// SPDX-License-Identifier: GPL-2.0-or-later /* * jc42.c - driver for Jedec JC42.4 compliant temperature sensors * * Copyright (c) 2010 Ericsson AB. * * Derived from lm77.c by Andras BALI <[email protected]>. * * JC42.4 compliant temperature sensors are typically used on memory modules. */ #include <linux/bitops.h> #include <linux/bitfield.h> #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/regmap.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = …; /* JC42 registers. All registers are 16 bit. */ #define JC42_REG_CAP … #define JC42_REG_CONFIG … #define JC42_REG_TEMP_UPPER … #define JC42_REG_TEMP_LOWER … #define JC42_REG_TEMP_CRITICAL … #define JC42_REG_TEMP … #define JC42_REG_MANID … #define JC42_REG_DEVICEID … #define JC42_REG_SMBUS … /* Status bits in temperature register */ #define JC42_ALARM_CRIT … #define JC42_ALARM_MAX … #define JC42_ALARM_MIN … /* Configuration register defines */ #define JC42_CFG_CRIT_ONLY … #define JC42_CFG_TCRIT_LOCK … #define JC42_CFG_EVENT_LOCK … #define JC42_CFG_SHUTDOWN … #define JC42_CFG_HYST_MASK … /* Capabilities */ #define JC42_CAP_RANGE … /* Manufacturer IDs */ #define ADT_MANID … #define ATMEL_MANID … #define ATMEL_MANID2 … #define MAX_MANID … #define IDT_MANID … #define MCP_MANID … #define NXP_MANID … #define ONS_MANID … #define STM_MANID … #define GT_MANID … #define GT_MANID2 … #define SI_MANID … /* SMBUS register */ #define SMBUS_STMOUT … /* Supported chips */ /* Analog Devices */ #define ADT7408_DEVID … #define ADT7408_DEVID_MASK … /* Atmel */ #define AT30TS00_DEVID … #define AT30TS00_DEVID_MASK … #define GT34TS02_DEVID … #define GT34TS02_DEVID_MASK … #define TS3000_DEVID … #define TS3000_DEVID_MASK … #define TS3001_DEVID … #define TS3001_DEVID_MASK … /* Maxim */ #define MAX6604_DEVID … #define MAX6604_DEVID_MASK … /* Microchip */ #define MCP9804_DEVID … #define MCP9804_DEVID_MASK … #define MCP9808_DEVID … #define MCP9808_DEVID_MASK … #define MCP98242_DEVID … #define MCP98242_DEVID_MASK … #define MCP98243_DEVID … #define MCP98243_DEVID_MASK … #define MCP9843_DEVID … #define MCP9843_DEVID_MASK … /* NXP */ #define SE97_DEVID … #define SE97_DEVID_MASK … #define SE98_DEVID … #define SE98_DEVID_MASK … /* ON Semiconductor */ #define CAT6095_DEVID … #define CAT6095_DEVID_MASK … #define CAT34TS02C_DEVID … #define CAT34TS02C_DEVID_MASK … /* ST Microelectronics */ #define STTS424_DEVID … #define STTS424_DEVID_MASK … #define STTS424E_DEVID … #define STTS424E_DEVID_MASK … #define STTS2002_DEVID … #define STTS2002_DEVID_MASK … #define STTS3000_DEVID … #define STTS3000_DEVID_MASK … /* TSE2004 compliant sensors */ #define TSE2004_DEVID … #define TSE2004_DEVID_MASK … static u16 jc42_hysteresis[] = …; struct jc42_chips { … }; static struct jc42_chips jc42_chips[] = …; /* Each client has this additional data */ struct jc42_data { … }; #define JC42_TEMP_MIN_EXTENDED … #define JC42_TEMP_MIN … #define JC42_TEMP_MAX … static u16 jc42_temp_to_reg(long temp, bool extended) { … } static int jc42_temp_from_reg(s16 reg) { … } static int jc42_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int jc42_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static umode_t jc42_is_visible(const void *_data, enum hwmon_sensor_types type, u32 attr, int channel) { … } /* Return 0 if detection is successful, -ENODEV otherwise */ static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static const struct hwmon_channel_info * const jc42_info[] = …; static const struct hwmon_ops jc42_hwmon_ops = …; static const struct hwmon_chip_info jc42_chip_info = …; static bool jc42_readable_reg(struct device *dev, unsigned int reg) { … } static bool jc42_writable_reg(struct device *dev, unsigned int reg) { … } static bool jc42_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config jc42_regmap_config = …; static int jc42_probe(struct i2c_client *client) { … } static void jc42_remove(struct i2c_client *client) { … } #ifdef CONFIG_PM static int jc42_suspend(struct device *dev) { … } static int jc42_resume(struct device *dev) { … } static const struct dev_pm_ops jc42_dev_pm_ops = …; #define JC42_DEV_PM_OPS … #else #define JC42_DEV_PM_OPS … #endif /* CONFIG_PM */ static const struct i2c_device_id jc42_id[] = …; MODULE_DEVICE_TABLE(i2c, jc42_id); #ifdef CONFIG_OF static const struct of_device_id jc42_of_ids[] = …; MODULE_DEVICE_TABLE(of, jc42_of_ids); #endif static struct i2c_driver jc42_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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