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733 lines
20 KiB
733 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Driver for Texas Instruments / National Semiconductor LM95234 |
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* |
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* Copyright (c) 2013, 2014 Guenter Roeck <[email protected]> |
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* |
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* Derived from lm95241.c |
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* Copyright (C) 2008, 2010 Davide Rizzo <[email protected]> |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/slab.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/err.h> |
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#include <linux/mutex.h> |
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#include <linux/sysfs.h> |
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|
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#define DRVNAME "lm95234" |
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|
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enum chips { lm95233, lm95234 }; |
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|
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static const unsigned short normal_i2c[] = { |
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0x18, 0x2a, 0x2b, 0x4d, 0x4e, I2C_CLIENT_END }; |
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|
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/* LM95234 registers */ |
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#define LM95234_REG_MAN_ID 0xFE |
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#define LM95234_REG_CHIP_ID 0xFF |
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#define LM95234_REG_STATUS 0x02 |
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#define LM95234_REG_CONFIG 0x03 |
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#define LM95234_REG_CONVRATE 0x04 |
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#define LM95234_REG_STS_FAULT 0x07 |
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#define LM95234_REG_STS_TCRIT1 0x08 |
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#define LM95234_REG_STS_TCRIT2 0x09 |
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#define LM95234_REG_TEMPH(x) ((x) + 0x10) |
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#define LM95234_REG_TEMPL(x) ((x) + 0x20) |
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#define LM95234_REG_UTEMPH(x) ((x) + 0x19) /* Remote only */ |
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#define LM95234_REG_UTEMPL(x) ((x) + 0x29) |
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#define LM95234_REG_REM_MODEL 0x30 |
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#define LM95234_REG_REM_MODEL_STS 0x38 |
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#define LM95234_REG_OFFSET(x) ((x) + 0x31) /* Remote only */ |
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#define LM95234_REG_TCRIT1(x) ((x) + 0x40) |
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#define LM95234_REG_TCRIT2(x) ((x) + 0x49) /* Remote channel 1,2 */ |
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#define LM95234_REG_TCRIT_HYST 0x5a |
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|
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#define NATSEMI_MAN_ID 0x01 |
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#define LM95233_CHIP_ID 0x89 |
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#define LM95234_CHIP_ID 0x79 |
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|
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/* Client data (each client gets its own) */ |
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struct lm95234_data { |
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struct i2c_client *client; |
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const struct attribute_group *groups[3]; |
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struct mutex update_lock; |
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unsigned long last_updated, interval; /* in jiffies */ |
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bool valid; /* false until following fields are valid */ |
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/* registers values */ |
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int temp[5]; /* temperature (signed) */ |
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u32 status; /* fault/alarm status */ |
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u8 tcrit1[5]; /* critical temperature limit */ |
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u8 tcrit2[2]; /* high temperature limit */ |
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s8 toffset[4]; /* remote temperature offset */ |
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u8 thyst; /* common hysteresis */ |
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|
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u8 sensor_type; /* temperature sensor type */ |
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}; |
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static int lm95234_read_temp(struct i2c_client *client, int index, int *t) |
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{ |
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int val; |
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u16 temp = 0; |
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|
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if (index) { |
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val = i2c_smbus_read_byte_data(client, |
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LM95234_REG_UTEMPH(index - 1)); |
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if (val < 0) |
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return val; |
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temp = val << 8; |
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val = i2c_smbus_read_byte_data(client, |
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LM95234_REG_UTEMPL(index - 1)); |
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if (val < 0) |
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return val; |
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temp |= val; |
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*t = temp; |
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} |
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/* |
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* Read signed temperature if unsigned temperature is 0, |
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* or if this is the local sensor. |
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*/ |
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if (!temp) { |
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val = i2c_smbus_read_byte_data(client, |
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LM95234_REG_TEMPH(index)); |
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if (val < 0) |
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return val; |
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temp = val << 8; |
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val = i2c_smbus_read_byte_data(client, |
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LM95234_REG_TEMPL(index)); |
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if (val < 0) |
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return val; |
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temp |= val; |
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*t = (s16)temp; |
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} |
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return 0; |
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} |
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static u16 update_intervals[] = { 143, 364, 1000, 2500 }; |
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|
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/* Fill value cache. Must be called with update lock held. */ |
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|
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static int lm95234_fill_cache(struct lm95234_data *data, |
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struct i2c_client *client) |
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{ |
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int i, ret; |
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ret = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); |
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if (ret < 0) |
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return ret; |
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data->interval = msecs_to_jiffies(update_intervals[ret & 0x03]); |
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for (i = 0; i < ARRAY_SIZE(data->tcrit1); i++) { |
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ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT1(i)); |
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if (ret < 0) |
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return ret; |
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data->tcrit1[i] = ret; |
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} |
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for (i = 0; i < ARRAY_SIZE(data->tcrit2); i++) { |
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ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT2(i)); |
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if (ret < 0) |
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return ret; |
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data->tcrit2[i] = ret; |
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} |
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for (i = 0; i < ARRAY_SIZE(data->toffset); i++) { |
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ret = i2c_smbus_read_byte_data(client, LM95234_REG_OFFSET(i)); |
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if (ret < 0) |
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return ret; |
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data->toffset[i] = ret; |
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} |
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ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT_HYST); |
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if (ret < 0) |
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return ret; |
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data->thyst = ret; |
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ret = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); |
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if (ret < 0) |
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return ret; |
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data->sensor_type = ret; |
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return 0; |
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} |
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static int lm95234_update_device(struct lm95234_data *data) |
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{ |
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struct i2c_client *client = data->client; |
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int ret; |
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mutex_lock(&data->update_lock); |
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if (time_after(jiffies, data->last_updated + data->interval) || |
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!data->valid) { |
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int i; |
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if (!data->valid) { |
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ret = lm95234_fill_cache(data, client); |
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if (ret < 0) |
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goto abort; |
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} |
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data->valid = false; |
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for (i = 0; i < ARRAY_SIZE(data->temp); i++) { |
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ret = lm95234_read_temp(client, i, &data->temp[i]); |
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if (ret < 0) |
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goto abort; |
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} |
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ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_FAULT); |
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if (ret < 0) |
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goto abort; |
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data->status = ret; |
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ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT1); |
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if (ret < 0) |
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goto abort; |
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data->status |= ret << 8; |
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ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT2); |
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if (ret < 0) |
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goto abort; |
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data->status |= ret << 16; |
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data->last_updated = jiffies; |
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data->valid = true; |
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} |
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ret = 0; |
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abort: |
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mutex_unlock(&data->update_lock); |
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return ret; |
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} |
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static ssize_t temp_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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if (ret) |
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return ret; |
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return sprintf(buf, "%d\n", |
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DIV_ROUND_CLOSEST(data->temp[index] * 125, 32)); |
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} |
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static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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u32 mask = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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if (ret) |
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return ret; |
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return sprintf(buf, "%u", !!(data->status & mask)); |
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} |
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static ssize_t type_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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u8 mask = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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if (ret) |
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return ret; |
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return sprintf(buf, data->sensor_type & mask ? "1\n" : "2\n"); |
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} |
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static ssize_t type_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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unsigned long val; |
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u8 mask = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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if (ret) |
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return ret; |
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ret = kstrtoul(buf, 10, &val); |
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if (ret < 0) |
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return ret; |
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if (val != 1 && val != 2) |
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return -EINVAL; |
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mutex_lock(&data->update_lock); |
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if (val == 1) |
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data->sensor_type |= mask; |
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else |
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data->sensor_type &= ~mask; |
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data->valid = false; |
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i2c_smbus_write_byte_data(data->client, LM95234_REG_REM_MODEL, |
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data->sensor_type); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t tcrit2_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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if (ret) |
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return ret; |
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return sprintf(buf, "%u", data->tcrit2[index] * 1000); |
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} |
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static ssize_t tcrit2_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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long val; |
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int ret = lm95234_update_device(data); |
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if (ret) |
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return ret; |
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ret = kstrtol(buf, 10, &val); |
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if (ret < 0) |
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return ret; |
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val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, index ? 255 : 127); |
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mutex_lock(&data->update_lock); |
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data->tcrit2[index] = val; |
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i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT2(index), val); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t tcrit2_hyst_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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if (ret) |
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return ret; |
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/* Result can be negative, so be careful with unsigned operands */ |
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return sprintf(buf, "%d", |
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((int)data->tcrit2[index] - (int)data->thyst) * 1000); |
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} |
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static ssize_t tcrit1_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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return sprintf(buf, "%u", data->tcrit1[index] * 1000); |
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} |
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static ssize_t tcrit1_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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long val; |
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if (ret) |
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return ret; |
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ret = kstrtol(buf, 10, &val); |
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if (ret < 0) |
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return ret; |
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val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 255); |
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mutex_lock(&data->update_lock); |
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data->tcrit1[index] = val; |
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i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT1(index), val); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t tcrit1_hyst_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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if (ret) |
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return ret; |
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|
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/* Result can be negative, so be careful with unsigned operands */ |
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return sprintf(buf, "%d", |
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((int)data->tcrit1[index] - (int)data->thyst) * 1000); |
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} |
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static ssize_t tcrit1_hyst_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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long val; |
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if (ret) |
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return ret; |
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ret = kstrtol(buf, 10, &val); |
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if (ret < 0) |
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return ret; |
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val = DIV_ROUND_CLOSEST(val, 1000); |
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val = clamp_val((int)data->tcrit1[index] - val, 0, 31); |
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mutex_lock(&data->update_lock); |
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data->thyst = val; |
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i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT_HYST, val); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t offset_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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if (ret) |
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return ret; |
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return sprintf(buf, "%d", data->toffset[index] * 500); |
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} |
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static ssize_t offset_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int index = to_sensor_dev_attr(attr)->index; |
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int ret = lm95234_update_device(data); |
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long val; |
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if (ret) |
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return ret; |
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ret = kstrtol(buf, 10, &val); |
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if (ret < 0) |
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return ret; |
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|
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/* Accuracy is 1/2 degrees C */ |
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val = clamp_val(DIV_ROUND_CLOSEST(val, 500), -128, 127); |
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mutex_lock(&data->update_lock); |
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data->toffset[index] = val; |
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i2c_smbus_write_byte_data(data->client, LM95234_REG_OFFSET(index), val); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t update_interval_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int ret = lm95234_update_device(data); |
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|
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if (ret) |
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return ret; |
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|
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return sprintf(buf, "%lu\n", |
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DIV_ROUND_CLOSEST(data->interval * 1000, HZ)); |
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} |
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|
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static ssize_t update_interval_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct lm95234_data *data = dev_get_drvdata(dev); |
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int ret = lm95234_update_device(data); |
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unsigned long val; |
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u8 regval; |
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|
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if (ret) |
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return ret; |
|
|
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ret = kstrtoul(buf, 10, &val); |
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if (ret < 0) |
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return ret; |
|
|
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for (regval = 0; regval < 3; regval++) { |
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if (val <= update_intervals[regval]) |
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break; |
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} |
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|
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mutex_lock(&data->update_lock); |
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data->interval = msecs_to_jiffies(update_intervals[regval]); |
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i2c_smbus_write_byte_data(data->client, LM95234_REG_CONVRATE, regval); |
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mutex_unlock(&data->update_lock); |
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|
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return count; |
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} |
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|
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static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); |
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static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); |
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static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); |
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static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); |
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static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); |
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|
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static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, BIT(0) | BIT(1)); |
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static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, BIT(2) | BIT(3)); |
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static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, BIT(4) | BIT(5)); |
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static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, BIT(6) | BIT(7)); |
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|
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static SENSOR_DEVICE_ATTR_RW(temp2_type, type, BIT(1)); |
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static SENSOR_DEVICE_ATTR_RW(temp3_type, type, BIT(2)); |
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static SENSOR_DEVICE_ATTR_RW(temp4_type, type, BIT(3)); |
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static SENSOR_DEVICE_ATTR_RW(temp5_type, type, BIT(4)); |
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|
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static SENSOR_DEVICE_ATTR_RW(temp1_max, tcrit1, 0); |
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static SENSOR_DEVICE_ATTR_RW(temp2_max, tcrit2, 0); |
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static SENSOR_DEVICE_ATTR_RW(temp3_max, tcrit2, 1); |
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static SENSOR_DEVICE_ATTR_RW(temp4_max, tcrit1, 3); |
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static SENSOR_DEVICE_ATTR_RW(temp5_max, tcrit1, 4); |
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|
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static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, tcrit1_hyst, 0); |
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static SENSOR_DEVICE_ATTR_RO(temp2_max_hyst, tcrit2_hyst, 0); |
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static SENSOR_DEVICE_ATTR_RO(temp3_max_hyst, tcrit2_hyst, 1); |
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static SENSOR_DEVICE_ATTR_RO(temp4_max_hyst, tcrit1_hyst, 3); |
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static SENSOR_DEVICE_ATTR_RO(temp5_max_hyst, tcrit1_hyst, 4); |
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|
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static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, BIT(0 + 8)); |
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static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, BIT(1 + 16)); |
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static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, BIT(2 + 16)); |
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static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, BIT(3 + 8)); |
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static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, BIT(4 + 8)); |
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|
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static SENSOR_DEVICE_ATTR_RW(temp2_crit, tcrit1, 1); |
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static SENSOR_DEVICE_ATTR_RW(temp3_crit, tcrit1, 2); |
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|
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static SENSOR_DEVICE_ATTR_RO(temp2_crit_hyst, tcrit1_hyst, 1); |
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static SENSOR_DEVICE_ATTR_RO(temp3_crit_hyst, tcrit1_hyst, 2); |
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|
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static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, BIT(1 + 8)); |
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static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, BIT(2 + 8)); |
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|
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static SENSOR_DEVICE_ATTR_RW(temp2_offset, offset, 0); |
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static SENSOR_DEVICE_ATTR_RW(temp3_offset, offset, 1); |
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static SENSOR_DEVICE_ATTR_RW(temp4_offset, offset, 2); |
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static SENSOR_DEVICE_ATTR_RW(temp5_offset, offset, 3); |
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|
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static DEVICE_ATTR_RW(update_interval); |
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|
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static struct attribute *lm95234_common_attrs[] = { |
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&sensor_dev_attr_temp1_input.dev_attr.attr, |
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&sensor_dev_attr_temp2_input.dev_attr.attr, |
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&sensor_dev_attr_temp3_input.dev_attr.attr, |
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&sensor_dev_attr_temp2_fault.dev_attr.attr, |
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&sensor_dev_attr_temp3_fault.dev_attr.attr, |
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&sensor_dev_attr_temp2_type.dev_attr.attr, |
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&sensor_dev_attr_temp3_type.dev_attr.attr, |
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&sensor_dev_attr_temp1_max.dev_attr.attr, |
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&sensor_dev_attr_temp2_max.dev_attr.attr, |
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&sensor_dev_attr_temp3_max.dev_attr.attr, |
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&sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
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&sensor_dev_attr_temp2_max_hyst.dev_attr.attr, |
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&sensor_dev_attr_temp3_max_hyst.dev_attr.attr, |
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&sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
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&sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
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&sensor_dev_attr_temp3_max_alarm.dev_attr.attr, |
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&sensor_dev_attr_temp2_crit.dev_attr.attr, |
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&sensor_dev_attr_temp3_crit.dev_attr.attr, |
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&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, |
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&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, |
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&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, |
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&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, |
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&sensor_dev_attr_temp2_offset.dev_attr.attr, |
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&sensor_dev_attr_temp3_offset.dev_attr.attr, |
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&dev_attr_update_interval.attr, |
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NULL |
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}; |
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|
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static const struct attribute_group lm95234_common_group = { |
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.attrs = lm95234_common_attrs, |
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}; |
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|
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static struct attribute *lm95234_attrs[] = { |
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&sensor_dev_attr_temp4_input.dev_attr.attr, |
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&sensor_dev_attr_temp5_input.dev_attr.attr, |
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&sensor_dev_attr_temp4_fault.dev_attr.attr, |
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&sensor_dev_attr_temp5_fault.dev_attr.attr, |
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&sensor_dev_attr_temp4_type.dev_attr.attr, |
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&sensor_dev_attr_temp5_type.dev_attr.attr, |
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&sensor_dev_attr_temp4_max.dev_attr.attr, |
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&sensor_dev_attr_temp5_max.dev_attr.attr, |
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&sensor_dev_attr_temp4_max_hyst.dev_attr.attr, |
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&sensor_dev_attr_temp5_max_hyst.dev_attr.attr, |
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&sensor_dev_attr_temp4_max_alarm.dev_attr.attr, |
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&sensor_dev_attr_temp5_max_alarm.dev_attr.attr, |
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&sensor_dev_attr_temp4_offset.dev_attr.attr, |
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&sensor_dev_attr_temp5_offset.dev_attr.attr, |
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NULL |
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}; |
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|
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static const struct attribute_group lm95234_group = { |
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.attrs = lm95234_attrs, |
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}; |
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|
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static int lm95234_detect(struct i2c_client *client, |
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struct i2c_board_info *info) |
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{ |
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struct i2c_adapter *adapter = client->adapter; |
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int address = client->addr; |
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u8 config_mask, model_mask; |
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int mfg_id, chip_id, val; |
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const char *name; |
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|
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
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return -ENODEV; |
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|
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mfg_id = i2c_smbus_read_byte_data(client, LM95234_REG_MAN_ID); |
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if (mfg_id != NATSEMI_MAN_ID) |
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return -ENODEV; |
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|
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chip_id = i2c_smbus_read_byte_data(client, LM95234_REG_CHIP_ID); |
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switch (chip_id) { |
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case LM95233_CHIP_ID: |
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if (address != 0x18 && address != 0x2a && address != 0x2b) |
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return -ENODEV; |
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config_mask = 0xbf; |
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model_mask = 0xf9; |
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name = "lm95233"; |
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break; |
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case LM95234_CHIP_ID: |
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if (address != 0x18 && address != 0x4d && address != 0x4e) |
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return -ENODEV; |
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config_mask = 0xbc; |
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model_mask = 0xe1; |
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name = "lm95234"; |
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break; |
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default: |
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return -ENODEV; |
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} |
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|
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val = i2c_smbus_read_byte_data(client, LM95234_REG_STATUS); |
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if (val & 0x30) |
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return -ENODEV; |
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|
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val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); |
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if (val & config_mask) |
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return -ENODEV; |
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|
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val = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); |
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if (val & 0xfc) |
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return -ENODEV; |
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|
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val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); |
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if (val & model_mask) |
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return -ENODEV; |
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|
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val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); |
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if (val & model_mask) |
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return -ENODEV; |
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|
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strlcpy(info->type, name, I2C_NAME_SIZE); |
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return 0; |
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} |
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|
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static int lm95234_init_client(struct i2c_client *client) |
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{ |
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int val, model; |
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|
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/* start conversion if necessary */ |
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val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); |
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if (val < 0) |
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return val; |
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if (val & 0x40) |
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i2c_smbus_write_byte_data(client, LM95234_REG_CONFIG, |
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val & ~0x40); |
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|
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/* If diode type status reports an error, try to fix it */ |
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val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); |
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if (val < 0) |
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return val; |
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model = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); |
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if (model < 0) |
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return model; |
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if (model & val) { |
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dev_notice(&client->dev, |
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"Fixing remote diode type misconfiguration (0x%x)\n", |
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val); |
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i2c_smbus_write_byte_data(client, LM95234_REG_REM_MODEL, |
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model & ~val); |
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} |
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return 0; |
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} |
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|
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static const struct i2c_device_id lm95234_id[]; |
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|
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static int lm95234_probe(struct i2c_client *client) |
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{ |
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struct device *dev = &client->dev; |
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struct lm95234_data *data; |
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struct device *hwmon_dev; |
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int err; |
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|
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data = devm_kzalloc(dev, sizeof(struct lm95234_data), GFP_KERNEL); |
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if (!data) |
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return -ENOMEM; |
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|
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data->client = client; |
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mutex_init(&data->update_lock); |
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|
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/* Initialize the LM95234 chip */ |
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err = lm95234_init_client(client); |
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if (err < 0) |
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return err; |
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|
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data->groups[0] = &lm95234_common_group; |
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if (i2c_match_id(lm95234_id, client)->driver_data == lm95234) |
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data->groups[1] = &lm95234_group; |
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|
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hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
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data, data->groups); |
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return PTR_ERR_OR_ZERO(hwmon_dev); |
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} |
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|
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/* Driver data (common to all clients) */ |
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static const struct i2c_device_id lm95234_id[] = { |
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{ "lm95233", lm95233 }, |
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{ "lm95234", lm95234 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, lm95234_id); |
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|
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static struct i2c_driver lm95234_driver = { |
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.class = I2C_CLASS_HWMON, |
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.driver = { |
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.name = DRVNAME, |
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}, |
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.probe_new = lm95234_probe, |
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.id_table = lm95234_id, |
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.detect = lm95234_detect, |
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.address_list = normal_i2c, |
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}; |
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|
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module_i2c_driver(lm95234_driver); |
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|
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MODULE_AUTHOR("Guenter Roeck <[email protected]>"); |
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MODULE_DESCRIPTION("LM95233/LM95234 sensor driver"); |
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MODULE_LICENSE("GPL");
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|
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