1d84ca5b3SWolfram Sang /* 2d84ca5b3SWolfram Sang * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor) 3d84ca5b3SWolfram Sang * 4d84ca5b3SWolfram Sang * Copyright (C) 2008, 2010 Pengutronix 5d84ca5b3SWolfram Sang * 6d84ca5b3SWolfram Sang * This program is free software; you can redistribute it and/or modify 7d84ca5b3SWolfram Sang * it under the terms of the GNU General Public License version 2 as 8d84ca5b3SWolfram Sang * published by the Free Software Foundation. 9d84ca5b3SWolfram Sang * 10a95da110SMichael Walle * TODO: SPI, use power-down mode for suspend?, interrupt handling? 11d84ca5b3SWolfram Sang */ 12d84ca5b3SWolfram Sang 13d84ca5b3SWolfram Sang #include <linux/kernel.h> 14d84ca5b3SWolfram Sang #include <linux/module.h> 15d84ca5b3SWolfram Sang #include <linux/init.h> 16d84ca5b3SWolfram Sang #include <linux/err.h> 17d84ca5b3SWolfram Sang #include <linux/mutex.h> 18d84ca5b3SWolfram Sang #include <linux/jiffies.h> 19d84ca5b3SWolfram Sang #include <linux/i2c.h> 20d84ca5b3SWolfram Sang #include <linux/hwmon.h> 21d84ca5b3SWolfram Sang #include <linux/hwmon-sysfs.h> 225a0e3ad6STejun Heo #include <linux/slab.h> 23d84ca5b3SWolfram Sang 24d84ca5b3SWolfram Sang #define ADT7411_REG_INT_TEMP_VDD_LSB 0x03 25d84ca5b3SWolfram Sang #define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04 26d84ca5b3SWolfram Sang #define ADT7411_REG_VDD_MSB 0x06 27d84ca5b3SWolfram Sang #define ADT7411_REG_INT_TEMP_MSB 0x07 28d84ca5b3SWolfram Sang #define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08 29d84ca5b3SWolfram Sang 30d84ca5b3SWolfram Sang #define ADT7411_REG_CFG1 0x18 31d84ca5b3SWolfram Sang #define ADT7411_CFG1_START_MONITOR (1 << 0) 32601807bbSMichael Walle #define ADT7411_CFG1_RESERVED_BIT1 (1 << 1) 33a95da110SMichael Walle #define ADT7411_CFG1_EXT_TDM (1 << 2) 34b53893aaSMichael Walle #define ADT7411_CFG1_RESERVED_BIT3 (1 << 3) 35d84ca5b3SWolfram Sang 36d84ca5b3SWolfram Sang #define ADT7411_REG_CFG2 0x19 37d84ca5b3SWolfram Sang #define ADT7411_CFG2_DISABLE_AVG (1 << 5) 38d84ca5b3SWolfram Sang 39d84ca5b3SWolfram Sang #define ADT7411_REG_CFG3 0x1a 40d84ca5b3SWolfram Sang #define ADT7411_CFG3_ADC_CLK_225 (1 << 0) 41601807bbSMichael Walle #define ADT7411_CFG3_RESERVED_BIT1 (1 << 1) 42601807bbSMichael Walle #define ADT7411_CFG3_RESERVED_BIT2 (1 << 2) 43601807bbSMichael Walle #define ADT7411_CFG3_RESERVED_BIT3 (1 << 3) 44d84ca5b3SWolfram Sang #define ADT7411_CFG3_REF_VDD (1 << 4) 45d84ca5b3SWolfram Sang 46d84ca5b3SWolfram Sang #define ADT7411_REG_DEVICE_ID 0x4d 47d84ca5b3SWolfram Sang #define ADT7411_REG_MANUFACTURER_ID 0x4e 48d84ca5b3SWolfram Sang 49d84ca5b3SWolfram Sang #define ADT7411_DEVICE_ID 0x2 50d84ca5b3SWolfram Sang #define ADT7411_MANUFACTURER_ID 0x41 51d84ca5b3SWolfram Sang 52d84ca5b3SWolfram Sang static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END }; 53d84ca5b3SWolfram Sang 54d84ca5b3SWolfram Sang struct adt7411_data { 55d84ca5b3SWolfram Sang struct mutex device_lock; /* for "atomic" device accesses */ 5623244985SWolfram Sang struct mutex update_lock; 57d84ca5b3SWolfram Sang unsigned long next_update; 581b109c49SMichael Walle long vref_cached; 59eac83cd9SAxel Lin struct i2c_client *client; 60a95da110SMichael Walle bool use_ext_temp; 61d84ca5b3SWolfram Sang }; 62d84ca5b3SWolfram Sang 63d84ca5b3SWolfram Sang /* 64d84ca5b3SWolfram Sang * When reading a register containing (up to 4) lsb, all associated 65d84ca5b3SWolfram Sang * msb-registers get locked by the hardware. After _one_ of those msb is read, 66d84ca5b3SWolfram Sang * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb 67d84ca5b3SWolfram Sang * is protected here with a mutex, too. 68d84ca5b3SWolfram Sang */ 69d84ca5b3SWolfram Sang static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg, 70d84ca5b3SWolfram Sang u8 msb_reg, u8 lsb_shift) 71d84ca5b3SWolfram Sang { 72d84ca5b3SWolfram Sang struct adt7411_data *data = i2c_get_clientdata(client); 73d84ca5b3SWolfram Sang int val, tmp; 74d84ca5b3SWolfram Sang 75d84ca5b3SWolfram Sang mutex_lock(&data->device_lock); 76d84ca5b3SWolfram Sang 77d84ca5b3SWolfram Sang val = i2c_smbus_read_byte_data(client, lsb_reg); 78d84ca5b3SWolfram Sang if (val < 0) 79d84ca5b3SWolfram Sang goto exit_unlock; 80d84ca5b3SWolfram Sang 81d84ca5b3SWolfram Sang tmp = (val >> lsb_shift) & 3; 82d84ca5b3SWolfram Sang val = i2c_smbus_read_byte_data(client, msb_reg); 83d84ca5b3SWolfram Sang 84d84ca5b3SWolfram Sang if (val >= 0) 85d84ca5b3SWolfram Sang val = (val << 2) | tmp; 86d84ca5b3SWolfram Sang 87d84ca5b3SWolfram Sang exit_unlock: 88d84ca5b3SWolfram Sang mutex_unlock(&data->device_lock); 89d84ca5b3SWolfram Sang 90d84ca5b3SWolfram Sang return val; 91d84ca5b3SWolfram Sang } 92d84ca5b3SWolfram Sang 93d84ca5b3SWolfram Sang static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit, 94d84ca5b3SWolfram Sang bool flag) 95d84ca5b3SWolfram Sang { 96d84ca5b3SWolfram Sang struct adt7411_data *data = i2c_get_clientdata(client); 97d84ca5b3SWolfram Sang int ret, val; 98d84ca5b3SWolfram Sang 99d84ca5b3SWolfram Sang mutex_lock(&data->device_lock); 100d84ca5b3SWolfram Sang 101d84ca5b3SWolfram Sang ret = i2c_smbus_read_byte_data(client, reg); 102d84ca5b3SWolfram Sang if (ret < 0) 103d84ca5b3SWolfram Sang goto exit_unlock; 104d84ca5b3SWolfram Sang 105d84ca5b3SWolfram Sang if (flag) 106d84ca5b3SWolfram Sang val = ret | bit; 107d84ca5b3SWolfram Sang else 108d84ca5b3SWolfram Sang val = ret & ~bit; 109d84ca5b3SWolfram Sang 110d84ca5b3SWolfram Sang ret = i2c_smbus_write_byte_data(client, reg, val); 111d84ca5b3SWolfram Sang 112d84ca5b3SWolfram Sang exit_unlock: 113d84ca5b3SWolfram Sang mutex_unlock(&data->device_lock); 114d84ca5b3SWolfram Sang return ret; 115d84ca5b3SWolfram Sang } 116d84ca5b3SWolfram Sang 117d84ca5b3SWolfram Sang static ssize_t adt7411_show_bit(struct device *dev, 118d84ca5b3SWolfram Sang struct device_attribute *attr, char *buf) 119d84ca5b3SWolfram Sang { 120d84ca5b3SWolfram Sang struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr); 121eac83cd9SAxel Lin struct adt7411_data *data = dev_get_drvdata(dev); 122eac83cd9SAxel Lin struct i2c_client *client = data->client; 123d84ca5b3SWolfram Sang int ret = i2c_smbus_read_byte_data(client, attr2->index); 124d84ca5b3SWolfram Sang 125d84ca5b3SWolfram Sang return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr)); 126d84ca5b3SWolfram Sang } 127d84ca5b3SWolfram Sang 128d84ca5b3SWolfram Sang static ssize_t adt7411_set_bit(struct device *dev, 129d84ca5b3SWolfram Sang struct device_attribute *attr, const char *buf, 130d84ca5b3SWolfram Sang size_t count) 131d84ca5b3SWolfram Sang { 132d84ca5b3SWolfram Sang struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr); 133eac83cd9SAxel Lin struct adt7411_data *data = dev_get_drvdata(dev); 134eac83cd9SAxel Lin struct i2c_client *client = data->client; 135d84ca5b3SWolfram Sang int ret; 136d84ca5b3SWolfram Sang unsigned long flag; 137d84ca5b3SWolfram Sang 138179c4fdbSFrans Meulenbroeks ret = kstrtoul(buf, 0, &flag); 139d84ca5b3SWolfram Sang if (ret || flag > 1) 140d84ca5b3SWolfram Sang return -EINVAL; 141d84ca5b3SWolfram Sang 142d84ca5b3SWolfram Sang ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag); 143d84ca5b3SWolfram Sang 144d84ca5b3SWolfram Sang /* force update */ 14523244985SWolfram Sang mutex_lock(&data->update_lock); 146d84ca5b3SWolfram Sang data->next_update = jiffies; 14723244985SWolfram Sang mutex_unlock(&data->update_lock); 148d84ca5b3SWolfram Sang 149d84ca5b3SWolfram Sang return ret < 0 ? ret : count; 150d84ca5b3SWolfram Sang } 151d84ca5b3SWolfram Sang 152d84ca5b3SWolfram Sang #define ADT7411_BIT_ATTR(__name, __reg, __bit) \ 153d84ca5b3SWolfram Sang SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \ 154d84ca5b3SWolfram Sang adt7411_set_bit, __bit, __reg) 155d84ca5b3SWolfram Sang 156d84ca5b3SWolfram Sang static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG); 157d84ca5b3SWolfram Sang static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225); 158d84ca5b3SWolfram Sang static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD); 159d84ca5b3SWolfram Sang 160d84ca5b3SWolfram Sang static struct attribute *adt7411_attrs[] = { 161d84ca5b3SWolfram Sang &sensor_dev_attr_no_average.dev_attr.attr, 162d84ca5b3SWolfram Sang &sensor_dev_attr_fast_sampling.dev_attr.attr, 163d84ca5b3SWolfram Sang &sensor_dev_attr_adc_ref_vdd.dev_attr.attr, 164d84ca5b3SWolfram Sang NULL 165d84ca5b3SWolfram Sang }; 1661b109c49SMichael Walle ATTRIBUTE_GROUPS(adt7411); 167d84ca5b3SWolfram Sang 1681b109c49SMichael Walle static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val) 169a95da110SMichael Walle { 170a95da110SMichael Walle struct adt7411_data *data = dev_get_drvdata(dev); 1711b109c49SMichael Walle struct i2c_client *client = data->client; 1721b109c49SMichael Walle int ret; 173a95da110SMichael Walle 1741b109c49SMichael Walle switch (attr) { 1751b109c49SMichael Walle case hwmon_in_input: 1761b109c49SMichael Walle ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB, 1771b109c49SMichael Walle ADT7411_REG_VDD_MSB, 2); 1781b109c49SMichael Walle if (ret < 0) 1791b109c49SMichael Walle return ret; 1801b109c49SMichael Walle *val = ret * 7000 / 1024; 1811b109c49SMichael Walle return 0; 1821b109c49SMichael Walle default: 1831b109c49SMichael Walle return -EOPNOTSUPP; 1841b109c49SMichael Walle } 185a95da110SMichael Walle } 186a95da110SMichael Walle 1871b109c49SMichael Walle static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel, 1881b109c49SMichael Walle long *val) 1891b109c49SMichael Walle { 1901b109c49SMichael Walle struct adt7411_data *data = dev_get_drvdata(dev); 1911b109c49SMichael Walle struct i2c_client *client = data->client; 1921b109c49SMichael Walle 1931b109c49SMichael Walle int ret; 1941b109c49SMichael Walle int lsb_reg, lsb_shift; 1951b109c49SMichael Walle int nr = channel - 1; 1961b109c49SMichael Walle 1971b109c49SMichael Walle mutex_lock(&data->update_lock); 1981b109c49SMichael Walle if (time_after_eq(jiffies, data->next_update)) { 1991b109c49SMichael Walle ret = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3); 2001b109c49SMichael Walle if (ret < 0) 2011b109c49SMichael Walle goto exit_unlock; 2021b109c49SMichael Walle 2031b109c49SMichael Walle if (ret & ADT7411_CFG3_REF_VDD) { 2041b109c49SMichael Walle ret = adt7411_read_in_vdd(dev, hwmon_in_input, 2051b109c49SMichael Walle &data->vref_cached); 2061b109c49SMichael Walle if (ret < 0) 2071b109c49SMichael Walle goto exit_unlock; 2081b109c49SMichael Walle } else { 2091b109c49SMichael Walle data->vref_cached = 2250; 2101b109c49SMichael Walle } 2111b109c49SMichael Walle 2121b109c49SMichael Walle data->next_update = jiffies + HZ; 2131b109c49SMichael Walle } 2141b109c49SMichael Walle 2151b109c49SMichael Walle switch (attr) { 2161b109c49SMichael Walle case hwmon_in_input: 2171b109c49SMichael Walle lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2); 2181b109c49SMichael Walle lsb_shift = 2 * (nr & 0x03); 2191b109c49SMichael Walle ret = adt7411_read_10_bit(client, lsb_reg, 2201b109c49SMichael Walle ADT7411_REG_EXT_TEMP_AIN1_MSB + nr, 2211b109c49SMichael Walle lsb_shift); 2221b109c49SMichael Walle if (ret < 0) 2231b109c49SMichael Walle goto exit_unlock; 2241b109c49SMichael Walle *val = ret * data->vref_cached / 1024; 2251b109c49SMichael Walle ret = 0; 2261b109c49SMichael Walle break; 2271b109c49SMichael Walle default: 2281b109c49SMichael Walle ret = -EOPNOTSUPP; 2291b109c49SMichael Walle break; 2301b109c49SMichael Walle } 2311b109c49SMichael Walle exit_unlock: 2321b109c49SMichael Walle mutex_unlock(&data->update_lock); 2331b109c49SMichael Walle return ret; 2341b109c49SMichael Walle } 2351b109c49SMichael Walle 2361b109c49SMichael Walle static int adt7411_read_in(struct device *dev, u32 attr, int channel, 2371b109c49SMichael Walle long *val) 2381b109c49SMichael Walle { 2391b109c49SMichael Walle if (channel == 0) 2401b109c49SMichael Walle return adt7411_read_in_vdd(dev, attr, val); 2411b109c49SMichael Walle else 2421b109c49SMichael Walle return adt7411_read_in_chan(dev, attr, channel, val); 2431b109c49SMichael Walle } 2441b109c49SMichael Walle 2451b109c49SMichael Walle static int adt7411_read_temp(struct device *dev, u32 attr, int channel, 2461b109c49SMichael Walle long *val) 2471b109c49SMichael Walle { 2481b109c49SMichael Walle struct adt7411_data *data = dev_get_drvdata(dev); 2491b109c49SMichael Walle struct i2c_client *client = data->client; 2501b109c49SMichael Walle int ret, regl, regh; 2511b109c49SMichael Walle 2521b109c49SMichael Walle switch (attr) { 2531b109c49SMichael Walle case hwmon_temp_input: 2541b109c49SMichael Walle regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB : 2551b109c49SMichael Walle ADT7411_REG_INT_TEMP_VDD_LSB; 2561b109c49SMichael Walle regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB : 2571b109c49SMichael Walle ADT7411_REG_INT_TEMP_MSB; 2581b109c49SMichael Walle ret = adt7411_read_10_bit(client, regl, regh, 0); 2591b109c49SMichael Walle if (ret < 0) 2601b109c49SMichael Walle return ret; 2611b109c49SMichael Walle ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */ 2621b109c49SMichael Walle *val = ret * 250; 2631b109c49SMichael Walle return 0; 2641b109c49SMichael Walle default: 2651b109c49SMichael Walle return -EOPNOTSUPP; 2661b109c49SMichael Walle } 2671b109c49SMichael Walle } 2681b109c49SMichael Walle 2691b109c49SMichael Walle static int adt7411_read(struct device *dev, enum hwmon_sensor_types type, 2701b109c49SMichael Walle u32 attr, int channel, long *val) 2711b109c49SMichael Walle { 2721b109c49SMichael Walle switch (type) { 2731b109c49SMichael Walle case hwmon_in: 2741b109c49SMichael Walle return adt7411_read_in(dev, attr, channel, val); 2751b109c49SMichael Walle case hwmon_temp: 2761b109c49SMichael Walle return adt7411_read_temp(dev, attr, channel, val); 2771b109c49SMichael Walle default: 2781b109c49SMichael Walle return -EOPNOTSUPP; 2791b109c49SMichael Walle } 2801b109c49SMichael Walle } 2811b109c49SMichael Walle 2821b109c49SMichael Walle static umode_t adt7411_is_visible(const void *_data, 2831b109c49SMichael Walle enum hwmon_sensor_types type, 2841b109c49SMichael Walle u32 attr, int channel) 2851b109c49SMichael Walle { 2861b109c49SMichael Walle const struct adt7411_data *data = _data; 2871b109c49SMichael Walle 2881b109c49SMichael Walle switch (type) { 2891b109c49SMichael Walle case hwmon_in: 2901b109c49SMichael Walle if (channel > 0 && channel < 3) 2911b109c49SMichael Walle return data->use_ext_temp ? 0 : S_IRUGO; 2921b109c49SMichael Walle else 2931b109c49SMichael Walle return S_IRUGO; 2941b109c49SMichael Walle case hwmon_temp: 2951b109c49SMichael Walle if (channel == 1) 2961b109c49SMichael Walle return data->use_ext_temp ? S_IRUGO : 0; 2971b109c49SMichael Walle else 2981b109c49SMichael Walle return S_IRUGO; 2991b109c49SMichael Walle default: 3001b109c49SMichael Walle return 0; 3011b109c49SMichael Walle } 3021b109c49SMichael Walle } 303d84ca5b3SWolfram Sang 304d84ca5b3SWolfram Sang static int adt7411_detect(struct i2c_client *client, 305d84ca5b3SWolfram Sang struct i2c_board_info *info) 306d84ca5b3SWolfram Sang { 307d84ca5b3SWolfram Sang int val; 308d84ca5b3SWolfram Sang 309d84ca5b3SWolfram Sang if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 310d84ca5b3SWolfram Sang return -ENODEV; 311d84ca5b3SWolfram Sang 312d84ca5b3SWolfram Sang val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID); 313d84ca5b3SWolfram Sang if (val < 0 || val != ADT7411_MANUFACTURER_ID) { 314b55f3757SGuenter Roeck dev_dbg(&client->dev, 315b55f3757SGuenter Roeck "Wrong manufacturer ID. Got %d, expected %d\n", 316b55f3757SGuenter Roeck val, ADT7411_MANUFACTURER_ID); 317d84ca5b3SWolfram Sang return -ENODEV; 318d84ca5b3SWolfram Sang } 319d84ca5b3SWolfram Sang 320d84ca5b3SWolfram Sang val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID); 321d84ca5b3SWolfram Sang if (val < 0 || val != ADT7411_DEVICE_ID) { 322b55f3757SGuenter Roeck dev_dbg(&client->dev, 323b55f3757SGuenter Roeck "Wrong device ID. Got %d, expected %d\n", 324b55f3757SGuenter Roeck val, ADT7411_DEVICE_ID); 325d84ca5b3SWolfram Sang return -ENODEV; 326d84ca5b3SWolfram Sang } 327d84ca5b3SWolfram Sang 328d84ca5b3SWolfram Sang strlcpy(info->type, "adt7411", I2C_NAME_SIZE); 329d84ca5b3SWolfram Sang 330d84ca5b3SWolfram Sang return 0; 331d84ca5b3SWolfram Sang } 332d84ca5b3SWolfram Sang 333601807bbSMichael Walle static int adt7411_init_device(struct adt7411_data *data) 334601807bbSMichael Walle { 335601807bbSMichael Walle int ret; 336601807bbSMichael Walle u8 val; 337601807bbSMichael Walle 338601807bbSMichael Walle ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3); 339601807bbSMichael Walle if (ret < 0) 340601807bbSMichael Walle return ret; 341601807bbSMichael Walle 342601807bbSMichael Walle /* 343601807bbSMichael Walle * We must only write zero to bit 1 and bit 2 and only one to bit 3 344601807bbSMichael Walle * according to the datasheet. 345601807bbSMichael Walle */ 346601807bbSMichael Walle val = ret; 347601807bbSMichael Walle val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2); 348601807bbSMichael Walle val |= ADT7411_CFG3_RESERVED_BIT3; 349601807bbSMichael Walle 350601807bbSMichael Walle ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val); 351601807bbSMichael Walle if (ret < 0) 352601807bbSMichael Walle return ret; 353601807bbSMichael Walle 354601807bbSMichael Walle ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1); 355601807bbSMichael Walle if (ret < 0) 356601807bbSMichael Walle return ret; 357601807bbSMichael Walle 358a95da110SMichael Walle data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM; 359a95da110SMichael Walle 360601807bbSMichael Walle /* 361601807bbSMichael Walle * We must only write zero to bit 1 and only one to bit 3 according to 362601807bbSMichael Walle * the datasheet. 363601807bbSMichael Walle */ 364601807bbSMichael Walle val = ret; 365601807bbSMichael Walle val &= ~ADT7411_CFG1_RESERVED_BIT1; 366601807bbSMichael Walle val |= ADT7411_CFG1_RESERVED_BIT3; 367601807bbSMichael Walle 368601807bbSMichael Walle /* enable monitoring */ 369601807bbSMichael Walle val |= ADT7411_CFG1_START_MONITOR; 370601807bbSMichael Walle 371601807bbSMichael Walle return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val); 372601807bbSMichael Walle } 373601807bbSMichael Walle 3741b109c49SMichael Walle static const u32 adt7411_in_config[] = { 3751b109c49SMichael Walle HWMON_I_INPUT, 3761b109c49SMichael Walle HWMON_I_INPUT, 3771b109c49SMichael Walle HWMON_I_INPUT, 3781b109c49SMichael Walle HWMON_I_INPUT, 3791b109c49SMichael Walle HWMON_I_INPUT, 3801b109c49SMichael Walle HWMON_I_INPUT, 3811b109c49SMichael Walle HWMON_I_INPUT, 3821b109c49SMichael Walle HWMON_I_INPUT, 3831b109c49SMichael Walle HWMON_I_INPUT, 3841b109c49SMichael Walle 0 3851b109c49SMichael Walle }; 3861b109c49SMichael Walle 3871b109c49SMichael Walle static const struct hwmon_channel_info adt7411_in = { 3881b109c49SMichael Walle .type = hwmon_in, 3891b109c49SMichael Walle .config = adt7411_in_config, 3901b109c49SMichael Walle }; 3911b109c49SMichael Walle 3921b109c49SMichael Walle static const u32 adt7411_temp_config[] = { 3931b109c49SMichael Walle HWMON_T_INPUT, 3941b109c49SMichael Walle HWMON_T_INPUT, 3951b109c49SMichael Walle 0 3961b109c49SMichael Walle }; 3971b109c49SMichael Walle 3981b109c49SMichael Walle static const struct hwmon_channel_info adt7411_temp = { 3991b109c49SMichael Walle .type = hwmon_temp, 4001b109c49SMichael Walle .config = adt7411_temp_config, 4011b109c49SMichael Walle }; 4021b109c49SMichael Walle 4031b109c49SMichael Walle static const struct hwmon_channel_info *adt7411_info[] = { 4041b109c49SMichael Walle &adt7411_in, 4051b109c49SMichael Walle &adt7411_temp, 4061b109c49SMichael Walle NULL 4071b109c49SMichael Walle }; 4081b109c49SMichael Walle 4091b109c49SMichael Walle static const struct hwmon_ops adt7411_hwmon_ops = { 4101b109c49SMichael Walle .is_visible = adt7411_is_visible, 4111b109c49SMichael Walle .read = adt7411_read, 4121b109c49SMichael Walle }; 4131b109c49SMichael Walle 4141b109c49SMichael Walle static const struct hwmon_chip_info adt7411_chip_info = { 4151b109c49SMichael Walle .ops = &adt7411_hwmon_ops, 4161b109c49SMichael Walle .info = adt7411_info, 4171b109c49SMichael Walle }; 4181b109c49SMichael Walle 4196c931ae1SBill Pemberton static int adt7411_probe(struct i2c_client *client, 420d84ca5b3SWolfram Sang const struct i2c_device_id *id) 421d84ca5b3SWolfram Sang { 422eac83cd9SAxel Lin struct device *dev = &client->dev; 423d84ca5b3SWolfram Sang struct adt7411_data *data; 424eac83cd9SAxel Lin struct device *hwmon_dev; 425d84ca5b3SWolfram Sang int ret; 426d84ca5b3SWolfram Sang 427eac83cd9SAxel Lin data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 428d84ca5b3SWolfram Sang if (!data) 429d84ca5b3SWolfram Sang return -ENOMEM; 430d84ca5b3SWolfram Sang 431d84ca5b3SWolfram Sang i2c_set_clientdata(client, data); 432eac83cd9SAxel Lin data->client = client; 433d84ca5b3SWolfram Sang mutex_init(&data->device_lock); 43423244985SWolfram Sang mutex_init(&data->update_lock); 435d84ca5b3SWolfram Sang 436601807bbSMichael Walle ret = adt7411_init_device(data); 437d84ca5b3SWolfram Sang if (ret < 0) 43865ec17b0SGuenter Roeck return ret; 439d84ca5b3SWolfram Sang 440d84ca5b3SWolfram Sang /* force update on first occasion */ 441d84ca5b3SWolfram Sang data->next_update = jiffies; 442d84ca5b3SWolfram Sang 4431b109c49SMichael Walle hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, 444eac83cd9SAxel Lin data, 4451b109c49SMichael Walle &adt7411_chip_info, 446eac83cd9SAxel Lin adt7411_groups); 447eac83cd9SAxel Lin return PTR_ERR_OR_ZERO(hwmon_dev); 448d84ca5b3SWolfram Sang } 449d84ca5b3SWolfram Sang 450d84ca5b3SWolfram Sang static const struct i2c_device_id adt7411_id[] = { 451d84ca5b3SWolfram Sang { "adt7411", 0 }, 452d84ca5b3SWolfram Sang { } 453d84ca5b3SWolfram Sang }; 454a7254d68Saxel lin MODULE_DEVICE_TABLE(i2c, adt7411_id); 455d84ca5b3SWolfram Sang 456d84ca5b3SWolfram Sang static struct i2c_driver adt7411_driver = { 457d84ca5b3SWolfram Sang .driver = { 458d84ca5b3SWolfram Sang .name = "adt7411", 459d84ca5b3SWolfram Sang }, 460d84ca5b3SWolfram Sang .probe = adt7411_probe, 461d84ca5b3SWolfram Sang .id_table = adt7411_id, 462d84ca5b3SWolfram Sang .detect = adt7411_detect, 463d84ca5b3SWolfram Sang .address_list = normal_i2c, 464d84ca5b3SWolfram Sang .class = I2C_CLASS_HWMON, 465d84ca5b3SWolfram Sang }; 466d84ca5b3SWolfram Sang 467f0967eeaSAxel Lin module_i2c_driver(adt7411_driver); 468d84ca5b3SWolfram Sang 469d84ca5b3SWolfram Sang MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de> and " 470d84ca5b3SWolfram Sang "Wolfram Sang <w.sang@pengutronix.de>"); 471d84ca5b3SWolfram Sang MODULE_DESCRIPTION("ADT7411 driver"); 472d84ca5b3SWolfram Sang MODULE_LICENSE("GPL v2"); 473