// SPDX-License-Identifier: GPL-2.0-or-later /* * nct7904.c - driver for Nuvoton NCT7904D. * * Copyright (c) 2015 Kontron * Author: Vadim V. Vlasov <[email protected]> * * Copyright (c) 2019 Advantech * Author: Amy.Shih <[email protected]> * * Copyright (c) 2020 Advantech * Author: Yuechao Zhao <[email protected]> * * Supports the following chips: * * Chip #vin #fan #pwm #temp #dts chip ID * nct7904d 20 12 4 5 8 0xc5 */ #include <linux/module.h> #include <linux/device.h> #include <linux/init.h> #include <linux/i2c.h> #include <linux/mutex.h> #include <linux/hwmon.h> #include <linux/watchdog.h> #define VENDOR_ID_REG … #define NUVOTON_ID … #define CHIP_ID_REG … #define NCT7904_ID … #define DEVICE_ID_REG … #define BANK_SEL_REG … #define BANK_0 … #define BANK_1 … #define BANK_2 … #define BANK_3 … #define BANK_4 … #define BANK_MAX … #define FANIN_MAX … #define VSEN_MAX … #define FANCTL_MAX … #define TCPU_MAX … #define TEMP_MAX … #define SMI_STS_MAX … #define VT_ADC_CTRL0_REG … #define VT_ADC_CTRL1_REG … #define VT_ADC_CTRL2_REG … #define FANIN_CTRL0_REG … #define FANIN_CTRL1_REG … #define DTS_T_CTRL0_REG … #define DTS_T_CTRL1_REG … #define VT_ADC_MD_REG … #define VSEN1_HV_LL_REG … #define VSEN1_LV_LL_REG … #define VSEN1_HV_HL_REG … #define VSEN1_LV_HL_REG … #define SMI_STS1_REG … #define SMI_STS3_REG … #define SMI_STS5_REG … #define SMI_STS7_REG … #define SMI_STS8_REG … #define VSEN1_HV_REG … #define TEMP_CH1_HV_REG … #define LTD_HV_REG … #define LTD_HV_HL_REG … #define LTD_LV_HL_REG … #define LTD_HV_LL_REG … #define LTD_LV_LL_REG … #define TEMP_CH1_CH_REG … #define TEMP_CH1_W_REG … #define TEMP_CH1_WH_REG … #define TEMP_CH1_C_REG … #define DTS_T_CPU1_C_REG … #define DTS_T_CPU1_CH_REG … #define DTS_T_CPU1_W_REG … #define DTS_T_CPU1_WH_REG … #define FANIN1_HV_REG … #define FANIN1_HV_HL_REG … #define FANIN1_LV_HL_REG … #define T_CPU1_HV_REG … #define PRTS_REG … #define PFE_REG … #define TSI_CTRL_REG … #define FANCTL1_FMR_REG … #define FANCTL1_OUT_REG … #define WDT_LOCK_REG … #define WDT_EN_REG … #define WDT_STS_REG … #define WDT_TIMER_REG … #define WDT_SOFT_EN … #define WDT_SOFT_DIS … #define VOLT_MONITOR_MODE … #define THERMAL_DIODE_MODE … #define THERMISTOR_MODE … #define ENABLE_TSI … #define WATCHDOG_TIMEOUT … /*The timeout range is 1-255 minutes*/ #define MIN_TIMEOUT … #define MAX_TIMEOUT … static int timeout; module_param(timeout, int, 0); MODULE_PARM_DESC(…) …; static bool nowayout = … WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); MODULE_PARM_DESC(…) …; static const unsigned short normal_i2c[] = …; struct nct7904_data { … }; /* Access functions */ static int nct7904_bank_lock(struct nct7904_data *data, unsigned int bank) { … } static inline void nct7904_bank_release(struct nct7904_data *data) { … } /* Read 1-byte register. Returns unsigned reg or -ERRNO on error. */ static int nct7904_read_reg(struct nct7904_data *data, unsigned int bank, unsigned int reg) { … } /* * Read 2-byte register. Returns register in big-endian format or * -ERRNO on error. */ static int nct7904_read_reg16(struct nct7904_data *data, unsigned int bank, unsigned int reg) { … } /* Write 1-byte register. Returns 0 or -ERRNO on error. */ static int nct7904_write_reg(struct nct7904_data *data, unsigned int bank, unsigned int reg, u8 val) { … } static int nct7904_read_fan(struct device *dev, u32 attr, int channel, long *val) { … } static umode_t nct7904_fan_is_visible(const void *_data, u32 attr, int channel) { … } static u8 nct7904_chan_to_index[] = …; static int nct7904_read_in(struct device *dev, u32 attr, int channel, long *val) { … } static umode_t nct7904_in_is_visible(const void *_data, u32 attr, int channel) { … } static int nct7904_read_temp(struct device *dev, u32 attr, int channel, long *val) { … } static umode_t nct7904_temp_is_visible(const void *_data, u32 attr, int channel) { … } static int nct7904_read_pwm(struct device *dev, u32 attr, int channel, long *val) { … } static int nct7904_write_temp(struct device *dev, u32 attr, int channel, long val) { … } static int nct7904_write_fan(struct device *dev, u32 attr, int channel, long val) { … } static int nct7904_write_in(struct device *dev, u32 attr, int channel, long val) { … } static int nct7904_write_pwm(struct device *dev, u32 attr, int channel, long val) { … } static umode_t nct7904_pwm_is_visible(const void *_data, u32 attr, int channel) { … } static int nct7904_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int nct7904_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static umode_t nct7904_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { … } /* Return 0 if detection is successful, -ENODEV otherwise */ static int nct7904_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static const struct hwmon_channel_info * const nct7904_info[] = …; static const struct hwmon_ops nct7904_hwmon_ops = …; static const struct hwmon_chip_info nct7904_chip_info = …; /* * Watchdog Function */ static int nct7904_wdt_start(struct watchdog_device *wdt) { … } static int nct7904_wdt_stop(struct watchdog_device *wdt) { … } static int nct7904_wdt_set_timeout(struct watchdog_device *wdt, unsigned int timeout) { … } static int nct7904_wdt_ping(struct watchdog_device *wdt) { … } static unsigned int nct7904_wdt_get_timeleft(struct watchdog_device *wdt) { … } static const struct watchdog_info nct7904_wdt_info = …; static const struct watchdog_ops nct7904_wdt_ops = …; static int nct7904_probe(struct i2c_client *client) { … } static const struct i2c_device_id nct7904_id[] = …; MODULE_DEVICE_TABLE(i2c, nct7904_id); static struct i2c_driver nct7904_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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