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| author | Mathew McBride <matt@traverse.com.au> | 2021-11-11 07:06:30 +0300 |
|---|---|---|
| committer | Ilias Apalodimas <ilias.apalodimas@linaro.org> | 2021-11-17 14:47:33 +0300 |
| commit | fb30d99df831c7235e61bd0c4e07a25ae20926b3 (patch) | |
| tree | e917374669ec37d636db5d8c54deb39b1ef47056 | |
| parent | fdb4a5fcd7458d6cf075d908a499f822a9787fac (diff) | |
| download | u-boot-fb30d99df831c7235e61bd0c4e07a25ae20926b3.tar.xz | |
drivers: tpm: atmel_twi: implement get_desc operation
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>
| -rw-r--r-- | drivers/tpm/tpm_atmel_twi.c | 5 |
1 files changed, 4 insertions, 1 deletions
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); } /* |