Without get_desc, the tpm command will not provide a description of the device in 'tpm device' or 'tpm info'.
Due to the characteristics of the Atmel TPM it isn't possible to determine certain attributes (e.g open/close status) without using the TPM stack (compare Infineon and ST TPM drivers), so just print out the chip model and udevice name as the identifier.
Signed-off-by: Mathew McBride matt@traverse.com.au --- drivers/tpm/tpm_atmel_twi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/tpm/tpm_atmel_twi.c b/drivers/tpm/tpm_atmel_twi.c index 71b101406d..a5dfb34846 100644 --- a/drivers/tpm/tpm_atmel_twi.c +++ b/drivers/tpm/tpm_atmel_twi.c @@ -52,7 +52,10 @@ static int tpm_atmel_twi_close(struct udevice *dev) */ static int tpm_atmel_twi_get_desc(struct udevice *dev, char *buf, int size) { - return 0; + if (size < 50) + return -ENOSPC; + + return snprintf(buf, size, "Atmel AT97SC3204T I2C 1.2 TPM (%s)", dev->name); }
/*