1/*
   2 * adm1026.c - Part of lm_sensors, Linux kernel modules for hardware
   3 *	       monitoring
   4 * Copyright (C) 2002, 2003  Philip Pokorny <ppokorny@penguincomputing.com>
   5 * Copyright (C) 2004 Justin Thiessen <jthiessen@penguincomputing.com>
   6 *
   7 * Chip details at:
   8 *
   9 * <http://www.onsemi.com/PowerSolutions/product.do?id=ADM1026>
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation; either version 2 of the License, or
  14 * (at your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 */
  25
  26#include <linux/module.h>
  27#include <linux/init.h>
  28#include <linux/slab.h>
  29#include <linux/jiffies.h>
  30#include <linux/i2c.h>
  31#include <linux/hwmon.h>
  32#include <linux/hwmon-sysfs.h>
  33#include <linux/hwmon-vid.h>
  34#include <linux/err.h>
  35#include <linux/mutex.h>
  36
  37/* Addresses to scan */
  38static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  39
  40static int gpio_input[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
  41				-1, -1, -1, -1, -1, -1, -1, -1 };
  42static int gpio_output[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
  43				-1, -1, -1, -1, -1, -1, -1, -1 };
  44static int gpio_inverted[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
  45				-1, -1, -1, -1, -1, -1, -1, -1 };
  46static int gpio_normal[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
  47				-1, -1, -1, -1, -1, -1, -1, -1 };
  48static int gpio_fan[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
  49module_param_array(gpio_input, int, NULL, 0);
  50MODULE_PARM_DESC(gpio_input, "List of GPIO pins (0-16) to program as inputs");
  51module_param_array(gpio_output, int, NULL, 0);
  52MODULE_PARM_DESC(gpio_output,
  53		 "List of GPIO pins (0-16) to program as outputs");
  54module_param_array(gpio_inverted, int, NULL, 0);
  55MODULE_PARM_DESC(gpio_inverted,
  56		 "List of GPIO pins (0-16) to program as inverted");
  57module_param_array(gpio_normal, int, NULL, 0);
  58MODULE_PARM_DESC(gpio_normal,
  59		 "List of GPIO pins (0-16) to program as normal/non-inverted");
  60module_param_array(gpio_fan, int, NULL, 0);
  61MODULE_PARM_DESC(gpio_fan, "List of GPIO pins (0-7) to program as fan tachs");
  62
  63/* Many ADM1026 constants specified below */
  64
  65/* The ADM1026 registers */
  66#define ADM1026_REG_CONFIG1	0x00
  67#define CFG1_MONITOR		0x01
  68#define CFG1_INT_ENABLE		0x02
  69#define CFG1_INT_CLEAR		0x04
  70#define CFG1_AIN8_9		0x08
  71#define CFG1_THERM_HOT		0x10
  72#define CFG1_DAC_AFC		0x20
  73#define CFG1_PWM_AFC		0x40
  74#define CFG1_RESET		0x80
  75
  76#define ADM1026_REG_CONFIG2	0x01
  77/* CONFIG2 controls FAN0/GPIO0 through FAN7/GPIO7 */
  78
  79#define ADM1026_REG_CONFIG3	0x07
  80#define CFG3_GPIO16_ENABLE	0x01
  81#define CFG3_CI_CLEAR		0x02
  82#define CFG3_VREF_250		0x04
  83#define CFG3_GPIO16_DIR		0x40
  84#define CFG3_GPIO16_POL		0x80
  85
  86#define ADM1026_REG_E2CONFIG	0x13
  87#define E2CFG_READ		0x01
  88#define E2CFG_WRITE		0x02
  89#define E2CFG_ERASE		0x04
  90#define E2CFG_ROM		0x08
  91#define E2CFG_CLK_EXT		0x80
  92
  93/*
  94 * There are 10 general analog inputs and 7 dedicated inputs
  95 * They are:
  96 *    0 - 9  =  AIN0 - AIN9
  97 *       10  =  Vbat
  98 *       11  =  3.3V Standby
  99 *       12  =  3.3V Main
 100 *       13  =  +5V
 101 *       14  =  Vccp (CPU core voltage)
 102 *       15  =  +12V
 103 *       16  =  -12V
 104 */
 105static u16 ADM1026_REG_IN[] = {
 106		0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
 107		0x36, 0x37, 0x27, 0x29, 0x26, 0x2a,
 108		0x2b, 0x2c, 0x2d, 0x2e, 0x2f
 109	};
 110static u16 ADM1026_REG_IN_MIN[] = {
 111		0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d,
 112		0x5e, 0x5f, 0x6d, 0x49, 0x6b, 0x4a,
 113		0x4b, 0x4c, 0x4d, 0x4e, 0x4f
 114	};
 115static u16 ADM1026_REG_IN_MAX[] = {
 116		0x50, 0x51, 0x52, 0x53, 0x54, 0x55,
 117		0x56, 0x57, 0x6c, 0x41, 0x6a, 0x42,
 118		0x43, 0x44, 0x45, 0x46, 0x47
 119	};
 120
 121/*
 122 * Temperatures are:
 123 *    0 - Internal
 124 *    1 - External 1
 125 *    2 - External 2
 126 */
 127static u16 ADM1026_REG_TEMP[] = { 0x1f, 0x28, 0x29 };
 128static u16 ADM1026_REG_TEMP_MIN[] = { 0x69, 0x48, 0x49 };
 129static u16 ADM1026_REG_TEMP_MAX[] = { 0x68, 0x40, 0x41 };
 130static u16 ADM1026_REG_TEMP_TMIN[] = { 0x10, 0x11, 0x12 };
 131static u16 ADM1026_REG_TEMP_THERM[] = { 0x0d, 0x0e, 0x0f };
 132static u16 ADM1026_REG_TEMP_OFFSET[] = { 0x1e, 0x6e, 0x6f };
 133
 134#define ADM1026_REG_FAN(nr)		(0x38 + (nr))
 135#define ADM1026_REG_FAN_MIN(nr)		(0x60 + (nr))
 136#define ADM1026_REG_FAN_DIV_0_3		0x02
 137#define ADM1026_REG_FAN_DIV_4_7		0x03
 138
 139#define ADM1026_REG_DAC			0x04
 140#define ADM1026_REG_PWM			0x05
 141
 142#define ADM1026_REG_GPIO_CFG_0_3	0x08
 143#define ADM1026_REG_GPIO_CFG_4_7	0x09
 144#define ADM1026_REG_GPIO_CFG_8_11	0x0a
 145#define ADM1026_REG_GPIO_CFG_12_15	0x0b
 146/* CFG_16 in REG_CFG3 */
 147#define ADM1026_REG_GPIO_STATUS_0_7	0x24
 148#define ADM1026_REG_GPIO_STATUS_8_15	0x25
 149/* STATUS_16 in REG_STATUS4 */
 150#define ADM1026_REG_GPIO_MASK_0_7	0x1c
 151#define ADM1026_REG_GPIO_MASK_8_15	0x1d
 152/* MASK_16 in REG_MASK4 */
 153
 154#define ADM1026_REG_COMPANY		0x16
 155#define ADM1026_REG_VERSTEP		0x17
 156/* These are the recognized values for the above regs */
 157#define ADM1026_COMPANY_ANALOG_DEV	0x41
 158#define ADM1026_VERSTEP_GENERIC		0x40
 159#define ADM1026_VERSTEP_ADM1026		0x44
 160
 161#define ADM1026_REG_MASK1		0x18
 162#define ADM1026_REG_MASK2		0x19
 163#define ADM1026_REG_MASK3		0x1a
 164#define ADM1026_REG_MASK4		0x1b
 165
 166#define ADM1026_REG_STATUS1		0x20
 167#define ADM1026_REG_STATUS2		0x21
 168#define ADM1026_REG_STATUS3		0x22
 169#define ADM1026_REG_STATUS4		0x23
 170
 171#define ADM1026_FAN_ACTIVATION_TEMP_HYST -6
 172#define ADM1026_FAN_CONTROL_TEMP_RANGE	20
 173#define ADM1026_PWM_MAX			255
 174
 175/*
 176 * Conversions. Rounding and limit checking is only done on the TO_REG
 177 * variants. Note that you should be a bit careful with which arguments
 178 * these macros are called: arguments may be evaluated more than once.
 179 */
 180
 181/*
 182 * IN are scaled according to built-in resistors.  These are the
 183 *   voltages corresponding to 3/4 of full scale (192 or 0xc0)
 184 *   NOTE: The -12V input needs an additional factor to account
 185 *      for the Vref pullup resistor.
 186 *      NEG12_OFFSET = SCALE * Vref / V-192 - Vref
 187 *                   = 13875 * 2.50 / 1.875 - 2500
 188 *                   = 16000
 189 *
 190 * The values in this table are based on Table II, page 15 of the
 191 *    datasheet.
 192 */
 193static int adm1026_scaling[] = { /* .001 Volts */
 194		2250, 2250, 2250, 2250, 2250, 2250,
 195		1875, 1875, 1875, 1875, 3000, 3330,
 196		3330, 4995, 2250, 12000, 13875
 197	};
 198#define NEG12_OFFSET  16000
 199#define SCALE(val, from, to) (((val)*(to) + ((from)/2))/(from))
 200#define INS_TO_REG(n, val)	\
 201		SCALE(clamp_val(val, 0, 255 * adm1026_scaling[n] / 192), \
 202		      adm1026_scaling[n], 192)
 203#define INS_FROM_REG(n, val) (SCALE(val, 192, adm1026_scaling[n]))
 204
 205/*
 206 * FAN speed is measured using 22.5kHz clock and counts for 2 pulses
 207 *   and we assume a 2 pulse-per-rev fan tach signal
 208 *      22500 kHz * 60 (sec/min) * 2 (pulse) / 2 (pulse/rev) == 1350000
 209 */
 210#define FAN_TO_REG(val, div)  ((val) <= 0 ? 0xff : \
 211				clamp_val(1350000 / ((val) * (div)), \
 212					      1, 254))
 213#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 0xff ? 0 : \
 214				1350000 / ((val) * (div)))
 215#define DIV_FROM_REG(val) (1 << (val))
 216#define DIV_TO_REG(val) ((val) >= 8 ? 3 : (val) >= 4 ? 2 : (val) >= 2 ? 1 : 0)
 217
 218/* Temperature is reported in 1 degC increments */
 219#define TEMP_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), \
 220					   1000)
 221#define TEMP_FROM_REG(val) ((val) * 1000)
 222#define OFFSET_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), \
 223					     1000)
 224#define OFFSET_FROM_REG(val) ((val) * 1000)
 225
 226#define PWM_TO_REG(val) (clamp_val(val, 0, 255))
 227#define PWM_FROM_REG(val) (val)
 228
 229#define PWM_MIN_TO_REG(val) ((val) & 0xf0)
 230#define PWM_MIN_FROM_REG(val) (((val) & 0xf0) + ((val) >> 4))
 231
 232/*
 233 * Analog output is a voltage, and scaled to millivolts.  The datasheet
 234 *   indicates that the DAC could be used to drive the fans, but in our
 235 *   example board (Arima HDAMA) it isn't connected to the fans at all.
 236 */
 237#define DAC_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val(val, 0, 2500) * 255, \
 238					  2500)
 239#define DAC_FROM_REG(val) (((val) * 2500) / 255)
 240
 241/*
 242 * Chip sampling rates
 243 *
 244 * Some sensors are not updated more frequently than once per second
 245 *    so it doesn't make sense to read them more often than that.
 246 *    We cache the results and return the saved data if the driver
 247 *    is called again before a second has elapsed.
 248 *
 249 * Also, there is significant configuration data for this chip
 250 *    So, we keep the config data up to date in the cache
 251 *    when it is written and only sample it once every 5 *minutes*
 252 */
 253#define ADM1026_DATA_INTERVAL		(1 * HZ)
 254#define ADM1026_CONFIG_INTERVAL		(5 * 60 * HZ)
 255
 256/*
 257 * We allow for multiple chips in a single system.
 258 *
 259 * For each registered ADM1026, we need to keep state information
 260 * at client->data. The adm1026_data structure is dynamically
 261 * allocated, when a new client structure is allocated.
 262 */
 263
 264struct pwm_data {
 265	u8 pwm;
 266	u8 enable;
 267	u8 auto_pwm_min;
 268};
 269
 270struct adm1026_data {
 271	struct i2c_client *client;
 272	const struct attribute_group *groups[3];
 273
 274	struct mutex update_lock;
 275	int valid;		/* !=0 if following fields are valid */
 276	unsigned long last_reading;	/* In jiffies */
 277	unsigned long last_config;	/* In jiffies */
 278
 279	u8 in[17];		/* Register value */
 280	u8 in_max[17];		/* Register value */
 281	u8 in_min[17];		/* Register value */
 282	s8 temp[3];		/* Register value */
 283	s8 temp_min[3];		/* Register value */
 284	s8 temp_max[3];		/* Register value */
 285	s8 temp_tmin[3];	/* Register value */
 286	s8 temp_crit[3];	/* Register value */
 287	s8 temp_offset[3];	/* Register value */
 288	u8 fan[8];		/* Register value */
 289	u8 fan_min[8];		/* Register value */
 290	u8 fan_div[8];		/* Decoded value */
 291	struct pwm_data pwm1;	/* Pwm control values */
 292	u8 vrm;			/* VRM version */
 293	u8 analog_out;		/* Register value (DAC) */
 294	long alarms;		/* Register encoding, combined */
 295	long alarm_mask;	/* Register encoding, combined */
 296	long gpio;		/* Register encoding, combined */
 297	long gpio_mask;		/* Register encoding, combined */
 298	u8 gpio_config[17];	/* Decoded value */
 299	u8 config1;		/* Register value */
 300	u8 config2;		/* Register value */
 301	u8 config3;		/* Register value */
 302};
 303
 304static int adm1026_read_value(struct i2c_client *client, u8 reg)
 305{
 306	int res;
 307
 308	if (reg < 0x80) {
 309		/* "RAM" locations */
 310		res = i2c_smbus_read_byte_data(client, reg) & 0xff;
 311	} else {
 312		/* EEPROM, do nothing */
 313		res = 0;
 314	}
 315	return res;
 316}
 317
 318static int adm1026_write_value(struct i2c_client *client, u8 reg, int value)
 319{
 320	int res;
 321
 322	if (reg < 0x80) {
 323		/* "RAM" locations */
 324		res = i2c_smbus_write_byte_data(client, reg, value);
 325	} else {
 326		/* EEPROM, do nothing */
 327		res = 0;
 328	}
 329	return res;
 330}
 331
 332static struct adm1026_data *adm1026_update_device(struct device *dev)
 333{
 334	struct adm1026_data *data = dev_get_drvdata(dev);
 335	struct i2c_client *client = data->client;
 336	int i;
 337	long value, alarms, gpio;
 338
 339	mutex_lock(&data->update_lock);
 340	if (!data->valid
 341	    || time_after(jiffies,
 342			  data->last_reading + ADM1026_DATA_INTERVAL)) {
 343		/* Things that change quickly */
 344		dev_dbg(&client->dev, "Reading sensor values\n");
 345		for (i = 0; i <= 16; ++i) {
 346			data->in[i] =
 347			    adm1026_read_value(client, ADM1026_REG_IN[i]);
 348		}
 349
 350		for (i = 0; i <= 7; ++i) {
 351			data->fan[i] =
 352			    adm1026_read_value(client, ADM1026_REG_FAN(i));
 353		}
 354
 355		for (i = 0; i <= 2; ++i) {
 356			/*
 357			 * NOTE: temp[] is s8 and we assume 2's complement
 358			 *   "conversion" in the assignment
 359			 */
 360			data->temp[i] =
 361			    adm1026_read_value(client, ADM1026_REG_TEMP[i]);
 362		}
 363
 364		data->pwm1.pwm = adm1026_read_value(client,
 365			ADM1026_REG_PWM);
 366		data->analog_out = adm1026_read_value(client,
 367			ADM1026_REG_DAC);
 368		/* GPIO16 is MSbit of alarms, move it to gpio */
 369		alarms = adm1026_read_value(client, ADM1026_REG_STATUS4);
 370		gpio = alarms & 0x80 ? 0x0100 : 0; /* GPIO16 */
 371		alarms &= 0x7f;
 372		alarms <<= 8;
 373		alarms |= adm1026_read_value(client, ADM1026_REG_STATUS3);
 374		alarms <<= 8;
 375		alarms |= adm1026_read_value(client, ADM1026_REG_STATUS2);
 376		alarms <<= 8;
 377		alarms |= adm1026_read_value(client, ADM1026_REG_STATUS1);
 378		data->alarms = alarms;
 379
 380		/* Read the GPIO values */
 381		gpio |= adm1026_read_value(client,
 382			ADM1026_REG_GPIO_STATUS_8_15);
 383		gpio <<= 8;
 384		gpio |= adm1026_read_value(client,
 385			ADM1026_REG_GPIO_STATUS_0_7);
 386		data->gpio = gpio;
 387
 388		data->last_reading = jiffies;
 389	}	/* last_reading */
 390
 391	if (!data->valid ||
 392	    time_after(jiffies, data->last_config + ADM1026_CONFIG_INTERVAL)) {
 393		/* Things that don't change often */
 394		dev_dbg(&client->dev, "Reading config values\n");
 395		for (i = 0; i <= 16; ++i) {
 396			data->in_min[i] = adm1026_read_value(client,
 397				ADM1026_REG_IN_MIN[i]);
 398			data->in_max[i] = adm1026_read_value(client,
 399				ADM1026_REG_IN_MAX[i]);
 400		}
 401
 402		value = adm1026_read_value(client, ADM1026_REG_FAN_DIV_0_3)
 403			| (adm1026_read_value(client, ADM1026_REG_FAN_DIV_4_7)
 404			<< 8);
 405		for (i = 0; i <= 7; ++i) {
 406			data->fan_min[i] = adm1026_read_value(client,
 407				ADM1026_REG_FAN_MIN(i));
 408			data->fan_div[i] = DIV_FROM_REG(value & 0x03);
 409			value >>= 2;
 410		}
 411
 412		for (i = 0; i <= 2; ++i) {
 413			/*
 414			 * NOTE: temp_xxx[] are s8 and we assume 2's
 415			 *    complement "conversion" in the assignment
 416			 */
 417			data->temp_min[i] = adm1026_read_value(client,
 418				ADM1026_REG_TEMP_MIN[i]);
 419			data->temp_max[i] = adm1026_read_value(client,
 420				ADM1026_REG_TEMP_MAX[i]);
 421			data->temp_tmin[i] = adm1026_read_value(client,
 422				ADM1026_REG_TEMP_TMIN[i]);
 423			data->temp_crit[i] = adm1026_read_value(client,
 424				ADM1026_REG_TEMP_THERM[i]);
 425			data->temp_offset[i] = adm1026_read_value(client,
 426				ADM1026_REG_TEMP_OFFSET[i]);
 427		}
 428
 429		/* Read the STATUS/alarm masks */
 430		alarms = adm1026_read_value(client, ADM1026_REG_MASK4);
 431		gpio = alarms & 0x80 ? 0x0100 : 0; /* GPIO16 */
 432		alarms = (alarms & 0x7f) << 8;
 433		alarms |= adm1026_read_value(client, ADM1026_REG_MASK3);
 434		alarms <<= 8;
 435		alarms |= adm1026_read_value(client, ADM1026_REG_MASK2);
 436		alarms <<= 8;
 437		alarms |= adm1026_read_value(client, ADM1026_REG_MASK1);
 438		data->alarm_mask = alarms;
 439
 440		/* Read the GPIO values */
 441		gpio |= adm1026_read_value(client,
 442			ADM1026_REG_GPIO_MASK_8_15);
 443		gpio <<= 8;
 444		gpio |= adm1026_read_value(client, ADM1026_REG_GPIO_MASK_0_7);
 445		data->gpio_mask = gpio;
 446
 447		/* Read various values from CONFIG1 */
 448		data->config1 = adm1026_read_value(client,
 449			ADM1026_REG_CONFIG1);
 450		if (data->config1 & CFG1_PWM_AFC) {
 451			data->pwm1.enable = 2;
 452			data->pwm1.auto_pwm_min =
 453				PWM_MIN_FROM_REG(data->pwm1.pwm);
 454		}
 455		/* Read the GPIO config */
 456		data->config2 = adm1026_read_value(client,
 457			ADM1026_REG_CONFIG2);
 458		data->config3 = adm1026_read_value(client,
 459			ADM1026_REG_CONFIG3);
 460		data->gpio_config[16] = (data->config3 >> 6) & 0x03;
 461
 462		value = 0;
 463		for (i = 0; i <= 15; ++i) {
 464			if ((i & 0x03) == 0) {
 465				value = adm1026_read_value(client,
 466					    ADM1026_REG_GPIO_CFG_0_3 + i/4);
 467			}
 468			data->gpio_config[i] = value & 0x03;
 469			value >>= 2;
 470		}
 471
 472		data->last_config = jiffies;
 473	}	/* last_config */
 474
 475	data->valid = 1;
 476	mutex_unlock(&data->update_lock);
 477	return data;
 478}
 479
 480static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 481		char *buf)
 482{
 483	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 484	int nr = sensor_attr->index;
 485	struct adm1026_data *data = adm1026_update_device(dev);
 486	return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in[nr]));
 487}
 488static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 489		char *buf)
 490{
 491	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 492	int nr = sensor_attr->index;
 493	struct adm1026_data *data = adm1026_update_device(dev);
 494	return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr]));
 495}
 496static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 497		const char *buf, size_t count)
 498{
 499	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 500	int nr = sensor_attr->index;
 501	struct adm1026_data *data = dev_get_drvdata(dev);
 502	struct i2c_client *client = data->client;
 503	long val;
 504	int err;
 505
 506	err = kstrtol(buf, 10, &val);
 507	if (err)
 508		return err;
 509
 510	mutex_lock(&data->update_lock);
 511	data->in_min[nr] = INS_TO_REG(nr, val);
 512	adm1026_write_value(client, ADM1026_REG_IN_MIN[nr], data->in_min[nr]);
 513	mutex_unlock(&data->update_lock);
 514	return count;
 515}
 516static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 517		char *buf)
 518{
 519	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 520	int nr = sensor_attr->index;
 521	struct adm1026_data *data = adm1026_update_device(dev);
 522	return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr]));
 523}
 524static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 525		const char *buf, size_t count)
 526{
 527	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 528	int nr = sensor_attr->index;
 529	struct adm1026_data *data = dev_get_drvdata(dev);
 530	struct i2c_client *client = data->client;
 531	long val;
 532	int err;
 533
 534	err = kstrtol(buf, 10, &val);
 535	if (err)
 536		return err;
 537
 538	mutex_lock(&data->update_lock);
 539	data->in_max[nr] = INS_TO_REG(nr, val);
 540	adm1026_write_value(client, ADM1026_REG_IN_MAX[nr], data->in_max[nr]);
 541	mutex_unlock(&data->update_lock);
 542	return count;
 543}
 544
 545#define in_reg(offset)						\
 546static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in,	\
 547		NULL, offset);					\
 548static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,	\
 549		show_in_min, set_in_min, offset);		\
 550static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,	\
 551		show_in_max, set_in_max, offset);
 552
 553
 554in_reg(0);
 555in_reg(1);
 556in_reg(2);
 557in_reg(3);
 558in_reg(4);
 559in_reg(5);
 560in_reg(6);
 561in_reg(7);
 562in_reg(8);
 563in_reg(9);
 564in_reg(10);
 565in_reg(11);
 566in_reg(12);
 567in_reg(13);
 568in_reg(14);
 569in_reg(15);
 570
 571static ssize_t show_in16(struct device *dev, struct device_attribute *attr,
 572			 char *buf)
 573{
 574	struct adm1026_data *data = adm1026_update_device(dev);
 575	return sprintf(buf, "%d\n", INS_FROM_REG(16, data->in[16]) -
 576		NEG12_OFFSET);
 577}
 578static ssize_t show_in16_min(struct device *dev, struct device_attribute *attr,
 579			     char *buf)
 580{
 581	struct adm1026_data *data = adm1026_update_device(dev);
 582	return sprintf(buf, "%d\n", INS_FROM_REG(16, data->in_min[16])
 583		- NEG12_OFFSET);
 584}
 585static ssize_t set_in16_min(struct device *dev, struct device_attribute *attr,
 586			    const char *buf, size_t count)
 587{
 588	struct adm1026_data *data = dev_get_drvdata(dev);
 589	struct i2c_client *client = data->client;
 590	long val;
 591	int err;
 592
 593	err = kstrtol(buf, 10, &val);
 594	if (err)
 595		return err;
 596
 597	mutex_lock(&data->update_lock);
 598	data->in_min[16] = INS_TO_REG(16,
 599				      clamp_val(val, INT_MIN,
 600						INT_MAX - NEG12_OFFSET) +
 601				      NEG12_OFFSET);
 602	adm1026_write_value(client, ADM1026_REG_IN_MIN[16], data->in_min[16]);
 603	mutex_unlock(&data->update_lock);
 604	return count;
 605}
 606static ssize_t show_in16_max(struct device *dev, struct device_attribute *attr,
 607			     char *buf)
 608{
 609	struct adm1026_data *data = adm1026_update_device(dev);
 610	return sprintf(buf, "%d\n", INS_FROM_REG(16, data->in_max[16])
 611			- NEG12_OFFSET);
 612}
 613static ssize_t set_in16_max(struct device *dev, struct device_attribute *attr,
 614			    const char *buf, size_t count)
 615{
 616	struct adm1026_data *data = dev_get_drvdata(dev);
 617	struct i2c_client *client = data->client;
 618	long val;
 619	int err;
 620
 621	err = kstrtol(buf, 10, &val);
 622	if (err)
 623		return err;
 624
 625	mutex_lock(&data->update_lock);
 626	data->in_max[16] = INS_TO_REG(16,
 627				      clamp_val(val, INT_MIN,
 628						INT_MAX - NEG12_OFFSET) +
 629				      NEG12_OFFSET);
 630	adm1026_write_value(client, ADM1026_REG_IN_MAX[16], data->in_max[16]);
 631	mutex_unlock(&data->update_lock);
 632	return count;
 633}
 634
 635static SENSOR_DEVICE_ATTR(in16_input, S_IRUGO, show_in16, NULL, 16);
 636static SENSOR_DEVICE_ATTR(in16_min, S_IRUGO | S_IWUSR, show_in16_min,
 637			  set_in16_min, 16);
 638static SENSOR_DEVICE_ATTR(in16_max, S_IRUGO | S_IWUSR, show_in16_max,
 639			  set_in16_max, 16);
 640
 641
 642/* Now add fan read/write functions */
 643
 644static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 645		char *buf)
 646{
 647	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 648	int nr = sensor_attr->index;
 649	struct adm1026_data *data = adm1026_update_device(dev);
 650	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 651		data->fan_div[nr]));
 652}
 653static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
 654		char *buf)
 655{
 656	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 657	int nr = sensor_attr->index;
 658	struct adm1026_data *data = adm1026_update_device(dev);
 659	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 660		data->fan_div[nr]));
 661}
 662static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 663		const char *buf, size_t count)
 664{
 665	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 666	int nr = sensor_attr->index;
 667	struct adm1026_data *data = dev_get_drvdata(dev);
 668	struct i2c_client *client = data->client;
 669	long val;
 670	int err;
 671
 672	err = kstrtol(buf, 10, &val);
 673	if (err)
 674		return err;
 675
 676	mutex_lock(&data->update_lock);
 677	data->fan_min[nr] = FAN_TO_REG(val, data->fan_div[nr]);
 678	adm1026_write_value(client, ADM1026_REG_FAN_MIN(nr),
 679		data->fan_min[nr]);
 680	mutex_unlock(&data->update_lock);
 681	return count;
 682}
 683
 684#define fan_offset(offset)						\
 685static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan, NULL,	\
 686		offset - 1);						\
 687static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,		\
 688		show_fan_min, set_fan_min, offset - 1);
 689
 690fan_offset(1);
 691fan_offset(2);
 692fan_offset(3);
 693fan_offset(4);
 694fan_offset(5);
 695fan_offset(6);
 696fan_offset(7);
 697fan_offset(8);
 698
 699/* Adjust fan_min to account for new fan divisor */
 700static void fixup_fan_min(struct device *dev, int fan, int old_div)
 701{
 702	struct adm1026_data *data = dev_get_drvdata(dev);
 703	struct i2c_client *client = data->client;
 704	int new_min;
 705	int new_div = data->fan_div[fan];
 706
 707	/* 0 and 0xff are special.  Don't adjust them */
 708	if (data->fan_min[fan] == 0 || data->fan_min[fan] == 0xff)
 709		return;
 710
 711	new_min = data->fan_min[fan] * old_div / new_div;
 712	new_min = clamp_val(new_min, 1, 254);
 713	data->fan_min[fan] = new_min;
 714	adm1026_write_value(client, ADM1026_REG_FAN_MIN(fan), new_min);
 715}
 716
 717/* Now add fan_div read/write functions */
 718static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 719		char *buf)
 720{
 721	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 722	int nr = sensor_attr->index;
 723	struct adm1026_data *data = adm1026_update_device(dev);
 724	return sprintf(buf, "%d\n", data->fan_div[nr]);
 725}
 726static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 727		const char *buf, size_t count)
 728{
 729	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 730	int nr = sensor_attr->index;
 731	struct adm1026_data *data = dev_get_drvdata(dev);
 732	struct i2c_client *client = data->client;
 733	long val;
 734	int orig_div, new_div;
 735	int err;
 736
 737	err = kstrtol(buf, 10, &val);
 738	if (err)
 739		return err;
 740
 741	new_div = DIV_TO_REG(val);
 742
 743	mutex_lock(&data->update_lock);
 744	orig_div = data->fan_div[nr];
 745	data->fan_div[nr] = DIV_FROM_REG(new_div);
 746
 747	if (nr < 4) { /* 0 <= nr < 4 */
 748		adm1026_write_value(client, ADM1026_REG_FAN_DIV_0_3,
 749				    (DIV_TO_REG(data->fan_div[0]) << 0) |
 750				    (DIV_TO_REG(data->fan_div[1]) << 2) |
 751				    (DIV_TO_REG(data->fan_div[2]) << 4) |
 752				    (DIV_TO_REG(data->fan_div[3]) << 6));
 753	} else { /* 3 < nr < 8 */
 754		adm1026_write_value(client, ADM1026_REG_FAN_DIV_4_7,
 755				    (DIV_TO_REG(data->fan_div[4]) << 0) |
 756				    (DIV_TO_REG(data->fan_div[5]) << 2) |
 757				    (DIV_TO_REG(data->fan_div[6]) << 4) |
 758				    (DIV_TO_REG(data->fan_div[7]) << 6));
 759	}
 760
 761	if (data->fan_div[nr] != orig_div)
 762		fixup_fan_min(dev, nr, orig_div);
 763
 764	mutex_unlock(&data->update_lock);
 765	return count;
 766}
 767
 768#define fan_offset_div(offset)						\
 769static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,		\
 770		show_fan_div, set_fan_div, offset - 1);
 771
 772fan_offset_div(1);
 773fan_offset_div(2);
 774fan_offset_div(3);
 775fan_offset_div(4);
 776fan_offset_div(5);
 777fan_offset_div(6);
 778fan_offset_div(7);
 779fan_offset_div(8);
 780
 781/* Temps */
 782static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 783		char *buf)
 784{
 785	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 786	int nr = sensor_attr->index;
 787	struct adm1026_data *data = adm1026_update_device(dev);
 788	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
 789}
 790static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
 791		char *buf)
 792{
 793	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 794	int nr = sensor_attr->index;
 795	struct adm1026_data *data = adm1026_update_device(dev);
 796	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
 797}
 798static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 799		const char *buf, size_t count)
 800{
 801	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 802	int nr = sensor_attr->index;
 803	struct adm1026_data *data = dev_get_drvdata(dev);
 804	struct i2c_client *client = data->client;
 805	long val;
 806	int err;
 807
 808	err = kstrtol(buf, 10, &val);
 809	if (err)
 810		return err;
 811
 812	mutex_lock(&data->update_lock);
 813	data->temp_min[nr] = TEMP_TO_REG(val);
 814	adm1026_write_value(client, ADM1026_REG_TEMP_MIN[nr],
 815		data->temp_min[nr]);
 816	mutex_unlock(&data->update_lock);
 817	return count;
 818}
 819static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 820		char *buf)
 821{
 822	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 823	int nr = sensor_attr->index;
 824	struct adm1026_data *data = adm1026_update_device(dev);
 825	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
 826}
 827static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 828		const char *buf, size_t count)
 829{
 830	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 831	int nr = sensor_attr->index;
 832	struct adm1026_data *data = dev_get_drvdata(dev);
 833	struct i2c_client *client = data->client;
 834	long val;
 835	int err;
 836
 837	err = kstrtol(buf, 10, &val);
 838	if (err)
 839		return err;
 840
 841	mutex_lock(&data->update_lock);
 842	data->temp_max[nr] = TEMP_TO_REG(val);
 843	adm1026_write_value(client, ADM1026_REG_TEMP_MAX[nr],
 844		data->temp_max[nr]);
 845	mutex_unlock(&data->update_lock);
 846	return count;
 847}
 848
 849#define temp_reg(offset)						\
 850static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp,	\
 851		NULL, offset - 1);					\
 852static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,	\
 853		show_temp_min, set_temp_min, offset - 1);		\
 854static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,	\
 855		show_temp_max, set_temp_max, offset - 1);
 856
 857
 858temp_reg(1);
 859temp_reg(2);
 860temp_reg(3);
 861
 862static ssize_t show_temp_offset(struct device *dev,
 863		struct device_attribute *attr, char *buf)
 864{
 865	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 866	int nr = sensor_attr->index;
 867	struct adm1026_data *data = adm1026_update_device(dev);
 868	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr]));
 869}
 870static ssize_t set_temp_offset(struct device *dev,
 871		struct device_attribute *attr, const char *buf,
 872		size_t count)
 873{
 874	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 875	int nr = sensor_attr->index;
 876	struct adm1026_data *data = dev_get_drvdata(dev);
 877	struct i2c_client *client = data->client;
 878	long val;
 879	int err;
 880
 881	err = kstrtol(buf, 10, &val);
 882	if (err)
 883		return err;
 884
 885	mutex_lock(&data->update_lock);
 886	data->temp_offset[nr] = TEMP_TO_REG(val);
 887	adm1026_write_value(client, ADM1026_REG_TEMP_OFFSET[nr],
 888		data->temp_offset[nr]);
 889	mutex_unlock(&data->update_lock);
 890	return count;
 891}
 892
 893#define temp_offset_reg(offset)						\
 894static SENSOR_DEVICE_ATTR(temp##offset##_offset, S_IRUGO | S_IWUSR,	\
 895		show_temp_offset, set_temp_offset, offset - 1);
 896
 897temp_offset_reg(1);
 898temp_offset_reg(2);
 899temp_offset_reg(3);
 900
 901static ssize_t show_temp_auto_point1_temp_hyst(struct device *dev,
 902		struct device_attribute *attr, char *buf)
 903{
 904	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 905	int nr = sensor_attr->index;
 906	struct adm1026_data *data = adm1026_update_device(dev);
 907	return sprintf(buf, "%d\n", TEMP_FROM_REG(
 908		ADM1026_FAN_ACTIVATION_TEMP_HYST + data->temp_tmin[nr]));
 909}
 910static ssize_t show_temp_auto_point2_temp(struct device *dev,
 911		struct device_attribute *attr, char *buf)
 912{
 913	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 914	int nr = sensor_attr->index;
 915	struct adm1026_data *data = adm1026_update_device(dev);
 916	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_tmin[nr] +
 917		ADM1026_FAN_CONTROL_TEMP_RANGE));
 918}
 919static ssize_t show_temp_auto_point1_temp(struct device *dev,
 920		struct device_attribute *attr, char *buf)
 921{
 922	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 923	int nr = sensor_attr->index;
 924	struct adm1026_data *data = adm1026_update_device(dev);
 925	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_tmin[nr]));
 926}
 927static ssize_t set_temp_auto_point1_temp(struct device *dev,
 928		struct device_attribute *attr, const char *buf, size_t count)
 929{
 930	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 931	int nr = sensor_attr->index;
 932	struct adm1026_data *data = dev_get_drvdata(dev);
 933	struct i2c_client *client = data->client;
 934	long val;
 935	int err;
 936
 937	err = kstrtol(buf, 10, &val);
 938	if (err)
 939		return err;
 940
 941	mutex_lock(&data->update_lock);
 942	data->temp_tmin[nr] = TEMP_TO_REG(val);
 943	adm1026_write_value(client, ADM1026_REG_TEMP_TMIN[nr],
 944		data->temp_tmin[nr]);
 945	mutex_unlock(&data->update_lock);
 946	return count;
 947}
 948
 949#define temp_auto_point(offset)						\
 950static SENSOR_DEVICE_ATTR(temp##offset##_auto_point1_temp,		\
 951		S_IRUGO | S_IWUSR, show_temp_auto_point1_temp,		\
 952		set_temp_auto_point1_temp, offset - 1);			\
 953static SENSOR_DEVICE_ATTR(temp##offset##_auto_point1_temp_hyst, S_IRUGO,\
 954		show_temp_auto_point1_temp_hyst, NULL, offset - 1);	\
 955static SENSOR_DEVICE_ATTR(temp##offset##_auto_point2_temp, S_IRUGO,	\
 956		show_temp_auto_point2_temp, NULL, offset - 1);
 957
 958temp_auto_point(1);
 959temp_auto_point(2);
 960temp_auto_point(3);
 961
 962static ssize_t show_temp_crit_enable(struct device *dev,
 963		struct device_attribute *attr, char *buf)
 964{
 965	struct adm1026_data *data = adm1026_update_device(dev);
 966	return sprintf(buf, "%d\n", (data->config1 & CFG1_THERM_HOT) >> 4);
 967}
 968static ssize_t set_temp_crit_enable(struct device *dev,
 969		struct device_attribute *attr, const char *buf, size_t count)
 970{
 971	struct adm1026_data *data = dev_get_drvdata(dev);
 972	struct i2c_client *client = data->client;
 973	unsigned long val;
 974	int err;
 975
 976	err = kstrtoul(buf, 10, &val);
 977	if (err)
 978		return err;
 979
 980	if (val > 1)
 981		return -EINVAL;
 982
 983	mutex_lock(&data->update_lock);
 984	data->config1 = (data->config1 & ~CFG1_THERM_HOT) | (val << 4);
 985	adm1026_write_value(client, ADM1026_REG_CONFIG1, data->config1);
 986	mutex_unlock(&data->update_lock);
 987
 988	return count;
 989}
 990
 991#define temp_crit_enable(offset)				\
 992static DEVICE_ATTR(temp##offset##_crit_enable, S_IRUGO | S_IWUSR, \
 993	show_temp_crit_enable, set_temp_crit_enable);
 994
 995temp_crit_enable(1);
 996temp_crit_enable(2);
 997temp_crit_enable(3);
 998
 999static ssize_t show_temp_crit(struct device *dev,
1000		struct device_attribute *attr, char *buf)
1001{
1002	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1003	int nr = sensor_attr->index;
1004	struct adm1026_data *data = adm1026_update_device(dev);
1005	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
1006}
1007static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr,
1008		const char *buf, size_t count)
1009{
1010	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1011	int nr = sensor_attr->index;
1012	struct adm1026_data *data = dev_get_drvdata(dev);
1013	struct i2c_client *client = data->client;
1014	long val;
1015	int err;
1016
1017	err = kstrtol(buf, 10, &val);
1018	if (err)
1019		return err;
1020
1021	mutex_lock(&data->update_lock);
1022	data->temp_crit[nr] = TEMP_TO_REG(val);
1023	adm1026_write_value(client, ADM1026_REG_TEMP_THERM[nr],
1024		data->temp_crit[nr]);
1025	mutex_unlock(&data->update_lock);
1026	return count;
1027}
1028
1029#define temp_crit_reg(offset)						\
1030static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR,	\
1031		show_temp_crit, set_temp_crit, offset - 1);
1032
1033temp_crit_reg(1);
1034temp_crit_reg(2);
1035temp_crit_reg(3);
1036
1037static ssize_t show_analog_out_reg(struct device *dev,
1038				   struct device_attribute *attr, char *buf)
1039{
1040	struct adm1026_data *data = adm1026_update_device(dev);
1041	return sprintf(buf, "%d\n", DAC_FROM_REG(data->analog_out));
1042}
1043static ssize_t set_analog_out_reg(struct device *dev,
1044				  struct device_attribute *attr,
1045				  const char *buf, size_t count)
1046{
1047	struct adm1026_data *data = dev_get_drvdata(dev);
1048	struct i2c_client *client = data->client;
1049	long val;
1050	int err;
1051
1052	err = kstrtol(buf, 10, &val);
1053	if (err)
1054		return err;
1055
1056	mutex_lock(&data->update_lock);
1057	data->analog_out = DAC_TO_REG(val);
1058	adm1026_write_value(client, ADM1026_REG_DAC, data->analog_out);
1059	mutex_unlock(&data->update_lock);
1060	return count;
1061}
1062
1063static DEVICE_ATTR(analog_out, S_IRUGO | S_IWUSR, show_analog_out_reg,
1064	set_analog_out_reg);
1065
1066static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1067			    char *buf)
1068{
1069	struct adm1026_data *data = adm1026_update_device(dev);
1070	int vid = (data->gpio >> 11) & 0x1f;
1071
1072	dev_dbg(dev, "Setting VID from GPIO11-15.\n");
1073	return sprintf(buf, "%d\n", vid_from_reg(vid, data->vrm));
1074}
1075
1076static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1077
1078static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1079			    char *buf)
1080{
1081	struct adm1026_data *data = dev_get_drvdata(dev);
1082	return sprintf(buf, "%d\n", data->vrm);
1083}
1084
1085static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1086			     const char *buf, size_t count)
1087{
1088	struct adm1026_data *data = dev_get_drvdata(dev);
1089	unsigned long val;
1090	int err;
1091
1092	err = kstrtoul(buf, 10, &val);
1093	if (err)
1094		return err;
1095
1096	if (val > 255)
1097		return -EINVAL;
1098
1099	data->vrm = val;
1100	return count;
1101}
1102
1103static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1104
1105static ssize_t show_alarms_reg(struct device *dev,
1106			       struct device_attribute *attr, char *buf)
1107{
1108	struct adm1026_data *data = adm1026_update_device(dev);
1109	return sprintf(buf, "%ld\n", data->alarms);
1110}
1111
1112static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
1113
1114static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1115			  char *buf)
1116{
1117	struct adm1026_data *data = adm1026_update_device(dev);
1118	int bitnr = to_sensor_dev_attr(attr)->index;
1119	return sprintf(buf, "%ld\n", (data->alarms >> bitnr) & 1);
1120}
1121
1122static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0);
1123static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
1124static SENSOR_DEVICE_ATTR(in9_alarm, S_IRUGO, show_alarm, NULL, 1);
1125static SENSOR_DEVICE_ATTR(in11_alarm, S_IRUGO, show_alarm, NULL, 2);
1126static SENSOR_DEVICE_ATTR(in12_alarm, S_IRUGO, show_alarm, NULL, 3);
1127static SENSOR_DEVICE_ATTR(in13_alarm, S_IRUGO, show_alarm, NULL, 4);
1128static SENSOR_DEVICE_ATTR(in14_alarm, S_IRUGO, show_alarm, NULL, 5);
1129static SENSOR_DEVICE_ATTR(in15_alarm, S_IRUGO, show_alarm, NULL, 6);
1130static SENSOR_DEVICE_ATTR(in16_alarm, S_IRUGO, show_alarm, NULL, 7);
1131static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1132static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1133static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1134static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1135static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1136static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1137static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1138static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1139static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 16);
1140static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 17);
1141static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 18);
1142static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 19);
1143static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 20);
1144static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_alarm, NULL, 21);
1145static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_alarm, NULL, 22);
1146static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_alarm, NULL, 23);
1147static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 24);
1148static SENSOR_DEVICE_ATTR(in10_alarm, S_IRUGO, show_alarm, NULL, 25);
1149static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 26);
1150
1151static ssize_t show_alarm_mask(struct device *dev,
1152			       struct device_attribute *attr, char *buf)
1153{
1154	struct adm1026_data *data = adm1026_update_device(dev);
1155	return sprintf(buf, "%ld\n", data->alarm_mask);
1156}
1157static ssize_t set_alarm_mask(struct device *dev, struct device_attribute *attr,
1158			      const char *buf, size_t count)
1159{
1160	struct adm1026_data *data = dev_get_drvdata(dev);
1161	struct i2c_client *client = data->client;
1162	unsigned long mask;
1163	long val;
1164	int err;
1165
1166	err = kstrtol(buf, 10, &val);
1167	if (err)
1168		return err;
1169
1170	mutex_lock(&data->update_lock);
1171	data->alarm_mask = val & 0x7fffffff;
1172	mask = data->alarm_mask
1173		| (data->gpio_mask & 0x10000 ? 0x80000000 : 0);
1174	adm1026_write_value(client, ADM1026_REG_MASK1,
1175		mask & 0xff);
1176	mask >>= 8;
1177	adm1026_write_value(client, ADM1026_REG_MASK2,
1178		mask & 0xff);
1179	mask >>= 8;
1180	adm1026_write_value(client, ADM1026_REG_MASK3,
1181		mask & 0xff);
1182	mask >>= 8;
1183	adm1026_write_value(client, ADM1026_REG_MASK4,
1184		mask & 0xff);
1185	mutex_unlock(&data->update_lock);
1186	return count;
1187}
1188
1189static DEVICE_ATTR(alarm_mask, S_IRUGO | S_IWUSR, show_alarm_mask,
1190	set_alarm_mask);
1191
1192
1193static ssize_t show_gpio(struct device *dev, struct device_attribute *attr,
1194			 char *buf)
1195{
1196	struct adm1026_data *data = adm1026_update_device(dev);
1197	return sprintf(buf, "%ld\n", data->gpio);
1198}
1199static ssize_t set_gpio(struct device *dev, struct device_attribute *attr,
1200			const char *buf, size_t count)
1201{
1202	struct adm1026_data *data = dev_get_drvdata(dev);
1203	struct i2c_client *client = data->client;
1204	long gpio;
1205	long val;
1206	int err;
1207
1208	err = kstrtol(buf, 10, &val);
1209	if (err)
1210		return err;
1211
1212	mutex_lock(&data->update_lock);
1213	data->gpio = val & 0x1ffff;
1214	gpio = data->gpio;
1215	adm1026_write_value(client, ADM1026_REG_GPIO_STATUS_0_7, gpio & 0xff);
1216	gpio >>= 8;
1217	adm1026_write_value(client, ADM1026_REG_GPIO_STATUS_8_15, gpio & 0xff);
1218	gpio = ((gpio >> 1) & 0x80) | (data->alarms >> 24 & 0x7f);
1219	adm1026_write_value(client, ADM1026_REG_STATUS4, gpio & 0xff);
1220	mutex_unlock(&data->update_lock);
1221	return count;
1222}
1223
1224static DEVICE_ATTR(gpio, S_IRUGO | S_IWUSR, show_gpio, set_gpio);
1225
1226static ssize_t show_gpio_mask(struct device *dev, struct device_attribute *attr,
1227			      char *buf)
1228{
1229	struct adm1026_data *data = adm1026_update_device(dev);
1230	return sprintf(buf, "%ld\n", data->gpio_mask);
1231}
1232static ssize_t set_gpio_mask(struct device *dev, struct device_attribute *attr,
1233			     const char *buf, size_t count)
1234{
1235	struct adm1026_data *data = dev_get_drvdata(dev);
1236	struct i2c_client *client = data->client;
1237	long mask;
1238	long val;
1239	int err;
1240
1241	err = kstrtol(buf, 10, &val);
1242	if (err)
1243		return err;
1244
1245	mutex_lock(&data->update_lock);
1246	data->gpio_mask = val & 0x1ffff;
1247	mask = data->gpio_mask;
1248	adm1026_write_value(client, ADM1026_REG_GPIO_MASK_0_7, mask & 0xff);
1249	mask >>= 8;
1250	adm1026_write_value(client, ADM1026_REG_GPIO_MASK_8_15, mask & 0xff);
1251	mask = ((mask >> 1) & 0x80) | (data->alarm_mask >> 24 & 0x7f);
1252	adm1026_write_value(client, ADM1026_REG_MASK1, mask & 0xff);
1253	mutex_unlock(&data->update_lock);
1254	return count;
1255}
1256
1257static DEVICE_ATTR(gpio_mask, S_IRUGO | S_IWUSR, show_gpio_mask, set_gpio_mask);
1258
1259static ssize_t show_pwm_reg(struct device *dev, struct device_attribute *attr,
1260			    char *buf)
1261{
1262	struct adm1026_data *data = adm1026_update_device(dev);
1263	return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm1.pwm));
1264}
1265
1266static ssize_t set_pwm_reg(struct device *dev, struct device_attribute *attr,
1267			   const char *buf, size_t count)
1268{
1269	struct adm1026_data *data = dev_get_drvdata(dev);
1270	struct i2c_client *client = data->client;
1271
1272	if (data->pwm1.enable == 1) {
1273		long val;
1274		int err;
1275
1276		err = kstrtol(buf, 10, &val);
1277		if (err)
1278			return err;
1279
1280		mutex_lock(&data->update_lock);
1281		data->pwm1.pwm = PWM_TO_REG(val);
1282		adm1026_write_value(client, ADM1026_REG_PWM, data->pwm1.pwm);
1283		mutex_unlock(&data->update_lock);
1284	}
1285	return count;
1286}
1287
1288static ssize_t show_auto_pwm_min(struct device *dev,
1289				 struct device_attribute *attr, char *buf)
1290{
1291	struct adm1026_data *data = adm1026_update_device(dev);
1292	return sprintf(buf, "%d\n", data->pwm1.auto_pwm_min);
1293}
1294
1295static ssize_t set_auto_pwm_min(struct device *dev,
1296				struct device_attribute *attr, const char *buf,
1297				size_t count)
1298{
1299	struct adm1026_data *data = dev_get_drvdata(dev);
1300	struct i2c_client *client = data->client;
1301	unsigned long val;
1302	int err;
1303
1304	err = kstrtoul(buf, 10, &val);
1305	if (err)
1306		return err;
1307
1308	mutex_lock(&data->update_lock);
1309	data->pwm1.auto_pwm_min = clamp_val(val, 0, 255);
1310	if (data->pwm1.enable == 2) { /* apply immediately */
1311		data->pwm1.pwm = PWM_TO_REG((data->pwm1.pwm & 0x0f) |
1312			PWM_MIN_TO_REG(data->pwm1.auto_pwm_min));
1313		adm1026_write_value(client, ADM1026_REG_PWM, data->pwm1.pwm);
1314	}
1315	mutex_unlock(&data->update_lock);
1316	return count;
1317}
1318
1319static ssize_t show_auto_pwm_max(struct device *dev,
1320				 struct device_attribute *attr, char *buf)
1321{
1322	return sprintf(buf, "%d\n", ADM1026_PWM_MAX);
1323}
1324
1325static ssize_t show_pwm_enable(struct device *dev,
1326			       struct device_attribute *attr, char *buf)
1327{
1328	struct adm1026_data *data = adm1026_update_device(dev);
1329	return sprintf(buf, "%d\n", data->pwm1.enable);
1330}
1331
1332static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
1333			      const char *buf, size_t count)
1334{
1335	struct adm1026_data *data = dev_get_drvdata(dev);
1336	struct i2c_client *client = data->client;
1337	int old_enable;
1338	unsigned long val;
1339	int err;
1340
1341	err = kstrtoul(buf, 10, &val);
1342	if (err)
1343		return err;
1344
1345	if (val >= 3)
1346		return -EINVAL;
1347
1348	mutex_lock(&data->update_lock);
1349	old_enable = data->pwm1.enable;
1350	data->pwm1.enable = val;
1351	data->config1 = (data->config1 & ~CFG1_PWM_AFC)
1352			| ((val == 2) ? CFG1_PWM_AFC : 0);
1353	adm1026_write_value(client, ADM1026_REG_CONFIG1, data->config1);
1354	if (val == 2) { /* apply pwm1_auto_pwm_min to pwm1 */
1355		data->pwm1.pwm = PWM_TO_REG((data->pwm1.pwm & 0x0f) |
1356			PWM_MIN_TO_REG(data->pwm1.auto_pwm_min));
1357		adm1026_write_value(client, ADM1026_REG_PWM, data->pwm1.pwm);
1358	} else if (!((old_enable == 1) && (val == 1))) {
1359		/* set pwm to safe value */
1360		data->pwm1.pwm = 255;
1361		adm1026_write_value(client, ADM1026_REG_PWM, data->pwm1.pwm);
1362	}
1363	mutex_unlock(&data->update_lock);
1364
1365	return count;
1366}
1367
1368/* enable PWM fan control */
1369static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm_reg, set_pwm_reg);
1370static DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm_reg, set_pwm_reg);
1371static DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm_reg, set_pwm_reg);
1372static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
1373	set_pwm_enable);
1374static DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
1375	set_pwm_enable);
1376static DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
1377	set_pwm_enable);
1378static DEVICE_ATTR(temp1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1379	show_auto_pwm_min, set_auto_pwm_min);
1380static DEVICE_ATTR(temp2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1381	show_auto_pwm_min, set_auto_pwm_min);
1382static DEVICE_ATTR(temp3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1383	show_auto_pwm_min, set_auto_pwm_min);
1384
1385static DEVICE_ATTR(temp1_auto_point2_pwm, S_IRUGO, show_auto_pwm_max, NULL);
1386static DEVICE_ATTR(temp2_auto_point2_pwm, S_IRUGO, show_auto_pwm_max, NULL);
1387static DEVICE_ATTR(temp3_auto_point2_pwm, S_IRUGO, show_auto_pwm_max, NULL);
1388
1389static struct attribute *adm1026_attributes[] = {
1390	&sensor_dev_attr_in0_input.dev_attr.attr,
1391	&sensor_dev_attr_in0_max.dev_attr.attr,
1392	&sensor_dev_attr_in0_min.dev_attr.attr,
1393	&sensor_dev_attr_in0_alarm.dev_attr.attr,
1394	&sensor_dev_attr_in1_input.dev_attr.attr,
1395	&sensor_dev_attr_in1_max.dev_attr.attr,
1396	&sensor_dev_attr_in1_min.dev_attr.attr,
1397	&sensor_dev_attr_in1_alarm.dev_attr.attr,
1398	&sensor_dev_attr_in2_input.dev_attr.attr,
1399	&sensor_dev_attr_in2_max.dev_attr.attr,
1400	&sensor_dev_attr_in2_min.dev_attr.attr,
1401	&sensor_dev_attr_in2_alarm.dev_attr.attr,
1402	&sensor_dev_attr_in3_input.dev_attr.attr,
1403	&sensor_dev_attr_in3_max.dev_attr.attr,
1404	&sensor_dev_attr_in3_min.dev_attr.attr,
1405	&sensor_dev_attr_in3_alarm.dev_attr.attr,
1406	&sensor_dev_attr_in4_input.dev_attr.attr,
1407	&sensor_dev_attr_in4_max.dev_attr.attr,
1408	&sensor_dev_attr_in4_min.dev_attr.attr,
1409	&sensor_dev_attr_in4_alarm.dev_attr.attr,
1410	&sensor_dev_attr_in5_input.dev_attr.attr,
1411	&sensor_dev_attr_in5_max.dev_attr.attr,
1412	&sensor_dev_attr_in5_min.dev_attr.attr,
1413	&sensor_dev_attr_in5_alarm.dev_attr.attr,
1414	&sensor_dev_attr_in6_input.dev_attr.attr,
1415	&sensor_dev_attr_in6_max.dev_attr.attr,
1416	&sensor_dev_attr_in6_min.dev_attr.attr,
1417	&sensor_dev_attr_in6_alarm.dev_attr.attr,
1418	&sensor_dev_attr_in7_input.dev_attr.attr,
1419	&sensor_dev_attr_in7_max.dev_attr.attr,
1420	&sensor_dev_attr_in7_min.dev_attr.attr,
1421	&sensor_dev_attr_in7_alarm.dev_attr.attr,
1422	&sensor_dev_attr_in10_input.dev_attr.attr,
1423	&sensor_dev_attr_in10_max.dev_attr.attr,
1424	&sensor_dev_attr_in10_min.dev_attr.attr,
1425	&sensor_dev_attr_in10_alarm.dev_attr.attr,
1426	&sensor_dev_attr_in11_input.dev_attr.attr,
1427	&sensor_dev_attr_in11_max.dev_attr.attr,
1428	&sensor_dev_attr_in11_min.dev_attr.attr,
1429	&sensor_dev_attr_in11_alarm.dev_attr.attr,
1430	&sensor_dev_attr_in12_input.dev_attr.attr,
1431	&sensor_dev_attr_in12_max.dev_attr.attr,
1432	&sensor_dev_attr_in12_min.dev_attr.attr,
1433	&sensor_dev_attr_in12_alarm.dev_attr.attr,
1434	&sensor_dev_attr_in13_input.dev_attr.attr,
1435	&sensor_dev_attr_in13_max.dev_attr.attr,
1436	&sensor_dev_attr_in13_min.dev_attr.attr,
1437	&sensor_dev_attr_in13_alarm.dev_attr.attr,
1438	&sensor_dev_attr_in14_input.dev_attr.attr,
1439	&sensor_dev_attr_in14_max.dev_attr.attr,
1440	&sensor_dev_attr_in14_min.dev_attr.attr,
1441	&sensor_dev_attr_in14_alarm.dev_attr.attr,
1442	&sensor_dev_attr_in15_input.dev_attr.attr,
1443	&sensor_dev_attr_in15_max.dev_attr.attr,
1444	&sensor_dev_attr_in15_min.dev_attr.attr,
1445	&sensor_dev_attr_in15_alarm.dev_attr.attr,
1446	&sensor_dev_attr_in16_input.dev_attr.attr,
1447	&sensor_dev_attr_in16_max.dev_attr.attr,
1448	&sensor_dev_attr_in16_min.dev_attr.attr,
1449	&sensor_dev_attr_in16_alarm.dev_attr.attr,
1450	&sensor_dev_attr_fan1_input.dev_attr.attr,
1451	&sensor_dev_attr_fan1_div.dev_attr.attr,
1452	&sensor_dev_attr_fan1_min.dev_attr.attr,
1453	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
1454	&sensor_dev_attr_fan2_input.dev_attr.attr,
1455	&sensor_dev_attr_fan2_div.dev_attr.attr,
1456	&sensor_dev_attr_fan2_min.dev_attr.attr,
1457	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
1458	&sensor_dev_attr_fan3_input.dev_attr.attr,
1459	&sensor_dev_attr_fan3_div.dev_attr.attr,
1460	&sensor_dev_attr_fan3_min.dev_attr.attr,
1461	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
1462	&sensor_dev_attr_fan4_input.dev_attr.attr,
1463	&sensor_dev_attr_fan4_div.dev_attr.attr,
1464	&sensor_dev_attr_fan4_min.dev_attr.attr,
1465	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
1466	&sensor_dev_attr_fan5_input.dev_attr.attr,
1467	&sensor_dev_attr_fan5_div.dev_attr.attr,
1468	&sensor_dev_attr_fan5_min.dev_attr.attr,
1469	&sensor_dev_attr_fan5_alarm.dev_attr.attr,
1470	&sensor_dev_attr_fan6_input.dev_attr.attr,
1471	&sensor_dev_attr_fan6_div.dev_attr.attr,
1472	&sensor_dev_attr_fan6_min.dev_attr.attr,
1473	&sensor_dev_attr_fan6_alarm.dev_attr.attr,
1474	&sensor_dev_attr_fan7_input.dev_attr.attr,
1475	&sensor_dev_attr_fan7_div.dev_attr.attr,
1476	&sensor_dev_attr_fan7_min.dev_attr.attr,
1477	&sensor_dev_attr_fan7_alarm.dev_attr.attr,
1478	&sensor_dev_attr_fan8_input.dev_attr.attr,
1479	&sensor_dev_attr_fan8_div.dev_attr.attr,
1480	&sensor_dev_attr_fan8_min.dev_attr.attr,
1481	&sensor_dev_attr_fan8_alarm.dev_attr.attr,
1482	&sensor_dev_attr_temp1_input.dev_attr.attr,
1483	&sensor_dev_attr_temp1_max.dev_attr.attr,
1484	&sensor_dev_attr_temp1_min.dev_attr.attr,
1485	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
1486	&sensor_dev_attr_temp2_input.dev_attr.attr,
1487	&sensor_dev_attr_temp2_max.dev_attr.attr,
1488	&sensor_dev_attr_temp2_min.dev_attr.attr,
1489	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
1490	&sensor_dev_attr_temp1_offset.dev_attr.attr,
1491	&sensor_dev_attr_temp2_offset.dev_attr.attr,
1492	&sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1493	&sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1494	&sensor_dev_attr_temp1_auto_point1_temp_hyst.dev_attr.attr,
1495	&sensor_dev_attr_temp2_auto_point1_temp_hyst.dev_attr.attr,
1496	&sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1497	&sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1498	&sensor_dev_attr_temp1_crit.dev_attr.attr,
1499	&sensor_dev_attr_temp2_crit.dev_attr.attr,
1500	&dev_attr_temp1_crit_enable.attr,
1501	&dev_attr_temp2_crit_enable.attr,
1502	&dev_attr_cpu0_vid.attr,
1503	&dev_attr_vrm.attr,
1504	&dev_attr_alarms.attr,
1505	&dev_attr_alarm_mask.attr,
1506	&dev_attr_gpio.attr,
1507	&dev_attr_gpio_mask.attr,
1508	&dev_attr_pwm1.attr,
1509	&dev_attr_pwm2.attr,
1510	&dev_attr_pwm3.attr,
1511	&dev_attr_pwm1_enable.attr,
1512	&dev_attr_pwm2_enable.attr,
1513	&dev_attr_pwm3_enable.attr,
1514	&dev_attr_temp1_auto_point1_pwm.attr,
1515	&dev_attr_temp2_auto_point1_pwm.attr,
1516	&dev_attr_temp1_auto_point2_pwm.attr,
1517	&dev_attr_temp2_auto_point2_pwm.attr,
1518	&dev_attr_analog_out.attr,
1519	NULL
1520};
1521
1522static const struct attribute_group adm1026_group = {
1523	.attrs = adm1026_attributes,
1524};
1525
1526static struct attribute *adm1026_attributes_temp3[] = {
1527	&sensor_dev_attr_temp3_input.dev_attr.attr,
1528	&sensor_dev_attr_temp3_max.dev_attr.attr,
1529	&sensor_dev_attr_temp3_min.dev_attr.attr,
1530	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
1531	&sensor_dev_attr_temp3_offset.dev_attr.attr,
1532	&sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1533	&sensor_dev_attr_temp3_auto_point1_temp_hyst.dev_attr.attr,
1534	&sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1535	&sensor_dev_attr_temp3_crit.dev_attr.attr,
1536	&dev_attr_temp3_crit_enable.attr,
1537	&dev_attr_temp3_auto_point1_pwm.attr,
1538	&dev_attr_temp3_auto_point2_pwm.attr,
1539	NULL
1540};
1541
1542static const struct attribute_group adm1026_group_temp3 = {
1543	.attrs = adm1026_attributes_temp3,
1544};
1545
1546static struct attribute *adm1026_attributes_in8_9[] = {
1547	&sensor_dev_attr_in8_input.dev_attr.attr,
1548	&sensor_dev_attr_in8_max.dev_attr.attr,
1549	&sensor_dev_attr_in8_min.dev_attr.attr,
1550	&sensor_dev_attr_in8_alarm.dev_attr.attr,
1551	&sensor_dev_attr_in9_input.dev_attr.attr,
1552	&sensor_dev_attr_in9_max.dev_attr.attr,
1553	&sensor_dev_attr_in9_min.dev_attr.attr,
1554	&sensor_dev_attr_in9_alarm.dev_attr.attr,
1555	NULL
1556};
1557
1558static const struct attribute_group adm1026_group_in8_9 = {
1559	.attrs = adm1026_attributes_in8_9,
1560};
1561
1562/* Return 0 if detection is successful, -ENODEV otherwise */
1563static int adm1026_detect(struct i2c_client *client,
1564			  struct i2c_board_info *info)
1565{
1566	struct i2c_adapter *adapter = client->adapter;
1567	int address = client->addr;
1568	int company, verstep;
1569
1570	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1571		/* We need to be able to do byte I/O */
1572		return -ENODEV;
1573	}
1574
1575	/* Now, we do the remaining detection. */
1576
1577	company = adm1026_read_value(client, ADM1026_REG_COMPANY);
1578	verstep = adm1026_read_value(client, ADM1026_REG_VERSTEP);
1579
1580	dev_dbg(&adapter->dev,
1581		"Detecting device at %d,0x%02x with COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
1582		i2c_adapter_id(client->adapter), client->addr,
1583		company, verstep);
1584
1585	/* Determine the chip type. */
1586	dev_dbg(&adapter->dev, "Autodetecting device at %d,0x%02x...\n",
1587		i2c_adapter_id(adapter), address);
1588	if (company == ADM1026_COMPANY_ANALOG_DEV
1589	    && verstep == ADM1026_VERSTEP_ADM1026) {
1590		/* Analog Devices ADM1026 */
1591	} else if (company == ADM1026_COMPANY_ANALOG_DEV
1592		&& (verstep & 0xf0) == ADM1026_VERSTEP_GENERIC) {
1593		dev_err(&adapter->dev,
1594			"Unrecognized stepping 0x%02x. Defaulting to ADM1026.\n",
1595			verstep);
1596	} else if ((verstep & 0xf0) == ADM1026_VERSTEP_GENERIC) {
1597		dev_err(&adapter->dev,
1598			"Found version/stepping 0x%02x. Assuming generic ADM1026.\n",
1599			verstep);
1600	} else {
1601		dev_dbg(&adapter->dev, "Autodetection failed\n");
1602		/* Not an ADM1026... */
1603		return -ENODEV;
1604	}
1605
1606	strlcpy(info->type, "adm1026", I2C_NAME_SIZE);
1607
1608	return 0;
1609}
1610
1611static void adm1026_print_gpio(struct i2c_client *client)
1612{
1613	struct adm1026_data *data = i2c_get_clientdata(client);
1614	int i;
1615
1616	dev_dbg(&client->dev, "GPIO config is:\n");
1617	for (i = 0; i <= 7; ++i) {
1618		if (data->config2 & (1 << i)) {
1619			dev_dbg(&client->dev, "\t%sGP%s%d\n",
1620				data->gpio_config[i] & 0x02 ? "" : "!",
1621				data->gpio_config[i] & 0x01 ? "OUT" : "IN",
1622				i);
1623		} else {
1624			dev_dbg(&client->dev, "\tFAN%d\n", i);
1625		}
1626	}
1627	for (i = 8; i <= 15; ++i) {
1628		dev_dbg(&client->dev, "\t%sGP%s%d\n",
1629			data->gpio_config[i] & 0x02 ? "" : "!",
1630			data->gpio_config[i] & 0x01 ? "OUT" : "IN",
1631			i);
1632	}
1633	if (data->config3 & CFG3_GPIO16_ENABLE) {
1634		dev_dbg(&client->dev, "\t%sGP%s16\n",
1635			data->gpio_config[16] & 0x02 ? "" : "!",
1636			data->gpio_config[16] & 0x01 ? "OUT" : "IN");
1637	} else {
1638		/* GPIO16 is THERM */
1639		dev_dbg(&client->dev, "\tTHERM\n");
1640	}
1641}
1642
1643static void adm1026_fixup_gpio(struct i2c_client *client)
1644{
1645	struct adm1026_data *data = i2c_get_clientdata(client);
1646	int i;
1647	int value;
1648
1649	/* Make the changes requested. */
1650	/*
1651	 * We may need to unlock/stop monitoring or soft-reset the
1652	 *    chip before we can make changes.  This hasn't been
1653	 *    tested much.  FIXME
1654	 */
1655
1656	/* Make outputs */
1657	for (i = 0; i <= 16; ++i) {
1658		if (gpio_output[i] >= 0 && gpio_output[i] <= 16)
1659			data->gpio_config[gpio_output[i]] |= 0x01;
1660		/* if GPIO0-7 is output, it isn't a FAN tach */
1661		if (gpio_output[i] >= 0 && gpio_output[i] <= 7)
1662			data->config2 |= 1 << gpio_output[i];
1663	}
1664
1665	/* Input overrides output */
1666	for (i = 0; i <= 16; ++i) {
1667		if (gpio_input[i] >= 0 && gpio_input[i] <= 16)
1668			data->gpio_config[gpio_input[i]] &= ~0x01;
1669		/* if GPIO0-7 is input, it isn't a FAN tach */
1670		if (gpio_input[i] >= 0 && gpio_input[i] <= 7)
1671			data->config2 |= 1 << gpio_input[i];
1672	}
1673
1674	/* Inverted */
1675	for (i = 0; i <= 16; ++i) {
1676		if (gpio_inverted[i] >= 0 && gpio_inverted[i] <= 16)
1677			data->gpio_config[gpio_inverted[i]] &= ~0x02;
1678	}
1679
1680	/* Normal overrides inverted */
1681	for (i = 0; i <= 16; ++i) {
1682		if (gpio_normal[i] >= 0 && gpio_normal[i] <= 16)
1683			data->gpio_config[gpio_normal[i]] |= 0x02;
1684	}
1685
1686	/* Fan overrides input and output */
1687	for (i = 0; i <= 7; ++i) {
1688		if (gpio_fan[i] >= 0 && gpio_fan[i] <= 7)
1689			data->config2 &= ~(1 << gpio_fan[i]);
1690	}
1691
1692	/* Write new configs to registers */
1693	adm1026_write_value(client, ADM1026_REG_CONFIG2, data->config2);
1694	data->config3 = (data->config3 & 0x3f)
1695			| ((data->gpio_config[16] & 0x03) << 6);
1696	adm1026_write_value(client, ADM1026_REG_CONFIG3, data->config3);
1697	for (i = 15, value = 0; i >= 0; --i) {
1698		value <<= 2;
1699		value |= data->gpio_config[i] & 0x03;
1700		if ((i & 0x03) == 0) {
1701			adm1026_write_value(client,
1702					ADM1026_REG_GPIO_CFG_0_3 + i/4,
1703					value);
1704			value = 0;
1705		}
1706	}
1707
1708	/* Print the new config */
1709	adm1026_print_gpio(client);
1710}
1711
1712static void adm1026_init_client(struct i2c_client *client)
1713{
1714	int value, i;
1715	struct adm1026_data *data = i2c_get_clientdata(client);
1716
1717	dev_dbg(&client->dev, "Initializing device\n");
1718	/* Read chip config */
1719	data->config1 = adm1026_read_value(client, ADM1026_REG_CONFIG1);
1720	data->config2 = adm1026_read_value(client, ADM1026_REG_CONFIG2);
1721	data->config3 = adm1026_read_value(client, ADM1026_REG_CONFIG3);
1722
1723	/* Inform user of chip config */
1724	dev_dbg(&client->dev, "ADM1026_REG_CONFIG1 is: 0x%02x\n",
1725		data->config1);
1726	if ((data->config1 & CFG1_MONITOR) == 0) {
1727		dev_dbg(&client->dev,
1728			"Monitoring not currently enabled.\n");
1729	}
1730	if (data->config1 & CFG1_INT_ENABLE) {
1731		dev_dbg(&client->dev,
1732			"SMBALERT interrupts are enabled.\n");
1733	}
1734	if (data->config1 & CFG1_AIN8_9) {
1735		dev_dbg(&client->dev,
1736			"in8 and in9 enabled. temp3 disabled.\n");
1737	} else {
1738		dev_dbg(&client->dev,
1739			"temp3 enabled.  in8 and in9 disabled.\n");
1740	}
1741	if (data->config1 & CFG1_THERM_HOT) {
1742		dev_dbg(&client->dev,
1743			"Automatic THERM, PWM, and temp limits enabled.\n");
1744	}
1745
1746	if (data->config3 & CFG3_GPIO16_ENABLE) {
1747		dev_dbg(&client->dev,
1748			"GPIO16 enabled.  THERM pin disabled.\n");
1749	} else {
1750		dev_dbg(&client->dev,
1751			"THERM pin enabled.  GPIO16 disabled.\n");
1752	}
1753	if (data->config3 & CFG3_VREF_250)
1754		dev_dbg(&client->dev, "Vref is 2.50 Volts.\n");
1755	else
1756		dev_dbg(&client->dev, "Vref is 1.82 Volts.\n");
1757	/* Read and pick apart the existing GPIO configuration */
1758	value = 0;
1759	for (i = 0; i <= 15; ++i) {
1760		if ((i & 0x03) == 0) {
1761			value = adm1026_read_value(client,
1762					ADM1026_REG_GPIO_CFG_0_3 + i / 4);
1763		}
1764		data->gpio_config[i] = value & 0x03;
1765		value >>= 2;
1766	}
1767	data->gpio_config[16] = (data->config3 >> 6) & 0x03;
1768
1769	/* ... and then print it */
1770	adm1026_print_gpio(client);
1771
1772	/*
1773	 * If the user asks us to reprogram the GPIO config, then
1774	 * do it now.
1775	 */
1776	if (gpio_input[0] != -1 || gpio_output[0] != -1
1777		|| gpio_inverted[0] != -1 || gpio_normal[0] != -1
1778		|| gpio_fan[0] != -1) {
1779		adm1026_fixup_gpio(client);
1780	}
1781
1782	/*
1783	 * WE INTENTIONALLY make no changes to the limits,
1784	 *   offsets, pwms, fans and zones.  If they were
1785	 *   configured, we don't want to mess with them.
1786	 *   If they weren't, the default is 100% PWM, no
1787	 *   control and will suffice until 'sensors -s'
1788	 *   can be run by the user.  We DO set the default
1789	 *   value for pwm1.auto_pwm_min to its maximum
1790	 *   so that enabling automatic pwm fan control
1791	 *   without first setting a value for pwm1.auto_pwm_min
1792	 *   will not result in potentially dangerous fan speed decrease.
1793	 */
1794	data->pwm1.auto_pwm_min = 255;
1795	/* Start monitoring */
1796	value = adm1026_read_value(client, ADM1026_REG_CONFIG1);
1797	/* Set MONITOR, clear interrupt acknowledge and s/w reset */
1798	value = (value | CFG1_MONITOR) & (~CFG1_INT_CLEAR & ~CFG1_RESET);
1799	dev_dbg(&client->dev, "Setting CONFIG to: 0x%02x\n", value);
1800	data->config1 = value;
1801	adm1026_write_value(client, ADM1026_REG_CONFIG1, value);
1802
1803	/* initialize fan_div[] to hardware defaults */
1804	value = adm1026_read_value(client, ADM1026_REG_FAN_DIV_0_3) |
1805		(adm1026_read_value(client, ADM1026_REG_FAN_DIV_4_7) << 8);
1806	for (i = 0; i <= 7; ++i) {
1807		data->fan_div[i] = DIV_FROM_REG(value & 0x03);
1808		value >>= 2;
1809	}
1810}
1811
1812static int adm1026_probe(struct i2c_client *client,
1813			 const struct i2c_device_id *id)
1814{
1815	struct device *dev = &client->dev;
1816	struct device *hwmon_dev;
1817	struct adm1026_data *data;
1818
1819	data = devm_kzalloc(dev, sizeof(struct adm1026_data), GFP_KERNEL);
1820	if (!data)
1821		return -ENOMEM;
1822
1823	i2c_set_clientdata(client, data);
1824	data->client = client;
1825	mutex_init(&data->update_lock);
1826
1827	/* Set the VRM version */
1828	data->vrm = vid_which_vrm();
1829
1830	/* Initialize the ADM1026 chip */
1831	adm1026_init_client(client);
1832
1833	/* sysfs hooks */
1834	data->groups[0] = &adm1026_group;
1835	if (data->config1 & CFG1_AIN8_9)
1836		data->groups[1] = &adm1026_group_in8_9;
1837	else
1838		data->groups[1] = &adm1026_group_temp3;
1839
1840	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1841							   data, data->groups);
1842	return PTR_ERR_OR_ZERO(hwmon_dev);
1843}
1844
1845static const struct i2c_device_id adm1026_id[] = {
1846	{ "adm1026", 0 },
1847	{ }
1848};
1849MODULE_DEVICE_TABLE(i2c, adm1026_id);
1850
1851static struct i2c_driver adm1026_driver = {
1852	.class		= I2C_CLASS_HWMON,
1853	.driver = {
1854		.name	= "adm1026",
1855	},
1856	.probe		= adm1026_probe,
1857	.id_table	= adm1026_id,
1858	.detect		= adm1026_detect,
1859	.address_list	= normal_i2c,
1860};
1861
1862module_i2c_driver(adm1026_driver);
1863
1864MODULE_LICENSE("GPL");
1865MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
1866	      "Justin Thiessen <jthiessen@penguincomputing.com>");
1867MODULE_DESCRIPTION("ADM1026 driver");