[PATCH 2/5] dt-bindings: power: reset: syscon-reboot-mode: allow supplies

[Alexey Charkov]

Whatever program that acts on a reboot mode runs before a full OS, so it
may lack the capability to enable the regulators it depends on, and a
reset that preserves the mode register generally leaves the regulators as
the previously running system left them.

Allow a reboot mode node to name such supplies, so that they can be
turned on while the mode is being requested.

Signed-off-by: Alexey Charkov <alchark at flipper.net>
---
 .../devicetree/bindings/power/reset/syscon-reboot-mode.yaml       | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml
index 79ffc78b23ea..5ed70c87269e 100644
--- a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml
+++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml
@@ -36,6 +36,14 @@ patternProperties:
   "^mode-.*$":
     maxItems: 1
 
+  "^[a-z0-9]+(-[a-z0-9]+)*-supply$":
+    description:
+      Supply that has to be powered for whatever program acts on the mode.
+      That could be a boot ROM with no access to regulators, and a warm reset
+      leaves them as the previously running system left them and not necessarily
+      what their expected out-of-reboot state is. Any supply described here is
+      enabled when a mode is requested, and stays enabled.
+
 unevaluatedProperties: false
 
 required:

-- 
2.55.0