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Message-Id: <20191202130132.175382-5-amirmizi6@gmail.com>
Date:   Mon,  2 Dec 2019 15:01:31 +0200
From:   amirmizi6@...il.com
To:     Eyal.Cohen@...oton.com, jarkko.sakkinen@...ux.intel.com,
        oshrialkoby85@...il.com, alexander.steffen@...ineon.com,
        robh+dt@...nel.org, mark.rutland@....com, peterhuewe@....de,
        jgg@...pe.ca, arnd@...db.de, gregkh@...uxfoundation.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-integrity@...r.kernel.org, oshri.alkoby@...oton.com,
        tmaimon77@...il.com, gcwilson@...ibm.com, kgoldman@...ibm.com,
        ayna@...ux.vnet.ibm.com, Dan.Morav@...oton.com,
        oren.tanami@...oton.com, shmulik.hager@...oton.com,
        amir.mizinski@...oton.com, Amir Mizinski <amirmizi6@...il.com>
Subject: [PATCH v1 4/5] dt-bindings: tpm: Add the TPM TIS I2C device tree binding documentaion

From: Amir Mizinski <amirmizi6@...il.com>

this file aim at documenting TPM TIS I2C related dt-bindings for the I2C PTP based Physical TPM.

Signed-off-by: Amir Mizinski <amirmizi6@...il.com>
---
 .../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

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