Simplify tpm_read_log_of() and call of_tpm_get_sml_parameters() to get
the base and size of the TPM log.
Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
Cc: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxx>
---
drivers/char/tpm/eventlog/of.c | 31 +++++--------------------------
1 file changed, 5 insertions(+), 26 deletions(-)
diff --git a/drivers/char/tpm/eventlog/of.c b/drivers/char/tpm/eventlog/of.c
index a9ce66d09a75..e272c7a0765f 100644
--- a/drivers/char/tpm/eventlog/of.c
+++ b/drivers/char/tpm/eventlog/of.c
@@ -12,6 +12,7 @@
#include <linux/slab.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/tpm_eventlog.h>
#include "../tpm.h"
@@ -20,11 +21,10 @@
int tpm_read_log_of(struct tpm_chip *chip)
{
struct device_node *np;
- const u32 *sizep;
- const u64 *basep;
struct tpm_bios_log *log;
u32 size;
u64 base;
+ int ret;
log = &chip->log;
if (chip->dev.parent && chip->dev.parent->of_node)
@@ -35,30 +35,9 @@ int tpm_read_log_of(struct tpm_chip *chip)
if (of_property_read_bool(np, "powered-while-suspended"))
chip->flags |= TPM_CHIP_FLAG_ALWAYS_POWERED;
- sizep = of_get_property(np, "linux,sml-size", NULL);
- basep = of_get_property(np, "linux,sml-base", NULL);
- if (sizep == NULL && basep == NULL)
- return -ENODEV;
- if (sizep == NULL || basep == NULL)
- return -EIO;
-
- /*
- * For both vtpm/tpm, firmware has log addr and log size in big
- * endian format. But in case of vtpm, there is a method called
- * sml-handover which is run during kernel init even before
- * device tree is setup. This sml-handover function takes care
- * of endianness and writes to sml-base and sml-size in little
- * 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 &&
- of_property_match_string(np, "compatible", "IBM,vtpm20") < 0) {
- size = be32_to_cpup((__force __be32 *)sizep);
- base = be64_to_cpup((__force __be64 *)basep);
- } else {
- size = *sizep;
- base = *basep;
- }
+ ret = of_tpm_get_sml_parameters(np, &base, &size);
+ if (ret < 0)
+ return ret;
if (size == 0) {
dev_warn(&chip->dev, "%s: Event log area empty\n", __func__);
--
2.35.1
