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[sfrench/cifs-2.6.git] / Documentation / devicetree / bindings / security / tpm / tpm_tis_mmio.txt
1 Trusted Computing Group MMIO Trusted Platform Module
2
3 The TCG defines multi vendor standard for accessing a TPM chip, this
4 is the standard protocol defined to access the TPM via MMIO. Typically
5 this interface will be implemented over Intel's LPC bus.
6
7 Refer to the 'TCG PC Client Specific TPM Interface Specification (TIS)' TCG
8 publication for the specification.
9
10 Required properties:
11
12 - compatible: should contain a string below for the chip, followed by
13               "tcg,tpm-tis-mmio". Valid chip strings are:
14                   * "atmel,at97sc3204"
15 - reg: The location of the MMIO registers, should be at least 0x5000 bytes
16 - interrupt-parent/interrupts: An optional interrupt indicating command completion.
17
18 Example:
19
20         tpm_tis@90000 {
21                                 compatible = "atmel,at97sc3204", "tcg,tpm-tis-mmio";
22                                 reg = <0x90000 0x5000>;
23                                 interrupt-parent = <&EIC0>;
24                                 interrupts = <1 2>;
25         };