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@xxxxxxxxxx> --- .../security/tpm/nvidia,tegra-tpm-spi.yaml | 34 +++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/devicetree/bindings/security/tpm/nvidia,tegra-tpm-spi.yaml diff --git a/Documentation/devicetree/bindings/security/tpm/nvidia,tegra-tpm-spi.yaml b/Documentation/devicetree/bindings/security/tpm/nvidia,tegra-tpm-spi.yaml new file mode 100644 index 000000000000..dcb78db7355c --- /dev/null +++ b/Documentation/devicetree/bindings/security/tpm/nvidia,tegra-tpm-spi.yaml @@ -0,0 +1,34 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/security/tpm/nvidia,tegra-tpm-spi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Tegra QSPI TPM driver + +maintainers: + - Thierry Reding <thierry.reding@xxxxxxxxx> + - Jonathan Hunter <jonathanh@xxxxxxxxxx> + +properties: + compatible: + enum: + - nvidia,tegra-tpm-spi + + reg: + maxItems: 1 + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + qspi1@3250000 { + tpm@0 { + compatible = "nvidia,tegra-tpm-spi"; + reg = <0>; + }; + }; -- 2.17.1
