| Tom Rini | 93743d2 | 2024-04-01 09:08:13 -0400 | [diff] [blame] | 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 | |
| 7 | title: SPI-attached Trusted Platform Module conforming to TCG TIS specification |
| 8 | |
| 9 | maintainers: |
| 10 | - Lukas Wunner <lukas@wunner.de> |
| 11 | |
| 12 | description: | |
| 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 | |
| 19 | properties: |
| 20 | compatible: |
| 21 | items: |
| 22 | - enum: |
| Tom Rini | 6bb92fc | 2024-05-20 09:54:58 -0600 | [diff] [blame] | 23 | - atmel,attpm20p |
| Tom Rini | 93743d2 | 2024-04-01 09:08:13 -0400 | [diff] [blame] | 24 | - infineon,slb9670 |
| 25 | - st,st33htpm-spi |
| 26 | - st,st33zp24-spi |
| 27 | - const: tcg,tpm_tis-spi |
| 28 | |
| 29 | allOf: |
| 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-spi |
| 37 | then: |
| 38 | properties: |
| 39 | spi-max-frequency: |
| 40 | maximum: 10000000 |
| 41 | |
| 42 | required: |
| 43 | - compatible |
| 44 | - reg |
| 45 | |
| 46 | unevaluatedProperties: false |
| 47 | |
| 48 | examples: |
| 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 | }; |