Commit 22a7488c authored by Jerome Forissier's avatar Jerome Forissier Committed by Rob Herring

Documentation: dt: Add binding for /secure-chosen/stdout-path

Some platforms may use a single device tree to describe two address
spaces, as described in d9f43bab ("Documentation: dt: Add bindings
for Secure-only devices"). For these platforms it makes sense to define
a secure counterpart of /chosen, namely: /secure-chosen. This new node
is meant to be used by the secure firmware to pass data to the secure
OS. Only the stdout-path property is supported for now.
Signed-off-by: default avatarJerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
parent d81cc4a8
......@@ -32,7 +32,8 @@ describe the view of Secure world using the standard bindings. These
secure- bindings only need to be used where both the Secure and Normal
world views need to be described in a single device tree.
Valid Secure world properties:
Valid Secure world properties
-----------------------------
- secure-status : specifies whether the device is present and usable
in the secure world. The combination of this with "status" allows
......@@ -51,3 +52,19 @@ Valid Secure world properties:
status = "disabled"; secure-status = "okay"; /* S-only */
status = "disabled"; /* disabled in both */
status = "disabled"; secure-status = "disabled"; /* disabled in both */
The secure-chosen node
----------------------
Similar to the /chosen node which serves as a place for passing data
between firmware and the operating system, the /secure-chosen node may
be used to pass data to the Secure OS. Only the properties defined
below may appear in the /secure-chosen node.
- stdout-path : specifies the device to be used by the Secure OS for
its console output. The syntax is the same as for /chosen/stdout-path.
If the /secure-chosen node exists but the stdout-path property is not
present, the Secure OS should not perform any console output. If
/secure-chosen does not exist, the Secure OS should use the value of
/chosen/stdout-path instead (that is, use the same device as the
Normal world OS).
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment