Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 1 | /* Texas Instruments TMP102 SMBus temperature sensor driver |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 2 | * |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 3 | * Copyright (C) 2010 Steven King <sfking@fdwdc.com> |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 20 | #include <linux/module.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/i2c.h> |
| 24 | #include <linux/hwmon.h> |
| 25 | #include <linux/hwmon-sysfs.h> |
| 26 | #include <linux/err.h> |
| 27 | #include <linux/mutex.h> |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 28 | #include <linux/device.h> |
Jean Delvare | dcd8f39 | 2012-10-10 15:25:56 +0200 | [diff] [blame] | 29 | #include <linux/jiffies.h> |
Eduardo Valentin | 6a02752 | 2013-07-16 14:57:51 -0400 | [diff] [blame] | 30 | #include <linux/thermal.h> |
| 31 | #include <linux/of.h> |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 32 | |
| 33 | #define DRIVER_NAME "tmp102" |
| 34 | |
| 35 | #define TMP102_TEMP_REG 0x00 |
| 36 | #define TMP102_CONF_REG 0x01 |
| 37 | /* note: these bit definitions are byte swapped */ |
| 38 | #define TMP102_CONF_SD 0x0100 |
| 39 | #define TMP102_CONF_TM 0x0200 |
| 40 | #define TMP102_CONF_POL 0x0400 |
| 41 | #define TMP102_CONF_F0 0x0800 |
| 42 | #define TMP102_CONF_F1 0x1000 |
| 43 | #define TMP102_CONF_R0 0x2000 |
| 44 | #define TMP102_CONF_R1 0x4000 |
| 45 | #define TMP102_CONF_OS 0x8000 |
| 46 | #define TMP102_CONF_EM 0x0010 |
| 47 | #define TMP102_CONF_AL 0x0020 |
| 48 | #define TMP102_CONF_CR0 0x0040 |
| 49 | #define TMP102_CONF_CR1 0x0080 |
| 50 | #define TMP102_TLOW_REG 0x02 |
| 51 | #define TMP102_THIGH_REG 0x03 |
| 52 | |
| 53 | struct tmp102 { |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 54 | struct i2c_client *client; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 55 | struct device *hwmon_dev; |
Eduardo Valentin | 6a02752 | 2013-07-16 14:57:51 -0400 | [diff] [blame] | 56 | struct thermal_zone_device *tz; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 57 | struct mutex lock; |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 58 | u16 config_orig; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 59 | unsigned long last_update; |
| 60 | int temp[3]; |
| 61 | }; |
| 62 | |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 63 | /* convert left adjusted 13-bit TMP102 register value to milliCelsius */ |
| 64 | static inline int tmp102_reg_to_mC(s16 val) |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 65 | { |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 66 | return ((val & ~0x01) * 1000) / 128; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 67 | } |
| 68 | |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 69 | /* convert milliCelsius to left adjusted 13-bit TMP102 register value */ |
| 70 | static inline u16 tmp102_mC_to_reg(int val) |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 71 | { |
| 72 | return (val * 128) / 1000; |
| 73 | } |
| 74 | |
| 75 | static const u8 tmp102_reg[] = { |
| 76 | TMP102_TEMP_REG, |
| 77 | TMP102_TLOW_REG, |
| 78 | TMP102_THIGH_REG, |
| 79 | }; |
| 80 | |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 81 | static struct tmp102 *tmp102_update_device(struct device *dev) |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 82 | { |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 83 | struct tmp102 *tmp102 = dev_get_drvdata(dev); |
| 84 | struct i2c_client *client = tmp102->client; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 85 | |
| 86 | mutex_lock(&tmp102->lock); |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 87 | if (time_after(jiffies, tmp102->last_update + HZ / 3)) { |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 88 | int i; |
| 89 | for (i = 0; i < ARRAY_SIZE(tmp102->temp); ++i) { |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 90 | int status = i2c_smbus_read_word_swapped(client, |
| 91 | tmp102_reg[i]); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 92 | if (status > -1) |
| 93 | tmp102->temp[i] = tmp102_reg_to_mC(status); |
| 94 | } |
| 95 | tmp102->last_update = jiffies; |
| 96 | } |
| 97 | mutex_unlock(&tmp102->lock); |
| 98 | return tmp102; |
| 99 | } |
| 100 | |
Eduardo Valentin | 6a02752 | 2013-07-16 14:57:51 -0400 | [diff] [blame] | 101 | static int tmp102_read_temp(void *dev, long *temp) |
| 102 | { |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 103 | struct tmp102 *tmp102 = tmp102_update_device(dev); |
Eduardo Valentin | 6a02752 | 2013-07-16 14:57:51 -0400 | [diff] [blame] | 104 | |
| 105 | *temp = tmp102->temp[0]; |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 110 | static ssize_t tmp102_show_temp(struct device *dev, |
| 111 | struct device_attribute *attr, |
| 112 | char *buf) |
| 113 | { |
| 114 | struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 115 | struct tmp102 *tmp102 = tmp102_update_device(dev); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 116 | |
| 117 | return sprintf(buf, "%d\n", tmp102->temp[sda->index]); |
| 118 | } |
| 119 | |
| 120 | static ssize_t tmp102_set_temp(struct device *dev, |
| 121 | struct device_attribute *attr, |
| 122 | const char *buf, size_t count) |
| 123 | { |
| 124 | struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 125 | struct tmp102 *tmp102 = dev_get_drvdata(dev); |
| 126 | struct i2c_client *client = tmp102->client; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 127 | long val; |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 128 | int status; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 129 | |
Frans Meulenbroeks | 179c4fd | 2012-01-04 20:58:52 +0100 | [diff] [blame] | 130 | if (kstrtol(buf, 10, &val) < 0) |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 131 | return -EINVAL; |
Guenter Roeck | 2a844c1 | 2013-01-09 08:09:34 -0800 | [diff] [blame] | 132 | val = clamp_val(val, -256000, 255000); |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 133 | |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 134 | mutex_lock(&tmp102->lock); |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 135 | tmp102->temp[sda->index] = val; |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 136 | status = i2c_smbus_write_word_swapped(client, tmp102_reg[sda->index], |
| 137 | tmp102_mC_to_reg(val)); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 138 | mutex_unlock(&tmp102->lock); |
| 139 | return status ? : count; |
| 140 | } |
| 141 | |
| 142 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, tmp102_show_temp, NULL , 0); |
| 143 | |
| 144 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, tmp102_show_temp, |
| 145 | tmp102_set_temp, 1); |
| 146 | |
| 147 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, tmp102_show_temp, |
| 148 | tmp102_set_temp, 2); |
| 149 | |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 150 | static struct attribute *tmp102_attrs[] = { |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 151 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
| 152 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
| 153 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
| 154 | NULL |
| 155 | }; |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 156 | ATTRIBUTE_GROUPS(tmp102); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 157 | |
| 158 | #define TMP102_CONFIG (TMP102_CONF_TM | TMP102_CONF_EM | TMP102_CONF_CR1) |
| 159 | #define TMP102_CONFIG_RD_ONLY (TMP102_CONF_R0 | TMP102_CONF_R1 | TMP102_CONF_AL) |
| 160 | |
Eduardo Valentin | 2251aef | 2014-11-07 21:24:39 -0400 | [diff] [blame] | 161 | static const struct thermal_zone_of_device_ops tmp102_of_thermal_ops = { |
| 162 | .get_temp = tmp102_read_temp, |
| 163 | }; |
| 164 | |
Bill Pemberton | 6c931ae | 2012-11-19 13:22:35 -0500 | [diff] [blame] | 165 | static int tmp102_probe(struct i2c_client *client, |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 166 | const struct i2c_device_id *id) |
| 167 | { |
Guenter Roeck | fbd9af1 | 2014-02-02 14:22:30 -0800 | [diff] [blame] | 168 | struct device *dev = &client->dev; |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 169 | struct device *hwmon_dev; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 170 | struct tmp102 *tmp102; |
| 171 | int status; |
| 172 | |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 173 | if (!i2c_check_functionality(client->adapter, |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 174 | I2C_FUNC_SMBUS_WORD_DATA)) { |
Guenter Roeck | fbd9af1 | 2014-02-02 14:22:30 -0800 | [diff] [blame] | 175 | dev_err(dev, |
Guenter Roeck | b55f375 | 2013-01-10 10:01:24 -0800 | [diff] [blame] | 176 | "adapter doesn't support SMBus word transactions\n"); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 177 | return -ENODEV; |
| 178 | } |
| 179 | |
Guenter Roeck | fbd9af1 | 2014-02-02 14:22:30 -0800 | [diff] [blame] | 180 | tmp102 = devm_kzalloc(dev, sizeof(*tmp102), GFP_KERNEL); |
Guenter Roeck | f511a21 | 2012-06-02 11:35:52 -0700 | [diff] [blame] | 181 | if (!tmp102) |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 182 | return -ENOMEM; |
Guenter Roeck | f511a21 | 2012-06-02 11:35:52 -0700 | [diff] [blame] | 183 | |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 184 | i2c_set_clientdata(client, tmp102); |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 185 | tmp102->client = client; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 186 | |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 187 | status = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG); |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 188 | if (status < 0) { |
Guenter Roeck | fbd9af1 | 2014-02-02 14:22:30 -0800 | [diff] [blame] | 189 | dev_err(dev, "error reading config register\n"); |
Guenter Roeck | f511a21 | 2012-06-02 11:35:52 -0700 | [diff] [blame] | 190 | return status; |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 191 | } |
| 192 | tmp102->config_orig = status; |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 193 | status = i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, |
| 194 | TMP102_CONFIG); |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 195 | if (status < 0) { |
Guenter Roeck | fbd9af1 | 2014-02-02 14:22:30 -0800 | [diff] [blame] | 196 | dev_err(dev, "error writing config register\n"); |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 197 | goto fail_restore_config; |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 198 | } |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 199 | status = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 200 | if (status < 0) { |
Guenter Roeck | fbd9af1 | 2014-02-02 14:22:30 -0800 | [diff] [blame] | 201 | dev_err(dev, "error reading config register\n"); |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 202 | goto fail_restore_config; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 203 | } |
| 204 | status &= ~TMP102_CONFIG_RD_ONLY; |
| 205 | if (status != TMP102_CONFIG) { |
Guenter Roeck | fbd9af1 | 2014-02-02 14:22:30 -0800 | [diff] [blame] | 206 | dev_err(dev, "config settings did not stick\n"); |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 207 | status = -ENODEV; |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 208 | goto fail_restore_config; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 209 | } |
| 210 | tmp102->last_update = jiffies - HZ; |
| 211 | mutex_init(&tmp102->lock); |
| 212 | |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 213 | hwmon_dev = hwmon_device_register_with_groups(dev, client->name, |
| 214 | tmp102, tmp102_groups); |
| 215 | if (IS_ERR(hwmon_dev)) { |
| 216 | dev_dbg(dev, "unable to register hwmon device\n"); |
| 217 | status = PTR_ERR(hwmon_dev); |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 218 | goto fail_restore_config; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 219 | } |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 220 | tmp102->hwmon_dev = hwmon_dev; |
| 221 | tmp102->tz = thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev, |
Eduardo Valentin | 2251aef | 2014-11-07 21:24:39 -0400 | [diff] [blame] | 222 | &tmp102_of_thermal_ops); |
Eduardo Valentin | 6a02752 | 2013-07-16 14:57:51 -0400 | [diff] [blame] | 223 | if (IS_ERR(tmp102->tz)) |
| 224 | tmp102->tz = NULL; |
| 225 | |
Guenter Roeck | fbd9af1 | 2014-02-02 14:22:30 -0800 | [diff] [blame] | 226 | dev_info(dev, "initialized\n"); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 227 | |
| 228 | return 0; |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 229 | |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 230 | fail_restore_config: |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 231 | i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, |
| 232 | tmp102->config_orig); |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 233 | return status; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 234 | } |
| 235 | |
Bill Pemberton | 281dfd0 | 2012-11-19 13:25:51 -0500 | [diff] [blame] | 236 | static int tmp102_remove(struct i2c_client *client) |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 237 | { |
| 238 | struct tmp102 *tmp102 = i2c_get_clientdata(client); |
| 239 | |
Guenter Roeck | ad9beea | 2014-02-02 10:08:09 -0800 | [diff] [blame] | 240 | thermal_zone_of_sensor_unregister(tmp102->hwmon_dev, tmp102->tz); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 241 | hwmon_device_unregister(tmp102->hwmon_dev); |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 242 | |
| 243 | /* Stop monitoring if device was stopped originally */ |
| 244 | if (tmp102->config_orig & TMP102_CONF_SD) { |
| 245 | int config; |
| 246 | |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 247 | config = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG); |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 248 | if (config >= 0) |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 249 | i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, |
| 250 | config | TMP102_CONF_SD); |
Jean Delvare | 38806bd | 2010-05-27 19:58:59 +0200 | [diff] [blame] | 251 | } |
| 252 | |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | #ifdef CONFIG_PM |
| 257 | static int tmp102_suspend(struct device *dev) |
| 258 | { |
| 259 | struct i2c_client *client = to_i2c_client(dev); |
Jean Delvare | 8d4dee9 | 2010-05-27 19:58:58 +0200 | [diff] [blame] | 260 | int config; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 261 | |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 262 | config = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG); |
Jean Delvare | 8d4dee9 | 2010-05-27 19:58:58 +0200 | [diff] [blame] | 263 | if (config < 0) |
| 264 | return config; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 265 | |
Jean Delvare | 8d4dee9 | 2010-05-27 19:58:58 +0200 | [diff] [blame] | 266 | config |= TMP102_CONF_SD; |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 267 | return i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, config); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | static int tmp102_resume(struct device *dev) |
| 271 | { |
| 272 | struct i2c_client *client = to_i2c_client(dev); |
Jean Delvare | 8d4dee9 | 2010-05-27 19:58:58 +0200 | [diff] [blame] | 273 | int config; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 274 | |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 275 | config = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG); |
Jean Delvare | 8d4dee9 | 2010-05-27 19:58:58 +0200 | [diff] [blame] | 276 | if (config < 0) |
| 277 | return config; |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 278 | |
Jean Delvare | 8d4dee9 | 2010-05-27 19:58:58 +0200 | [diff] [blame] | 279 | config &= ~TMP102_CONF_SD; |
Jean Delvare | 90f4102 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 280 | return i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, config); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | static const struct dev_pm_ops tmp102_dev_pm_ops = { |
| 284 | .suspend = tmp102_suspend, |
| 285 | .resume = tmp102_resume, |
| 286 | }; |
| 287 | |
| 288 | #define TMP102_DEV_PM_OPS (&tmp102_dev_pm_ops) |
| 289 | #else |
| 290 | #define TMP102_DEV_PM_OPS NULL |
| 291 | #endif /* CONFIG_PM */ |
| 292 | |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 293 | static const struct i2c_device_id tmp102_id[] = { |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 294 | { "tmp102", 0 }, |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 295 | { } |
| 296 | }; |
Jean Delvare | cff37c9 | 2010-05-27 19:58:57 +0200 | [diff] [blame] | 297 | MODULE_DEVICE_TABLE(i2c, tmp102_id); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 298 | |
| 299 | static struct i2c_driver tmp102_driver = { |
| 300 | .driver.name = DRIVER_NAME, |
| 301 | .driver.pm = TMP102_DEV_PM_OPS, |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 302 | .probe = tmp102_probe, |
Bill Pemberton | 9e5e9b7 | 2012-11-19 13:21:20 -0500 | [diff] [blame] | 303 | .remove = tmp102_remove, |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 304 | .id_table = tmp102_id, |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 305 | }; |
| 306 | |
Axel Lin | f0967ee | 2012-01-20 15:38:18 +0800 | [diff] [blame] | 307 | module_i2c_driver(tmp102_driver); |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 308 | |
Steven King | beb1b6b | 2010-05-27 19:58:56 +0200 | [diff] [blame] | 309 | MODULE_AUTHOR("Steven King <sfking@fdwdc.com>"); |
| 310 | MODULE_DESCRIPTION("Texas Instruments TMP102 temperature sensor driver"); |
| 311 | MODULE_LICENSE("GPL"); |