Add table with device names and known register values for supported
devices from Analog / ON Semiconductor.
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
drivers/hwmon/lm90.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 77102e0a4440..7f8397c362e8 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -1828,6 +1828,42 @@ static const char *lm90_detect_analog(struct i2c_client *client, bool common_add
if (status < 0 || config2 < 0 || man_id2 < 0 || chip_id2 < 0)
return NULL;
+ /*
+ * The following chips should be detected by this function. Known
+ * register values are listed. Registers 0x3d .. 0x3e are undocumented
+ * for most of the chips, yet appear to return a well defined value.
+ * Register 0xff is undocumented for some of the chips. Register 0x3f
+ * is undocumented for all chips, but also returns a well defined value.
+ * Values are as reported from real chips unless mentioned otherwise.
+ * The code below checks values for registers 0x3d, 0x3e, and 0xff,
+ * but not for register 0x3f.
+ *
+ * Chip Register
+ * 3d 3e 3f fe ff Notes
+ * ----------------------------------------------------------
+ * adm1020 00 00 00 41 39
+ * adm1021 00 00 00 41 03
+ * adm1021a 00 00 00 41 3c
+ * adm1023 00 00 00 41 3c same as adm1021a
+ * adm1032 00 00 00 41 42
+ *
+ * adt7421 21 41 04 41 04
+ * adt7461 00 00 00 41 51
+ * adt7461a 61 41 05 41 57
+ * adt7481 81 41 02 41 62
+ * adt7482 - - - 41 65 datasheet
+ * 82 41 05 41 75 real chip
+ * adt7483 83 41 04 41 94
+ *
+ * nct72 61 41 07 41 55
+ * nct210 00 00 00 41 3f
+ * nct214 61 41 08 41 5a
+ * nct1008 - - - 41 57 datasheet rev. 3
+ * 61 41 06 41 54 real chip
+ *
+ * nvt210 - - - 41 - datasheet
+ * nvt211 - - - 41 - datasheet
+ */
switch (chip_id) {
case 0x00 ... 0x03: /* ADM1021 */
case 0x05 ... 0x0f:
--
2.35.1
