1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 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 specification 8 9maintainers: 10 - Lukas Wunner <lukas@wunner.de> 11 12description: | 13 The Trusted Computing Group (TCG) has defined a multi-vendor standard 14 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 - infineon,slb9670 24 - st,st33htpm-spi 25 - st,st33zp24-spi 26 - const: tcg,tpm_tis-spi 27 28allOf: 29 - $ref: tpm-common.yaml# 30 - $ref: /schemas/spi/spi-peripheral-props.yaml# 31 - if: 32 properties: 33 compatible: 34 contains: 35 const: st,st33zp24-spi 36 then: 37 properties: 38 spi-max-frequency: 39 maximum: 10000000 40 41required: 42 - compatible 43 - reg 44 45unevaluatedProperties: false 46 47examples: 48 - | 49 spi { 50 #address-cells = <1>; 51 #size-cells = <0>; 52 53 tpm@0 { 54 reg = <0>; 55 compatible = "infineon,slb9670", "tcg,tpm_tis-spi"; 56 spi-max-frequency = <10000000>; 57 }; 58 }; 59 60 - | 61 #include <dt-bindings/gpio/gpio.h> 62 #include <dt-bindings/interrupt-controller/irq.h> 63 spi { 64 #address-cells = <1>; 65 #size-cells = <0>; 66 67 tpm@0 { 68 reg = <0>; 69 compatible = "st,st33zp24-spi", "tcg,tpm_tis-spi"; 70 spi-max-frequency = <10000000>; 71 interrupt-parent = <&gpio5>; 72 interrupts = <7 IRQ_TYPE_LEVEL_HIGH>; 73 lpcpd-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>; 74 }; 75 }; 76