hwmon: (pmbus/ibm-cffps) Use MFR_ID to choose version

There are multiple power supplies that will indicate
CFFPS_CCIN_VERSION_1, use the manufacturer ID to determine if it should
be treated as version cffps1 or version cffps2.

Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
Link: https://lore.kernel.org/r/20211004144339.2634330-2-bjwyman@gmail.com
[groeck: Fixed continuation line alignment]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/pmbus/ibm-cffps.c

@@ -508,16 +508,27 @@ static int ibm_cffps_probe(struct i2c_client *client)
 		u16 ccin_revision = 0;
 		u16 ccin_version = CFFPS_CCIN_VERSION_1;
 		int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD);
+		char mfg_id[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
 
 		if (ccin > 0) {
 			ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin);
 			ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin);
 		}
 
+		rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, mfg_id);
+		if (rc < 0) {
+			dev_err(&client->dev, "Failed to read Manufacturer ID\n");
+			return rc;
+		}
+
 		switch (ccin_version) {
 		default:
 		case CFFPS_CCIN_VERSION_1:
-			vs = cffps1;
+			if ((strncmp(mfg_id, "ACBE", 4) == 0) ||
+				     (strncmp(mfg_id, "ARTE", 4) == 0))
+				vs = cffps1;
+			else
+				vs = cffps2;
 			break;
 		case CFFPS_CCIN_VERSION_2:
 			vs = cffps2;