diff options
Diffstat (limited to 'drivers/hwmon/max16065.c')
| -rw-r--r-- | drivers/hwmon/max16065.c | 717 |
1 files changed, 717 insertions, 0 deletions
diff --git a/drivers/hwmon/max16065.c b/drivers/hwmon/max16065.c new file mode 100644 index 000000000000..d94a24fdf4ba --- /dev/null +++ b/drivers/hwmon/max16065.c @@ -0,0 +1,717 @@ +/* + * 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. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + */ + +#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/delay.h> +#include <linux/jiffies.h> + +enum chips { max16065, max16066, max16067, max16068, max16070, max16071 }; + +/* + * Registers + */ +#define MAX16065_ADC(x) ((x) * 2) + +#define MAX16065_CURR_SENSE 0x18 +#define MAX16065_CSP_ADC 0x19 +#define MAX16065_FAULT(x) (0x1b + (x)) +#define MAX16065_SCALE(x) (0x43 + (x)) +#define MAX16065_CURR_CONTROL 0x47 +#define MAX16065_LIMIT(l, x) (0x48 + (l) + (x) * 3) /* + * l: limit + * 0: min/max + * 1: crit + * 2: lcrit + * x: ADC index + */ + +#define MAX16065_SW_ENABLE 0x73 + +#define MAX16065_WARNING_OV (1 << 3) /* Set if secondary threshold is OV + warning */ + +#define MAX16065_CURR_ENABLE (1 << 0) + +#define MAX16065_NUM_LIMIT 3 +#define MAX16065_NUM_ADC 12 /* maximum number of ADC channels */ + +static const int max16065_num_adc[] = { + [max16065] = 12, + [max16066] = 8, + [max16067] = 6, + [max16068] = 6, + [max16070] = 12, + [max16071] = 8, +}; + +static const bool max16065_have_secondary[] = { + [max16065] = true, + [max16066] = true, + [max16067] = false, + [max16068] = false, + [max16070] = true, + [max16071] = true, +}; + +static const bool max16065_have_current[] = { + [max16065] = true, + [max16066] = true, + [max16067] = false, + [max16068] = false, + [max16070] = true, + [max16071] = true, +}; + +struct max16065_data { + enum chips type; + struct device *hwmon_dev; + struct mutex update_lock; + bool valid; + unsigned long last_updated; /* in jiffies */ + int num_adc; + bool have_current; + int curr_gain; + /* limits are in mV */ + int limit[MAX16065_NUM_LIMIT][MAX16065_NUM_ADC]; + int range[MAX16065_NUM_ADC + 1];/* voltage range */ + int adc[MAX16065_NUM_ADC + 1]; /* adc values (raw) including csp_adc */ + int curr_sense; + int fault[2]; +}; + +static const int max16065_adc_range[] = { 5560, 2780, 1390, 0 }; +static const int max16065_csp_adc_range[] = { 7000, 14000 }; + +/* ADC registers have 10 bit resolution. */ +static inline int ADC_TO_MV(int adc, int range) +{ + return (adc * range) / 1024; +} + +/* + * Limit registers have 8 bit resolution and match upper 8 bits of ADC + * registers. + */ +static inline int LIMIT_TO_MV(int limit, int range) +{ + return limit * range / 256; +} + +static inline int MV_TO_LIMIT(int mv, int range) +{ + return SENSORS_LIMIT(DIV_ROUND_CLOSEST(mv * 256, range), 0, 255); +} + +static inline int ADC_TO_CURR(int adc, int gain) +{ + return adc * 1400000 / gain * 255; +} + +/* + * 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) +{ + int rv; + + rv = i2c_smbus_read_word_data(client, reg); + if (unlikely(rv < 0)) + return rv; + return ((rv & 0xff) << 2) | ((rv >> 14) & 0x03); +} + +static struct max16065_data *max16065_update_device(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + + mutex_lock(&data->update_lock); + if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { + int i; + + for (i = 0; i < data->num_adc; i++) + data->adc[i] + = max16065_read_adc(client, MAX16065_ADC(i)); + + if (data->have_current) { + data->adc[MAX16065_NUM_ADC] + = max16065_read_adc(client, MAX16065_CSP_ADC); + data->curr_sense + = i2c_smbus_read_byte_data(client, + MAX16065_CURR_SENSE); + } + + for (i = 0; i < DIV_ROUND_UP(data->num_adc, 8); i++) + data->fault[i] + = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i)); + + data->last_updated = jiffies; + data->valid = 1; + } + mutex_unlock(&data->update_lock); + return data; +} + +static ssize_t max16065_show_alarm(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); + struct max16065_data *data = max16065_update_device(dev); + int val = data->fault[attr2->nr]; + + if (val < 0) + return val; + + val &= (1 << attr2->index); + if (val) + i2c_smbus_write_byte_data(to_i2c_client(dev), + MAX16065_FAULT(attr2->nr), val); + + return snprintf(buf, PAGE_SIZE, "%d\n", !!val); +} + +static ssize_t max16065_show_input(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + struct max16065_data *data = max16065_update_device(dev); + int adc = data->adc[attr->index]; + + if (unlikely(adc < 0)) + return adc; + + return snprintf(buf, PAGE_SIZE, "%d\n", + ADC_TO_MV(adc, data->range[attr->index])); +} + +static ssize_t max16065_show_current(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct max16065_data *data = max16065_update_device(dev); + + if (unlikely(data->curr_sense < 0)) + return data->curr_sense; + + return snprintf(buf, PAGE_SIZE, "%d\n", + ADC_TO_CURR(data->curr_sense, data->curr_gain)); +} + +static ssize_t max16065_set_limit(struct device *dev, + struct device_attribute *da, + const char *buf, size_t count) +{ + struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + unsigned long val; + int err; + int limit; + + err = strict_strtoul(buf, 10, &val); + if (unlikely(err < 0)) + return err; + + limit = MV_TO_LIMIT(val, data->range[attr2->index]); + + mutex_lock(&data->update_lock); + data->limit[attr2->nr][attr2->index] + = LIMIT_TO_MV(limit, data->range[attr2->index]); + i2c_smbus_write_byte_data(client, + MAX16065_LIMIT(attr2->nr, attr2->index), + limit); + mutex_unlock(&data->update_lock); + + return count; +} + +static ssize_t max16065_show_limit(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); + struct i2c_client *client = to_i2c_client(dev); + struct max16065_data *data = i2c_get_clientdata(client); + + return snprintf(buf, PAGE_SIZE, "%d\n", + data->limit[attr2->nr][attr2->index]); +} + +/* Construct a sensor_device_attribute structure for each register */ + +/* Input voltages */ +static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, max16065_show_input, NULL, 0); +static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, max16065_show_input, NULL, 1); +static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, max16065_show_input, NULL, 2); +static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, max16065_show_input, NULL, 3); +static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, max16065_show_input, NULL, 4); +static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, max16065_show_input, NULL, 5); +static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, max16065_show_input, NULL, 6); +static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, max16065_show_input, NULL, 7); +static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, max16065_show_input, NULL, 8); +static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, max16065_show_input, NULL, 9); +static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, max16065_show_input, NULL, 10); +static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, max16065_show_input, NULL, 11); +static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, max16065_show_input, NULL, 12); + +/* Input voltages lcrit */ +static SENSOR_DEVICE_ATTR_2(in0_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 0); +static SENSOR_DEVICE_ATTR_2(in1_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 1); +static SENSOR_DEVICE_ATTR_2(in2_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 2); +static SENSOR_DEVICE_ATTR_2(in3_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 3); +static SENSOR_DEVICE_ATTR_2(in4_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 4); +static SENSOR_DEVICE_ATTR_2(in5_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 5); +static SENSOR_DEVICE_ATTR_2(in6_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 6); +static SENSOR_DEVICE_ATTR_2(in7_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 7); +static SENSOR_DEVICE_ATTR_2(in8_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 8); +static SENSOR_DEVICE_ATTR_2(in9_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 9); +static SENSOR_DEVICE_ATTR_2(in10_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 10); +static SENSOR_DEVICE_ATTR_2(in11_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 2, 11); + +/* Input voltages crit */ +static SENSOR_DEVICE_ATTR_2(in0_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 0); +static SENSOR_DEVICE_ATTR_2(in1_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 1); +static SENSOR_DEVICE_ATTR_2(in2_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 2); +static SENSOR_DEVICE_ATTR_2(in3_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 3); +static SENSOR_DEVICE_ATTR_2(in4_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 4); +static SENSOR_DEVICE_ATTR_2(in5_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 5); +static SENSOR_DEVICE_ATTR_2(in6_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 6); +static SENSOR_DEVICE_ATTR_2(in7_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 7); +static SENSOR_DEVICE_ATTR_2(in8_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 8); +static SENSOR_DEVICE_ATTR_2(in9_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 9); +static SENSOR_DEVICE_ATTR_2(in10_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 10); +static SENSOR_DEVICE_ATTR_2(in11_crit, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 1, 11); + +/* Input voltages min */ +static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 0); +static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 1); +static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 2); +static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 3); +static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 4); +static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 5); +static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 6); +static SENSOR_DEVICE_ATTR_2(in7_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 7); +static SENSOR_DEVICE_ATTR_2(in8_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 8); +static SENSOR_DEVICE_ATTR_2(in9_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 9); +static SENSOR_DEVICE_ATTR_2(in10_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 10); +static SENSOR_DEVICE_ATTR_2(in11_min, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 11); + +/* Input voltages max */ +static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 0); +static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 1); +static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 2); +static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 3); +static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 4); +static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 5); +static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 6); +static SENSOR_DEVICE_ATTR_2(in7_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 7); +static SENSOR_DEVICE_ATTR_2(in8_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 8); +static SENSOR_DEVICE_ATTR_2(in9_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 9); +static SENSOR_DEVICE_ATTR_2(in10_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 10); +static SENSOR_DEVICE_ATTR_2(in11_max, S_IWUSR | S_IRUGO, max16065_show_limit, + max16065_set_limit, 0, 11); + +/* alarms */ +static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, max16065_show_alarm, NULL, + 0, 0); +static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, max16065_show_alarm, NULL, + 0, 1); +static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, max16065_show_alarm, NULL, + 0, 2); +static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, max16065_show_alarm, NULL, + 0, 3); +static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, max16065_show_alarm, NULL, + 0, 4); +static SENSOR_DEVICE_ATTR_2(in5_alarm, S_IRUGO, max16065_show_alarm, NULL, + 0, 5); +static SENSOR_DEVICE_ATTR_2(in6_alarm, S_IRUGO, max16065_show_alarm, NULL, + 0, 6); +static SENSOR_DEVICE_ATTR_2(in7_alarm, S_IRUGO, max16065_show_alarm, NULL, + 0, 7); +static SENSOR_DEVICE_ATTR_2(in8_alarm, S_IRUGO, max16065_show_alarm, NULL, + 1, 0); +static SENSOR_DEVICE_ATTR_2(in9_alarm, S_IRUGO, max16065_show_alarm, NULL, + 1, 1); +static SENSOR_DEVICE_ATTR_2(in10_alarm, S_IRUGO, max16065_show_alarm, NULL, + 1, 2); +static SENSOR_DEVICE_ATTR_2(in11_alarm, S_IRUGO, max16065_show_alarm, NULL, + 1, 3); + +/* Current and alarm */ +static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, max16065_show_current, NULL, 0); +static SENSOR_DEVICE_ATTR_2(curr1_alarm, S_IRUGO, max16065_show_alarm, NULL, + 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[] = { + &sensor_dev_attr_in0_input.dev_attr.attr, + &sensor_dev_attr_in0_lcrit.dev_attr.attr, + &sensor_dev_attr_in0_crit.dev_attr.attr, + &sensor_dev_attr_in0_alarm.dev_attr.attr, + + &sensor_dev_attr_in1_input.dev_attr.attr, + &sensor_dev_attr_in1_lcrit.dev_attr.attr, + &sensor_dev_attr_in1_crit.dev_attr.attr, + &sensor_dev_attr_in1_alarm.dev_attr.attr, + + &sensor_dev_attr_in2_input.dev_attr.attr, + &sensor_dev_attr_in2_lcrit.dev_attr.attr, + &sensor_dev_attr_in2_crit.dev_attr.attr, + &sensor_dev_attr_in2_alarm.dev_attr.attr, + + &sensor_dev_attr_in3_input.dev_attr.attr, + &sensor_dev_attr_in3_lcrit.dev_attr.attr, + &sensor_dev_attr_in3_crit.dev_attr.attr, + &sensor_dev_attr_in3_alarm.dev_attr.attr, + + &sensor_dev_attr_in4_input.dev_attr.attr, + &sensor_dev_attr_in4_lcrit.dev_attr.attr, + &sensor_dev_attr_in4_crit.dev_attr.attr, + &sensor_dev_attr_in4_alarm.dev_attr.attr, + + &sensor_dev_attr_in5_input.dev_attr.attr, + &sensor_dev_attr_in5_lcrit.dev_attr.attr, + &sensor_dev_attr_in5_crit.dev_attr.attr, + &sensor_dev_attr_in5_alarm.dev_attr.attr, + + &sensor_dev_attr_in6_input.dev_attr.attr, + &sensor_dev_attr_in6_lcrit.dev_attr.attr, + &sensor_dev_attr_in6_crit.dev_attr.attr, + &sensor_dev_attr_in6_alarm.dev_attr.attr, + + &sensor_dev_attr_in7_input.dev_attr.attr, + &sensor_dev_attr_in7_lcrit.dev_attr.attr, + &sensor_dev_attr_in7_crit.dev_attr.attr, + &sensor_dev_attr_in7_alarm.dev_attr.attr, + + &sensor_dev_attr_in8_input.dev_attr.attr, + &sensor_dev_attr_in8_lcrit.dev_attr.attr, + &sensor_dev_attr_in8_crit.dev_attr.attr, + &sensor_dev_attr_in8_alarm.dev_attr.attr, + + &sensor_dev_attr_in9_input.dev_attr.attr, + &sensor_dev_attr_in9_lcrit.dev_attr.attr, + &sensor_dev_attr_in9_crit.dev_attr.attr, + &sensor_dev_attr_in9_alarm.dev_attr.attr, + + &sensor_dev_attr_in10_input.dev_attr.attr, + &sensor_dev_attr_in10_lcrit.dev_attr.attr, + &sensor_dev_attr_in10_crit.dev_attr.attr, + &sensor_dev_attr_in10_alarm.dev_attr.attr, + + &sensor_dev_attr_in11_input.dev_attr.attr, + &sensor_dev_attr_in11_lcrit.dev_attr.attr, + &sensor_dev_attr_in11_crit.dev_attr.attr, + &sensor_dev_attr_in11_alarm.dev_attr.attr, + + NULL +}; + +static struct attribute *max16065_current_attributes[] = { + &sensor_dev_attr_in12_input.dev_attr.attr, + &sensor_dev_attr_curr1_input.dev_attr.attr, + &sensor_dev_attr_curr1_alarm.dev_attr.attr, + NULL +}; + +static struct attribute *max16065_min_attributes[] = { + &sensor_dev_attr_in0_min.dev_attr.attr, + &sensor_dev_attr_in1_min.dev_attr.attr, + &sensor_dev_attr_in2_min.dev_attr.attr, + &sensor_dev_attr_in3_min.dev_attr.attr, + &sensor_dev_attr_in4_min.dev_attr.attr, + &sensor_dev_attr_in5_min.dev_attr.attr, + &sensor_dev_attr_in6_min.dev_attr.attr, + &sensor_dev_attr_in7_min.dev_attr.attr, + &sensor_dev_attr_in8_min.dev_attr.attr, + &sensor_dev_attr_in9_min.dev_attr.attr, + &sensor_dev_attr_in10_min.dev_attr.attr, + &sensor_dev_attr_in11_min.dev_attr.attr, + NULL +}; + +static struct attribute *max16065_max_attributes[] = { + &sensor_dev_attr_in0_max.dev_attr.attr, + &sensor_dev_attr_in1_max.dev_attr.attr, + &sensor_dev_attr_in2_max.dev_attr.attr, + &sensor_dev_attr_in3_max.dev_attr.attr, + &sensor_dev_attr_in4_max.dev_attr.attr, + &sensor_dev_attr_in5_max.dev_attr.attr, + &sensor_dev_attr_in6_max.dev_attr.attr, + &sensor_dev_attr_in7_max.dev_attr.attr, + &sensor_dev_attr_in8_max.dev_attr.attr, + &sensor_dev_attr_in9_max.dev_attr.attr, + &sensor_dev_attr_in10_max.dev_attr.attr, + &sensor_dev_attr_in11_max.dev_attr.attr, + NULL +}; + +static const struct attribute_group max16065_basic_group = { + .attrs = max16065_basic_attributes, +}; + +static const struct attribute_group max16065_current_group = { + .attrs = max16065_current_attributes, +}; + +static const struct attribute_group max16065_min_group = { + .attrs = max16065_min_attributes, +}; + +static const struct attribute_group max16065_max_group = { + .attrs = max16065_max_attributes, +}; + +static void max16065_cleanup(struct i2c_client *client) +{ + sysfs_remove_group(&client->dev.kobj, &max16065_max_group); + sysfs_remove_group(&client->dev.kobj, &max16065_min_group); + sysfs_remove_group(&client->dev.kobj, &max16065_current_group); + sysfs_remove_group(&client->dev.kobj, &max16065_basic_group); +} + +static int max16065_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = client->adapter; + struct max16065_data *data; + int i, j, val, ret; + bool have_secondary; /* true if chip has secondary limits */ + bool secondary_is_max = false; /* secondary limits reflect max */ + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA + | I2C_FUNC_SMBUS_READ_WORD_DATA)) + return -ENODEV; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (unlikely(!data)) + return -ENOMEM; + + i2c_set_clientdata(client, data); + mutex_init(&data->update_lock); + + data->num_adc = max16065_num_adc[id->driver_data]; + data->have_current = max16065_have_current[id->driver_data]; + have_secondary = max16065_have_secondary[id->driver_data]; + + if (have_secondary) { + val = i2c_smbus_read_byte_data(client, MAX16065_SW_ENABLE); + if (unlikely(val < 0)) { + ret = val; + goto out_free; + } + secondary_is_max = val & MAX16065_WARNING_OV; + } + + /* Read scale registers, convert to range */ + for (i = 0; i < DIV_ROUND_UP(data->num_adc, 4); i++) { + val = i2c_smbus_read_byte_data(client, MAX16065_SCALE(i)); + if (unlikely(val < 0)) { + ret = val; + goto out_free; + } + for (j = 0; j < 4 && i * 4 + j < data->num_adc; j++) { + data->range[i * 4 + j] = + max16065_adc_range[(val >> (j * 2)) & 0x3]; + } + } + + /* Read limits */ + for (i = 0; i < MAX16065_NUM_LIMIT; i++) { + if (i == 0 && !have_secondary) + continue; + + for (j = 0; j < data->num_adc; j++) { + val = i2c_smbus_read_byte_data(client, + MAX16065_LIMIT(i, j)); + if (unlikely(val < 0)) { + ret = val; + goto out_free; + } + data->limit[i][j] = LIMIT_TO_MV(val, data->range[j]); + } + } + + /* Register sysfs hooks */ + for (i = 0; i < data->num_adc * 4; i++) { + /* Do not create sysfs entry if channel is disabled */ + if (!data->range[i / 4]) + continue; + + ret = sysfs_create_file(&client->dev.kobj, + max16065_basic_attributes[i]); + if (unlikely(ret)) + goto out; + } + + if (have_secondary) { + struct attribute **attr = secondary_is_max ? + max16065_max_attributes : max16065_min_attributes; + + for (i = 0; i < data->num_adc; i++) { + if (!data->range[i]) + continue; + + ret = sysfs_create_file(&client->dev.kobj, attr[i]); + if (unlikely(ret)) + goto out; + } + } + + if (data->have_current) { + val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL); + if (unlikely(val < 0)) { + ret = val; + goto out; + } + if (val & MAX16065_CURR_ENABLE) { + /* + * Current gain is 6, 12, 24, 48 based on values in + * bit 2,3. + */ + data->curr_gain = 6 << ((val >> 2) & 0x03); + data->range[MAX16065_NUM_ADC] + = max16065_csp_adc_range[(val >> 1) & 0x01]; + ret = sysfs_create_group(&client->dev.kobj, + &max16065_current_group); + if (unlikely(ret)) + goto out; + } else { + data->have_current = false; + } + } + + data->hwmon_dev = hwmon_device_register(&client->dev); + if (unlikely(IS_ERR(data->hwmon_dev))) { + ret = PTR_ERR(data->hwmon_dev); + goto out; + } + return 0; + +out: + max16065_cleanup(client); +out_free: + kfree(data); + return ret; +} + +static int max16065_remove(struct i2c_client *client) +{ + struct max16065_data *data = i2c_get_clientdata(client); + + hwmon_device_unregister(data->hwmon_dev); + max16065_cleanup(client); + kfree(data); + + return 0; +} + +static const struct i2c_device_id max16065_id[] = { + { "max16065", max16065 }, + { "max16066", max16066 }, + { "max16067", max16067 }, + { "max16068", max16068 }, + { "max16070", max16070 }, + { "max16071", max16071 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, max16065_id); + +/* This is the driver that will be inserted */ +static struct i2c_driver max16065_driver = { + .driver = { + .name = "max16065", + }, + .probe = max16065_probe, + .remove = max16065_remove, + .id_table = max16065_id, +}; + +static int __init max16065_init(void) +{ + return i2c_add_driver(&max16065_driver); +} + +static void __exit max16065_exit(void) +{ + i2c_del_driver(&max16065_driver); +} + +MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>"); +MODULE_DESCRIPTION("MAX16065 driver"); +MODULE_LICENSE("GPL"); + +module_init(max16065_init); +module_exit(max16065_exit); |