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drivers: tpm: atmel_twi: implement get_desc operation

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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>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Mathew McBride 2021-11-11 04:06:30 +00:00 committed by Ilias Apalodimas
parent fdb4a5fcd7
commit fb30d99df8
1 changed files with 4 additions and 1 deletions
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5
drivers/tpm/tpm_atmel_twi.c
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@ -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);
}
/*