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 <[email protected]>
[Updated Kconfig/comments and minor further changes asked for by the hwmon
maintainers]
Signed-off-by: Alan Cox <[email protected]>
[Fixed checkpatch warning]
Signed-of--by: Jean Delvare <[email protected]>
diff --git a/drivers/hwmon/emc1403.c b/drivers/hwmon/emc1403.c
index 8dee3f3..5dea9fa 100644
--- a/drivers/hwmon/emc1403.c
+++ b/drivers/hwmon/emc1403.c
@@ -269,23 +269,30 @@
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 struct i2c_device_id emc1403_idtable[] = {
{ "emc1403", 0 },
+ { "emc1423", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, emc1403_idtable);
