Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 1 | /* |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 2 | * Copyright (C) 2008, 2010 Davide Rizzo <elpa.rizzo@gmail.com> |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 3 | * |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 4 | * The LM95241 is a sensor chip made by National Semiconductors. |
| 5 | * It reports up to three temperatures (its own plus up to two external ones). |
| 6 | * Complete datasheet can be obtained from National's website at: |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 7 | * http://www.national.com/ds.cgi/LM/LM95241.pdf |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 | */ |
| 23 | |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/jiffies.h> |
| 28 | #include <linux/i2c.h> |
| 29 | #include <linux/hwmon.h> |
| 30 | #include <linux/hwmon-sysfs.h> |
| 31 | #include <linux/err.h> |
| 32 | #include <linux/mutex.h> |
| 33 | #include <linux/sysfs.h> |
| 34 | |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 35 | #define DEVNAME "lm95241" |
| 36 | |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 37 | static const unsigned short normal_i2c[] = { |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 38 | 0x19, 0x2a, 0x2b, I2C_CLIENT_END }; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 39 | |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 40 | /* LM95241 registers */ |
| 41 | #define LM95241_REG_R_MAN_ID 0xFE |
| 42 | #define LM95241_REG_R_CHIP_ID 0xFF |
| 43 | #define LM95241_REG_R_STATUS 0x02 |
| 44 | #define LM95241_REG_RW_CONFIG 0x03 |
| 45 | #define LM95241_REG_RW_REM_FILTER 0x06 |
| 46 | #define LM95241_REG_RW_TRUTHERM 0x07 |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 47 | #define LM95241_REG_W_ONE_SHOT 0x0F |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 48 | #define LM95241_REG_R_LOCAL_TEMPH 0x10 |
| 49 | #define LM95241_REG_R_REMOTE1_TEMPH 0x11 |
| 50 | #define LM95241_REG_R_REMOTE2_TEMPH 0x12 |
| 51 | #define LM95241_REG_R_LOCAL_TEMPL 0x20 |
| 52 | #define LM95241_REG_R_REMOTE1_TEMPL 0x21 |
| 53 | #define LM95241_REG_R_REMOTE2_TEMPL 0x22 |
| 54 | #define LM95241_REG_RW_REMOTE_MODEL 0x30 |
| 55 | |
| 56 | /* LM95241 specific bitfields */ |
| 57 | #define CFG_STOP 0x40 |
| 58 | #define CFG_CR0076 0x00 |
| 59 | #define CFG_CR0182 0x10 |
| 60 | #define CFG_CR1000 0x20 |
| 61 | #define CFG_CR2700 0x30 |
Guenter Roeck | f48ccb2 | 2016-07-03 21:46:05 -0700 | [diff] [blame^] | 62 | #define CFG_CRMASK 0x30 |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 63 | #define R1MS_SHIFT 0 |
| 64 | #define R2MS_SHIFT 2 |
| 65 | #define R1MS_MASK (0x01 << (R1MS_SHIFT)) |
| 66 | #define R2MS_MASK (0x01 << (R2MS_SHIFT)) |
| 67 | #define R1DF_SHIFT 1 |
| 68 | #define R2DF_SHIFT 2 |
| 69 | #define R1DF_MASK (0x01 << (R1DF_SHIFT)) |
| 70 | #define R2DF_MASK (0x01 << (R2DF_SHIFT)) |
| 71 | #define R1FE_MASK 0x01 |
| 72 | #define R2FE_MASK 0x05 |
| 73 | #define TT1_SHIFT 0 |
| 74 | #define TT2_SHIFT 4 |
| 75 | #define TT_OFF 0 |
| 76 | #define TT_ON 1 |
| 77 | #define TT_MASK 7 |
Guenter Roeck | 8c1d041 | 2011-07-05 13:31:48 -0700 | [diff] [blame] | 78 | #define NATSEMI_MAN_ID 0x01 |
| 79 | #define LM95231_CHIP_ID 0xA1 |
| 80 | #define LM95241_CHIP_ID 0xA4 |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 81 | |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 82 | static const u8 lm95241_reg_address[] = { |
| 83 | LM95241_REG_R_LOCAL_TEMPH, |
| 84 | LM95241_REG_R_LOCAL_TEMPL, |
| 85 | LM95241_REG_R_REMOTE1_TEMPH, |
| 86 | LM95241_REG_R_REMOTE1_TEMPL, |
| 87 | LM95241_REG_R_REMOTE2_TEMPH, |
| 88 | LM95241_REG_R_REMOTE2_TEMPL |
| 89 | }; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 90 | |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 91 | /* Client data (each client gets its own) */ |
| 92 | struct lm95241_data { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 93 | struct i2c_client *client; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 94 | struct mutex update_lock; |
Guenter Roeck | f48ccb2 | 2016-07-03 21:46:05 -0700 | [diff] [blame^] | 95 | unsigned long last_updated; /* in jiffies */ |
| 96 | unsigned long interval; /* in milli-seconds */ |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 97 | char valid; /* zero until following fields are valid */ |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 98 | /* registers values */ |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 99 | u8 temp[ARRAY_SIZE(lm95241_reg_address)]; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 100 | u8 config, model, trutherm; |
| 101 | }; |
| 102 | |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 103 | /* Conversions */ |
Guenter Roeck | 0c2a40e | 2011-06-30 02:09:37 -0700 | [diff] [blame] | 104 | static int temp_from_reg_signed(u8 val_h, u8 val_l) |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 105 | { |
Guenter Roeck | 0c2a40e | 2011-06-30 02:09:37 -0700 | [diff] [blame] | 106 | s16 val_hl = (val_h << 8) | val_l; |
| 107 | return val_hl * 1000 / 256; |
| 108 | } |
| 109 | |
| 110 | static int temp_from_reg_unsigned(u8 val_h, u8 val_l) |
| 111 | { |
| 112 | u16 val_hl = (val_h << 8) | val_l; |
| 113 | return val_hl * 1000 / 256; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 114 | } |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 115 | |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 116 | static struct lm95241_data *lm95241_update_device(struct device *dev) |
| 117 | { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 118 | struct lm95241_data *data = dev_get_drvdata(dev); |
| 119 | struct i2c_client *client = data->client; |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 120 | |
| 121 | mutex_lock(&data->update_lock); |
| 122 | |
Guenter Roeck | f48ccb2 | 2016-07-03 21:46:05 -0700 | [diff] [blame^] | 123 | if (time_after(jiffies, data->last_updated |
| 124 | + msecs_to_jiffies(data->interval)) || |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 125 | !data->valid) { |
| 126 | int i; |
| 127 | |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 128 | dev_dbg(dev, "Updating lm95241 data.\n"); |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 129 | for (i = 0; i < ARRAY_SIZE(lm95241_reg_address); i++) |
| 130 | data->temp[i] |
| 131 | = i2c_smbus_read_byte_data(client, |
| 132 | lm95241_reg_address[i]); |
| 133 | data->last_updated = jiffies; |
| 134 | data->valid = 1; |
| 135 | } |
| 136 | |
| 137 | mutex_unlock(&data->update_lock); |
| 138 | |
| 139 | return data; |
| 140 | } |
| 141 | |
| 142 | /* Sysfs stuff */ |
| 143 | static ssize_t show_input(struct device *dev, struct device_attribute *attr, |
| 144 | char *buf) |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 145 | { |
| 146 | struct lm95241_data *data = lm95241_update_device(dev); |
Guenter Roeck | 0c2a40e | 2011-06-30 02:09:37 -0700 | [diff] [blame] | 147 | int index = to_sensor_dev_attr(attr)->index; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 148 | |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 149 | return snprintf(buf, PAGE_SIZE - 1, "%d\n", |
Guenter Roeck | 0c2a40e | 2011-06-30 02:09:37 -0700 | [diff] [blame] | 150 | index == 0 || (data->config & (1 << (index / 2))) ? |
| 151 | temp_from_reg_signed(data->temp[index], data->temp[index + 1]) : |
| 152 | temp_from_reg_unsigned(data->temp[index], |
| 153 | data->temp[index + 1])); |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | static ssize_t show_type(struct device *dev, struct device_attribute *attr, |
| 157 | char *buf) |
| 158 | { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 159 | struct lm95241_data *data = dev_get_drvdata(dev); |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 160 | |
| 161 | return snprintf(buf, PAGE_SIZE - 1, |
| 162 | data->model & to_sensor_dev_attr(attr)->index ? "1\n" : "2\n"); |
| 163 | } |
| 164 | |
| 165 | static ssize_t set_type(struct device *dev, struct device_attribute *attr, |
| 166 | const char *buf, size_t count) |
| 167 | { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 168 | struct lm95241_data *data = dev_get_drvdata(dev); |
| 169 | struct i2c_client *client = data->client; |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 170 | unsigned long val; |
| 171 | int shift; |
| 172 | u8 mask = to_sensor_dev_attr(attr)->index; |
| 173 | |
Frans Meulenbroeks | 179c4fd | 2012-01-04 20:58:52 +0100 | [diff] [blame] | 174 | if (kstrtoul(buf, 10, &val) < 0) |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 175 | return -EINVAL; |
| 176 | if (val != 1 && val != 2) |
| 177 | return -EINVAL; |
| 178 | |
| 179 | shift = mask == R1MS_MASK ? TT1_SHIFT : TT2_SHIFT; |
| 180 | |
| 181 | mutex_lock(&data->update_lock); |
| 182 | |
| 183 | data->trutherm &= ~(TT_MASK << shift); |
| 184 | if (val == 1) { |
| 185 | data->model |= mask; |
| 186 | data->trutherm |= (TT_ON << shift); |
| 187 | } else { |
| 188 | data->model &= ~mask; |
| 189 | data->trutherm |= (TT_OFF << shift); |
| 190 | } |
| 191 | data->valid = 0; |
| 192 | |
| 193 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL, |
| 194 | data->model); |
| 195 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM, |
| 196 | data->trutherm); |
| 197 | |
| 198 | mutex_unlock(&data->update_lock); |
| 199 | |
| 200 | return count; |
| 201 | } |
| 202 | |
| 203 | static ssize_t show_min(struct device *dev, struct device_attribute *attr, |
| 204 | char *buf) |
| 205 | { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 206 | struct lm95241_data *data = dev_get_drvdata(dev); |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 207 | |
| 208 | return snprintf(buf, PAGE_SIZE - 1, |
| 209 | data->config & to_sensor_dev_attr(attr)->index ? |
| 210 | "-127000\n" : "0\n"); |
| 211 | } |
| 212 | |
| 213 | static ssize_t set_min(struct device *dev, struct device_attribute *attr, |
| 214 | const char *buf, size_t count) |
| 215 | { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 216 | struct lm95241_data *data = dev_get_drvdata(dev); |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 217 | long val; |
| 218 | |
Frans Meulenbroeks | 179c4fd | 2012-01-04 20:58:52 +0100 | [diff] [blame] | 219 | if (kstrtol(buf, 10, &val) < 0) |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 220 | return -EINVAL; |
| 221 | if (val < -128000) |
| 222 | return -EINVAL; |
| 223 | |
| 224 | mutex_lock(&data->update_lock); |
| 225 | |
| 226 | if (val < 0) |
| 227 | data->config |= to_sensor_dev_attr(attr)->index; |
| 228 | else |
| 229 | data->config &= ~to_sensor_dev_attr(attr)->index; |
| 230 | data->valid = 0; |
| 231 | |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 232 | i2c_smbus_write_byte_data(data->client, LM95241_REG_RW_CONFIG, |
| 233 | data->config); |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 234 | |
| 235 | mutex_unlock(&data->update_lock); |
| 236 | |
| 237 | return count; |
| 238 | } |
| 239 | |
| 240 | static ssize_t show_max(struct device *dev, struct device_attribute *attr, |
| 241 | char *buf) |
| 242 | { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 243 | struct lm95241_data *data = dev_get_drvdata(dev); |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 244 | |
| 245 | return snprintf(buf, PAGE_SIZE - 1, |
| 246 | data->config & to_sensor_dev_attr(attr)->index ? |
| 247 | "127000\n" : "255000\n"); |
| 248 | } |
| 249 | |
| 250 | static ssize_t set_max(struct device *dev, struct device_attribute *attr, |
| 251 | const char *buf, size_t count) |
| 252 | { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 253 | struct lm95241_data *data = dev_get_drvdata(dev); |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 254 | long val; |
| 255 | |
Frans Meulenbroeks | 179c4fd | 2012-01-04 20:58:52 +0100 | [diff] [blame] | 256 | if (kstrtol(buf, 10, &val) < 0) |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 257 | return -EINVAL; |
| 258 | if (val >= 256000) |
| 259 | return -EINVAL; |
| 260 | |
| 261 | mutex_lock(&data->update_lock); |
| 262 | |
| 263 | if (val <= 127000) |
| 264 | data->config |= to_sensor_dev_attr(attr)->index; |
| 265 | else |
| 266 | data->config &= ~to_sensor_dev_attr(attr)->index; |
| 267 | data->valid = 0; |
| 268 | |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 269 | i2c_smbus_write_byte_data(data->client, LM95241_REG_RW_CONFIG, |
| 270 | data->config); |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 271 | |
| 272 | mutex_unlock(&data->update_lock); |
| 273 | |
| 274 | return count; |
| 275 | } |
| 276 | |
| 277 | static ssize_t show_interval(struct device *dev, struct device_attribute *attr, |
| 278 | char *buf) |
| 279 | { |
| 280 | struct lm95241_data *data = lm95241_update_device(dev); |
| 281 | |
Guenter Roeck | f48ccb2 | 2016-07-03 21:46:05 -0700 | [diff] [blame^] | 282 | return snprintf(buf, PAGE_SIZE - 1, "%lu\n", data->interval); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 283 | } |
| 284 | |
Guenter Roeck | bc482bf | 2010-09-17 17:24:15 +0200 | [diff] [blame] | 285 | static ssize_t set_interval(struct device *dev, struct device_attribute *attr, |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 286 | const char *buf, size_t count) |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 287 | { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 288 | struct lm95241_data *data = dev_get_drvdata(dev); |
Jean Delvare | 61ec2da | 2010-11-15 21:38:56 +0100 | [diff] [blame] | 289 | unsigned long val; |
Guenter Roeck | f48ccb2 | 2016-07-03 21:46:05 -0700 | [diff] [blame^] | 290 | int convrate; |
| 291 | u8 config; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 292 | |
Frans Meulenbroeks | 179c4fd | 2012-01-04 20:58:52 +0100 | [diff] [blame] | 293 | if (kstrtoul(buf, 10, &val) < 0) |
Jean Delvare | 61ec2da | 2010-11-15 21:38:56 +0100 | [diff] [blame] | 294 | return -EINVAL; |
| 295 | |
Guenter Roeck | f48ccb2 | 2016-07-03 21:46:05 -0700 | [diff] [blame^] | 296 | mutex_lock(&data->update_lock); |
| 297 | |
| 298 | config = data->config & ~CFG_CRMASK; |
| 299 | |
| 300 | if (val < 130) { |
| 301 | convrate = 76; |
| 302 | config |= CFG_CR0076; |
| 303 | } else if (val < 590) { |
| 304 | convrate = 182; |
| 305 | config |= CFG_CR0182; |
| 306 | } else if (val < 1850) { |
| 307 | convrate = 1000; |
| 308 | config |= CFG_CR1000; |
| 309 | } else { |
| 310 | convrate = 2700; |
| 311 | config |= CFG_CR2700; |
| 312 | } |
| 313 | |
| 314 | data->interval = convrate; |
| 315 | data->config = config; |
| 316 | i2c_smbus_write_byte_data(data->client, LM95241_REG_RW_CONFIG, |
| 317 | config); |
| 318 | mutex_unlock(&data->update_lock); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 319 | |
| 320 | return count; |
| 321 | } |
| 322 | |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 323 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0); |
| 324 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2); |
| 325 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_input, NULL, 4); |
| 326 | static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type, |
| 327 | R1MS_MASK); |
| 328 | static SENSOR_DEVICE_ATTR(temp3_type, S_IWUSR | S_IRUGO, show_type, set_type, |
| 329 | R2MS_MASK); |
| 330 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_min, set_min, |
| 331 | R1DF_MASK); |
| 332 | static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_min, set_min, |
| 333 | R2DF_MASK); |
| 334 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max, set_max, |
| 335 | R1DF_MASK); |
| 336 | static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max, |
| 337 | R2DF_MASK); |
Guenter Roeck | bc482bf | 2010-09-17 17:24:15 +0200 | [diff] [blame] | 338 | static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval, |
| 339 | set_interval); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 340 | |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 341 | static struct attribute *lm95241_attrs[] = { |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 342 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
| 343 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
| 344 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
| 345 | &sensor_dev_attr_temp2_type.dev_attr.attr, |
| 346 | &sensor_dev_attr_temp3_type.dev_attr.attr, |
| 347 | &sensor_dev_attr_temp2_min.dev_attr.attr, |
| 348 | &sensor_dev_attr_temp3_min.dev_attr.attr, |
| 349 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
| 350 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
Guenter Roeck | bc482bf | 2010-09-17 17:24:15 +0200 | [diff] [blame] | 351 | &dev_attr_update_interval.attr, |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 352 | NULL |
| 353 | }; |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 354 | ATTRIBUTE_GROUPS(lm95241); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 355 | |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 356 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
Jean Delvare | 310ec79 | 2009-12-14 21:17:23 +0100 | [diff] [blame] | 357 | static int lm95241_detect(struct i2c_client *new_client, |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 358 | struct i2c_board_info *info) |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 359 | { |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 360 | struct i2c_adapter *adapter = new_client->adapter; |
Jean Delvare | 52df644 | 2009-12-09 20:35:57 +0100 | [diff] [blame] | 361 | const char *name; |
Guenter Roeck | 8c1d041 | 2011-07-05 13:31:48 -0700 | [diff] [blame] | 362 | int mfg_id, chip_id; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 363 | |
| 364 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 365 | return -ENODEV; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 366 | |
Guenter Roeck | 8c1d041 | 2011-07-05 13:31:48 -0700 | [diff] [blame] | 367 | mfg_id = i2c_smbus_read_byte_data(new_client, LM95241_REG_R_MAN_ID); |
| 368 | if (mfg_id != NATSEMI_MAN_ID) |
| 369 | return -ENODEV; |
| 370 | |
| 371 | chip_id = i2c_smbus_read_byte_data(new_client, LM95241_REG_R_CHIP_ID); |
| 372 | switch (chip_id) { |
| 373 | case LM95231_CHIP_ID: |
| 374 | name = "lm95231"; |
| 375 | break; |
| 376 | case LM95241_CHIP_ID: |
| 377 | name = "lm95241"; |
| 378 | break; |
| 379 | default: |
Jean Delvare | 52df644 | 2009-12-09 20:35:57 +0100 | [diff] [blame] | 380 | return -ENODEV; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 381 | } |
| 382 | |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 383 | /* Fill the i2c board info */ |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 384 | strlcpy(info->type, name, I2C_NAME_SIZE); |
| 385 | return 0; |
| 386 | } |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 387 | |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 388 | static void lm95241_init_client(struct i2c_client *client, |
| 389 | struct lm95241_data *data) |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 390 | { |
Guenter Roeck | f48ccb2 | 2016-07-03 21:46:05 -0700 | [diff] [blame^] | 391 | data->interval = 1000; |
| 392 | data->config = CFG_CR1000; |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 393 | data->trutherm = (TT_OFF << TT1_SHIFT) | (TT_OFF << TT2_SHIFT); |
| 394 | |
| 395 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config); |
| 396 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_REM_FILTER, |
| 397 | R1FE_MASK | R2FE_MASK); |
| 398 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM, |
| 399 | data->trutherm); |
| 400 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL, |
| 401 | data->model); |
| 402 | } |
| 403 | |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 404 | static int lm95241_probe(struct i2c_client *client, |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 405 | const struct i2c_device_id *id) |
| 406 | { |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 407 | struct device *dev = &client->dev; |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 408 | struct lm95241_data *data; |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 409 | struct device *hwmon_dev; |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 410 | |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 411 | data = devm_kzalloc(dev, sizeof(struct lm95241_data), GFP_KERNEL); |
Guenter Roeck | 1487bf7 | 2012-06-02 09:58:11 -0700 | [diff] [blame] | 412 | if (!data) |
| 413 | return -ENOMEM; |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 414 | |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 415 | data->client = client; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 416 | mutex_init(&data->update_lock); |
| 417 | |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 418 | /* Initialize the LM95241 chip */ |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 419 | lm95241_init_client(client, data); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 420 | |
Guenter Roeck | f809621 | 2014-01-20 09:25:50 -0800 | [diff] [blame] | 421 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
| 422 | data, |
| 423 | lm95241_groups); |
| 424 | return PTR_ERR_OR_ZERO(hwmon_dev); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 425 | } |
| 426 | |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 427 | /* Driver data (common to all clients) */ |
| 428 | static const struct i2c_device_id lm95241_id[] = { |
Guenter Roeck | 8c1d041 | 2011-07-05 13:31:48 -0700 | [diff] [blame] | 429 | { "lm95231", 0 }, |
| 430 | { "lm95241", 0 }, |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 431 | { } |
| 432 | }; |
| 433 | MODULE_DEVICE_TABLE(i2c, lm95241_id); |
| 434 | |
| 435 | static struct i2c_driver lm95241_driver = { |
| 436 | .class = I2C_CLASS_HWMON, |
| 437 | .driver = { |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 438 | .name = DEVNAME, |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 439 | }, |
| 440 | .probe = lm95241_probe, |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 441 | .id_table = lm95241_id, |
| 442 | .detect = lm95241_detect, |
Jean Delvare | c3813d6 | 2009-12-14 21:17:25 +0100 | [diff] [blame] | 443 | .address_list = normal_i2c, |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 444 | }; |
| 445 | |
Axel Lin | f0967ee | 2012-01-20 15:38:18 +0800 | [diff] [blame] | 446 | module_i2c_driver(lm95241_driver); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 447 | |
Davide Rizzo | 0f1deb4 | 2010-11-18 07:23:00 -0800 | [diff] [blame] | 448 | MODULE_AUTHOR("Davide Rizzo <elpa.rizzo@gmail.com>"); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 449 | MODULE_DESCRIPTION("LM95241 sensor driver"); |
| 450 | MODULE_LICENSE("GPL"); |