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tpm: cr50: Add a better description and more debug

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Update the TPM description to include the interrupt mechanicm since this
is useful to know. Also add a warning if the TPM cannot be found and a
debug line if it succeeds.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-12-31 09:52:13 -07:00
parent 6208975e23
commit 5372fc772e
1 changed files with 18 additions and 4 deletions
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22
drivers/tpm/cr50_i2c.c
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@ -380,7 +380,6 @@ out_err:
static int cr50_i2c_send(struct udevice *dev, const u8 *buf, size_t len)
{
struct cr50_priv *priv = dev_get_priv(dev);
int status;
size_t burstcnt, limit, sent = 0;
u8 tpm_go[4] = { TPM_STS_GO };
@ -557,9 +556,23 @@ static int cr50_i2c_get_desc(struct udevice *dev, char *buf, int size)
{
struct dm_i2c_chip *chip = dev_get_parent_plat(dev);
struct cr50_priv *priv = dev_get_priv(dev);
int len;
return snprintf(buf, size, "cr50 TPM 2.0 (i2c %02x id %x) irq=%d",
chip->chip_addr, priv->vendor >> 16, priv->use_irq);
len = snprintf(buf, size, "cr50 TPM 2.0 (i2c %02x id %x), ",
chip->chip_addr, priv->vendor >> 16);
if (priv->use_irq) {
len += snprintf(buf + len, size - len, "irq=%s/%ld",
priv->irq.dev->name, priv->irq.id);
} else if (dm_gpio_is_valid(&priv->ready_gpio)) {
len += snprintf(buf + len, size - len, "gpio=%s/%u",
priv->ready_gpio.dev->name,
priv->ready_gpio.offset);
} else {
len += snprintf(buf + len, size - len, "delay=%d",
TIMEOUT_NO_IRQ_US);
}
return len;
}
static int cr50_i2c_open(struct udevice *dev)
@ -702,11 +715,12 @@ static int cr50_i2c_probe(struct udevice *dev)
mdelay(10);
}
if (vendor != CR50_DID_VID) {
log_debug("DID_VID %08x not recognised\n", vendor);
log_warning("DID_VID %08x not recognised\n", vendor);
return log_msg_ret("vendor-id", -EXDEV);
}
priv->vendor = vendor;
priv->locality = -1;
log_debug("Cr50 ready\n");
return 0;
}