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tpm: cr50: Support opening the TPM multiple times

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The tpm_auto_start() function is used in tests and assumes that it can
open the TPM even if it is already open and a locality claimed. The cr50
driver does not use the common TPM2 TIS code so lacks a check for the
is_open field of struct tpm_chip and in fact it doesn't use that struct.

Add an equivalent check to cr50_i2c_open().

This fixes all init sequences on that TPM -- e.g 'tpm init && tpm init'
or 'tpm autostart && tpm init' used to hang

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Simon Glass
2025-04-02 10:28:10 +13:00
committed by Ilias Apalodimas
parent 739ad58dbe
commit 275777bc94
1 changed files with 4 additions and 0 deletions
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4
drivers/tpm/cr50_i2c.c
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@@ -737,9 +737,13 @@ static int cr50_i2c_report_state(struct udevice *dev, char *str, int str_max)
static int cr50_i2c_open(struct udevice *dev)
{
struct cr50_priv *priv = dev_get_priv(dev);
char buf[80];
int ret;
if (priv->locality != -1)
return -EBUSY;
ret = process_reset(dev);
if (ret)
return log_msg_ret("reset", ret);