Could I get some feedback on this patch please? Is there something I
am not doing correctly?
-Jett
On Thu, Jul 18, 2024 at 2:24 PM Jett Rink <jettrink@xxxxxxxxxxxx> wrote:
>
> Accept another DID:VID for the next generation Google TPM. This TPM
> has the same Ti50 firmware and fulfills the same interface.
>
> Signed-off-by: Jett Rink <jettrink@xxxxxxxxxxxx>
> ---
>
> Changes in v2:
> Patchset 2 applies cleanly
>
> drivers/char/tpm/tpm_tis_i2c_cr50.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm_tis_i2c_cr50.c b/drivers/char/tpm/tpm_tis_i2c_cr50.c
> index adf22992138e..b50005ccfc5e 100644
> --- a/drivers/char/tpm/tpm_tis_i2c_cr50.c
> +++ b/drivers/char/tpm/tpm_tis_i2c_cr50.c
> @@ -31,7 +31,8 @@
> #define TPM_CR50_TIMEOUT_SHORT_MS 2 /* Short timeout during transactions */
> #define TPM_CR50_TIMEOUT_NOIRQ_MS 20 /* Timeout for TPM ready without IRQ */
> #define TPM_CR50_I2C_DID_VID 0x00281ae0L /* Device and vendor ID reg value */
> -#define TPM_TI50_I2C_DID_VID 0x504a6666L /* Device and vendor ID reg value */
> +#define TPM_TI50_DT_I2C_DID_VID 0x504a6666L /* Device and vendor ID reg value */
> +#define TPM_TI50_OT_I2C_DID_VID 0x50666666L /* Device and vendor ID reg value */
> #define TPM_CR50_I2C_MAX_RETRIES 3 /* Max retries due to I2C errors */
> #define TPM_CR50_I2C_RETRY_DELAY_LO 55 /* Min usecs between retries on I2C */
> #define TPM_CR50_I2C_RETRY_DELAY_HI 65 /* Max usecs between retries on I2C */
> @@ -741,14 +742,18 @@ static int tpm_cr50_i2c_probe(struct i2c_client *client)
> }
>
> vendor = le32_to_cpup((__le32 *)buf);
> - if (vendor != TPM_CR50_I2C_DID_VID && vendor != TPM_TI50_I2C_DID_VID) {
> + if (vendor != TPM_CR50_I2C_DID_VID &&
> + vendor != TPM_TI50_DT_I2C_DID_VID &&
> + vendor != TPM_TI50_OT_I2C_DID_VID) {
> dev_err(dev, "Vendor ID did not match! ID was %08x\n", vendor);
> tpm_cr50_release_locality(chip, true);
> return -ENODEV;
> }
>
> dev_info(dev, "%s TPM 2.0 (i2c 0x%02x irq %d id 0x%x)\n",
> - vendor == TPM_TI50_I2C_DID_VID ? "ti50" : "cr50",
> + vendor == TPM_CR50_I2C_DID_VID ? "cr50" :
> + vendor == TPM_TI50_DT_I2C_DID_VID ? "ti50 DT" :
> + "ti50 OT",
> client->addr, client->irq, vendor >> 16);
> return tpm_chip_register(chip);
> }
> --
> 2.45.2.1089.g2a221341d9-goog
>
