Merge tag 'tpmdd-next-v5.17-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd

Pull TPM updates from Jarkko Sakkinen:
 "Other than bug fixes for TPM, this includes a patch for asymmetric
  keys to allow to look up and verify with self-signed certificates
  (keys without so called AKID - Authority Key Identifier) using a new
  "dn:" prefix in the query"

* tag 'tpmdd-next-v5.17-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
  lib: remove redundant assignment to variable ret
  tpm: fix NPE on probe for missing device
  tpm: fix potential NULL pointer access in tpm_del_char_device
  tpm: Add Upgrade/Reduced mode support for TPM2 modules
  char: tpm: cr50: Set TPM_FIRMWARE_POWER_MANAGED based on device property
  keys: X.509 public key issuer lookup without AKID
  tpm_tis: Fix an error handling path in 'tpm_tis_core_init()'
  tpm: tpm_tis_spi_cr50: Add default RNG quality
  tpm/st33zp24: drop unneeded over-commenting
  tpm: add request_locality before write TPM_INT_ENABLE

1 files changed, 19 insertions, 1 deletions

diff --git a/drivers/char/tpm/tpm_tis_spi_cr50.c b/drivers/char/tpm/tpm_tis_spi_cr50.c
index ea759af25634..7bf123d3c537 100644
--- a/drivers/char/tpm/tpm_tis_spi_cr50.c
+++ b/drivers/char/tpm/tpm_tis_spi_cr50.c
@@ -36,6 +36,9 @@
 #define TPM_CR50_FW_VER(l)			(0x0f90 | ((l) << 12))
 #define TPM_CR50_MAX_FW_VER_LEN			64
 
+/* Default quality for hwrng. */
+#define TPM_CR50_DEFAULT_RNG_QUALITY		700
+
 struct cr50_spi_phy {
 	struct tpm_tis_spi_phy spi_phy;
 
@@ -182,6 +185,19 @@ static int cr50_spi_flow_control(struct tpm_tis_spi_phy *phy,
 	return 0;
 }
 
+static bool tpm_cr50_spi_is_firmware_power_managed(struct device *dev)
+{
+	u8 val;
+	int ret;
+
+	/* This flag should default true when the device property is not present */
+	ret = device_property_read_u8(dev, "firmware-power-managed", &val);
+	if (ret)
+		return true;
+
+	return val;
+}
+
 static int tpm_tis_spi_cr50_transfer(struct tpm_tis_data *data, u32 addr, u16 len,
 				     u8 *in, const u8 *out)
 {
@@ -264,6 +280,7 @@ int cr50_spi_probe(struct spi_device *spi)
 	phy = &cr50_phy->spi_phy;
 	phy->flow_control = cr50_spi_flow_control;
 	phy->wake_after = jiffies;
+	phy->priv.rng_quality = TPM_CR50_DEFAULT_RNG_QUALITY;
 	init_completion(&phy->ready);
 
 	cr50_phy->access_delay = CR50_NOIRQ_ACCESS_DELAY;
@@ -305,7 +322,8 @@ int cr50_spi_probe(struct spi_device *spi)
 	cr50_print_fw_version(&phy->priv);
 
 	chip = dev_get_drvdata(&spi->dev);
-	chip->flags |= TPM_CHIP_FLAG_FIRMWARE_POWER_MANAGED;
+	if (tpm_cr50_spi_is_firmware_power_managed(&spi->dev))
+		chip->flags |= TPM_CHIP_FLAG_FIRMWARE_POWER_MANAGED;
 
 	return 0;
 }