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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/tpm/tcg,tpm_tis-spi.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: SPI-attached Trusted Platform Module conforming to TCG TIS specification8 9maintainers:10 - Lukas Wunner <lukas@wunner.de>11 12description: |13 The Trusted Computing Group (TCG) has defined a multi-vendor standard14 for accessing a TPM chip. It can be transported over various buses,15 one of them being SPI. The standard is named:16 TCG PC Client Specific TPM Interface Specification (TIS)17 https://trustedcomputinggroup.org/resource/pc-client-work-group-pc-client-specific-tpm-interface-specification-tis/18 19properties:20 compatible:21 items:22 - enum:23 - atmel,attpm20p24 - infineon,slb967025 - st,st33htpm-spi26 - st,st33zp24-spi27 - const: tcg,tpm_tis-spi28 29allOf:30 - $ref: tpm-common.yaml#31 - $ref: /schemas/spi/spi-peripheral-props.yaml#32 - if:33 properties:34 compatible:35 contains:36 const: st,st33zp24-spi37 then:38 properties:39 spi-max-frequency:40 maximum: 1000000041 42required:43 - compatible44 - reg45 46unevaluatedProperties: false47 48examples:49 - |50 spi {51 #address-cells = <1>;52 #size-cells = <0>;53 54 tpm@0 {55 reg = <0>;56 compatible = "infineon,slb9670", "tcg,tpm_tis-spi";57 spi-max-frequency = <10000000>;58 };59 };60 61 - |62 #include <dt-bindings/gpio/gpio.h>63 #include <dt-bindings/interrupt-controller/irq.h>64 spi {65 #address-cells = <1>;66 #size-cells = <0>;67 68 tpm@0 {69 reg = <0>;70 compatible = "st,st33zp24-spi", "tcg,tpm_tis-spi";71 spi-max-frequency = <10000000>;72 interrupt-parent = <&gpio5>;73 interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;74 lpcpd-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>;75 };76 };77