From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/hwmon/emc1403.c | 466 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 466 insertions(+) create mode 100644 drivers/hwmon/emc1403.c (limited to 'drivers/hwmon/emc1403.c') diff --git a/drivers/hwmon/emc1403.c b/drivers/hwmon/emc1403.c new file mode 100644 index 000000000..61d59189a --- /dev/null +++ b/drivers/hwmon/emc1403.c @@ -0,0 +1,466 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * emc1403.c - SMSC Thermal Driver + * + * Copyright (C) 2008 Intel Corp + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define THERMAL_PID_REG 0xfd +#define THERMAL_SMSC_ID_REG 0xfe +#define THERMAL_REVISION_REG 0xff + +enum emc1403_chip { emc1402, emc1403, emc1404 }; + +struct thermal_data { + struct regmap *regmap; + struct mutex mutex; + const struct attribute_group *groups[4]; +}; + +static ssize_t temp_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); + struct thermal_data *data = dev_get_drvdata(dev); + unsigned int val; + int retval; + + retval = regmap_read(data->regmap, sda->index, &val); + if (retval < 0) + return retval; + return sprintf(buf, "%d000\n", val); +} + +static ssize_t bit_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr); + struct thermal_data *data = dev_get_drvdata(dev); + unsigned int val; + int retval; + + retval = regmap_read(data->regmap, sda->nr, &val); + if (retval < 0) + return retval; + return sprintf(buf, "%d\n", !!(val & sda->index)); +} + +static ssize_t temp_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); + struct thermal_data *data = dev_get_drvdata(dev); + unsigned long val; + int retval; + + if (kstrtoul(buf, 10, &val)) + return -EINVAL; + retval = regmap_write(data->regmap, sda->index, + DIV_ROUND_CLOSEST(val, 1000)); + if (retval < 0) + return retval; + return count; +} + +static ssize_t bit_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr); + struct thermal_data *data = dev_get_drvdata(dev); + unsigned long val; + int retval; + + if (kstrtoul(buf, 10, &val)) + return -EINVAL; + + retval = regmap_update_bits(data->regmap, sda->nr, sda->index, + val ? sda->index : 0); + if (retval < 0) + return retval; + return count; +} + +static ssize_t show_hyst_common(struct device *dev, + struct device_attribute *attr, char *buf, + bool is_min) +{ + struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); + struct thermal_data *data = dev_get_drvdata(dev); + struct regmap *regmap = data->regmap; + unsigned int limit; + unsigned int hyst; + int retval; + + retval = regmap_read(regmap, sda->index, &limit); + if (retval < 0) + return retval; + + retval = regmap_read(regmap, 0x21, &hyst); + if (retval < 0) + return retval; + + return sprintf(buf, "%d000\n", is_min ? limit + hyst : limit - hyst); +} + +static ssize_t hyst_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return show_hyst_common(dev, attr, buf, false); +} + +static ssize_t min_hyst_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return show_hyst_common(dev, attr, buf, true); +} + +static ssize_t hyst_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); + struct thermal_data *data = dev_get_drvdata(dev); + struct regmap *regmap = data->regmap; + unsigned int limit; + int retval; + int hyst; + unsigned long val; + + if (kstrtoul(buf, 10, &val)) + return -EINVAL; + + mutex_lock(&data->mutex); + retval = regmap_read(regmap, sda->index, &limit); + if (retval < 0) + goto fail; + + hyst = limit * 1000 - val; + hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 255); + retval = regmap_write(regmap, 0x21, hyst); + if (retval == 0) + retval = count; +fail: + mutex_unlock(&data->mutex); + return retval; +} + +/* + * Sensors. We pass the actual i2c register to the methods. + */ + +static SENSOR_DEVICE_ATTR_RW(temp1_min, temp, 0x06); +static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, 0x05); +static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp, 0x20); +static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0x00); +static SENSOR_DEVICE_ATTR_2_RO(temp1_min_alarm, bit, 0x36, 0x01); +static SENSOR_DEVICE_ATTR_2_RO(temp1_max_alarm, bit, 0x35, 0x01); +static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, bit, 0x37, 0x01); +static SENSOR_DEVICE_ATTR_RO(temp1_min_hyst, min_hyst, 0x06); +static SENSOR_DEVICE_ATTR_RO(temp1_max_hyst, hyst, 0x05); +static SENSOR_DEVICE_ATTR_RW(temp1_crit_hyst, hyst, 0x20); + +static SENSOR_DEVICE_ATTR_RW(temp2_min, temp, 0x08); +static SENSOR_DEVICE_ATTR_RW(temp2_max, temp, 0x07); +static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp, 0x19); +static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 0x01); +static SENSOR_DEVICE_ATTR_2_RO(temp2_fault, bit, 0x1b, 0x02); +static SENSOR_DEVICE_ATTR_2_RO(temp2_min_alarm, bit, 0x36, 0x02); +static SENSOR_DEVICE_ATTR_2_RO(temp2_max_alarm, bit, 0x35, 0x02); +static SENSOR_DEVICE_ATTR_2_RO(temp2_crit_alarm, bit, 0x37, 0x02); +static SENSOR_DEVICE_ATTR_RO(temp2_min_hyst, min_hyst, 0x08); +static SENSOR_DEVICE_ATTR_RO(temp2_max_hyst, hyst, 0x07); +static SENSOR_DEVICE_ATTR_RO(temp2_crit_hyst, hyst, 0x19); + +static SENSOR_DEVICE_ATTR_RW(temp3_min, temp, 0x16); +static SENSOR_DEVICE_ATTR_RW(temp3_max, temp, 0x15); +static SENSOR_DEVICE_ATTR_RW(temp3_crit, temp, 0x1A); +static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 0x23); +static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, bit, 0x1b, 0x04); +static SENSOR_DEVICE_ATTR_2_RO(temp3_min_alarm, bit, 0x36, 0x04); +static SENSOR_DEVICE_ATTR_2_RO(temp3_max_alarm, bit, 0x35, 0x04); +static SENSOR_DEVICE_ATTR_2_RO(temp3_crit_alarm, bit, 0x37, 0x04); +static SENSOR_DEVICE_ATTR_RO(temp3_min_hyst, min_hyst, 0x16); +static SENSOR_DEVICE_ATTR_RO(temp3_max_hyst, hyst, 0x15); +static SENSOR_DEVICE_ATTR_RO(temp3_crit_hyst, hyst, 0x1A); + +static SENSOR_DEVICE_ATTR_RW(temp4_min, temp, 0x2D); +static SENSOR_DEVICE_ATTR_RW(temp4_max, temp, 0x2C); +static SENSOR_DEVICE_ATTR_RW(temp4_crit, temp, 0x30); +static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 0x2A); +static SENSOR_DEVICE_ATTR_2_RO(temp4_fault, bit, 0x1b, 0x08); +static SENSOR_DEVICE_ATTR_2_RO(temp4_min_alarm, bit, 0x36, 0x08); +static SENSOR_DEVICE_ATTR_2_RO(temp4_max_alarm, bit, 0x35, 0x08); +static SENSOR_DEVICE_ATTR_2_RO(temp4_crit_alarm, bit, 0x37, 0x08); +static SENSOR_DEVICE_ATTR_RO(temp4_min_hyst, min_hyst, 0x2D); +static SENSOR_DEVICE_ATTR_RO(temp4_max_hyst, hyst, 0x2C); +static SENSOR_DEVICE_ATTR_RO(temp4_crit_hyst, hyst, 0x30); + +static SENSOR_DEVICE_ATTR_2_RW(power_state, bit, 0x03, 0x40); + +static struct attribute *emc1402_attrs[] = { + &sensor_dev_attr_temp1_min.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp1_crit.dev_attr.attr, + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_min_hyst.dev_attr.attr, + &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, + + &sensor_dev_attr_temp2_min.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp2_crit.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_min_hyst.dev_attr.attr, + &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, + + &sensor_dev_attr_power_state.dev_attr.attr, + NULL +}; + +static const struct attribute_group emc1402_group = { + .attrs = emc1402_attrs, +}; + +static struct attribute *emc1403_attrs[] = { + &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, + + &sensor_dev_attr_temp2_fault.dev_attr.attr, + &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, + + &sensor_dev_attr_temp3_min.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp3_crit.dev_attr.attr, + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp3_fault.dev_attr.attr, + &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_min_hyst.dev_attr.attr, + &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, + NULL +}; + +static const struct attribute_group emc1403_group = { + .attrs = emc1403_attrs, +}; + +static struct attribute *emc1404_attrs[] = { + &sensor_dev_attr_temp4_min.dev_attr.attr, + &sensor_dev_attr_temp4_max.dev_attr.attr, + &sensor_dev_attr_temp4_crit.dev_attr.attr, + &sensor_dev_attr_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp4_fault.dev_attr.attr, + &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_min_hyst.dev_attr.attr, + &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, + &sensor_dev_attr_temp4_crit_hyst.dev_attr.attr, + NULL +}; + +static const struct attribute_group emc1404_group = { + .attrs = emc1404_attrs, +}; + +/* + * EMC14x2 uses a different register and different bits to report alarm and + * fault status. For simplicity, provide a separate attribute group for this + * chip series. + * Since we can not re-use the same attribute names, create a separate attribute + * array. + */ +static struct sensor_device_attribute_2 emc1402_alarms[] = { + SENSOR_ATTR_2_RO(temp1_min_alarm, bit, 0x02, 0x20), + SENSOR_ATTR_2_RO(temp1_max_alarm, bit, 0x02, 0x40), + SENSOR_ATTR_2_RO(temp1_crit_alarm, bit, 0x02, 0x01), + + SENSOR_ATTR_2_RO(temp2_fault, bit, 0x02, 0x04), + SENSOR_ATTR_2_RO(temp2_min_alarm, bit, 0x02, 0x08), + SENSOR_ATTR_2_RO(temp2_max_alarm, bit, 0x02, 0x10), + SENSOR_ATTR_2_RO(temp2_crit_alarm, bit, 0x02, 0x02), +}; + +static struct attribute *emc1402_alarm_attrs[] = { + &emc1402_alarms[0].dev_attr.attr, + &emc1402_alarms[1].dev_attr.attr, + &emc1402_alarms[2].dev_attr.attr, + &emc1402_alarms[3].dev_attr.attr, + &emc1402_alarms[4].dev_attr.attr, + &emc1402_alarms[5].dev_attr.attr, + &emc1402_alarms[6].dev_attr.attr, + NULL, +}; + +static const struct attribute_group emc1402_alarm_group = { + .attrs = emc1402_alarm_attrs, +}; + +static int emc1403_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + int id; + /* Check if thermal chip is SMSC and EMC1403 or EMC1423 */ + + id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG); + if (id != 0x5d) + return -ENODEV; + + id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG); + switch (id) { + case 0x20: + strscpy(info->type, "emc1402", I2C_NAME_SIZE); + break; + case 0x21: + strscpy(info->type, "emc1403", I2C_NAME_SIZE); + break; + case 0x22: + strscpy(info->type, "emc1422", I2C_NAME_SIZE); + break; + case 0x23: + strscpy(info->type, "emc1423", I2C_NAME_SIZE); + break; + case 0x25: + strscpy(info->type, "emc1404", I2C_NAME_SIZE); + break; + case 0x27: + strscpy(info->type, "emc1424", I2C_NAME_SIZE); + break; + default: + return -ENODEV; + } + + id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG); + if (id < 0x01 || id > 0x04) + return -ENODEV; + + return 0; +} + +static bool emc1403_regmap_is_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case 0x00: /* internal diode high byte */ + case 0x01: /* external diode 1 high byte */ + case 0x02: /* status */ + case 0x10: /* external diode 1 low byte */ + case 0x1b: /* external diode fault */ + case 0x23: /* external diode 2 high byte */ + case 0x24: /* external diode 2 low byte */ + case 0x29: /* internal diode low byte */ + case 0x2a: /* externl diode 3 high byte */ + case 0x2b: /* external diode 3 low byte */ + case 0x35: /* high limit status */ + case 0x36: /* low limit status */ + case 0x37: /* therm limit status */ + return true; + default: + return false; + } +} + +static const struct regmap_config emc1403_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .cache_type = REGCACHE_RBTREE, + .volatile_reg = emc1403_regmap_is_volatile, +}; + +static const struct i2c_device_id emc1403_idtable[]; + +static int emc1403_probe(struct i2c_client *client) +{ + struct thermal_data *data; + struct device *hwmon_dev; + const struct i2c_device_id *id = i2c_match_id(emc1403_idtable, client); + + data = devm_kzalloc(&client->dev, sizeof(struct thermal_data), + GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + data->regmap = devm_regmap_init_i2c(client, &emc1403_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + mutex_init(&data->mutex); + + switch (id->driver_data) { + case emc1404: + data->groups[2] = &emc1404_group; + fallthrough; + case emc1403: + data->groups[1] = &emc1403_group; + fallthrough; + case emc1402: + data->groups[0] = &emc1402_group; + } + + if (id->driver_data == emc1402) + data->groups[1] = &emc1402_alarm_group; + + hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev, + client->name, data, + data->groups); + if (IS_ERR(hwmon_dev)) + return PTR_ERR(hwmon_dev); + + dev_info(&client->dev, "%s Thermal chip found\n", id->name); + return 0; +} + +static const unsigned short emc1403_address_list[] = { + 0x18, 0x1c, 0x29, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END +}; + +/* Last digit of chip name indicates number of channels */ +static const struct i2c_device_id emc1403_idtable[] = { + { "emc1402", emc1402 }, + { "emc1403", emc1403 }, + { "emc1404", emc1404 }, + { "emc1412", emc1402 }, + { "emc1413", emc1403 }, + { "emc1414", emc1404 }, + { "emc1422", emc1402 }, + { "emc1423", emc1403 }, + { "emc1424", emc1404 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, emc1403_idtable); + +static struct i2c_driver sensor_emc1403 = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "emc1403", + }, + .detect = emc1403_detect, + .probe_new = emc1403_probe, + .id_table = emc1403_idtable, + .address_list = emc1403_address_list, +}; + +module_i2c_driver(sensor_emc1403); + +MODULE_AUTHOR("Kalhan Trisal