tpm: wait for valid status
The TPM specification says that the EXPECT_DATA bit is not valid until
the VALID bit is set. Wait for that bit to be set. Fixes problems with
Ifineon SPI TPM.
Signed-off-by: Roman Kapl <rka@sysgo.com>
diff --git a/drivers/tpm/tpm2_tis_spi.c b/drivers/tpm/tpm2_tis_spi.c
index 8878130..7186c17 100644
--- a/drivers/tpm/tpm2_tis_spi.c
+++ b/drivers/tpm/tpm2_tis_spi.c
@@ -295,6 +295,14 @@
return -ETIMEDOUT;
}
+static u8 tpm_tis_spi_valid_status(struct udevice *dev, u8 *status)
+{
+ struct tpm_chip *chip = dev_get_priv(dev);
+
+ return tpm_tis_spi_wait_for_stat(dev, TPM_STS_VALID,
+ chip->timeout_c, status);
+}
+
static int tpm_tis_spi_get_burstcount(struct udevice *dev)
{
struct tpm_chip *chip = dev_get_priv(dev);
@@ -455,7 +463,7 @@
i += size;
}
- ret = tpm_tis_spi_status(dev, &status);
+ ret = tpm_tis_spi_valid_status(dev, &status);
if (ret)
goto out_err;
@@ -469,7 +477,7 @@
if (ret)
goto out_err;
- ret = tpm_tis_spi_status(dev, &status);
+ ret = tpm_tis_spi_valid_status(dev, &status);
if (ret)
goto out_err;