diff options
Diffstat (limited to 'drivers/tpm/cr50_i2c.c')
| -rw-r--r-- | drivers/tpm/cr50_i2c.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/tpm/cr50_i2c.c b/drivers/tpm/cr50_i2c.c index b904a7d426..b67051af26 100644 --- a/drivers/tpm/cr50_i2c.c +++ b/drivers/tpm/cr50_i2c.c @@ -34,6 +34,15 @@ enum { CR50_MAX_BUF_SIZE = 63, }; +/** + * struct cr50_priv - Private driver data + * + * @ready_gpio: GPIO to use to check if the TPM is ready + * @irq: IRQ to use check if the TPM is ready (has priority over @ready_gpio) + * @locality: Currenttly claimed locality (-1 if none) + * @vendor: vendor: Vendor ID for TPM + * @use_irq: true to use @irq, false to use @ready if available + */ struct cr50_priv { struct gpio_desc ready_gpio; struct irq irq; @@ -206,7 +215,7 @@ 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 +508,7 @@ 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 +535,7 @@ 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 +570,11 @@ 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; } @@ -592,7 +607,7 @@ static int cr50_i2c_ofdata_to_platdata(struct udevice *dev) priv->irq = irq; priv->use_irq = true; } else { - ret = gpio_request_by_name(dev, "ready-gpio", 0, + ret = gpio_request_by_name(dev, "ready-gpios", 0, &priv->ready_gpio, GPIOD_IS_IN); if (ret) { log_warning("Cr50 does not have an ready GPIO/interrupt (err=%d)\n", @@ -631,6 +646,7 @@ 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 +671,7 @@ 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, }; |