| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Guenter Roeck | 3879 | 99.85% | 4 | 57.14% |
| Julia Lawall | 3 | 0.08% | 1 | 14.29% |
| Thomas Gleixner | 2 | 0.05% | 1 | 14.29% |
| Fengguang Wu | 1 | 0.03% | 1 | 14.29% |
| Total | 3885 | 7 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for Texas Instruments / National Semiconductor LM95234 * * Copyright (c) 2013, 2014 Guenter Roeck <linux@roeck-us.net> * * Derived from lm95241.c * Copyright (C) 2008, 2010 Davide Rizzo <elpa.rizzo@gmail.com> */ #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/sysfs.h> #define DRVNAME "lm95234" enum chips { lm95233, lm95234 }; static const unsigned short normal_i2c[] = { 0x18, 0x2a, 0x2b, 0x4d, 0x4e, I2C_CLIENT_END }; /* LM95234 registers */ #define LM95234_REG_MAN_ID 0xFE #define LM95234_REG_CHIP_ID 0xFF #define LM95234_REG_STATUS 0x02 #define LM95234_REG_CONFIG 0x03 #define LM95234_REG_CONVRATE 0x04 #define LM95234_REG_STS_FAULT 0x07 #define LM95234_REG_STS_TCRIT1 0x08 #define LM95234_REG_STS_TCRIT2 0x09 #define LM95234_REG_TEMPH(x) ((x) + 0x10) #define LM95234_REG_TEMPL(x) ((x) + 0x20) #define LM95234_REG_UTEMPH(x) ((x) + 0x19) /* Remote only */ #define LM95234_REG_UTEMPL(x) ((x) + 0x29) #define LM95234_REG_REM_MODEL 0x30 #define LM95234_REG_REM_MODEL_STS 0x38 #define LM95234_REG_OFFSET(x) ((x) + 0x31) /* Remote only */ #define LM95234_REG_TCRIT1(x) ((x) + 0x40) #define LM95234_REG_TCRIT2(x) ((x) + 0x49) /* Remote channel 1,2 */ #define LM95234_REG_TCRIT_HYST 0x5a #define NATSEMI_MAN_ID 0x01 #define LM95233_CHIP_ID 0x89 #define LM95234_CHIP_ID 0x79 /* Client data (each client gets its own) */ struct lm95234_data { struct i2c_client *client; const struct attribute_group *groups[3]; struct mutex update_lock; unsigned long last_updated, interval; /* in jiffies */ bool valid; /* false until following fields are valid */ /* registers values */ int temp[5]; /* temperature (signed) */ u32 status; /* fault/alarm status */ u8 tcrit1[5]; /* critical temperature limit */ u8 tcrit2[2]; /* high temperature limit */ s8 toffset[4]; /* remote temperature offset */ u8 thyst; /* common hysteresis */ u8 sensor_type; /* temperature sensor type */ }; static int lm95234_read_temp(struct i2c_client *client, int index, int *t) { int val; u16 temp = 0; if (index) { val = i2c_smbus_read_byte_data(client, LM95234_REG_UTEMPH(index - 1)); if (val < 0) return val; temp = val << 8; val = i2c_smbus_read_byte_data(client, LM95234_REG_UTEMPL(index - 1)); if (val < 0) return val; temp |= val; *t = temp; } /* * Read signed temperature if unsigned temperature is 0, * or if this is the local sensor. */ if (!temp) { val = i2c_smbus_read_byte_data(client, LM95234_REG_TEMPH(index)); if (val < 0) return val; temp = val << 8; val = i2c_smbus_read_byte_data(client, LM95234_REG_TEMPL(index)); if (val < 0) return val; temp |= val; *t = (s16)temp; } return 0; } static u16 update_intervals[] = { 143, 364, 1000, 2500 }; /* Fill value cache. Must be called with update lock held. */ static int lm95234_fill_cache(struct lm95234_data *data, struct i2c_client *client) { int i, ret; ret = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); if (ret < 0) return ret; data->interval = msecs_to_jiffies(update_intervals[ret & 0x03]); for (i = 0; i < ARRAY_SIZE(data->tcrit1); i++) { ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT1(i)); if (ret < 0) return ret; data->tcrit1[i] = ret; } for (i = 0; i < ARRAY_SIZE(data->tcrit2); i++) { ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT2(i)); if (ret < 0) return ret; data->tcrit2[i] = ret; } for (i = 0; i < ARRAY_SIZE(data->toffset); i++) { ret = i2c_smbus_read_byte_data(client, LM95234_REG_OFFSET(i)); if (ret < 0) return ret; data->toffset[i] = ret; } ret = i2c_smbus_read_byte_data(client, LM95234_REG_TCRIT_HYST); if (ret < 0) return ret; data->thyst = ret; ret = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); if (ret < 0) return ret; data->sensor_type = ret; return 0; } static int lm95234_update_device(struct lm95234_data *data) { struct i2c_client *client = data->client; int ret; mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + data->interval) || !data->valid) { int i; if (!data->valid) { ret = lm95234_fill_cache(data, client); if (ret < 0) goto abort; } data->valid = false; for (i = 0; i < ARRAY_SIZE(data->temp); i++) { ret = lm95234_read_temp(client, i, &data->temp[i]); if (ret < 0) goto abort; } ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_FAULT); if (ret < 0) goto abort; data->status = ret; ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT1); if (ret < 0) goto abort; data->status |= ret << 8; ret = i2c_smbus_read_byte_data(client, LM95234_REG_STS_TCRIT2); if (ret < 0) goto abort; data->status |= ret << 16; data->last_updated = jiffies; data->valid = true; } ret = 0; abort: mutex_unlock(&data->update_lock); return ret; } static ssize_t temp_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); if (ret) return ret; return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(data->temp[index] * 125, 32)); } static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95234_data *data = dev_get_drvdata(dev); u32 mask = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); if (ret) return ret; return sprintf(buf, "%u", !!(data->status & mask)); } static ssize_t type_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95234_data *data = dev_get_drvdata(dev); u8 mask = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); if (ret) return ret; return sprintf(buf, data->sensor_type & mask ? "1\n" : "2\n"); } static ssize_t type_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct lm95234_data *data = dev_get_drvdata(dev); unsigned long val; u8 mask = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); if (ret) return ret; ret = kstrtoul(buf, 10, &val); if (ret < 0) return ret; if (val != 1 && val != 2) return -EINVAL; mutex_lock(&data->update_lock); if (val == 1) data->sensor_type |= mask; else data->sensor_type &= ~mask; data->valid = false; i2c_smbus_write_byte_data(data->client, LM95234_REG_REM_MODEL, data->sensor_type); mutex_unlock(&data->update_lock); return count; } static ssize_t tcrit2_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); if (ret) return ret; return sprintf(buf, "%u", data->tcrit2[index] * 1000); } static ssize_t tcrit2_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; long val; int ret = lm95234_update_device(data); if (ret) return ret; ret = kstrtol(buf, 10, &val); if (ret < 0) return ret; val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, index ? 255 : 127); mutex_lock(&data->update_lock); data->tcrit2[index] = val; i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT2(index), val); mutex_unlock(&data->update_lock); return count; } static ssize_t tcrit2_hyst_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); if (ret) return ret; /* Result can be negative, so be careful with unsigned operands */ return sprintf(buf, "%d", ((int)data->tcrit2[index] - (int)data->thyst) * 1000); } static ssize_t tcrit1_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; return sprintf(buf, "%u", data->tcrit1[index] * 1000); } static ssize_t tcrit1_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); long val; if (ret) return ret; ret = kstrtol(buf, 10, &val); if (ret < 0) return ret; val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 255); mutex_lock(&data->update_lock); data->tcrit1[index] = val; i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT1(index), val); mutex_unlock(&data->update_lock); return count; } static ssize_t tcrit1_hyst_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); if (ret) return ret; /* Result can be negative, so be careful with unsigned operands */ return sprintf(buf, "%d", ((int)data->tcrit1[index] - (int)data->thyst) * 1000); } static ssize_t tcrit1_hyst_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); long val; if (ret) return ret; ret = kstrtol(buf, 10, &val); if (ret < 0) return ret; val = DIV_ROUND_CLOSEST(val, 1000); val = clamp_val((int)data->tcrit1[index] - val, 0, 31); mutex_lock(&data->update_lock); data->thyst = val; i2c_smbus_write_byte_data(data->client, LM95234_REG_TCRIT_HYST, val); mutex_unlock(&data->update_lock); return count; } static ssize_t offset_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); if (ret) return ret; return sprintf(buf, "%d", data->toffset[index] * 500); } static ssize_t offset_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct lm95234_data *data = dev_get_drvdata(dev); int index = to_sensor_dev_attr(attr)->index; int ret = lm95234_update_device(data); long val; if (ret) return ret; ret = kstrtol(buf, 10, &val); if (ret < 0) return ret; /* Accuracy is 1/2 degrees C */ val = clamp_val(DIV_ROUND_CLOSEST(val, 500), -128, 127); mutex_lock(&data->update_lock); data->toffset[index] = val; i2c_smbus_write_byte_data(data->client, LM95234_REG_OFFSET(index), val); mutex_unlock(&data->update_lock); return count; } static ssize_t update_interval_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lm95234_data *data = dev_get_drvdata(dev); int ret = lm95234_update_device(data); if (ret) return ret; return sprintf(buf, "%lu\n", DIV_ROUND_CLOSEST(data->interval * 1000, HZ)); } static ssize_t update_interval_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct lm95234_data *data = dev_get_drvdata(dev); int ret = lm95234_update_device(data); unsigned long val; u8 regval; if (ret) return ret; ret = kstrtoul(buf, 10, &val); if (ret < 0) return ret; for (regval = 0; regval < 3; regval++) { if (val <= update_intervals[regval]) break; } mutex_lock(&data->update_lock); data->interval = msecs_to_jiffies(update_intervals[regval]); i2c_smbus_write_byte_data(data->client, LM95234_REG_CONVRATE, regval); mutex_unlock(&data->update_lock); return count; } static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, BIT(0) | BIT(1)); static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, BIT(2) | BIT(3)); static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, BIT(4) | BIT(5)); static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, BIT(6) | BIT(7)); static SENSOR_DEVICE_ATTR_RW(temp2_type, type, BIT(1)); static SENSOR_DEVICE_ATTR_RW(temp3_type, type, BIT(2)); static SENSOR_DEVICE_ATTR_RW(temp4_type, type, BIT(3)); static SENSOR_DEVICE_ATTR_RW(temp5_type, type, BIT(4)); static SENSOR_DEVICE_ATTR_RW(temp1_max, tcrit1, 0); static SENSOR_DEVICE_ATTR_RW(temp2_max, tcrit2, 0); static SENSOR_DEVICE_ATTR_RW(temp3_max, tcrit2, 1); static SENSOR_DEVICE_ATTR_RW(temp4_max, tcrit1, 3); static SENSOR_DEVICE_ATTR_RW(temp5_max, tcrit1, 4); static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, tcrit1_hyst, 0); static SENSOR_DEVICE_ATTR_RO(temp2_max_hyst, tcrit2_hyst, 0); static SENSOR_DEVICE_ATTR_RO(temp3_max_hyst, tcrit2_hyst, 1); static SENSOR_DEVICE_ATTR_RO(temp4_max_hyst, tcrit1_hyst, 3); static SENSOR_DEVICE_ATTR_RO(temp5_max_hyst, tcrit1_hyst, 4); static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, BIT(0 + 8)); static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, BIT(1 + 16)); static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, BIT(2 + 16)); static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, BIT(3 + 8)); static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, BIT(4 + 8)); static SENSOR_DEVICE_ATTR_RW(temp2_crit, tcrit1, 1); static SENSOR_DEVICE_ATTR_RW(temp3_crit, tcrit1, 2); static SENSOR_DEVICE_ATTR_RO(temp2_crit_hyst, tcrit1_hyst, 1); static SENSOR_DEVICE_ATTR_RO(temp3_crit_hyst, tcrit1_hyst, 2); static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, BIT(1 + 8)); static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, BIT(2 + 8)); static SENSOR_DEVICE_ATTR_RW(temp2_offset, offset, 0); static SENSOR_DEVICE_ATTR_RW(temp3_offset, offset, 1); static SENSOR_DEVICE_ATTR_RW(temp4_offset, offset, 2); static SENSOR_DEVICE_ATTR_RW(temp5_offset, offset, 3); static DEVICE_ATTR_RW(update_interval); static struct attribute *lm95234_common_attrs[] = { &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp2_fault.dev_attr.attr, &sensor_dev_attr_temp3_fault.dev_attr.attr, &sensor_dev_attr_temp2_type.dev_attr.attr, &sensor_dev_attr_temp3_type.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, &sensor_dev_attr_temp2_crit.dev_attr.attr, &sensor_dev_attr_temp3_crit.dev_attr.attr, &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp2_offset.dev_attr.attr, &sensor_dev_attr_temp3_offset.dev_attr.attr, &dev_attr_update_interval.attr, NULL }; static const struct attribute_group lm95234_common_group = { .attrs = lm95234_common_attrs, }; static struct attribute *lm95234_attrs[] = { &sensor_dev_attr_temp4_input.dev_attr.attr, &sensor_dev_attr_temp5_input.dev_attr.attr, &sensor_dev_attr_temp4_fault.dev_attr.attr, &sensor_dev_attr_temp5_fault.dev_attr.attr, &sensor_dev_attr_temp4_type.dev_attr.attr, &sensor_dev_attr_temp5_type.dev_attr.attr, &sensor_dev_attr_temp4_max.dev_attr.attr, &sensor_dev_attr_temp5_max.dev_attr.attr, &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, &sensor_dev_attr_temp4_offset.dev_attr.attr, &sensor_dev_attr_temp5_offset.dev_attr.attr, NULL }; static const struct attribute_group lm95234_group = { .attrs = lm95234_attrs, }; static int lm95234_detect(struct i2c_client *client, struct i2c_board_info *info) { struct i2c_adapter *adapter = client->adapter; int address = client->addr; u8 config_mask, model_mask; int mfg_id, chip_id, val; const char *name; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; mfg_id = i2c_smbus_read_byte_data(client, LM95234_REG_MAN_ID); if (mfg_id != NATSEMI_MAN_ID) return -ENODEV; chip_id = i2c_smbus_read_byte_data(client, LM95234_REG_CHIP_ID); switch (chip_id) { case LM95233_CHIP_ID: if (address != 0x18 && address != 0x2a && address != 0x2b) return -ENODEV; config_mask = 0xbf; model_mask = 0xf9; name = "lm95233"; break; case LM95234_CHIP_ID: if (address != 0x18 && address != 0x4d && address != 0x4e) return -ENODEV; config_mask = 0xbc; model_mask = 0xe1; name = "lm95234"; break; default: return -ENODEV; } val = i2c_smbus_read_byte_data(client, LM95234_REG_STATUS); if (val & 0x30) return -ENODEV; val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); if (val & config_mask) return -ENODEV; val = i2c_smbus_read_byte_data(client, LM95234_REG_CONVRATE); if (val & 0xfc) return -ENODEV; val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); if (val & model_mask) return -ENODEV; val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); if (val & model_mask) return -ENODEV; strlcpy(info->type, name, I2C_NAME_SIZE); return 0; } static int lm95234_init_client(struct i2c_client *client) { int val, model; /* start conversion if necessary */ val = i2c_smbus_read_byte_data(client, LM95234_REG_CONFIG); if (val < 0) return val; if (val & 0x40) i2c_smbus_write_byte_data(client, LM95234_REG_CONFIG, val & ~0x40); /* If diode type status reports an error, try to fix it */ val = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL_STS); if (val < 0) return val; model = i2c_smbus_read_byte_data(client, LM95234_REG_REM_MODEL); if (model < 0) return model; if (model & val) { dev_notice(&client->dev, "Fixing remote diode type misconfiguration (0x%x)\n", val); i2c_smbus_write_byte_data(client, LM95234_REG_REM_MODEL, model & ~val); } return 0; } static int lm95234_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct lm95234_data *data; struct device *hwmon_dev; int err; data = devm_kzalloc(dev, sizeof(struct lm95234_data), GFP_KERNEL); if (!data) return -ENOMEM; data->client = client; mutex_init(&data->update_lock); /* Initialize the LM95234 chip */ err = lm95234_init_client(client); if (err < 0) return err; data->groups[0] = &lm95234_common_group; if (id->driver_data == lm95234) data->groups[1] = &lm95234_group; hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, data, data->groups); return PTR_ERR_OR_ZERO(hwmon_dev); } /* Driver data (common to all clients) */ static const struct i2c_device_id lm95234_id[] = { { "lm95233", lm95233 }, { "lm95234", lm95234 }, { } }; MODULE_DEVICE_TABLE(i2c, lm95234_id); static struct i2c_driver lm95234_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = DRVNAME, }, .probe = lm95234_probe, .id_table = lm95234_id, .detect = lm95234_detect, .address_list = normal_i2c, }; module_i2c_driver(lm95234_driver); MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); MODULE_DESCRIPTION("LM95233/LM95234 sensor driver"); MODULE_LICENSE("GPL");
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