u-boot/include/tpm-common.h

133 	 * send() - send data to the TPM
136 	 * @sendbuf:	Buffer of the data to send
137 	 * @send_size:	Size of the data to send
141 	int (*send)(struct udevice *dev, const u8 *sendbuf, size_t send_size);  member
168 	 * xfer() - send data to the TPM and get response
171 	 * to send(), recv() and cleanup(). It should handle all aspects of
175 	 * @sendbuf:	Buffer of the data to send
176 	 * @send_size:	Size of the data to send
258  * tpm_xfer() - send data to the TPM and get response
260  * This first uses the device's send() method to send the bytes. Then it calls
271  * @sendbuf - buffer of the data to send
272  * @send_size size of the data to send