From: Amir Mizinski <amirmizi6@xxxxxxxxx>
this file aim at documenting TPM TIS I2C related dt-bindings for the I2C PTP based Physical TPM.
Signed-off-by: Amir Mizinski <amirmizi6@xxxxxxxxx>
---
.../bindings/security/tpm/tpm_tis_i2c.txt | 24 ++++++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 Documentation/devicetree/bindings/security/tpm/tpm_tis_i2c.txt
diff --git a/Documentation/devicetree/bindings/security/tpm/tpm_tis_i2c.txt b/Documentation/devicetree/bindings/security/tpm/tpm_tis_i2c.txt
new file mode 100644
index 0000000..7d5a69e
--- /dev/null
+++ b/Documentation/devicetree/bindings/security/tpm/tpm_tis_i2c.txt
@@ -0,0 +1,24 @@
+* Device Tree Bindings for I2C PTP based Trusted Platform Module(TPM)
+
+The TCG defines hardware protocol, registers and interface (based
+on the TPM Interface Specification) for accessing TPM devices
+implemented with an I2C interface.
+
+Refer to the 'I2C Interface Definition' section in 'TCG PC Client
+PlatformTPMProfile(PTP) Specification' publication for specification.
+
+Required properties:
+
+- compatible : Should be "tcg,tpm_tis-i2c"
+- reg : Address on the bus
+- tpm-pirq : Input gpio pin, used for host interrupts
+
+Example (for Raspberry Pie 3 Board with Nuvoton's NPCT75X (2.0)
+-------------------------------------------------------------------
+
+tpm_tis-i2c: tpm_tis-i2c@2e {
+
+ compatible = "tcg,tpm_tis-i2c";
+ reg = <0x2e>;
+ tpm-pirq = <&gpio 24 GPIO_ACTIVE_HIGH>;
+};
--
2.7.4
