// SPDX-License-Identifier: GPL-2.0-only /* * Driver for * Maxim MAX16065/MAX16066 12-Channel/8-Channel, Flash-Configurable * System Managers with Nonvolatile Fault Registers * Maxim MAX16067/MAX16068 6-Channel, Flash-Configurable System Managers * with Nonvolatile Fault Registers * Maxim MAX16070/MAX16071 12-Channel/8-Channel, Flash-Configurable System * Monitors with Nonvolatile Fault Registers * * Copyright (C) 2011 Ericsson AB. */ #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/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/jiffies.h> enum chips { … }; /* * Registers */ #define MAX16065_ADC(x) … #define MAX16065_CURR_SENSE … #define MAX16065_CSP_ADC … #define MAX16065_FAULT(x) … #define MAX16065_SCALE(x) … #define MAX16065_CURR_CONTROL … #define MAX16065_LIMIT(l, x) … #define MAX16065_SW_ENABLE … #define MAX16065_WARNING_OV … #define MAX16065_CURR_ENABLE … #define MAX16065_NUM_LIMIT … #define MAX16065_NUM_ADC … static const int max16065_num_adc[] = …; static const bool max16065_have_secondary[] = …; static const bool max16065_have_current[] = …; struct max16065_data { … }; static const int max16065_adc_range[] = …; static const int max16065_csp_adc_range[] = …; /* ADC registers have 10 bit resolution. */ static inline int ADC_TO_MV(int adc, int range) { … } /* * Limit registers have 8 bit resolution and match upper 8 bits of ADC * registers. */ static inline int LIMIT_TO_MV(int limit, int range) { … } static inline int MV_TO_LIMIT(int mv, int range) { … } static inline int ADC_TO_CURR(int adc, int gain) { … } /* * max16065_read_adc() * * Read 16 bit value from <reg>, <reg+1>. * Upper 8 bits are in <reg>, lower 2 bits are in bits 7:6 of <reg+1>. */ static int max16065_read_adc(struct i2c_client *client, int reg) { … } static struct max16065_data *max16065_update_device(struct device *dev) { … } static ssize_t max16065_alarm_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t max16065_input_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t max16065_current_show(struct device *dev, struct device_attribute *da, char *buf) { … } static ssize_t max16065_limit_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { … } static ssize_t max16065_limit_show(struct device *dev, struct device_attribute *da, char *buf) { … } /* Construct a sensor_device_attribute structure for each register */ /* Input voltages */ static SENSOR_DEVICE_ATTR_RO(in0_input, max16065_input, 0); static SENSOR_DEVICE_ATTR_RO(in1_input, max16065_input, 1); static SENSOR_DEVICE_ATTR_RO(in2_input, max16065_input, 2); static SENSOR_DEVICE_ATTR_RO(in3_input, max16065_input, 3); static SENSOR_DEVICE_ATTR_RO(in4_input, max16065_input, 4); static SENSOR_DEVICE_ATTR_RO(in5_input, max16065_input, 5); static SENSOR_DEVICE_ATTR_RO(in6_input, max16065_input, 6); static SENSOR_DEVICE_ATTR_RO(in7_input, max16065_input, 7); static SENSOR_DEVICE_ATTR_RO(in8_input, max16065_input, 8); static SENSOR_DEVICE_ATTR_RO(in9_input, max16065_input, 9); static SENSOR_DEVICE_ATTR_RO(in10_input, max16065_input, 10); static SENSOR_DEVICE_ATTR_RO(in11_input, max16065_input, 11); static SENSOR_DEVICE_ATTR_RO(in12_input, max16065_input, 12); /* Input voltages lcrit */ static SENSOR_DEVICE_ATTR_2_RW(in0_lcrit, max16065_limit, 2, 0); static SENSOR_DEVICE_ATTR_2_RW(in1_lcrit, max16065_limit, 2, 1); static SENSOR_DEVICE_ATTR_2_RW(in2_lcrit, max16065_limit, 2, 2); static SENSOR_DEVICE_ATTR_2_RW(in3_lcrit, max16065_limit, 2, 3); static SENSOR_DEVICE_ATTR_2_RW(in4_lcrit, max16065_limit, 2, 4); static SENSOR_DEVICE_ATTR_2_RW(in5_lcrit, max16065_limit, 2, 5); static SENSOR_DEVICE_ATTR_2_RW(in6_lcrit, max16065_limit, 2, 6); static SENSOR_DEVICE_ATTR_2_RW(in7_lcrit, max16065_limit, 2, 7); static SENSOR_DEVICE_ATTR_2_RW(in8_lcrit, max16065_limit, 2, 8); static SENSOR_DEVICE_ATTR_2_RW(in9_lcrit, max16065_limit, 2, 9); static SENSOR_DEVICE_ATTR_2_RW(in10_lcrit, max16065_limit, 2, 10); static SENSOR_DEVICE_ATTR_2_RW(in11_lcrit, max16065_limit, 2, 11); /* Input voltages crit */ static SENSOR_DEVICE_ATTR_2_RW(in0_crit, max16065_limit, 1, 0); static SENSOR_DEVICE_ATTR_2_RW(in1_crit, max16065_limit, 1, 1); static SENSOR_DEVICE_ATTR_2_RW(in2_crit, max16065_limit, 1, 2); static SENSOR_DEVICE_ATTR_2_RW(in3_crit, max16065_limit, 1, 3); static SENSOR_DEVICE_ATTR_2_RW(in4_crit, max16065_limit, 1, 4); static SENSOR_DEVICE_ATTR_2_RW(in5_crit, max16065_limit, 1, 5); static SENSOR_DEVICE_ATTR_2_RW(in6_crit, max16065_limit, 1, 6); static SENSOR_DEVICE_ATTR_2_RW(in7_crit, max16065_limit, 1, 7); static SENSOR_DEVICE_ATTR_2_RW(in8_crit, max16065_limit, 1, 8); static SENSOR_DEVICE_ATTR_2_RW(in9_crit, max16065_limit, 1, 9); static SENSOR_DEVICE_ATTR_2_RW(in10_crit, max16065_limit, 1, 10); static SENSOR_DEVICE_ATTR_2_RW(in11_crit, max16065_limit, 1, 11); /* Input voltages min */ static SENSOR_DEVICE_ATTR_2_RW(in0_min, max16065_limit, 0, 0); static SENSOR_DEVICE_ATTR_2_RW(in1_min, max16065_limit, 0, 1); static SENSOR_DEVICE_ATTR_2_RW(in2_min, max16065_limit, 0, 2); static SENSOR_DEVICE_ATTR_2_RW(in3_min, max16065_limit, 0, 3); static SENSOR_DEVICE_ATTR_2_RW(in4_min, max16065_limit, 0, 4); static SENSOR_DEVICE_ATTR_2_RW(in5_min, max16065_limit, 0, 5); static SENSOR_DEVICE_ATTR_2_RW(in6_min, max16065_limit, 0, 6); static SENSOR_DEVICE_ATTR_2_RW(in7_min, max16065_limit, 0, 7); static SENSOR_DEVICE_ATTR_2_RW(in8_min, max16065_limit, 0, 8); static SENSOR_DEVICE_ATTR_2_RW(in9_min, max16065_limit, 0, 9); static SENSOR_DEVICE_ATTR_2_RW(in10_min, max16065_limit, 0, 10); static SENSOR_DEVICE_ATTR_2_RW(in11_min, max16065_limit, 0, 11); /* Input voltages max */ static SENSOR_DEVICE_ATTR_2_RW(in0_max, max16065_limit, 0, 0); static SENSOR_DEVICE_ATTR_2_RW(in1_max, max16065_limit, 0, 1); static SENSOR_DEVICE_ATTR_2_RW(in2_max, max16065_limit, 0, 2); static SENSOR_DEVICE_ATTR_2_RW(in3_max, max16065_limit, 0, 3); static SENSOR_DEVICE_ATTR_2_RW(in4_max, max16065_limit, 0, 4); static SENSOR_DEVICE_ATTR_2_RW(in5_max, max16065_limit, 0, 5); static SENSOR_DEVICE_ATTR_2_RW(in6_max, max16065_limit, 0, 6); static SENSOR_DEVICE_ATTR_2_RW(in7_max, max16065_limit, 0, 7); static SENSOR_DEVICE_ATTR_2_RW(in8_max, max16065_limit, 0, 8); static SENSOR_DEVICE_ATTR_2_RW(in9_max, max16065_limit, 0, 9); static SENSOR_DEVICE_ATTR_2_RW(in10_max, max16065_limit, 0, 10); static SENSOR_DEVICE_ATTR_2_RW(in11_max, max16065_limit, 0, 11); /* alarms */ static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, max16065_alarm, 0, 0); static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, max16065_alarm, 0, 1); static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, max16065_alarm, 0, 2); static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, max16065_alarm, 0, 3); static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, max16065_alarm, 0, 4); static SENSOR_DEVICE_ATTR_2_RO(in5_alarm, max16065_alarm, 0, 5); static SENSOR_DEVICE_ATTR_2_RO(in6_alarm, max16065_alarm, 0, 6); static SENSOR_DEVICE_ATTR_2_RO(in7_alarm, max16065_alarm, 0, 7); static SENSOR_DEVICE_ATTR_2_RO(in8_alarm, max16065_alarm, 1, 0); static SENSOR_DEVICE_ATTR_2_RO(in9_alarm, max16065_alarm, 1, 1); static SENSOR_DEVICE_ATTR_2_RO(in10_alarm, max16065_alarm, 1, 2); static SENSOR_DEVICE_ATTR_2_RO(in11_alarm, max16065_alarm, 1, 3); /* Current and alarm */ static SENSOR_DEVICE_ATTR_RO(curr1_input, max16065_current, 0); static SENSOR_DEVICE_ATTR_2_RO(curr1_alarm, max16065_alarm, 1, 4); /* * Finally, construct an array of pointers to members of the above objects, * as required for sysfs_create_group() */ static struct attribute *max16065_basic_attributes[] = …; static struct attribute *max16065_current_attributes[] = …; static struct attribute *max16065_min_attributes[] = …; static struct attribute *max16065_max_attributes[] = …; static umode_t max16065_basic_is_visible(struct kobject *kobj, struct attribute *a, int n) { … } static umode_t max16065_secondary_is_visible(struct kobject *kobj, struct attribute *a, int index) { … } static const struct attribute_group max16065_basic_group = …; static const struct attribute_group max16065_current_group = …; static const struct attribute_group max16065_min_group = …; static const struct attribute_group max16065_max_group = …; static int max16065_probe(struct i2c_client *client) { … } static const struct i2c_device_id max16065_id[] = …; MODULE_DEVICE_TABLE(i2c, max16065_id); /* This is the driver that will be inserted */ static struct i2c_driver max16065_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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