[1/2] dt-bindings: simple-pm-bus: Add optional resets
Commit Message
From: Yang Xiwen <forbidden405@outlook.com>
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@outlook.com>
---
Documentation/devicetree/bindings/bus/simple-pm-bus.yaml | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
Comments
On Fri, Feb 23, 2024 at 4:49 AM Yang Xiwen via B4 Relay
<devnull+forbidden405.outlook.com@kernel.org> wrote:
> From: Yang Xiwen <forbidden405@outlook.com>
>
> 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@outlook.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Gr{oetje,eeting}s,
Geert
@@ -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'