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720 lines
18 KiB
720 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor) |
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* |
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* Copyright (C) 2008, 2010 Pengutronix |
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* |
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* TODO: SPI, use power-down mode for suspend?, interrupt handling? |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/err.h> |
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#include <linux/mutex.h> |
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#include <linux/jiffies.h> |
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#include <linux/i2c.h> |
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#include <linux/hwmon.h> |
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#include <linux/hwmon-sysfs.h> |
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#include <linux/slab.h> |
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#define ADT7411_REG_STAT_1 0x00 |
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#define ADT7411_STAT_1_INT_TEMP_HIGH BIT(0) |
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#define ADT7411_STAT_1_INT_TEMP_LOW BIT(1) |
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#define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 BIT(2) |
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#define ADT7411_STAT_1_EXT_TEMP_LOW BIT(3) |
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#define ADT7411_STAT_1_EXT_TEMP_FAULT BIT(4) |
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#define ADT7411_STAT_1_AIN2 BIT(5) |
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#define ADT7411_STAT_1_AIN3 BIT(6) |
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#define ADT7411_STAT_1_AIN4 BIT(7) |
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#define ADT7411_REG_STAT_2 0x01 |
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#define ADT7411_STAT_2_AIN5 BIT(0) |
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#define ADT7411_STAT_2_AIN6 BIT(1) |
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#define ADT7411_STAT_2_AIN7 BIT(2) |
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#define ADT7411_STAT_2_AIN8 BIT(3) |
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#define ADT7411_STAT_2_VDD BIT(4) |
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#define ADT7411_REG_INT_TEMP_VDD_LSB 0x03 |
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#define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04 |
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#define ADT7411_REG_VDD_MSB 0x06 |
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#define ADT7411_REG_INT_TEMP_MSB 0x07 |
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#define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08 |
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#define ADT7411_REG_CFG1 0x18 |
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#define ADT7411_CFG1_START_MONITOR BIT(0) |
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#define ADT7411_CFG1_RESERVED_BIT1 BIT(1) |
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#define ADT7411_CFG1_EXT_TDM BIT(2) |
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#define ADT7411_CFG1_RESERVED_BIT3 BIT(3) |
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#define ADT7411_REG_CFG2 0x19 |
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#define ADT7411_CFG2_DISABLE_AVG BIT(5) |
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#define ADT7411_REG_CFG3 0x1a |
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#define ADT7411_CFG3_ADC_CLK_225 BIT(0) |
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#define ADT7411_CFG3_RESERVED_BIT1 BIT(1) |
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#define ADT7411_CFG3_RESERVED_BIT2 BIT(2) |
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#define ADT7411_CFG3_RESERVED_BIT3 BIT(3) |
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#define ADT7411_CFG3_REF_VDD BIT(4) |
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#define ADT7411_REG_VDD_HIGH 0x23 |
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#define ADT7411_REG_VDD_LOW 0x24 |
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#define ADT7411_REG_TEMP_HIGH(nr) (0x25 + 2 * (nr)) |
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#define ADT7411_REG_TEMP_LOW(nr) (0x26 + 2 * (nr)) |
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#define ADT7411_REG_IN_HIGH(nr) ((nr) > 1 \ |
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? 0x2b + 2 * ((nr)-2) \ |
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: 0x27) |
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#define ADT7411_REG_IN_LOW(nr) ((nr) > 1 \ |
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? 0x2c + 2 * ((nr)-2) \ |
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: 0x28) |
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#define ADT7411_REG_DEVICE_ID 0x4d |
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#define ADT7411_REG_MANUFACTURER_ID 0x4e |
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#define ADT7411_DEVICE_ID 0x2 |
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#define ADT7411_MANUFACTURER_ID 0x41 |
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static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END }; |
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static const u8 adt7411_in_alarm_reg[] = { |
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ADT7411_REG_STAT_2, |
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ADT7411_REG_STAT_1, |
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ADT7411_REG_STAT_1, |
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ADT7411_REG_STAT_1, |
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ADT7411_REG_STAT_1, |
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ADT7411_REG_STAT_2, |
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ADT7411_REG_STAT_2, |
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ADT7411_REG_STAT_2, |
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ADT7411_REG_STAT_2, |
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}; |
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static const u8 adt7411_in_alarm_bits[] = { |
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ADT7411_STAT_2_VDD, |
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ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1, |
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ADT7411_STAT_1_AIN2, |
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ADT7411_STAT_1_AIN3, |
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ADT7411_STAT_1_AIN4, |
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ADT7411_STAT_2_AIN5, |
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ADT7411_STAT_2_AIN6, |
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ADT7411_STAT_2_AIN7, |
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ADT7411_STAT_2_AIN8, |
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}; |
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struct adt7411_data { |
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struct mutex device_lock; /* for "atomic" device accesses */ |
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struct mutex update_lock; |
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unsigned long next_update; |
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long vref_cached; |
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struct i2c_client *client; |
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bool use_ext_temp; |
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}; |
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/* |
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* When reading a register containing (up to 4) lsb, all associated |
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* msb-registers get locked by the hardware. After _one_ of those msb is read, |
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* _all_ are unlocked. In order to use this locking correctly, reading lsb/msb |
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* is protected here with a mutex, too. |
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*/ |
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static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg, |
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u8 msb_reg, u8 lsb_shift) |
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{ |
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struct adt7411_data *data = i2c_get_clientdata(client); |
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int val, tmp; |
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mutex_lock(&data->device_lock); |
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val = i2c_smbus_read_byte_data(client, lsb_reg); |
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if (val < 0) |
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goto exit_unlock; |
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tmp = (val >> lsb_shift) & 3; |
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val = i2c_smbus_read_byte_data(client, msb_reg); |
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if (val >= 0) |
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val = (val << 2) | tmp; |
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exit_unlock: |
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mutex_unlock(&data->device_lock); |
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return val; |
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} |
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static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit, |
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bool flag) |
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{ |
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struct adt7411_data *data = i2c_get_clientdata(client); |
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int ret, val; |
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mutex_lock(&data->device_lock); |
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ret = i2c_smbus_read_byte_data(client, reg); |
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if (ret < 0) |
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goto exit_unlock; |
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if (flag) |
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val = ret | bit; |
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else |
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val = ret & ~bit; |
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ret = i2c_smbus_write_byte_data(client, reg, val); |
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exit_unlock: |
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mutex_unlock(&data->device_lock); |
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return ret; |
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} |
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static ssize_t adt7411_show_bit(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr); |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int ret = i2c_smbus_read_byte_data(client, attr2->index); |
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return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr)); |
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} |
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static ssize_t adt7411_set_bit(struct device *dev, |
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struct device_attribute *attr, const char *buf, |
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size_t count) |
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{ |
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struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr); |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int ret; |
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unsigned long flag; |
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ret = kstrtoul(buf, 0, &flag); |
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if (ret || flag > 1) |
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return -EINVAL; |
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ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag); |
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/* force update */ |
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mutex_lock(&data->update_lock); |
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data->next_update = jiffies; |
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mutex_unlock(&data->update_lock); |
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return ret < 0 ? ret : count; |
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} |
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#define ADT7411_BIT_ATTR(__name, __reg, __bit) \ |
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SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \ |
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adt7411_set_bit, __bit, __reg) |
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static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG); |
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static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225); |
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static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD); |
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static struct attribute *adt7411_attrs[] = { |
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&sensor_dev_attr_no_average.dev_attr.attr, |
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&sensor_dev_attr_fast_sampling.dev_attr.attr, |
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&sensor_dev_attr_adc_ref_vdd.dev_attr.attr, |
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NULL |
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}; |
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ATTRIBUTE_GROUPS(adt7411); |
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static int adt7411_read_in_alarm(struct device *dev, int channel, long *val) |
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{ |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int ret; |
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ret = i2c_smbus_read_byte_data(client, adt7411_in_alarm_reg[channel]); |
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if (ret < 0) |
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return ret; |
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*val = !!(ret & adt7411_in_alarm_bits[channel]); |
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return 0; |
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} |
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static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val) |
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{ |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int ret; |
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switch (attr) { |
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case hwmon_in_input: |
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ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB, |
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ADT7411_REG_VDD_MSB, 2); |
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if (ret < 0) |
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return ret; |
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*val = ret * 7000 / 1024; |
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return 0; |
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case hwmon_in_min: |
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ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_LOW); |
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if (ret < 0) |
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return ret; |
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*val = ret * 7000 / 256; |
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return 0; |
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case hwmon_in_max: |
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ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_HIGH); |
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if (ret < 0) |
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return ret; |
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*val = ret * 7000 / 256; |
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return 0; |
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case hwmon_in_alarm: |
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return adt7411_read_in_alarm(dev, 0, val); |
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default: |
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return -EOPNOTSUPP; |
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} |
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} |
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static int adt7411_update_vref(struct device *dev) |
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{ |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int val; |
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if (time_after_eq(jiffies, data->next_update)) { |
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val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3); |
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if (val < 0) |
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return val; |
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if (val & ADT7411_CFG3_REF_VDD) { |
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val = adt7411_read_in_vdd(dev, hwmon_in_input, |
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&data->vref_cached); |
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if (val < 0) |
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return val; |
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} else { |
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data->vref_cached = 2250; |
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} |
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data->next_update = jiffies + HZ; |
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} |
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return 0; |
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} |
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static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel, |
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long *val) |
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{ |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int ret; |
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int reg, lsb_reg, lsb_shift; |
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int nr = channel - 1; |
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mutex_lock(&data->update_lock); |
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ret = adt7411_update_vref(dev); |
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if (ret < 0) |
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goto exit_unlock; |
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switch (attr) { |
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case hwmon_in_input: |
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lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2); |
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lsb_shift = 2 * (nr & 0x03); |
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ret = adt7411_read_10_bit(client, lsb_reg, |
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ADT7411_REG_EXT_TEMP_AIN1_MSB + nr, |
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lsb_shift); |
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if (ret < 0) |
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goto exit_unlock; |
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*val = ret * data->vref_cached / 1024; |
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ret = 0; |
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break; |
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case hwmon_in_min: |
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case hwmon_in_max: |
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reg = (attr == hwmon_in_min) |
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? ADT7411_REG_IN_LOW(channel) |
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: ADT7411_REG_IN_HIGH(channel); |
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ret = i2c_smbus_read_byte_data(client, reg); |
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if (ret < 0) |
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goto exit_unlock; |
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*val = ret * data->vref_cached / 256; |
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ret = 0; |
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break; |
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case hwmon_in_alarm: |
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ret = adt7411_read_in_alarm(dev, channel, val); |
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break; |
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default: |
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ret = -EOPNOTSUPP; |
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break; |
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} |
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exit_unlock: |
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mutex_unlock(&data->update_lock); |
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return ret; |
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} |
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static int adt7411_read_in(struct device *dev, u32 attr, int channel, |
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long *val) |
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{ |
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if (channel == 0) |
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return adt7411_read_in_vdd(dev, attr, val); |
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else |
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return adt7411_read_in_chan(dev, attr, channel, val); |
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} |
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static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel, |
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long *val) |
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{ |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int ret, bit; |
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ret = i2c_smbus_read_byte_data(client, ADT7411_REG_STAT_1); |
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if (ret < 0) |
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return ret; |
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switch (attr) { |
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case hwmon_temp_min_alarm: |
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bit = channel ? ADT7411_STAT_1_EXT_TEMP_LOW |
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: ADT7411_STAT_1_INT_TEMP_LOW; |
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break; |
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case hwmon_temp_max_alarm: |
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bit = channel ? ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 |
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: ADT7411_STAT_1_INT_TEMP_HIGH; |
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break; |
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case hwmon_temp_fault: |
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bit = ADT7411_STAT_1_EXT_TEMP_FAULT; |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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*val = !!(ret & bit); |
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return 0; |
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} |
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static int adt7411_read_temp(struct device *dev, u32 attr, int channel, |
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long *val) |
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{ |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int ret, reg, regl, regh; |
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switch (attr) { |
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case hwmon_temp_input: |
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regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB : |
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ADT7411_REG_INT_TEMP_VDD_LSB; |
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regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB : |
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ADT7411_REG_INT_TEMP_MSB; |
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ret = adt7411_read_10_bit(client, regl, regh, 0); |
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if (ret < 0) |
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return ret; |
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ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */ |
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*val = ret * 250; |
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return 0; |
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case hwmon_temp_min: |
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case hwmon_temp_max: |
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reg = (attr == hwmon_temp_min) |
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? ADT7411_REG_TEMP_LOW(channel) |
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: ADT7411_REG_TEMP_HIGH(channel); |
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ret = i2c_smbus_read_byte_data(client, reg); |
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if (ret < 0) |
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return ret; |
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ret = ret & 0x80 ? ret - 0x100 : ret; /* 8 bit signed */ |
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*val = ret * 1000; |
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return 0; |
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case hwmon_temp_min_alarm: |
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case hwmon_temp_max_alarm: |
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case hwmon_temp_fault: |
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return adt7411_read_temp_alarm(dev, attr, channel, val); |
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default: |
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return -EOPNOTSUPP; |
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} |
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} |
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static int adt7411_read(struct device *dev, enum hwmon_sensor_types type, |
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u32 attr, int channel, long *val) |
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{ |
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switch (type) { |
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case hwmon_in: |
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return adt7411_read_in(dev, attr, channel, val); |
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case hwmon_temp: |
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return adt7411_read_temp(dev, attr, channel, val); |
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default: |
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return -EOPNOTSUPP; |
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} |
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} |
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static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val) |
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{ |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int reg; |
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val = clamp_val(val, 0, 255 * 7000 / 256); |
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val = DIV_ROUND_CLOSEST(val * 256, 7000); |
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switch (attr) { |
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case hwmon_in_min: |
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reg = ADT7411_REG_VDD_LOW; |
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break; |
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case hwmon_in_max: |
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reg = ADT7411_REG_VDD_HIGH; |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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return i2c_smbus_write_byte_data(client, reg, val); |
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} |
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static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel, |
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long val) |
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{ |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int ret, reg; |
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mutex_lock(&data->update_lock); |
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ret = adt7411_update_vref(dev); |
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if (ret < 0) |
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goto exit_unlock; |
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val = clamp_val(val, 0, 255 * data->vref_cached / 256); |
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val = DIV_ROUND_CLOSEST(val * 256, data->vref_cached); |
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switch (attr) { |
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case hwmon_in_min: |
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reg = ADT7411_REG_IN_LOW(channel); |
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break; |
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case hwmon_in_max: |
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reg = ADT7411_REG_IN_HIGH(channel); |
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break; |
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default: |
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ret = -EOPNOTSUPP; |
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goto exit_unlock; |
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} |
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ret = i2c_smbus_write_byte_data(client, reg, val); |
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exit_unlock: |
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mutex_unlock(&data->update_lock); |
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return ret; |
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} |
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static int adt7411_write_in(struct device *dev, u32 attr, int channel, |
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long val) |
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{ |
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if (channel == 0) |
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return adt7411_write_in_vdd(dev, attr, val); |
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else |
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return adt7411_write_in_chan(dev, attr, channel, val); |
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} |
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static int adt7411_write_temp(struct device *dev, u32 attr, int channel, |
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long val) |
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{ |
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struct adt7411_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int reg; |
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val = clamp_val(val, -128000, 127000); |
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val = DIV_ROUND_CLOSEST(val, 1000); |
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switch (attr) { |
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case hwmon_temp_min: |
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reg = ADT7411_REG_TEMP_LOW(channel); |
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break; |
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case hwmon_temp_max: |
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reg = ADT7411_REG_TEMP_HIGH(channel); |
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break; |
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default: |
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return -EOPNOTSUPP; |
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} |
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return i2c_smbus_write_byte_data(client, reg, val); |
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} |
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static int adt7411_write(struct device *dev, enum hwmon_sensor_types type, |
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u32 attr, int channel, long val) |
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{ |
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switch (type) { |
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case hwmon_in: |
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return adt7411_write_in(dev, attr, channel, val); |
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case hwmon_temp: |
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return adt7411_write_temp(dev, attr, channel, val); |
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default: |
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return -EOPNOTSUPP; |
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} |
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} |
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|
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static umode_t adt7411_is_visible(const void *_data, |
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enum hwmon_sensor_types type, |
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u32 attr, int channel) |
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{ |
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const struct adt7411_data *data = _data; |
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bool visible; |
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|
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switch (type) { |
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case hwmon_in: |
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visible = channel == 0 || channel >= 3 || !data->use_ext_temp; |
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switch (attr) { |
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case hwmon_in_input: |
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case hwmon_in_alarm: |
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return visible ? S_IRUGO : 0; |
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case hwmon_in_min: |
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case hwmon_in_max: |
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return visible ? S_IRUGO | S_IWUSR : 0; |
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} |
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break; |
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case hwmon_temp: |
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visible = channel == 0 || data->use_ext_temp; |
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switch (attr) { |
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case hwmon_temp_input: |
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case hwmon_temp_min_alarm: |
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case hwmon_temp_max_alarm: |
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case hwmon_temp_fault: |
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return visible ? S_IRUGO : 0; |
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case hwmon_temp_min: |
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case hwmon_temp_max: |
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return visible ? S_IRUGO | S_IWUSR : 0; |
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} |
|
break; |
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default: |
|
break; |
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} |
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return 0; |
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} |
|
|
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static int adt7411_detect(struct i2c_client *client, |
|
struct i2c_board_info *info) |
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{ |
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int val; |
|
|
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
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return -ENODEV; |
|
|
|
val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID); |
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if (val < 0 || val != ADT7411_MANUFACTURER_ID) { |
|
dev_dbg(&client->dev, |
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"Wrong manufacturer ID. Got %d, expected %d\n", |
|
val, ADT7411_MANUFACTURER_ID); |
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return -ENODEV; |
|
} |
|
|
|
val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID); |
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if (val < 0 || val != ADT7411_DEVICE_ID) { |
|
dev_dbg(&client->dev, |
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"Wrong device ID. Got %d, expected %d\n", |
|
val, ADT7411_DEVICE_ID); |
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return -ENODEV; |
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} |
|
|
|
strlcpy(info->type, "adt7411", I2C_NAME_SIZE); |
|
|
|
return 0; |
|
} |
|
|
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static int adt7411_init_device(struct adt7411_data *data) |
|
{ |
|
int ret; |
|
u8 val; |
|
|
|
ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* |
|
* We must only write zero to bit 1 and bit 2 and only one to bit 3 |
|
* according to the datasheet. |
|
*/ |
|
val = ret; |
|
val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2); |
|
val |= ADT7411_CFG3_RESERVED_BIT3; |
|
|
|
ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1); |
|
if (ret < 0) |
|
return ret; |
|
|
|
data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM; |
|
|
|
/* |
|
* We must only write zero to bit 1 and only one to bit 3 according to |
|
* the datasheet. |
|
*/ |
|
val = ret; |
|
val &= ~ADT7411_CFG1_RESERVED_BIT1; |
|
val |= ADT7411_CFG1_RESERVED_BIT3; |
|
|
|
/* enable monitoring */ |
|
val |= ADT7411_CFG1_START_MONITOR; |
|
|
|
return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val); |
|
} |
|
|
|
static const struct hwmon_channel_info *adt7411_info[] = { |
|
HWMON_CHANNEL_INFO(in, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, |
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM), |
|
HWMON_CHANNEL_INFO(temp, |
|
HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM | |
|
HWMON_T_MAX | HWMON_T_MAX_ALARM, |
|
HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM | |
|
HWMON_T_MAX | HWMON_T_MAX_ALARM | HWMON_T_FAULT), |
|
NULL |
|
}; |
|
|
|
static const struct hwmon_ops adt7411_hwmon_ops = { |
|
.is_visible = adt7411_is_visible, |
|
.read = adt7411_read, |
|
.write = adt7411_write, |
|
}; |
|
|
|
static const struct hwmon_chip_info adt7411_chip_info = { |
|
.ops = &adt7411_hwmon_ops, |
|
.info = adt7411_info, |
|
}; |
|
|
|
static int adt7411_probe(struct i2c_client *client) |
|
{ |
|
struct device *dev = &client->dev; |
|
struct adt7411_data *data; |
|
struct device *hwmon_dev; |
|
int ret; |
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
i2c_set_clientdata(client, data); |
|
data->client = client; |
|
mutex_init(&data->device_lock); |
|
mutex_init(&data->update_lock); |
|
|
|
ret = adt7411_init_device(data); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* force update on first occasion */ |
|
data->next_update = jiffies; |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, |
|
data, |
|
&adt7411_chip_info, |
|
adt7411_groups); |
|
return PTR_ERR_OR_ZERO(hwmon_dev); |
|
} |
|
|
|
static const struct i2c_device_id adt7411_id[] = { |
|
{ "adt7411", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, adt7411_id); |
|
|
|
static struct i2c_driver adt7411_driver = { |
|
.driver = { |
|
.name = "adt7411", |
|
}, |
|
.probe_new = adt7411_probe, |
|
.id_table = adt7411_id, |
|
.detect = adt7411_detect, |
|
.address_list = normal_i2c, |
|
.class = I2C_CLASS_HWMON, |
|
}; |
|
|
|
module_i2c_driver(adt7411_driver); |
|
|
|
MODULE_AUTHOR("Sascha Hauer, Wolfram Sang <[email protected]>"); |
|
MODULE_DESCRIPTION("ADT7411 driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|