forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
611 lines
19 KiB
611 lines
19 KiB
// 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 { 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 i2c_client *client; |
|
const struct attribute_group *groups[4]; |
|
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 clamp_val(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_swapped(client, reg); |
|
if (unlikely(rv < 0)) |
|
return rv; |
|
return rv >> 6; |
|
} |
|
|
|
static struct max16065_data *max16065_update_device(struct device *dev) |
|
{ |
|
struct max16065_data *data = dev_get_drvdata(dev); |
|
struct i2c_client *client = data->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_alarm_show(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(data->client, |
|
MAX16065_FAULT(attr2->nr), val); |
|
|
|
return sysfs_emit(buf, "%d\n", !!val); |
|
} |
|
|
|
static ssize_t max16065_input_show(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 sysfs_emit(buf, "%d\n", |
|
ADC_TO_MV(adc, data->range[attr->index])); |
|
} |
|
|
|
static ssize_t max16065_current_show(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 sysfs_emit(buf, "%d\n", |
|
ADC_TO_CURR(data->curr_sense, data->curr_gain)); |
|
} |
|
|
|
static ssize_t max16065_limit_store(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 max16065_data *data = dev_get_drvdata(dev); |
|
unsigned long val; |
|
int err; |
|
int limit; |
|
|
|
err = kstrtoul(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(data->client, |
|
MAX16065_LIMIT(attr2->nr, attr2->index), |
|
limit); |
|
mutex_unlock(&data->update_lock); |
|
|
|
return count; |
|
} |
|
|
|
static ssize_t max16065_limit_show(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 = dev_get_drvdata(dev); |
|
|
|
return sysfs_emit(buf, "%d\n", |
|
data->limit[attr2->nr][attr2->index]); |
|
} |
|
|
|
/* 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[] = { |
|
&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 umode_t max16065_basic_is_visible(struct kobject *kobj, |
|
struct attribute *a, int n) |
|
{ |
|
struct device *dev = kobj_to_dev(kobj); |
|
struct max16065_data *data = dev_get_drvdata(dev); |
|
int index = n / 4; |
|
|
|
if (index >= data->num_adc || !data->range[index]) |
|
return 0; |
|
return a->mode; |
|
} |
|
|
|
static umode_t max16065_secondary_is_visible(struct kobject *kobj, |
|
struct attribute *a, int index) |
|
{ |
|
struct device *dev = kobj_to_dev(kobj); |
|
struct max16065_data *data = dev_get_drvdata(dev); |
|
|
|
if (index >= data->num_adc) |
|
return 0; |
|
return a->mode; |
|
} |
|
|
|
static const struct attribute_group max16065_basic_group = { |
|
.attrs = max16065_basic_attributes, |
|
.is_visible = max16065_basic_is_visible, |
|
}; |
|
|
|
static const struct attribute_group max16065_current_group = { |
|
.attrs = max16065_current_attributes, |
|
}; |
|
|
|
static const struct attribute_group max16065_min_group = { |
|
.attrs = max16065_min_attributes, |
|
.is_visible = max16065_secondary_is_visible, |
|
}; |
|
|
|
static const struct attribute_group max16065_max_group = { |
|
.attrs = max16065_max_attributes, |
|
.is_visible = max16065_secondary_is_visible, |
|
}; |
|
|
|
static const struct i2c_device_id max16065_id[]; |
|
|
|
static int max16065_probe(struct i2c_client *client) |
|
{ |
|
struct i2c_adapter *adapter = client->adapter; |
|
struct max16065_data *data; |
|
struct device *dev = &client->dev; |
|
struct device *hwmon_dev; |
|
int i, j, val; |
|
bool have_secondary; /* true if chip has secondary limits */ |
|
bool secondary_is_max = false; /* secondary limits reflect max */ |
|
int groups = 0; |
|
const struct i2c_device_id *id = i2c_match_id(max16065_id, client); |
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
|
| I2C_FUNC_SMBUS_READ_WORD_DATA)) |
|
return -ENODEV; |
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
|
if (unlikely(!data)) |
|
return -ENOMEM; |
|
|
|
data->client = client; |
|
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)) |
|
return val; |
|
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)) |
|
return val; |
|
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)) |
|
return val; |
|
data->limit[i][j] = LIMIT_TO_MV(val, data->range[j]); |
|
} |
|
} |
|
|
|
/* sysfs hooks */ |
|
data->groups[groups++] = &max16065_basic_group; |
|
if (have_secondary) |
|
data->groups[groups++] = secondary_is_max ? |
|
&max16065_max_group : &max16065_min_group; |
|
|
|
if (data->have_current) { |
|
val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL); |
|
if (unlikely(val < 0)) |
|
return val; |
|
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]; |
|
data->groups[groups++] = &max16065_current_group; |
|
} else { |
|
data->have_current = false; |
|
} |
|
} |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
|
data, data->groups); |
|
return PTR_ERR_OR_ZERO(hwmon_dev); |
|
} |
|
|
|
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_new = max16065_probe, |
|
.id_table = max16065_id, |
|
}; |
|
|
|
module_i2c_driver(max16065_driver); |
|
|
|
MODULE_AUTHOR("Guenter Roeck <[email protected]>"); |
|
MODULE_DESCRIPTION("MAX16065 driver"); |
|
MODULE_LICENSE("GPL");
|
|
|