[mirror_ubuntu-bionic-kernel.git] / Documentation / devicetree / bindings / security / tpm / tpm-i2c.txt

* Device Tree Bindings for I2C based Trusted Platform Module(TPM)

Required properties:

- compatible     : 'manufacturer,model', eg. nuvoton,npct650
- label          : human readable string describing the device, eg. "tpm"
- linux,sml-base : 64-bit base address of the reserved memory allocated for
                   the firmware event log
- linux,sml-size : size of the memory allocated for the firmware event log

Optional properties:

- powered-while-suspended: present when the TPM is left powered on between
                           suspend and resume (makes the suspend/resume
                           callbacks do nothing).

Example (for OpenPower Systems with Nuvoton TPM 2.0 on I2C)
----------------------------------------------------------

tpm@57 {
	reg = <0x57>;
	label = "tpm";
	compatible = "nuvoton,npct650", "nuvoton,npct601";
	linux,sml-base = <0x7f 0xfd450000>;
	linux,sml-size = <0x10000>;
};
Commit	Line	Data
f45aac38 NJ	1	* Device Tree Bindings for I2C based Trusted Platform Module(TPM)
	2
	3	Required properties:
	4
	5	- compatible : 'manufacturer,model', eg. nuvoton,npct650
	6	- label : human readable string describing the device, eg. "tpm"
	7	- linux,sml-base : 64-bit base address of the reserved memory allocated for
	8	the firmware event log
	9	- linux,sml-size : size of the memory allocated for the firmware event log
	10
5d0e4d78 EBS	11	Optional properties:
	12
	13	- powered-while-suspended: present when the TPM is left powered on between
	14	suspend and resume (makes the suspend/resume
	15	callbacks do nothing).
	16
f45aac38 NJ	17	Example (for OpenPower Systems with Nuvoton TPM 2.0 on I2C)
	18	----------------------------------------------------------
	19
	20	tpm@57 {
	21	reg = <0x57>;
	22	label = "tpm";
	23	compatible = "nuvoton,npct650", "nuvoton,npct601";
	24	linux,sml-base = <0x7f 0xfd450000>;
	25	linux,sml-size = <0x10000>;
f45aac38	26	};