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hwmon: (emc1403) Add EMC1423 support 

EMC1423 uses the similar register and adds a hardware shutdown pin to
protect exceed temperature. This function is set by resistor; it's not
necessary to do anything in the driver except add the emc1423 pid of 0x23.

Signed-off-by: Jekyll Lai <jekyll_lai@wistron.com>
[Updated Kconfig/comments and minor further changes asked for by the hwmon
 maintainers]
Signed-off-by: Alan Cox <alan@linux.intel.com>
[Fixed checkpatch warning]
Signed-of--by: Jean Delvare <khali@linux-fr.org>
wifi-calibration
Jekyll Lai 2011-01-12 21:55:12 +01:00 committed by Jean Delvare
parent 3ea1bd58b9
commit 7a1b76f2a4
2 changed files with 14 additions and 6 deletions
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4
drivers/hwmon/Kconfig
View File

@ -809,10 +809,10 @@ config SENSORS_DME1737
will be called dme1737.
config SENSORS_EMC1403
tristate "SMSC EMC1403 thermal sensor"
tristate "SMSC EMC1403/23 thermal sensor"
depends on I2C
help
If you say yes here you get support for the SMSC EMC1403
If you say yes here you get support for the SMSC EMC1403/23
temperature monitoring chip.
Threshold values can be configured using sysfs.

16
drivers/hwmon/emc1403.c
View File

@ -269,23 +269,30 @@ static int emc1403_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
int id;
/* Check if thermal chip is SMSC and EMC1403 */
/* 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 0x21:
strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
break;
case 0x23:
strlcpy(info->type, "emc1423", I2C_NAME_SIZE);
break;
/* Note: 0x25 is the 1404 which is very similar and this
driver could be extended */
id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
if (id != 0x21)
default:
return -ENODEV;
}
id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
if (id != 0x01)
return -ENODEV;
strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
return 0;
}
@ -342,6 +349,7 @@ static const unsigned short emc1403_address_list[] = {
static const struct i2c_device_id emc1403_idtable[] = {
{ "emc1403", 0 },
{ "emc1423", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, emc1403_idtable);