| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net> |
| * |
| * based on max1668.c |
| * Copyright (c) 2011 David George <david.george@ska.ac.za> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/jiffies.h> |
| #include <linux/i2c.h> |
| #include <linux/hwmon.h> |
| #include <linux/hwmon-sysfs.h> |
| #include <linux/err.h> |
| #include <linux/mutex.h> |
| #include <linux/of_device.h> |
| #include <linux/of.h> |
| |
| #include <linux/platform_data/max6697.h> |
| |
| enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694, |
| max6697, max6698, max6699 }; |
| |
| /* Report local sensor as temp1 */ |
| |
| static const u8 MAX6697_REG_TEMP[] = { |
| 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 }; |
| static const u8 MAX6697_REG_TEMP_EXT[] = { |
| 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 }; |
| static const u8 MAX6697_REG_MAX[] = { |
| 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 }; |
| static const u8 MAX6697_REG_CRIT[] = { |
| 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 }; |
| |
| /* |
| * Map device tree / platform data register bit map to chip bit map. |
| * Applies to alert register and over-temperature register. |
| */ |
| #define MAX6697_ALERT_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ |
| (((reg) & 0x01) << 6) | ((reg) & 0x80)) |
| #define MAX6697_OVERT_MAP_BITS(reg) (((reg) >> 1) | (((reg) & 0x01) << 7)) |
| |
| #define MAX6697_REG_STAT(n) (0x44 + (n)) |
| |
| #define MAX6697_REG_CONFIG 0x41 |
| #define MAX6581_CONF_EXTENDED (1 << 1) |
| #define MAX6693_CONF_BETA (1 << 2) |
| #define MAX6697_CONF_RESISTANCE (1 << 3) |
| #define MAX6697_CONF_TIMEOUT (1 << 5) |
| #define MAX6697_REG_ALERT_MASK 0x42 |
| #define MAX6697_REG_OVERT_MASK 0x43 |
| |
| #define MAX6581_REG_RESISTANCE 0x4a |
| #define MAX6581_REG_IDEALITY 0x4b |
| #define MAX6581_REG_IDEALITY_SELECT 0x4c |
| #define MAX6581_REG_OFFSET 0x4d |
| #define MAX6581_REG_OFFSET_SELECT 0x4e |
| #define MAX6581_OFFSET_MIN -31750 |
| #define MAX6581_OFFSET_MAX 31750 |
| |
| #define MAX6697_CONV_TIME 156 /* ms per channel, worst case */ |
| |
| struct max6697_chip_data { |
| int channels; |
| u32 have_ext; |
| u32 have_crit; |
| u32 have_fault; |
| u8 valid_conf; |
| const u8 *alarm_map; |
| }; |
| |
| struct max6697_data { |
| struct i2c_client *client; |
| |
| enum chips type; |
| const struct max6697_chip_data *chip; |
| |
| int update_interval; /* in milli-seconds */ |
| int temp_offset; /* in degrees C */ |
| |
| struct mutex update_lock; |
| unsigned long last_updated; /* In jiffies */ |
| bool valid; /* true if following fields are valid */ |
| |
| /* 1x local and up to 7x remote */ |
| u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */ |
| #define MAX6697_TEMP_INPUT 0 |
| #define MAX6697_TEMP_EXT 1 |
| #define MAX6697_TEMP_MAX 2 |
| #define MAX6697_TEMP_CRIT 3 |
| u32 alarms; |
| }; |
| |
| /* Diode fault status bits on MAX6581 are right shifted by one bit */ |
| static const u8 max6581_alarm_map[] = { |
| 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, |
| 16, 17, 18, 19, 20, 21, 22, 23 }; |
| |
| static const struct max6697_chip_data max6697_chip_data[] = { |
| [max6581] = { |
| .channels = 8, |
| .have_crit = 0xff, |
| .have_ext = 0x7f, |
| .have_fault = 0xfe, |
| .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT, |
| .alarm_map = max6581_alarm_map, |
| }, |
| [max6602] = { |
| .channels = 5, |
| .have_crit = 0x12, |
| .have_ext = 0x02, |
| .have_fault = 0x1e, |
| .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| }, |
| [max6622] = { |
| .channels = 5, |
| .have_crit = 0x12, |
| .have_ext = 0x02, |
| .have_fault = 0x1e, |
| .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| }, |
| [max6636] = { |
| .channels = 7, |
| .have_crit = 0x72, |
| .have_ext = 0x02, |
| .have_fault = 0x7e, |
| .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| }, |
| [max6689] = { |
| .channels = 7, |
| .have_crit = 0x72, |
| .have_ext = 0x02, |
| .have_fault = 0x7e, |
| .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| }, |
| [max6693] = { |
| .channels = 7, |
| .have_crit = 0x72, |
| .have_ext = 0x02, |
| .have_fault = 0x7e, |
| .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | |
| MAX6697_CONF_TIMEOUT, |
| }, |
| [max6694] = { |
| .channels = 5, |
| .have_crit = 0x12, |
| .have_ext = 0x02, |
| .have_fault = 0x1e, |
| .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | |
| MAX6697_CONF_TIMEOUT, |
| }, |
| [max6697] = { |
| .channels = 7, |
| .have_crit = 0x72, |
| .have_ext = 0x02, |
| .have_fault = 0x7e, |
| .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| }, |
| [max6698] = { |
| .channels = 7, |
| .have_crit = 0x72, |
| .have_ext = 0x02, |
| .have_fault = 0x0e, |
| .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| }, |
| [max6699] = { |
| .channels = 5, |
| .have_crit = 0x12, |
| .have_ext = 0x02, |
| .have_fault = 0x1e, |
| .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
| }, |
| }; |
| |
| static inline int max6581_offset_to_millic(int val) |
| { |
| return sign_extend32(val, 7) * 250; |
| } |
| |
| static struct max6697_data *max6697_update_device(struct device *dev) |
| { |
| struct max6697_data *data = dev_get_drvdata(dev); |
| struct i2c_client *client = data->client; |
| struct max6697_data *ret = data; |
| int val; |
| int i; |
| u32 alarms; |
| |
| mutex_lock(&data->update_lock); |
| |
| if (data->valid && |
| !time_after(jiffies, data->last_updated |
| + msecs_to_jiffies(data->update_interval))) |
| goto abort; |
| |
| for (i = 0; i < data->chip->channels; i++) { |
| if (data->chip->have_ext & (1 << i)) { |
| val = i2c_smbus_read_byte_data(client, |
| MAX6697_REG_TEMP_EXT[i]); |
| if (unlikely(val < 0)) { |
| ret = ERR_PTR(val); |
| goto abort; |
| } |
| data->temp[i][MAX6697_TEMP_EXT] = val; |
| } |
| |
| val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]); |
| if (unlikely(val < 0)) { |
| ret = ERR_PTR(val); |
| goto abort; |
| } |
| data->temp[i][MAX6697_TEMP_INPUT] = val; |
| |
| val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]); |
| if (unlikely(val < 0)) { |
| ret = ERR_PTR(val); |
| goto abort; |
| } |
| data->temp[i][MAX6697_TEMP_MAX] = val; |
| |
| if (data->chip->have_crit & (1 << i)) { |
| val = i2c_smbus_read_byte_data(client, |
| MAX6697_REG_CRIT[i]); |
| if (unlikely(val < 0)) { |
| ret = ERR_PTR(val); |
| goto abort; |
| } |
| data->temp[i][MAX6697_TEMP_CRIT] = val; |
| } |
| } |
| |
| alarms = 0; |
| for (i = 0; i < 3; i++) { |
| val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i)); |
| if (unlikely(val < 0)) { |
| ret = ERR_PTR(val); |
| goto abort; |
| } |
| alarms = (alarms << 8) | val; |
| } |
| data->alarms = alarms; |
| data->last_updated = jiffies; |
| data->valid = true; |
| abort: |
| mutex_unlock(&data->update_lock); |
| |
| return ret; |
| } |
| |
| static ssize_t temp_input_show(struct device *dev, |
| struct device_attribute *devattr, char *buf) |
| { |
| int index = to_sensor_dev_attr(devattr)->index; |
| struct max6697_data *data = max6697_update_device(dev); |
| int temp; |
| |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3; |
| temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5; |
| |
| return sprintf(buf, "%d\n", temp * 125); |
| } |
| |
| static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, |
| char *buf) |
| { |
| int nr = to_sensor_dev_attr_2(devattr)->nr; |
| int index = to_sensor_dev_attr_2(devattr)->index; |
| struct max6697_data *data = max6697_update_device(dev); |
| int temp; |
| |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| temp = data->temp[nr][index]; |
| temp -= data->temp_offset; |
| |
| return sprintf(buf, "%d\n", temp * 1000); |
| } |
| |
| static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| int index = to_sensor_dev_attr(attr)->index; |
| struct max6697_data *data = max6697_update_device(dev); |
| |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| if (data->chip->alarm_map) |
| index = data->chip->alarm_map[index]; |
| |
| return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1); |
| } |
| |
| static ssize_t temp_store(struct device *dev, |
| struct device_attribute *devattr, const char *buf, |
| size_t count) |
| { |
| int nr = to_sensor_dev_attr_2(devattr)->nr; |
| int index = to_sensor_dev_attr_2(devattr)->index; |
| struct max6697_data *data = dev_get_drvdata(dev); |
| long temp; |
| int ret; |
| |
| ret = kstrtol(buf, 10, &temp); |
| if (ret < 0) |
| return ret; |
| |
| mutex_lock(&data->update_lock); |
| temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset; |
| temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127); |
| data->temp[nr][index] = temp; |
| ret = i2c_smbus_write_byte_data(data->client, |
| index == 2 ? MAX6697_REG_MAX[nr] |
| : MAX6697_REG_CRIT[nr], |
| temp); |
| mutex_unlock(&data->update_lock); |
| |
| return ret < 0 ? ret : count; |
| } |
| |
| static ssize_t offset_store(struct device *dev, struct device_attribute *devattr, const char *buf, |
| size_t count) |
| { |
| int val, ret, index, select; |
| struct max6697_data *data; |
| bool channel_enabled; |
| long temp; |
| |
| index = to_sensor_dev_attr(devattr)->index; |
| data = dev_get_drvdata(dev); |
| ret = kstrtol(buf, 10, &temp); |
| if (ret < 0) |
| return ret; |
| |
| mutex_lock(&data->update_lock); |
| select = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET_SELECT); |
| if (select < 0) { |
| ret = select; |
| goto abort; |
| } |
| channel_enabled = (select & (1 << (index - 1))); |
| temp = clamp_val(temp, MAX6581_OFFSET_MIN, MAX6581_OFFSET_MAX); |
| val = DIV_ROUND_CLOSEST(temp, 250); |
| /* disable the offset for channel if the new offset is 0 */ |
| if (val == 0) { |
| if (channel_enabled) |
| ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET_SELECT, |
| select & ~(1 << (index - 1))); |
| ret = ret < 0 ? ret : count; |
| goto abort; |
| } |
| if (!channel_enabled) { |
| ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET_SELECT, |
| select | (1 << (index - 1))); |
| if (ret < 0) |
| goto abort; |
| } |
| ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET, val); |
| ret = ret < 0 ? ret : count; |
| |
| abort: |
| mutex_unlock(&data->update_lock); |
| return ret; |
| } |
| |
| static ssize_t offset_show(struct device *dev, struct device_attribute *devattr, char *buf) |
| { |
| struct max6697_data *data; |
| int select, ret, index; |
| |
| index = to_sensor_dev_attr(devattr)->index; |
| data = dev_get_drvdata(dev); |
| mutex_lock(&data->update_lock); |
| select = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET_SELECT); |
| if (select < 0) |
| ret = select; |
| else if (select & (1 << (index - 1))) |
| ret = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET); |
| else |
| ret = 0; |
| mutex_unlock(&data->update_lock); |
| return ret < 0 ? ret : sprintf(buf, "%d\n", max6581_offset_to_millic(ret)); |
| } |
| |
| static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); |
| static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0, MAX6697_TEMP_MAX); |
| static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0, MAX6697_TEMP_CRIT); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); |
| static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 1, MAX6697_TEMP_MAX); |
| static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 1, MAX6697_TEMP_CRIT); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2); |
| static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, MAX6697_TEMP_MAX); |
| static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 2, MAX6697_TEMP_CRIT); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3); |
| static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 3, MAX6697_TEMP_MAX); |
| static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 3, MAX6697_TEMP_CRIT); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4); |
| static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 4, MAX6697_TEMP_MAX); |
| static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 4, MAX6697_TEMP_CRIT); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5); |
| static SENSOR_DEVICE_ATTR_2_RW(temp6_max, temp, 5, MAX6697_TEMP_MAX); |
| static SENSOR_DEVICE_ATTR_2_RW(temp6_crit, temp, 5, MAX6697_TEMP_CRIT); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_input, 6); |
| static SENSOR_DEVICE_ATTR_2_RW(temp7_max, temp, 6, MAX6697_TEMP_MAX); |
| static SENSOR_DEVICE_ATTR_2_RW(temp7_crit, temp, 6, MAX6697_TEMP_CRIT); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_input, 7); |
| static SENSOR_DEVICE_ATTR_2_RW(temp8_max, temp, 7, MAX6697_TEMP_MAX); |
| static SENSOR_DEVICE_ATTR_2_RW(temp8_crit, temp, 7, MAX6697_TEMP_CRIT); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 22); |
| static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 16); |
| static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 17); |
| static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 18); |
| static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, 19); |
| static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, alarm, 20); |
| static SENSOR_DEVICE_ATTR_RO(temp7_max_alarm, alarm, 21); |
| static SENSOR_DEVICE_ATTR_RO(temp8_max_alarm, alarm, 23); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14); |
| static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8); |
| static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 9); |
| static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 10); |
| static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, alarm, 11); |
| static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, alarm, 12); |
| static SENSOR_DEVICE_ATTR_RO(temp7_crit_alarm, alarm, 13); |
| static SENSOR_DEVICE_ATTR_RO(temp8_crit_alarm, alarm, 15); |
| |
| static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 1); |
| static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); |
| static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 3); |
| static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, 4); |
| static SENSOR_DEVICE_ATTR_RO(temp6_fault, alarm, 5); |
| static SENSOR_DEVICE_ATTR_RO(temp7_fault, alarm, 6); |
| static SENSOR_DEVICE_ATTR_RO(temp8_fault, alarm, 7); |
| |
| /* There is no offset for local temperature so starting from temp2 */ |
| static SENSOR_DEVICE_ATTR_RW(temp2_offset, offset, 1); |
| static SENSOR_DEVICE_ATTR_RW(temp3_offset, offset, 2); |
| static SENSOR_DEVICE_ATTR_RW(temp4_offset, offset, 3); |
| static SENSOR_DEVICE_ATTR_RW(temp5_offset, offset, 4); |
| static SENSOR_DEVICE_ATTR_RW(temp6_offset, offset, 5); |
| static SENSOR_DEVICE_ATTR_RW(temp7_offset, offset, 6); |
| static SENSOR_DEVICE_ATTR_RW(temp8_offset, offset, 7); |
| |
| static DEVICE_ATTR(dummy, 0, NULL, NULL); |
| |
| static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr, |
| int index) |
| { |
| struct device *dev = kobj_to_dev(kobj); |
| struct max6697_data *data = dev_get_drvdata(dev); |
| const struct max6697_chip_data *chip = data->chip; |
| int channel = index / 7; /* channel number */ |
| int nr = index % 7; /* attribute index within channel */ |
| |
| if (channel >= chip->channels) |
| return 0; |
| |
| if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel))) |
| return 0; |
| if (nr == 5 && !(chip->have_fault & (1 << channel))) |
| return 0; |
| /* offset reg is only supported on max6581 remote channels */ |
| if (nr == 6) |
| if (data->type != max6581 || channel == 0) |
| return 0; |
| |
| return attr->mode; |
| } |
| |
| /* |
| * max6697_is_visible uses the index into the following array to determine |
| * if attributes should be created or not. Any change in order or content |
| * must be matched in max6697_is_visible. |
| */ |
| static struct attribute *max6697_attributes[] = { |
| &sensor_dev_attr_temp1_input.dev_attr.attr, |
| &sensor_dev_attr_temp1_max.dev_attr.attr, |
| &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp1_crit.dev_attr.attr, |
| &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, |
| &dev_attr_dummy.attr, |
| &dev_attr_dummy.attr, |
| |
| &sensor_dev_attr_temp2_input.dev_attr.attr, |
| &sensor_dev_attr_temp2_max.dev_attr.attr, |
| &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp2_crit.dev_attr.attr, |
| &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp2_fault.dev_attr.attr, |
| &sensor_dev_attr_temp2_offset.dev_attr.attr, |
| |
| &sensor_dev_attr_temp3_input.dev_attr.attr, |
| &sensor_dev_attr_temp3_max.dev_attr.attr, |
| &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp3_crit.dev_attr.attr, |
| &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp3_fault.dev_attr.attr, |
| &sensor_dev_attr_temp3_offset.dev_attr.attr, |
| |
| &sensor_dev_attr_temp4_input.dev_attr.attr, |
| &sensor_dev_attr_temp4_max.dev_attr.attr, |
| &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp4_crit.dev_attr.attr, |
| &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp4_fault.dev_attr.attr, |
| &sensor_dev_attr_temp4_offset.dev_attr.attr, |
| |
| &sensor_dev_attr_temp5_input.dev_attr.attr, |
| &sensor_dev_attr_temp5_max.dev_attr.attr, |
| &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp5_crit.dev_attr.attr, |
| &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp5_fault.dev_attr.attr, |
| &sensor_dev_attr_temp5_offset.dev_attr.attr, |
| |
| &sensor_dev_attr_temp6_input.dev_attr.attr, |
| &sensor_dev_attr_temp6_max.dev_attr.attr, |
| &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp6_crit.dev_attr.attr, |
| &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp6_fault.dev_attr.attr, |
| &sensor_dev_attr_temp6_offset.dev_attr.attr, |
| |
| &sensor_dev_attr_temp7_input.dev_attr.attr, |
| &sensor_dev_attr_temp7_max.dev_attr.attr, |
| &sensor_dev_attr_temp7_max_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp7_crit.dev_attr.attr, |
| &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp7_fault.dev_attr.attr, |
| &sensor_dev_attr_temp7_offset.dev_attr.attr, |
| |
| &sensor_dev_attr_temp8_input.dev_attr.attr, |
| &sensor_dev_attr_temp8_max.dev_attr.attr, |
| &sensor_dev_attr_temp8_max_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp8_crit.dev_attr.attr, |
| &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr, |
| &sensor_dev_attr_temp8_fault.dev_attr.attr, |
| &sensor_dev_attr_temp8_offset.dev_attr.attr, |
| NULL |
| }; |
| |
| static const struct attribute_group max6697_group = { |
| .attrs = max6697_attributes, .is_visible = max6697_is_visible, |
| }; |
| __ATTRIBUTE_GROUPS(max6697); |
| |
| static void max6697_get_config_of(struct device_node *node, |
| struct max6697_platform_data *pdata) |
| { |
| int len; |
| const __be32 *prop; |
| |
| pdata->smbus_timeout_disable = |
| of_property_read_bool(node, "smbus-timeout-disable"); |
| pdata->extended_range_enable = |
| of_property_read_bool(node, "extended-range-enable"); |
| pdata->beta_compensation = |
| of_property_read_bool(node, "beta-compensation-enable"); |
| |
| prop = of_get_property(node, "alert-mask", &len); |
| if (prop && len == sizeof(u32)) |
| pdata->alert_mask = be32_to_cpu(prop[0]); |
| prop = of_get_property(node, "over-temperature-mask", &len); |
| if (prop && len == sizeof(u32)) |
| pdata->over_temperature_mask = be32_to_cpu(prop[0]); |
| prop = of_get_property(node, "resistance-cancellation", &len); |
| if (prop) { |
| if (len == sizeof(u32)) |
| pdata->resistance_cancellation = be32_to_cpu(prop[0]); |
| else |
| pdata->resistance_cancellation = 0xfe; |
| } |
| prop = of_get_property(node, "transistor-ideality", &len); |
| if (prop && len == 2 * sizeof(u32)) { |
| pdata->ideality_mask = be32_to_cpu(prop[0]); |
| pdata->ideality_value = be32_to_cpu(prop[1]); |
| } |
| } |
| |
| static int max6697_init_chip(struct max6697_data *data, |
| struct i2c_client *client) |
| { |
| struct max6697_platform_data *pdata = dev_get_platdata(&client->dev); |
| struct max6697_platform_data p; |
| const struct max6697_chip_data *chip = data->chip; |
| int factor = chip->channels; |
| int ret, reg; |
| |
| /* |
| * Don't touch configuration if neither platform data nor OF |
| * configuration was specified. If that is the case, use the |
| * current chip configuration. |
| */ |
| if (!pdata && !client->dev.of_node) { |
| reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG); |
| if (reg < 0) |
| return reg; |
| if (data->type == max6581) { |
| if (reg & MAX6581_CONF_EXTENDED) |
| data->temp_offset = 64; |
| reg = i2c_smbus_read_byte_data(client, |
| MAX6581_REG_RESISTANCE); |
| if (reg < 0) |
| return reg; |
| factor += hweight8(reg); |
| } else { |
| if (reg & MAX6697_CONF_RESISTANCE) |
| factor++; |
| } |
| goto done; |
| } |
| |
| if (client->dev.of_node) { |
| memset(&p, 0, sizeof(p)); |
| max6697_get_config_of(client->dev.of_node, &p); |
| pdata = &p; |
| } |
| |
| reg = 0; |
| if (pdata->smbus_timeout_disable && |
| (chip->valid_conf & MAX6697_CONF_TIMEOUT)) { |
| reg |= MAX6697_CONF_TIMEOUT; |
| } |
| if (pdata->extended_range_enable && |
| (chip->valid_conf & MAX6581_CONF_EXTENDED)) { |
| reg |= MAX6581_CONF_EXTENDED; |
| data->temp_offset = 64; |
| } |
| if (pdata->resistance_cancellation && |
| (chip->valid_conf & MAX6697_CONF_RESISTANCE)) { |
| reg |= MAX6697_CONF_RESISTANCE; |
| factor++; |
| } |
| if (pdata->beta_compensation && |
| (chip->valid_conf & MAX6693_CONF_BETA)) { |
| reg |= MAX6693_CONF_BETA; |
| } |
| |
| ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg); |
| if (ret < 0) |
| return ret; |
| |
| ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, |
| MAX6697_ALERT_MAP_BITS(pdata->alert_mask)); |
| if (ret < 0) |
| return ret; |
| |
| ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, |
| MAX6697_OVERT_MAP_BITS(pdata->over_temperature_mask)); |
| if (ret < 0) |
| return ret; |
| |
| if (data->type == max6581) { |
| factor += hweight8(pdata->resistance_cancellation >> 1); |
| ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE, |
| pdata->resistance_cancellation >> 1); |
| if (ret < 0) |
| return ret; |
| ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, |
| pdata->ideality_value); |
| if (ret < 0) |
| return ret; |
| ret = i2c_smbus_write_byte_data(client, |
| MAX6581_REG_IDEALITY_SELECT, |
| pdata->ideality_mask >> 1); |
| if (ret < 0) |
| return ret; |
| } |
| done: |
| data->update_interval = factor * MAX6697_CONV_TIME; |
| return 0; |
| } |
| |
| static const struct i2c_device_id max6697_id[]; |
| |
| static int max6697_probe(struct i2c_client *client) |
| { |
| struct i2c_adapter *adapter = client->adapter; |
| struct device *dev = &client->dev; |
| struct max6697_data *data; |
| struct device *hwmon_dev; |
| int err; |
| |
| if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| return -ENODEV; |
| |
| data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| if (client->dev.of_node) |
| data->type = (enum chips)of_device_get_match_data(&client->dev); |
| else |
| data->type = i2c_match_id(max6697_id, client)->driver_data; |
| data->chip = &max6697_chip_data[data->type]; |
| data->client = client; |
| mutex_init(&data->update_lock); |
| |
| err = max6697_init_chip(data, client); |
| if (err) |
| return err; |
| |
| hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
| data, |
| max6697_groups); |
| return PTR_ERR_OR_ZERO(hwmon_dev); |
| } |
| |
| static const struct i2c_device_id max6697_id[] = { |
| { "max6581", max6581 }, |
| { "max6602", max6602 }, |
| { "max6622", max6622 }, |
| { "max6636", max6636 }, |
| { "max6689", max6689 }, |
| { "max6693", max6693 }, |
| { "max6694", max6694 }, |
| { "max6697", max6697 }, |
| { "max6698", max6698 }, |
| { "max6699", max6699 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, max6697_id); |
| |
| static const struct of_device_id __maybe_unused max6697_of_match[] = { |
| { |
| .compatible = "maxim,max6581", |
| .data = (void *)max6581 |
| }, |
| { |
| .compatible = "maxim,max6602", |
| .data = (void *)max6602 |
| }, |
| { |
| .compatible = "maxim,max6622", |
| .data = (void *)max6622 |
| }, |
| { |
| .compatible = "maxim,max6636", |
| .data = (void *)max6636 |
| }, |
| { |
| .compatible = "maxim,max6689", |
| .data = (void *)max6689 |
| }, |
| { |
| .compatible = "maxim,max6693", |
| .data = (void *)max6693 |
| }, |
| { |
| .compatible = "maxim,max6694", |
| .data = (void *)max6694 |
| }, |
| { |
| .compatible = "maxim,max6697", |
| .data = (void *)max6697 |
| }, |
| { |
| .compatible = "maxim,max6698", |
| .data = (void *)max6698 |
| }, |
| { |
| .compatible = "maxim,max6699", |
| .data = (void *)max6699 |
| }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, max6697_of_match); |
| |
| static struct i2c_driver max6697_driver = { |
| .class = I2C_CLASS_HWMON, |
| .driver = { |
| .name = "max6697", |
| .of_match_table = of_match_ptr(max6697_of_match), |
| }, |
| .probe_new = max6697_probe, |
| .id_table = max6697_id, |
| }; |
| |
| module_i2c_driver(max6697_driver); |
| |
| MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); |
| MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); |
| MODULE_LICENSE("GPL"); |
