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Subject[PATCH 1/4] dt-bindings: tpm: Add compatible for Tegra TPM
Date
Tegra234 and Tegra241 devices have QSPI controller that supports TPM
devices. Since the controller only supports half duplex, sw wait polling
method implemented in tpm_tis_spi does not suffice. Wait polling as per
protocol is a hardware feature.

Add compatible for Tegra TPM driver with hardware flow control.

Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
---
.../bindings/security/tpm/nvidia,tegra-tpm-spi.txt | 14 ++++++++++++++
1 file changed, 14 insertions(+)
create mode 100644 Documentation/devicetree/bindings/security/tpm/nvidia,tegra-tpm-spi.txt

diff --git a/Documentation/devicetree/bindings/security/tpm/nvidia,tegra-tpm-spi.txt b/Documentation/devicetree/bindings/security/tpm/nvidia,tegra-tpm-spi.txt
new file mode 100644
index 000000000000..a2017945c7c0
--- /dev/null
+++ b/Documentation/devicetree/bindings/security/tpm/nvidia,tegra-tpm-spi.txt
@@ -0,0 +1,14 @@
+* Device Tree Bindings for TPM device connected to TEGRA QSPI controller
+
+Required Properties:
+
+- compatible: Should be "nvidia,tegra-tpm-spi".
+
+Example:
+
+&qspi0 {
+ tpm@0 {
+ compatible = "nvidia,tegra-tpm-spi";
+ reg = <0>;
+ };
+};
--
2.17.1
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