diff options
Diffstat (limited to 'drivers/hwmon/tmp401.c')
-rw-r--r-- | drivers/hwmon/tmp401.c | 173 |
1 files changed, 149 insertions, 24 deletions
diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c index 49932de..7b34f2c 100644 --- a/drivers/hwmon/tmp401.c +++ b/drivers/hwmon/tmp401.c @@ -1,6 +1,9 @@ /* tmp401.c * * Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com> + * Preliminary tmp411 support by: + * Gabriel Konat, Sander Leget, Wouter Willems + * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -40,8 +43,7 @@ static const unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END }; /* Insmod parameters */ -I2C_CLIENT_INSMOD_1(tmp401); - +I2C_CLIENT_INSMOD_2(tmp401, tmp411); /* * The TMP401 registers, note some registers have different addresses for @@ -56,6 +58,7 @@ I2C_CLIENT_INSMOD_1(tmp401); #define TMP401_CONSECUTIVE_ALERT 0x22 #define TMP401_MANUFACTURER_ID_REG 0xFE #define TMP401_DEVICE_ID_REG 0xFF +#define TMP411_N_FACTOR_REG 0x18 static const u8 TMP401_TEMP_MSB[2] = { 0x00, 0x01 }; static const u8 TMP401_TEMP_LSB[2] = { 0x15, 0x10 }; @@ -68,6 +71,11 @@ static const u8 TMP401_TEMP_HIGH_LIMIT_LSB[2] = { 0x16, 0x13 }; /* These are called the THERM limit / hysteresis / mask in the datasheet */ static const u8 TMP401_TEMP_CRIT_LIMIT[2] = { 0x20, 0x19 }; +static const u8 TMP411_TEMP_LOWEST_MSB[2] = { 0x30, 0x34 }; +static const u8 TMP411_TEMP_LOWEST_LSB[2] = { 0x31, 0x35 }; +static const u8 TMP411_TEMP_HIGHEST_MSB[2] = { 0x32, 0x36 }; +static const u8 TMP411_TEMP_HIGHEST_LSB[2] = { 0x33, 0x37 }; + /* Flags */ #define TMP401_CONFIG_RANGE 0x04 #define TMP401_CONFIG_SHUTDOWN 0x40 @@ -82,6 +90,7 @@ static const u8 TMP401_TEMP_CRIT_LIMIT[2] = { 0x20, 0x19 }; /* Manufacturer / Device ID's */ #define TMP401_MANUFACTURER_ID 0x55 #define TMP401_DEVICE_ID 0x11 +#define TMP411_DEVICE_ID 0x12 /* * Functions declarations @@ -100,6 +109,7 @@ static struct tmp401_data *tmp401_update_device(struct device *dev); static const struct i2c_device_id tmp401_id[] = { { "tmp401", tmp401 }, + { "tmp411", tmp411 }, { } }; MODULE_DEVICE_TABLE(i2c, tmp401_id); @@ -125,6 +135,7 @@ struct tmp401_data { struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ + int kind; /* register values */ u8 status; @@ -134,6 +145,8 @@ struct tmp401_data { u16 temp_high[2]; u8 temp_crit[2]; u8 temp_crit_hyst; + u16 temp_lowest[2]; + u16 temp_highest[2]; }; /* @@ -238,6 +251,28 @@ static ssize_t show_temp_crit_hyst(struct device *dev, return sprintf(buf, "%d\n", temp); } +static ssize_t show_temp_lowest(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + int index = to_sensor_dev_attr(devattr)->index; + struct tmp401_data *data = tmp401_update_device(dev); + + return sprintf(buf, "%d\n", + tmp401_register_to_temp(data->temp_lowest[index], + data->config)); +} + +static ssize_t show_temp_highest(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + int index = to_sensor_dev_attr(devattr)->index; + struct tmp401_data *data = tmp401_update_device(dev); + + return sprintf(buf, "%d\n", + tmp401_register_to_temp(data->temp_highest[index], + data->config)); +} + static ssize_t show_status(struct device *dev, struct device_attribute *devattr, char *buf) { @@ -361,6 +396,30 @@ static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute return count; } +/* + * Resets the historical measurements of minimum and maximum temperatures. + * This is done by writing any value to any of the minimum/maximum registers + * (0x30-0x37). + */ +static ssize_t reset_temp_history(struct device *dev, + struct device_attribute *devattr, const char *buf, size_t count) +{ + long val; + + if (strict_strtol(buf, 10, &val)) + return -EINVAL; + + if (val != 1) { + dev_err(dev, "temp_reset_history value %ld not" + " supported. Use 1 to reset the history!\n", val); + return -EINVAL; + } + i2c_smbus_write_byte_data(to_i2c_client(dev), + TMP411_TEMP_LOWEST_MSB[0], val); + + return count; +} + static struct sensor_device_attribute tmp401_attr[] = { SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0), SENSOR_ATTR(temp1_min, 0644, show_temp_min, store_temp_min, 0), @@ -390,6 +449,21 @@ static struct sensor_device_attribute tmp401_attr[] = { }; /* + * Additional features of the TMP411 chip. + * The TMP411 stores the minimum and maximum + * temperature measured since power-on, chip-reset, or + * minimum and maximum register reset for both the local + * and remote channels. + */ +static struct sensor_device_attribute tmp411_attr[] = { + SENSOR_ATTR(temp1_highest, 0444, show_temp_highest, NULL, 0), + SENSOR_ATTR(temp1_lowest, 0444, show_temp_lowest, NULL, 0), + SENSOR_ATTR(temp2_highest, 0444, show_temp_highest, NULL, 1), + SENSOR_ATTR(temp2_lowest, 0444, show_temp_lowest, NULL, 1), + SENSOR_ATTR(temp_reset_history, 0200, NULL, reset_temp_history, 0), +}; + +/* * Begin non sysfs callback code (aka Real code) */ @@ -432,8 +506,17 @@ static int tmp401_detect(struct i2c_client *client, int kind, return -ENODEV; reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG); - if (reg != TMP401_DEVICE_ID) + + switch (reg) { + case TMP401_DEVICE_ID: + kind = tmp401; + break; + case TMP411_DEVICE_ID: + kind = tmp411; + break; + default: return -ENODEV; + } reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); if (reg & 0x1b) @@ -441,10 +524,11 @@ static int tmp401_detect(struct i2c_client *client, int kind, reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ); + /* Datasheet says: 0x1-0x6 */ if (reg > 15) return -ENODEV; } - strlcpy(info->type, "tmp401", I2C_NAME_SIZE); + strlcpy(info->type, tmp401_id[kind - 1].name, I2C_NAME_SIZE); return 0; } @@ -454,6 +538,7 @@ static int tmp401_probe(struct i2c_client *client, { int i, err = 0; struct tmp401_data *data; + const char *names[] = { "TMP401", "TMP411" }; data = kzalloc(sizeof(struct tmp401_data), GFP_KERNEL); if (!data) @@ -461,6 +546,7 @@ static int tmp401_probe(struct i2c_client *client, i2c_set_clientdata(client, data); mutex_init(&data->update_lock); + data->kind = id->driver_data; /* Initialize the TMP401 chip */ tmp401_init_client(client); @@ -473,6 +559,16 @@ static int tmp401_probe(struct i2c_client *client, goto exit_remove; } + /* Register aditional tmp411 sysfs hooks */ + if (data->kind == tmp411) { + for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) { + err = device_create_file(&client->dev, + &tmp411_attr[i].dev_attr); + if (err) + goto exit_remove; + } + } + data->hwmon_dev = hwmon_device_register(&client->dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); @@ -480,7 +576,8 @@ static int tmp401_probe(struct i2c_client *client, goto exit_remove; } - dev_info(&client->dev, "Detected TI TMP401 chip\n"); + dev_info(&client->dev, "Detected TI %s chip\n", + names[data->kind - 1]); return 0; @@ -500,15 +597,60 @@ static int tmp401_remove(struct i2c_client *client) for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) device_remove_file(&client->dev, &tmp401_attr[i].dev_attr); + if (data->kind == tmp411) { + for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) + device_remove_file(&client->dev, + &tmp411_attr[i].dev_attr); + } + kfree(data); return 0; } +static struct tmp401_data *tmp401_update_device_reg16( + struct i2c_client *client, struct tmp401_data *data) +{ + int i; + + for (i = 0; i < 2; i++) { + /* + * High byte must be read first immediately followed + * by the low byte + */ + data->temp[i] = i2c_smbus_read_byte_data(client, + TMP401_TEMP_MSB[i]) << 8; + data->temp[i] |= i2c_smbus_read_byte_data(client, + TMP401_TEMP_LSB[i]); + data->temp_low[i] = i2c_smbus_read_byte_data(client, + TMP401_TEMP_LOW_LIMIT_MSB_READ[i]) << 8; + data->temp_low[i] |= i2c_smbus_read_byte_data(client, + TMP401_TEMP_LOW_LIMIT_LSB[i]); + data->temp_high[i] = i2c_smbus_read_byte_data(client, + TMP401_TEMP_HIGH_LIMIT_MSB_READ[i]) << 8; + data->temp_high[i] |= i2c_smbus_read_byte_data(client, + TMP401_TEMP_HIGH_LIMIT_LSB[i]); + data->temp_crit[i] = i2c_smbus_read_byte_data(client, + TMP401_TEMP_CRIT_LIMIT[i]); + + if (data->kind == tmp411) { + data->temp_lowest[i] = i2c_smbus_read_byte_data(client, + TMP411_TEMP_LOWEST_MSB[i]) << 8; + data->temp_lowest[i] |= i2c_smbus_read_byte_data( + client, TMP411_TEMP_LOWEST_LSB[i]); + + data->temp_highest[i] = i2c_smbus_read_byte_data( + client, TMP411_TEMP_HIGHEST_MSB[i]) << 8; + data->temp_highest[i] |= i2c_smbus_read_byte_data( + client, TMP411_TEMP_HIGHEST_LSB[i]); + } + } + return data; +} + static struct tmp401_data *tmp401_update_device(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct tmp401_data *data = i2c_get_clientdata(client); - int i; mutex_lock(&data->update_lock); @@ -516,24 +658,7 @@ static struct tmp401_data *tmp401_update_device(struct device *dev) data->status = i2c_smbus_read_byte_data(client, TMP401_STATUS); data->config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); - for (i = 0; i < 2; i++) { - /* High byte must be read first immediately followed - by the low byte */ - data->temp[i] = i2c_smbus_read_byte_data(client, - TMP401_TEMP_MSB[i]) << 8; - data->temp[i] |= i2c_smbus_read_byte_data(client, - TMP401_TEMP_LSB[i]); - data->temp_low[i] = i2c_smbus_read_byte_data(client, - TMP401_TEMP_LOW_LIMIT_MSB_READ[i]) << 8; - data->temp_low[i] |= i2c_smbus_read_byte_data(client, - TMP401_TEMP_LOW_LIMIT_LSB[i]); - data->temp_high[i] = i2c_smbus_read_byte_data(client, - TMP401_TEMP_HIGH_LIMIT_MSB_READ[i]) << 8; - data->temp_high[i] |= i2c_smbus_read_byte_data(client, - TMP401_TEMP_HIGH_LIMIT_LSB[i]); - data->temp_crit[i] = i2c_smbus_read_byte_data(client, - TMP401_TEMP_CRIT_LIMIT[i]); - } + tmp401_update_device_reg16(client, data); data->temp_crit_hyst = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST); |