// SPDX-License-Identifier: GPL-2.0-or-later /* * Hardware monitoring driver for LTC2978 and compatible chips. * * Copyright (c) 2011 Ericsson AB. * Copyright (c) 2013, 2014, 2015 Guenter Roeck * Copyright (c) 2015 Linear Technology * Copyright (c) 2018 Analog Devices Inc. */ #include <linux/delay.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/regulator/driver.h> #include "pmbus.h" enum chips { … }; /* Common for all chips */ #define LTC2978_MFR_VOUT_PEAK … #define LTC2978_MFR_VIN_PEAK … #define LTC2978_MFR_TEMPERATURE_PEAK … #define LTC2978_MFR_SPECIAL_ID … #define LTC2978_MFR_COMMON … /* LTC2974, LTC2975, LCT2977, LTC2980, LTC2978, and LTM2987 */ #define LTC2978_MFR_VOUT_MIN … #define LTC2978_MFR_VIN_MIN … #define LTC2978_MFR_TEMPERATURE_MIN … /* LTC2974, LTC2975 */ #define LTC2974_MFR_IOUT_PEAK … #define LTC2974_MFR_IOUT_MIN … /* LTC3880, LTC3882, LTC3883, LTC3887, LTM4675, LTM4676, LTC7132 */ #define LTC3880_MFR_IOUT_PEAK … #define LTC3880_MFR_CLEAR_PEAKS … #define LTC3880_MFR_TEMPERATURE2_PEAK … /* LTC3883, LTC3884, LTC3886, LTC3889, LTC7132, LTC7880 */ #define LTC3883_MFR_IIN_PEAK … /* LTC2975 only */ #define LTC2975_MFR_IIN_PEAK … #define LTC2975_MFR_IIN_MIN … #define LTC2975_MFR_PIN_PEAK … #define LTC2975_MFR_PIN_MIN … #define LTC2978_ID_MASK … #define LTC2972_ID … #define LTC2974_ID … #define LTC2975_ID … #define LTC2977_ID … #define LTC2978_ID_REV1 … #define LTC2978_ID_REV2 … #define LTC2979_ID_A … #define LTC2979_ID_B … #define LTC2980_ID_A … #define LTC2980_ID_B … #define LTC3880_ID … #define LTC3882_ID … #define LTC3882_ID_D1 … #define LTC3883_ID … #define LTC3884_ID … #define LTC3886_ID … #define LTC3887_ID … #define LTC3889_ID … #define LTC7132_ID … #define LTC7880_ID … #define LTM2987_ID_A … #define LTM2987_ID_B … #define LTM4664_ID … #define LTM4675_ID … #define LTM4676_ID_REV1 … #define LTM4676_ID_REV2 … #define LTM4676A_ID … #define LTM4677_ID_REV1 … #define LTM4677_ID_REV2 … #define LTM4678_ID_REV1 … #define LTM4678_ID_REV2 … #define LTM4680_ID … #define LTM4686_ID … #define LTM4700_ID … #define LTC2972_NUM_PAGES … #define LTC2974_NUM_PAGES … #define LTC2978_NUM_PAGES … #define LTC3880_NUM_PAGES … #define LTC3883_NUM_PAGES … #define LTC_POLL_TIMEOUT … #define LTC_NOT_BUSY … #define LTC_NOT_PENDING … /* * LTC2978 clears peak data whenever the CLEAR_FAULTS command is executed, which * happens pretty much each time chip data is updated. Raw peak data therefore * does not provide much value. To be able to provide useful peak data, keep an * internal cache of measured peak data, which is only cleared if an explicit * "clear peak" command is executed for the sensor in question. */ struct ltc2978_data { … }; #define to_ltc2978_data(x) … #define FEAT_CLEAR_PEAKS … #define FEAT_NEEDS_POLLING … #define has_clear_peaks(d) … #define needs_polling(d) … static int ltc_wait_ready(struct i2c_client *client) { … } static int ltc_read_word_data(struct i2c_client *client, int page, int phase, int reg) { … } static int ltc_read_byte_data(struct i2c_client *client, int page, int reg) { … } static int ltc_write_byte_data(struct i2c_client *client, int page, int reg, u8 value) { … } static int ltc_write_byte(struct i2c_client *client, int page, u8 byte) { … } static inline int lin11_to_val(int data) { … } static int ltc_get_max(struct ltc2978_data *data, struct i2c_client *client, int page, int reg, u16 *pmax) { … } static int ltc_get_min(struct ltc2978_data *data, struct i2c_client *client, int page, int reg, u16 *pmin) { … } static int ltc2978_read_word_data_common(struct i2c_client *client, int page, int reg) { … } static int ltc2978_read_word_data(struct i2c_client *client, int page, int phase, int reg) { … } static int ltc2974_read_word_data(struct i2c_client *client, int page, int phase, int reg) { … } static int ltc2975_read_word_data(struct i2c_client *client, int page, int phase, int reg) { … } static int ltc3880_read_word_data(struct i2c_client *client, int page, int phase, int reg) { … } static int ltc3883_read_word_data(struct i2c_client *client, int page, int phase, int reg) { … } static int ltc2978_clear_peaks(struct ltc2978_data *data, struct i2c_client *client, int page) { … } static int ltc2978_write_word_data(struct i2c_client *client, int page, int reg, u16 word) { … } static const struct i2c_device_id ltc2978_id[] = …; MODULE_DEVICE_TABLE(i2c, ltc2978_id); #if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR) #define LTC2978_ADC_RES … #define LTC2978_N_ADC … #define LTC2978_MAX_UV … #define LTC2978_UV_STEP … #define LTC2978_N_VOLTAGES … static const struct regulator_desc ltc2978_reg_desc[] = …; static const struct regulator_desc ltc2978_reg_desc_default[] = …; #endif /* CONFIG_SENSORS_LTC2978_REGULATOR */ static int ltc2978_get_id(struct i2c_client *client) { … } static int ltc2978_probe(struct i2c_client *client) { … } #ifdef CONFIG_OF static const struct of_device_id ltc2978_of_match[] = …; MODULE_DEVICE_TABLE(of, ltc2978_of_match); #endif static struct i2c_driver ltc2978_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_IMPORT_NS(…);
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