Commit 41e6d721 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (lm90) Add support for ADT7421 



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: default avatarGuenter Roeck <linux@roeck-us.net>
parent d8521f82

drivers/hwmon/lm90.c

+9 −1
Original line number Diff line number Diff line
@@ -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 },
@@ -1818,11 +1819,18 @@ 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