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23 Dec 2024 12:56:04 +0000 (GMT) From: Michal Wilczynski To: mturquette@baylibre.com, sboyd@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, drew@pdp7.com, guoren@kernel.org, wefu@redhat.com, jassisinghbrar@gmail.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, frank.binns@imgtec.com, matt.coster@imgtec.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, ulf.hansson@linaro.org, jszhang@kernel.org, p.zabel@pengutronix.de, m.szyprowski@samsung.com Cc: linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-pm@vger.kernel.org, Michal Wilczynski Subject: [RFC PATCH v2 04/19] dt-bindings: firmware: thead,th1520: Add support for firmware node Date: Mon, 23 Dec 2024 13:55:38 +0100 Message-Id: <20241223125553.3527812-5-m.wilczynski@samsung.com> X-Mailer: git-send-email 2.34.1 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CMS-TYPE: 201P X-CMS-RootMailID: 20241223125606eucas1p10ca3adc99322ff33d617a227733e5e67 References: <20241223125553.3527812-1-m.wilczynski@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241223_045608_622744_A1A29AAE X-CRM114-Status: GOOD ( 17.09 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The kernel communicates with the E902 core through the mailbox transport using AON firmware protocol. Add dt-bindings to document it the dt node. Signed-off-by: Michal Wilczynski --- .../bindings/firmware/thead,th1520-aon.yaml | 59 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 60 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..ca4c276766a3 --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml @@ -0,0 +1,59 @@ +# 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 Node + +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 + +properties: + compatible: + const: thead,th1520-aon + + mboxes: + maxItems: 1 + + mbox-names: + items: + - const: aon + + power-domain: + $ref: /schemas/power/thead,th1520-power.yaml# + description: Subnode representing the hardware power domain of the AON subsystem. + +additionalProperties: false + +required: + - compatible + - mboxes + - mbox-names + +examples: + - | + firmware { + aon: aon { + compatible = "thead,th1520-aon"; + mboxes = <&mbox_910t 1>; + mbox-names = "aon"; + + pd: power-domain { + compatible = "thead,th1520-pd"; + #power-domain-cells = <1>; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index c0e9639ac210..7705d1b6dd7a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -20188,6 +20188,7 @@ M: Fu Wei L: linux-riscv@lists.infradead.org S: Maintained T: git https://github.com/pdp7/linux.git +F: Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml F: Documentation/devicetree/bindings/clock/thead,th1520-clk-ap.yaml F: Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml F: Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml