@@ -231,6 +231,7 @@ static const struct i2c_device_id lm90_id[] = {
{ "adm1021", max1617 },
{ "adm1023", adm1023 },
{ "adm1032", adm1032 },
+ { "adt7421", adt7461a },
{ "adt7461", adt7461 },
{ "adt7461a", adt7461a },
{ "adt7481", adt7481 },
@@ -1816,11 +1817,18 @@ static const char *lm90_detect_analog(struct i2c_client *client, bool common_add
return NULL;
switch (chip_id) {
- case 0x00 ... 0x0f: /* ADM1021, undocumented */
+ case 0x00 ... 0x03: /* ADM1021 */
+ case 0x05 ... 0x0f:
if (man_id2 == 0x00 && chip_id2 == 0x00 && common_address &&
!(status & 0x03) && !(config1 & 0x3f) && !(convrate & 0xf8))
name = "adm1021";
break;
+ case 0x04: /* ADT7421 (undocumented) */
+ if (man_id2 == 0x41 && chip_id2 == 0x21 &&
+ (address == 0x4c || address == 0x4d) &&
+ (config1 & 0x0b) == 0x08 && convrate <= 0x0a)
+ name = "adt7421";
+ break;
case 0x30 ... 0x3e: /* ADM1021A, ADM1023 */
/*
* ADM1021A and compatible chips will be mis-detected as
ADT7421 is similar to ADT7461A but supports configurable Beta Compensation. Packet Error Checking (PEC) is supported but undocumented. A devicetree node is not added for the added chip since it is quite unlikely that such an old chip will ever be used in a devicetree based system. It can be added later if needed. Signed-off-by: Guenter Roeck <linux@roeck-us.net> --- drivers/hwmon/lm90.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)