| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Guenter Roeck | 3562 | 81.66% | 8 | 44.44% |
| Chu Lin | 589 | 13.50% | 2 | 11.11% |
| Javier Martinez Canillas | 193 | 4.42% | 1 | 5.56% |
| Axel Lin | 8 | 0.18% | 1 | 5.56% |
| Vivien Didelot | 4 | 0.09% | 1 | 5.56% |
| Thomas Gleixner | 2 | 0.05% | 1 | 5.56% |
| Uwe Kleine-König | 1 | 0.02% | 1 | 5.56% |
| Krzysztof Kozlowski | 1 | 0.02% | 1 | 5.56% |
| Andrew F. Davis | 1 | 0.02% | 1 | 5.56% |
| Fengguang Wu | 1 | 0.02% | 1 | 5.56% |
| Total | 4362 | 18 |
// 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.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 = clamp_val(temp, -1000000, 1000000); /* prevent underflow */ 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, 15); 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, 14); 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 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; data->type = (uintptr_t)i2c_get_match_data(client); 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 = { .driver = { .name = "max6697", .of_match_table = of_match_ptr(max6697_of_match), }, .probe = 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");
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