diff mbox series

[1/2] dt-bindings: simple-pm-bus: Add optional resets

Message ID 20240223-b4-bus-v1-1-2803c3ac4673@outlook.com
State New
Headers
Series simple-pm-bus: deassert resets if possible |

Commit Message

Yang Xiwen via B4 Relay Feb. 23, 2024, 3:49 a.m. UTC 
  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

Geert Uytterhoeven Feb. 23, 2024, 8:08 a.m. UTC | #1 
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
diff mbox series

Patch

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'