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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/tpm/tcg,tpm_tis-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SPI-attached Trusted Platform Module conforming to TCG TIS specification
+
+maintainers:
+ - Lukas Wunner <lukas@wunner.de>
+
+description: |
+ The Trusted Computing Group (TCG) has defined a multi-vendor standard
+ for accessing a TPM chip. It can be transported over various buses,
+ one of them being SPI. The standard is named:
+ TCG PC Client Specific TPM Interface Specification (TIS)
+ https://trustedcomputinggroup.org/resource/pc-client-work-group-pc-client-specific-tpm-interface-specification-tis/
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - atmel,attpm20p
+ - infineon,slb9670
+ - st,st33htpm-spi
+ - st,st33zp24-spi
+ - const: tcg,tpm_tis-spi
+
+allOf:
+ - $ref: tpm-common.yaml#
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: st,st33zp24-spi
+ then:
+ properties:
+ spi-max-frequency:
+ maximum: 10000000
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ tpm@0 {
+ reg = <0>;
+ compatible = "infineon,slb9670", "tcg,tpm_tis-spi";
+ spi-max-frequency = <10000000>;
+ };
+ };
+
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ tpm@0 {
+ reg = <0>;
+ compatible = "st,st33zp24-spi", "tcg,tpm_tis-spi";
+ spi-max-frequency = <10000000>;
+ interrupt-parent = <&gpio5>;
+ interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
+ lpcpd-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>;
+ };
+ };