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Diffstat (limited to 'drivers/hwmon/tmp401.c')
-rw-r--r--drivers/hwmon/tmp401.c173
1 files changed, 149 insertions, 24 deletions
diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
index 49932de571e6..7b34f2cd08bb 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);
generated by cgit (git 2.34.1) at 2025-10-31 20:06:43 +0000