tpm: of: Handle IBM,vtpm20 case when getting log parameters

A vTPM 2.0 is identified by 'IBM,vtpm20' in the 'compatible' node in the device tree. Handle it in the same way as 'IBM,vtpm'. The vTPM 2.0's log is written in little endian format so that for this aspect we can rely on existing code. Signed-off-by: Stefan Berger <[email protected]> Acked-by: Nayna Jain <[email protected]> Tested-by: Nayna Jain <[email protected]> Reviewed-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]>
ArmSoM · Mar 13, 2020 · 5cb2ace · 5cb2ace
1 parent 77b400d
commit 5cb2ace
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/char/tpm/eventlog/of.c b/drivers/char/tpm/eventlog/of.c
@@ -51,7 +51,8 @@ int tpm_read_log_of(struct tpm_chip *chip)
 	 * endian format. For this reason, vtpm doesn't need conversion
 	 * but physical tpm needs the conversion.
 	 */
-	if (of_property_match_string(np, "compatible", "IBM,vtpm") < 0) {
+	if (of_property_match_string(np, "compatible", "IBM,vtpm") < 0 &&
+	    of_property_match_string(np, "compatible", "IBM,vtpm20") < 0) {
 		size = be32_to_cpup((__force __be32 *)sizep);
 		base = be64_to_cpup((__force __be64 *)basep);
 	} else {