// SPDX-License-Identifier: GPL-2.0-or-later /* * adm9240.c Part of lm_sensors, Linux kernel modules for hardware * monitoring * * Copyright (C) 1999 Frodo Looijaard <[email protected]> * Philip Edelbrock <[email protected]> * Copyright (C) 2003 Michiel Rook <[email protected]> * Copyright (C) 2005 Grant Coady <[email protected]> with valuable * guidance from Jean Delvare * * Driver supports Analog Devices ADM9240 * Dallas Semiconductor DS1780 * National Semiconductor LM81 * * ADM9240 is the reference, DS1780 and LM81 are register compatibles * * Voltage Six inputs are scaled by chip, VID also reported * Temperature Chip temperature to 0.5'C, maximum and max_hysteris * Fans 2 fans, low speed alarm, automatic fan clock divider * Alarms 16-bit map of active alarms * Analog Out 0..1250 mV output * * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm' * * Test hardware: Intel SE440BX-2 desktop motherboard --Grant * * LM81 extended temp reading not implemented */ #include <linux/bits.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/hwmon-sysfs.h> #include <linux/hwmon.h> #include <linux/hwmon-vid.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/regmap.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = …; enum chips { … }; /* ADM9240 registers */ #define ADM9240_REG_MAN_ID … #define ADM9240_REG_DIE_REV … #define ADM9240_REG_CONFIG … #define ADM9240_REG_IN(nr) … #define ADM9240_REG_IN_MAX(nr) … #define ADM9240_REG_IN_MIN(nr) … #define ADM9240_REG_FAN(nr) … #define ADM9240_REG_FAN_MIN(nr) … #define ADM9240_REG_INT(nr) … #define ADM9240_REG_INT_MASK(nr) … #define ADM9240_REG_TEMP … #define ADM9240_REG_TEMP_MAX(nr) … #define ADM9240_REG_ANALOG_OUT … #define ADM9240_REG_CHASSIS_CLEAR … #define ADM9240_REG_VID_FAN_DIV … #define ADM9240_REG_I2C_ADDR … #define ADM9240_REG_VID4 … #define ADM9240_REG_TEMP_CONF … /* generalised scaling with integer rounding */ static inline int SCALE(long val, int mul, int div) { … } /* adm9240 internally scales voltage measurements */ static const u16 nom_mv[] = …; static inline unsigned int IN_FROM_REG(u8 reg, int n) { … } static inline u8 IN_TO_REG(unsigned long val, int n) { … } /* temperature range: -40..125, 127 disables temperature alarm */ static inline s8 TEMP_TO_REG(long val) { … } /* two fans, each with low fan speed limit */ static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) { … } /* analog out 0..1250mV */ static inline u8 AOUT_TO_REG(unsigned long val) { … } static inline unsigned int AOUT_FROM_REG(u8 reg) { … } /* per client data */ struct adm9240_data { … }; /* write new fan div, callers must hold data->update_lock */ static int adm9240_write_fan_div(struct adm9240_data *data, int channel, u8 fan_div) { … } /* * set fan speed low limit: * * - value is zero: disable fan speed low limit alarm * * - value is below fan speed measurement range: enable fan speed low * limit alarm to be asserted while fan speed too slow to measure * * - otherwise: select fan clock divider to suit fan speed low limit, * measurement code may adjust registers to ensure fan speed reading */ static int adm9240_fan_min_write(struct adm9240_data *data, int channel, long val) { … } static ssize_t cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(cpu0_vid); static ssize_t aout_output_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t aout_output_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(aout_output); static struct attribute *adm9240_attrs[] = …; ATTRIBUTE_GROUPS(…); /*** sensor chip detect and driver install ***/ /* Return 0 if detection is successful, -ENODEV otherwise */ static int adm9240_detect(struct i2c_client *new_client, struct i2c_board_info *info) { … } static int adm9240_init_client(struct adm9240_data *data) { … } static int adm9240_chip_read(struct device *dev, u32 attr, long *val) { … } static int adm9240_intrusion_read(struct device *dev, u32 attr, long *val) { … } static int adm9240_intrusion_write(struct device *dev, u32 attr, long val) { … } static int adm9240_in_read(struct device *dev, u32 attr, int channel, long *val) { … } static int adm9240_in_write(struct device *dev, u32 attr, int channel, long val) { … } static int adm9240_fan_read(struct device *dev, u32 attr, int channel, long *val) { … } static int adm9240_fan_write(struct device *dev, u32 attr, int channel, long val) { … } static int adm9240_temp_read(struct device *dev, u32 attr, int channel, long *val) { … } static int adm9240_temp_write(struct device *dev, u32 attr, int channel, long val) { … } static int adm9240_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int adm9240_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static umode_t adm9240_is_visible(const void *_data, enum hwmon_sensor_types type, u32 attr, int channel) { … } static const struct hwmon_ops adm9240_hwmon_ops = …; static const struct hwmon_channel_info * const adm9240_info[] = …; static const struct hwmon_chip_info adm9240_chip_info = …; static bool adm9240_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config adm9240_regmap_config = …; static int adm9240_probe(struct i2c_client *client) { … } static const struct i2c_device_id adm9240_id[] = …; MODULE_DEVICE_TABLE(i2c, adm9240_id); static struct i2c_driver adm9240_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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