375 +#define print_err(fmt,...) printk(KERN_ERR "%s:%s:%d: "fmt"\n", MODULE_NAME, __func__,__LINE__, ##__VA_ARGS__)
 376 +
 377 +#define VC_TAG_GET_TEMP 0x00030006
 378 +#define VC_TAG_GET_MAX_TEMP 0x0003000A
 379 +
 380 +typedef enum {
 381 +       TEMP,
 382 +       MAX_TEMP,
 383 +} temp_type;
 384 +
 385 +/* --- STRUCTS --- */
 386 +/* tag part of the message */
 387 +struct vc_msg_tag {
 388 +       uint32_t tag_id;                /* the tag ID for the temperature */
 389 +       uint32_t buffer_size;   /* size of the buffer (should be 8) */
 390 +       uint32_t request_code;  /* identifies message as a request (should be 0) */
 391 +       uint32_t id;                    /* extra ID field (should be 0) */
 392 +       uint32_t val;                   /* returned value of the temperature */
 393 +};
 394 +
 395 +/* message structure to be sent to videocore */
 396 +struct vc_msg {
 397 +       uint32_t msg_size;              /* simply, sizeof(struct vc_msg) */
 398 +       uint32_t request_code;          /* holds various information like the success and number of bytes returned (refer to mailboxes wiki) */
 399 +       struct vc_msg_tag tag;          /* the tag structure above to make */
 400 +       uint32_t end_tag;               /* an end identifier, should be set to NULL */
 401 +};
 402 +
 403 +struct bcm2835_thermal_data {
 404 +       struct thermal_zone_device *thermal_dev;
 405 +       struct vc_msg msg;
 406 +};
 407 +
 408 +/* --- GLOBALS --- */
 409 +static struct bcm2835_thermal_data bcm2835_data;
 410 +
 411 +/* Thermal Device Operations */
 412 +static struct thermal_zone_device_ops ops;
 413 +
 414 +/* --- FUNCTIONS --- */
 415 +
 416 +static int bcm2835_get_temp_or_max(struct thermal_zone_device *thermal_dev, unsigned long *temp, unsigned tag_id)
 417 +{
 418 +       int result = -1, retry = 3;
 419 +       print_debug("IN");
 420 +
 421 +       *temp = 0;
 422 +       while (result != 0 && retry-- > 0) {
 423 +               /* wipe all previous message data */
 424 +               memset(&bcm2835_data.msg, 0, sizeof bcm2835_data.msg);
 425 +
 426 +               /* prepare message */
 427 +               bcm2835_data.msg.msg_size = sizeof bcm2835_data.msg;
 428 +               bcm2835_data.msg.tag.buffer_size = 8;
 429 +               bcm2835_data.msg.tag.tag_id = tag_id;
 430 +
 431 +               /* send the message */
 432 +               result = bcm_mailbox_property(&bcm2835_data.msg, sizeof bcm2835_data.msg);
 433 +               print_debug("Got %stemperature as %u (%d,%x)\n", tag_id==VC_TAG_GET_MAX_TEMP ? "max ":"", (uint)bcm2835_data.msg.tag.val, result, bcm2835_data.msg.request_code);
 434 +               if (!(bcm2835_data.msg.request_code & 0x80000000))
 435 +                       result = -1;
 436 +       }
 437 +
 438 +       /* check if it was all ok and return the rate in milli degrees C */
 439 +       if (result == 0)
 440 +               *temp = (uint)bcm2835_data.msg.tag.val;
 441 +       else
 442 +               print_err("Failed to get temperature! (%x:%d)\n", tag_id, result);
 443 +       print_debug("OUT");
 444 +       return result;
 445 +}
 446 +
 447 +static int bcm2835_get_temp(struct thermal_zone_device *thermal_dev, unsigned long *temp)
 448 +{
 449 +       return bcm2835_get_temp_or_max(thermal_dev, temp, VC_TAG_GET_TEMP);
 450 +}
 451 +
 452 +static int bcm2835_get_max_temp(struct thermal_zone_device *thermal_dev, int trip_num, unsigned long *temp)
 453 +{
 454 +       return bcm2835_get_temp_or_max(thermal_dev, temp, VC_TAG_GET_MAX_TEMP);
 455 +}
 456 +
 457 +static int bcm2835_get_trip_type(struct thermal_zone_device * thermal_dev, int trip_num, enum thermal_trip_type *trip_type)
 458 +{
 459 +       *trip_type = THERMAL_TRIP_HOT;
 460 +       return 0;
 461 +}
 462 +
 463 +
 464 +static int bcm2835_get_mode(struct thermal_zone_device *thermal_dev, enum thermal_device_mode *dev_mode)
 465 +{
 466 +       *dev_mode = THERMAL_DEVICE_ENABLED;
 467 +       return 0;
 468 +}
 469 +
 470 +
 471 +static int bcm2835_thermal_probe(struct platform_device *pdev)
 472 +{
 473 +       print_debug("IN");
 474 +       print_debug("THERMAL Driver has been probed!");
 475 +
 476 +       /* check that the device isn't null!*/
 477 +       if(pdev == NULL)
 478 +       {
 479 +               print_debug("Platform device is empty!");
 480 +               return -ENODEV;
 481 +       }
 482 +
 483 +       if(!(bcm2835_data.thermal_dev = thermal_zone_device_register("bcm2835_thermal",  1, 0, NULL, &ops, NULL, 0, 0)))
 484 +       {
 485 +               print_debug("Unable to register the thermal device!");
 486 +               return -EFAULT;
 487 +       }
 488 +       return 0;
 489 +}
 490 +
 491 +
 492 +static int bcm2835_thermal_remove(struct platform_device *pdev)
 493 +{
 494 +       print_debug("IN");
 495 +
 496 +       thermal_zone_device_unregister(bcm2835_data.thermal_dev);
 497 +
 498 +       print_debug("OUT");
 499 +
 500 +       return 0;
 501 +}
 502 +
 503 +static struct thermal_zone_device_ops ops  = {
 504 +       .get_temp = bcm2835_get_temp,
 505 +       .get_trip_temp = bcm2835_get_max_temp,
 506 +       .get_trip_type = bcm2835_get_trip_type,
 507 +       .get_mode = bcm2835_get_mode,
 508 +};
 509 +
 510 +/* Thermal Driver */
 511 +static struct platform_driver bcm2835_thermal_driver = {
 512 +       .probe = bcm2835_thermal_probe,
 513 +       .remove = bcm2835_thermal_remove,
 514 +       .driver = {
 515 +                               .name = "bcm2835_thermal",
 516 +                               .owner = THIS_MODULE,
 517 +                       },
 518 +};
 519 +
 520 +MODULE_LICENSE("GPL");
 521 +MODULE_AUTHOR("Dorian Peake");
 522 +MODULE_DESCRIPTION("Thermal driver for bcm2835 chip");
 523 +
 524 +module_platform_driver(bcm2835_thermal_driver);
 525 --
 526 1.8.3.2
 527