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hwmon: (lm90) Strengthen chip detection for ADM1032, ADT7461(A), and NCT1008

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ADT7461A and NCT1008 support the undocumented manufacturer and chip ID
registers at 0x3e and 0x3f, and return 0x61 as chip ID. ADM1032 and
ADT7461 do not support those registers but return 0 when reading them.
Use this information to improve the accuracy of the chip detection code.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2021-12-10 19:35:20 -08:00
parent a9f3d3a80a
commit 9888775be8
1 changed files with 8 additions and 4 deletions
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12
drivers/hwmon/lm90.c
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@ -1605,22 +1605,26 @@ static const char *lm90_detect_analog(struct i2c_client *client, int chip_id,
switch (chip_id) {
case 0x40 ... 0x4f: /* ADM1032 */
if ((address == 0x4c || address == 0x4d) && !(config1 & 0x3f) &&
if (man_id2 == 0x00 && chip_id2 == 0x00 &&
(address == 0x4c || address == 0x4d) && !(config1 & 0x3f) &&
convrate <= 0x0a)
name = "adm1032";
break;
case 0x51: /* ADT7461 */
if ((address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
if (man_id2 == 0x00 && chip_id2 == 0x00 &&
(address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
convrate <= 0x0a)
name = "adt7461";
break;
case 0x54: /* NCT1008 */
if ((address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
if (man_id2 == 0x41 && chip_id2 == 0x61 &&
(address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
convrate <= 0x0a)
name = "nct1008";
break;
case 0x57: /* ADT7461A, NCT1008 (datasheet rev. 3) */
if ((address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
if (man_id2 == 0x41 && chip_id2 == 0x61 &&
(address == 0x4c || address == 0x4d) && !(config1 & 0x1b) &&
convrate <= 0x0a)
name = "adt7461a";
break;