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hwmon: (lm90) Add support for additional chip revision of NCT1008

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The NCT1008 datasheet, Revision 3, states that its chip revision is
0x57. This matches the ADT7461A chip revision, and NCT1008 is therefore
detected as ADT7461A. In revision 6 of the datasheet, the chip revision
register is no longer documented. Multiple samples of NCT1008 were found
to report a chip revision of 0x54. As it turns out, one of the patches
submitted to add NCT1008 support to the lm90 driver already included a
check for chip revision 0x54. Unfortunately, that patch never made it into
the kernel. Remedy the situation and explicitly detect chips with revision
0x54 as NCT1008.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2021-12-20 17:02:36 -08:00
parent c7cebce984
commit d277fbd53d
1 changed files with 6 additions and 1 deletions
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7
drivers/hwmon/lm90.c
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@ -1558,7 +1558,12 @@ static const char *lm90_detect_analog(struct i2c_client *client, int chip_id,
convrate <= 0x0a)
name = "adt7461";
break;
case 0x57: /* ADT7461A, NCT1008 */
case 0x54: /* NCT1008 */
if ((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) &&
convrate <= 0x0a)
name = "adt7461a";