1Trusted Computing Group MMIO Trusted Platform Module 2 3The TCG defines multi vendor standard for accessing a TPM chip, this 4is the standard protocol defined to access the TPM via MMIO. Typically 5this interface will be implemented over Intel's LPC bus. 6 7Refer to the 'TCG PC Client Specific TPM Interface Specification (TIS)' TCG 8publication for the specification. 9 10Required 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- interrupts: An optional interrupt indicating command completion. 17 18Example: 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 }; 26