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authorJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2016-09-27 12:02:13 +0300
committerJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2016-09-27 12:02:13 +0300
commit324152502b0ef2f65a3fe039b7dcd27b223d14ac (patch)
treee1e3f871d1f346493f147f909c0f3b688df55735 /drivers/char/tpm/tpm_crb.c
parentcfa188220363647c332028c094eb4cae86c918ad (diff)
Revert "tpm/tpm_crb: implement tpm crb idle state"
This reverts commit e17acbbb69d30836a8c12e2c09bbefab8656693e. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char/tpm/tpm_crb.c')
-rw-r--r--drivers/char/tpm/tpm_crb.c69
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)