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tpm: cr50: Release locality on exit

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At present the cr50 driver claims the locality and does not release it for
Linux. This causes problems. Fix this by tracking what is claimed, and
adding a 'remove' method.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-04-08 16:57:22 -06:00 committed by Bin Meng
parent b14ccfcf09
commit 79b7ade5b5
1 changed files with 11 additions and 2 deletions
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13
drivers/tpm/cr50_i2c.c
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@ -206,7 +206,7 @@ static int release_locality(struct udevice *dev, int force)
cr50_i2c_write(dev, addr, &buf, 1);
}
priv->locality = 0;
priv->locality = -1;
return 0;
}
@ -499,6 +499,7 @@ static int process_reset(struct udevice *dev)
static int claim_locality(struct udevice *dev, int loc)
{
const u8 mask = TPM_ACCESS_VALID | TPM_ACCESS_ACTIVE_LOCALITY;
struct cr50_priv *priv = dev_get_priv(dev);
u8 access;
int ret;
@ -525,6 +526,7 @@ static int claim_locality(struct udevice *dev, int loc)
return -EPERM;
}
log_info("Claimed locality %d\n", loc);
priv->locality = loc;
return 0;
}
@ -559,7 +561,11 @@ static int cr50_i2c_open(struct udevice *dev)
static int cr50_i2c_cleanup(struct udevice *dev)
{
release_locality(dev, 1);
struct cr50_priv *priv = dev_get_priv(dev);
printf("%s: cleanup %d\n", __func__, priv->locality);
if (priv->locality != -1)
release_locality(dev, 1);
return 0;
}
@ -631,6 +637,7 @@ static int cr50_i2c_probe(struct udevice *dev)
return log_msg_ret("vendor-id", -EXDEV);
}
priv->vendor = vendor;
priv->locality = -1;
return 0;
}
@ -655,5 +662,7 @@ U_BOOT_DRIVER(cr50_i2c) = {
.ops = &cr50_i2c_ops,
.ofdata_to_platdata = cr50_i2c_ofdata_to_platdata,
.probe = cr50_i2c_probe,
.remove = cr50_i2c_cleanup,
.priv_auto_alloc_size = sizeof(struct cr50_priv),
.flags = DM_FLAG_OS_PREPARE,
};