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Message-Id: <20250310090211.286549-2-m.wilczynski@samsung.com>
Date: Mon, 10 Mar 2025 10:02:07 +0100
From: Michal Wilczynski <m.wilczynski@...sung.com>
To: robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, drew@...7.com,
guoren@...nel.org, wefu@...hat.com, paul.walmsley@...ive.com,
palmer@...belt.com, aou@...s.berkeley.edu, alex@...ti.fr,
jszhang@...nel.org, ulf.hansson@...aro.org, m.szyprowski@...sung.com
Cc: linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, Michal
Wilczynski <m.wilczynski@...sung.com>, Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org>
Subject: [PATCH v7 1/5] dt-bindings: firmware: thead,th1520: Add support for
firmware node
The kernel communicates with the E902 core through the mailbox
transport using AON firmware protocol. Add dt-bindings to document it
the dt node.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Signed-off-by: Michal Wilczynski <m.wilczynski@...sung.com>
---
.../bindings/firmware/thead,th1520-aon.yaml | 53 +++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 54 insertions(+)
create mode 100644 Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
diff --git a/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml b/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
new file mode 100644
index 000000000000..bbc183200400
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/thead,th1520-aon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: T-HEAD TH1520 AON (Always-On) Firmware
+
+description: |
+ The Always-On (AON) subsystem in the TH1520 SoC is responsible for managing
+ low-power states, system wakeup events, and power management tasks. It is
+ designed to operate independently in a dedicated power domain, allowing it to
+ remain functional even during the SoC's deep sleep states.
+
+ At the heart of the AON subsystem is the E902, a low-power core that executes
+ firmware responsible for coordinating tasks such as power domain control,
+ clock management, and system wakeup signaling. Communication between the main
+ SoC and the AON subsystem is handled through a mailbox interface, which
+ enables message-based interactions with the AON firmware.
+
+maintainers:
+ - Michal Wilczynski <m.wilczynski@...sung.com>
+
+properties:
+ compatible:
+ const: thead,th1520-aon
+
+ mboxes:
+ maxItems: 1
+
+ mbox-names:
+ items:
+ - const: aon
+
+ "#power-domain-cells":
+ const: 1
+
+required:
+ - compatible
+ - mboxes
+ - mbox-names
+ - "#power-domain-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ aon: aon {
+ compatible = "thead,th1520-aon";
+ mboxes = <&mbox_910t 1>;
+ mbox-names = "aon";
+ #power-domain-cells = <1>;
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index ed7aa6867674..15f4bc618064 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20427,6 +20427,7 @@ L: linux-riscv@...ts.infradead.org
S: Maintained
T: git https://github.com/pdp7/linux.git
F: Documentation/devicetree/bindings/clock/thead,th1520-clk-ap.yaml
+F: Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
F: Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml
F: Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
F: Documentation/devicetree/bindings/pinctrl/thead,th1520-pinctrl.yaml
--
2.34.1
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