diff options
| -rw-r--r-- | drivers/char/tpm/tpm_crb.c | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c index 466d12b7fd46..a7c870af916c 100644 --- a/drivers/char/tpm/tpm_crb.c +++ b/drivers/char/tpm/tpm_crb.c @@ -83,75 +83,6 @@ struct crb_priv { u32 cmd_size; }; -/** - * crb_go_idle - request tpm crb device to go the idle state - * - * @dev: crb device - * @priv: crb private data - * - * Write CRB_CTRL_REQ_GO_IDLE to TPM_CRB_CTRL_REQ - * The device should respond within TIMEOUT_C by clearing the bit. - * Anyhow, we do not wait here as a consequent CMD_READY request - * will be handled correctly even if idle was not completed. - * - * The function does nothing for devices with ACPI-start method. - * - * Return: 0 always - */ -static int __maybe_unused crb_go_idle(struct device *dev, struct crb_priv *priv) -{ - if (priv->flags & CRB_FL_ACPI_START) - return 0; - - iowrite32(CRB_CTRL_REQ_GO_IDLE, &priv->cca->req); - /* we don't really care when this settles */ - - return 0; -} - -/** - * crb_cmd_ready - request tpm crb device to enter ready state - * - * @dev: crb device - * @priv: crb private data - * - * Write CRB_CTRL_REQ_CMD_READY to TPM_CRB_CTRL_REQ - * and poll till the device acknowledge it by clearing the bit. - * The device should respond within TIMEOUT_C. - * - * The function does nothing for devices with ACPI-start method - * - * Return: 0 on success -ETIME on timeout; - */ -static int __maybe_unused crb_cmd_ready(struct device *dev, - struct crb_priv *priv) -{ - ktime_t stop, start; - - if (priv->flags & CRB_FL_ACPI_START) - return 0; - - iowrite32(CRB_CTRL_REQ_CMD_READY, &priv->cca->req); - - start = ktime_get(); - stop = ktime_add(start, ms_to_ktime(TPM2_TIMEOUT_C)); - do { - if (!(ioread32(&priv->cca->req) & CRB_CTRL_REQ_CMD_READY)) { - dev_dbg(dev, "cmdReady in %lld usecs\n", - ktime_to_us(ktime_sub(ktime_get(), start))); - return 0; - } - usleep_range(50, 100); - } while (ktime_before(ktime_get(), stop)); - - if (ioread32(&priv->cca->req) & CRB_CTRL_REQ_CMD_READY) { - dev_warn(dev, "cmdReady timed out\n"); - return -ETIME; - } - - return 0; -} - static SIMPLE_DEV_PM_OPS(crb_pm, tpm_pm_suspend, tpm_pm_resume); static u8 crb_status(struct tpm_chip *chip) |