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Commit 7a1b76f2 authored by Jekyll Lai's avatar Jekyll Lai Committed by Jean Delvare
Browse files

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: default avatarJekyll Lai <jekyll_lai@wistron.com>
[Updated Kconfig/comments and minor further changes asked for by the hwmon
 maintainers]
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
[Fixed checkpatch warning]
Signed-of--by: default avatarJean Delvare <khali@linux-fr.org>
parent 3ea1bd58

drivers/hwmon/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -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.

drivers/hwmon/emc1403.c

+12 −4
Original line number Diff line number Diff line
@@ -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);