From: Yang Xiwen <forbidden405@xxxxxxxxxxx>
For some on-soc buses, it is also needed to deassert the resets before
access. Document it in the binding.
Signed-off-by: Yang Xiwen <forbidden405@xxxxxxxxxxx>
---
Documentation/devicetree/bindings/bus/simple-pm-bus.yaml | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml b/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml
index 182134d7a6a3..430638104980 100644
--- a/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml
+++ b/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml
@@ -14,8 +14,9 @@ description: |
driver, as it's typically initialized by the boot loader.
However, its bus controller is part of a PM domain, or under the control
- of a functional clock. Hence, the bus controller's PM domain and/or
- clock must be enabled for child devices connected to the bus (either
+ of a functional clock, and it might have a reset control signal. Hence,
+ the bus controller's PM domain and/or clock must be enabled, reset control
+ signal must be deasserted for child devices connected to the bus (either
on-SoC or externally) to function.
While "simple-pm-bus" follows the "simple-bus" set of properties, as
@@ -49,6 +50,8 @@ properties:
# Required if clocks is absent, optional otherwise
minItems: 1
+ resets: true
+
required:
- compatible
- '#address-cells'
--
2.43.0
