// SPDX-License-Identifier: GPL-2.0-only /* * max8973-regulator.c -- Maxim max8973A * * Regulator driver for MAXIM 8973A DC-DC step-down switching regulator. * * Copyright (c) 2012, NVIDIA Corporation. * * Author: Laxman Dewangan <[email protected]> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/max8973-regulator.h> #include <linux/regulator/of_regulator.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/regmap.h> #include <linux/thermal.h> #include <linux/irq.h> #include <linux/interrupt.h> /* Register definitions */ #define MAX8973_VOUT … #define MAX8973_VOUT_DVS … #define MAX8973_CONTROL1 … #define MAX8973_CONTROL2 … #define MAX8973_CHIPID1 … #define MAX8973_CHIPID2 … #define MAX8973_MAX_VOUT_REG … /* MAX8973_VOUT */ #define MAX8973_VOUT_ENABLE … #define MAX8973_VOUT_MASK … /* MAX8973_VOUT_DVS */ #define MAX8973_DVS_VOUT_MASK … /* MAX8973_CONTROL1 */ #define MAX8973_SNS_ENABLE … #define MAX8973_FPWM_EN_M … #define MAX8973_NFSR_ENABLE … #define MAX8973_AD_ENABLE … #define MAX8973_BIAS_ENABLE … #define MAX8973_FREQSHIFT_9PER … #define MAX8973_RAMP_12mV_PER_US … #define MAX8973_RAMP_25mV_PER_US … #define MAX8973_RAMP_50mV_PER_US … #define MAX8973_RAMP_200mV_PER_US … #define MAX8973_RAMP_MASK … /* MAX8973_CONTROL2 */ #define MAX8973_WDTMR_ENABLE … #define MAX8973_DISCH_ENBABLE … #define MAX8973_FT_ENABLE … #define MAX77621_T_JUNCTION_120 … #define MAX8973_CKKADV_TRIP_MASK … #define MAX8973_CKKADV_TRIP_DISABLE … #define MAX8973_CKKADV_TRIP_75mV_PER_US … #define MAX8973_CKKADV_TRIP_150mV_PER_US … #define MAX8973_CKKADV_TRIP_75mV_PER_US_HIST_DIS … #define MAX8973_CONTROL_CLKADV_TRIP_MASK … #define MAX8973_INDUCTOR_MIN_30_PER … #define MAX8973_INDUCTOR_NOMINAL … #define MAX8973_INDUCTOR_PLUS_30_PER … #define MAX8973_INDUCTOR_PLUS_60_PER … #define MAX8973_CONTROL_INDUCTOR_VALUE_MASK … #define MAX8973_MIN_VOLATGE … #define MAX8973_MAX_VOLATGE … #define MAX8973_VOLATGE_STEP … #define MAX8973_BUCK_N_VOLTAGE … #define MAX77621_CHIPID_TJINT_S … #define MAX77621_NORMAL_OPERATING_TEMP … #define MAX77621_TJINT_WARNING_TEMP_120 … #define MAX77621_TJINT_WARNING_TEMP_140 … enum device_id { … }; /* Maxim 8973 chip information */ struct max8973_chip { … }; /* * find_voltage_set_register: Find new voltage configuration register (VOUT). * The finding of the new VOUT register will be based on the LRU mechanism. * Each VOUT register will have different voltage configured . This * Function will look if any of the VOUT register have requested voltage set * or not. * - If it is already there then it will make that register as most * recently used and return as found so that caller need not to set * the VOUT register but need to set the proper gpios to select this * VOUT register. * - If requested voltage is not found then it will use the least * recently mechanism to get new VOUT register for new configuration * and will return not_found so that caller need to set new VOUT * register and then gpios (both). */ static bool find_voltage_set_register(struct max8973_chip *tps, int req_vsel, int *vout_reg, int *gpio_val) { … } static int max8973_dcdc_get_voltage_sel(struct regulator_dev *rdev) { … } static int max8973_dcdc_set_voltage_sel(struct regulator_dev *rdev, unsigned vsel) { … } static int max8973_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) { … } static unsigned int max8973_dcdc_get_mode(struct regulator_dev *rdev) { … } static int max8973_set_current_limit(struct regulator_dev *rdev, int min_ua, int max_ua) { … } static int max8973_get_current_limit(struct regulator_dev *rdev) { … } static const unsigned int max8973_buck_ramp_table[] = …; static const struct regulator_ops max8973_dcdc_ops = …; static int max8973_init_dcdc(struct max8973_chip *max, struct max8973_regulator_platform_data *pdata) { … } static int max8973_thermal_read_temp(struct thermal_zone_device *tz, int *temp) { … } static irqreturn_t max8973_thermal_irq(int irq, void *data) { … } static const struct thermal_zone_device_ops max77621_tz_ops = …; static int max8973_thermal_init(struct max8973_chip *mchip) { … } static const struct regmap_config max8973_regmap_config = …; static struct max8973_regulator_platform_data *max8973_parse_dt( struct device *dev) { … } static const struct of_device_id of_max8973_match_tbl[] = …; MODULE_DEVICE_TABLE(of, of_max8973_match_tbl); static int max8973_probe(struct i2c_client *client) { … } static const struct i2c_device_id max8973_id[] = …; MODULE_DEVICE_TABLE(i2c, max8973_id); static struct i2c_driver max8973_i2c_driver = …; static int __init max8973_init(void) { … } subsys_initcall(max8973_init); static void __exit max8973_cleanup(void) { … } module_exit(max8973_cleanup); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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