Broadcom BCM23550 has a Cluster Dormant Control block that keeps the CPU
in idle state. A command needs to be sent to this block to bring the CPU
into running state.
This has been in use in mainline Linux since ~2016, but was never
documented. Add a dt-binding document for it.
Signed-off-by: Stanislav Jakubek <[email protected]>
---
.../bindings/soc/bcm/brcm,bcm23550-cdc.yaml | 35 +++++++++++++++++++
1 file changed, 35 insertions(+)
create mode 100644 Documentation/devicetree/bindings/soc/bcm/brcm,bcm23550-cdc.yaml
diff --git a/Documentation/devicetree/bindings/soc/bcm/brcm,bcm23550-cdc.yaml b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm23550-cdc.yaml
new file mode 100644
index 000000000000..1a952f569803
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm23550-cdc.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/bcm/brcm,bcm23550-cdc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM23550 Cluster Dormant Control
+
+description:
+ The Cluster Dormant Control block keeps the CPU in idle state. A command
+ needs to be sent to this block to bring the CPU into running state.
+
+maintainers:
+ - Florian Fainelli <[email protected]>
+
+properties:
+ compatible:
+ const: brcm,bcm23550-cdc
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ cdc@3fe0e000 {
+ compatible = "brcm,bcm23550-cdc";
+ reg = <0x3fe0e000 0x78>;
+ };
+...
--
2.25.1
On 08/05/2023 15:59, Stanislav Jakubek wrote:
> Broadcom BCM23550 has a Cluster Dormant Control block that keeps the CPU
> in idle state. A command needs to be sent to this block to bring the CPU
> into running state.
>
> This has been in use in mainline Linux since ~2016, but was never
> documented. Add a dt-binding document for it.
>
> Signed-off-by: Stanislav Jakubek <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Best regards,
Krzysztof