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111 lines
2.4 KiB
111 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* ADT7410/ADT7420 digital temperature sensor driver |
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* |
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* Copyright 2012-2013 Analog Devices Inc. |
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* Author: Lars-Peter Clausen <[email protected]> |
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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/i2c.h> |
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#include <linux/regmap.h> |
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#include "adt7x10.h" |
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static bool adt7410_regmap_is_volatile(struct device *dev, unsigned int reg) |
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{ |
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switch (reg) { |
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case ADT7X10_TEMPERATURE: |
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case ADT7X10_STATUS: |
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return true; |
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default: |
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return false; |
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} |
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} |
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static int adt7410_reg_read(void *context, unsigned int reg, unsigned int *val) |
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{ |
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struct i2c_client *client = context; |
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int regval; |
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switch (reg) { |
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case ADT7X10_TEMPERATURE: |
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case ADT7X10_T_ALARM_HIGH: |
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case ADT7X10_T_ALARM_LOW: |
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case ADT7X10_T_CRIT: |
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regval = i2c_smbus_read_word_swapped(client, reg); |
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break; |
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default: |
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regval = i2c_smbus_read_byte_data(client, reg); |
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break; |
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} |
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if (regval < 0) |
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return regval; |
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*val = regval; |
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return 0; |
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} |
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static int adt7410_reg_write(void *context, unsigned int reg, unsigned int val) |
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{ |
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struct i2c_client *client = context; |
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int ret; |
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switch (reg) { |
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case ADT7X10_TEMPERATURE: |
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case ADT7X10_T_ALARM_HIGH: |
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case ADT7X10_T_ALARM_LOW: |
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case ADT7X10_T_CRIT: |
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ret = i2c_smbus_write_word_swapped(client, reg, val); |
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break; |
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default: |
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ret = i2c_smbus_write_byte_data(client, reg, val); |
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break; |
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} |
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return ret; |
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} |
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static const struct regmap_config adt7410_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 16, |
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.max_register = ADT7X10_ID, |
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.cache_type = REGCACHE_RBTREE, |
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.volatile_reg = adt7410_regmap_is_volatile, |
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.reg_read = adt7410_reg_read, |
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.reg_write = adt7410_reg_write, |
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}; |
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static int adt7410_i2c_probe(struct i2c_client *client) |
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{ |
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struct regmap *regmap; |
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regmap = devm_regmap_init(&client->dev, NULL, client, |
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&adt7410_regmap_config); |
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if (IS_ERR(regmap)) |
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return PTR_ERR(regmap); |
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return adt7x10_probe(&client->dev, client->name, client->irq, regmap); |
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} |
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static const struct i2c_device_id adt7410_ids[] = { |
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{ "adt7410", 0 }, |
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{ "adt7420", 0 }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(i2c, adt7410_ids); |
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static struct i2c_driver adt7410_driver = { |
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.class = I2C_CLASS_HWMON, |
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.driver = { |
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.name = "adt7410", |
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.pm = ADT7X10_DEV_PM_OPS, |
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}, |
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.probe_new = adt7410_i2c_probe, |
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.id_table = adt7410_ids, |
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.address_list = I2C_ADDRS(0x48, 0x49, 0x4a, 0x4b), |
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}; |
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module_i2c_driver(adt7410_driver); |
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MODULE_AUTHOR("Lars-Peter Clausen <[email protected]>"); |
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MODULE_DESCRIPTION("ADT7410/AD7420 driver"); |
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MODULE_LICENSE("GPL");
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