From patchwork Thu May 29 22:23:48 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Wilczynski X-Patchwork-Id: 893515 Received: from mailout2.w1.samsung.com (mailout2.w1.samsung.com [210.118.77.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BA20521D5A9 for ; Thu, 29 May 2025 22:24:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.118.77.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748557455; cv=none; b=TcnDbhavkXp0DPNye+431e3LiA9HSpjtOyDOG+jLg0DJVPtysyaq4iFkxWfU6CEx4EfpmcARuFlmX6yxB+b7KYTn173OOJN79PPP6r5rSJwcqfcArhRj9U5QeHP+BEtvVs8lcO4JO+LfNqBtF0jAoi6irjCNHPBRadFJfoAfZ3E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748557455; c=relaxed/simple; bh=LKLrrWq8thhk1EMk6yfw2Nl2anZxcSL9JmtArSpirfg=; h=From:Date:Subject:MIME-Version:Message-Id:In-Reply-To:To:Cc: Content-Type:References; b=aDOIYviCIK4Y7uaAJU3vmaJZBgq9yAI/mLxqq/cLe9Qu34bWKjwbvwNxTE7tLgAS6Q4SDMVs/7riWuzvz+Ej9POHLoPG1E1+bRh44DraiVLTbFQTDYO+qWKCV85NGsLXS/ysEbzoaELNv2vQKQbDx3wdB/gOqcvojt55c7aL91k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=PdlwNPOP; arc=none smtp.client-ip=210.118.77.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="PdlwNPOP" Received: from eucas1p1.samsung.com (unknown [182.198.249.206]) by mailout2.w1.samsung.com (KnoxPortal) with ESMTP id 20250529222405euoutp020a3dece1e8a1113aea41cc1b8762e088~EH7uHzi_k2213722137euoutp02u for ; Thu, 29 May 2025 22:24:05 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.w1.samsung.com 20250529222405euoutp020a3dece1e8a1113aea41cc1b8762e088~EH7uHzi_k2213722137euoutp02u DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1748557445; bh=YWgZEAPcMH46NIGH2/oSKhwnvWs2dOgmME8UVmfVxfk=; h=From:Date:Subject:In-Reply-To:To:Cc:References:From; b=PdlwNPOP7Bq6mAnKXwUUKOtMzeH42uNn7zWl+n5xLfLi4AmEtVSivsrBSDR/3kAhM wPFrUy503C1TVlyEuXqJo/BRIgCHm1/2YKxlRUOQZCbGwPP0QsecSm0y7i1Yh2DE0p JJuXDfCPTdFS49H/jNLU1o7vwoAnJHKiRfzaaqA8= Received: from eusmtip2.samsung.com (unknown [203.254.199.222]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20250529222403eucas1p1923fe09240be34e3bbadf16822574d75~EH7sXLUlv2958729587eucas1p1j; Thu, 29 May 2025 22:24:03 +0000 (GMT) Received: from AMDC4942.eu.corp.samsungelectronics.net (unknown [106.210.136.40]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20250529222402eusmtip2d7d50774a6c6e15081addf3fce030b9c~EH7reGp5Y3031530315eusmtip2K; Thu, 29 May 2025 22:24:02 +0000 (GMT) From: Michal Wilczynski Date: Fri, 30 May 2025 00:23:48 +0200 Subject: [PATCH v3 1/8] dt-bindings: power: Add T-HEAD TH1520 GPU power sequencer Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250530-apr_14_for_sending-v3-1-83d5744d997c@samsung.com> In-Reply-To: <20250530-apr_14_for_sending-v3-0-83d5744d997c@samsung.com> To: Drew Fustini , Guo Ren , Fu Wei , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Michal Wilczynski , Bartosz Golaszewski , Philipp Zabel , Frank Binns , Matt Coster , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Ulf Hansson , Marek Szyprowski Cc: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org X-Mailer: b4 0.15-dev X-CMS-MailID: 20250529222403eucas1p1923fe09240be34e3bbadf16822574d75 X-Msg-Generator: CA X-RootMTR: 20250529222403eucas1p1923fe09240be34e3bbadf16822574d75 X-EPHeader: CA X-CMS-RootMailID: 20250529222403eucas1p1923fe09240be34e3bbadf16822574d75 References: <20250530-apr_14_for_sending-v3-0-83d5744d997c@samsung.com> Introduce device tree bindings for a new power sequencer provider dedicated to the T-HEAD TH1520 SoC's GPU. The thead,th1520-gpu-pwrseq compatible designates a node that will manage the complex power-up and power-down sequence for the GPU. This sequencer requires a handle to the GPU's clock generator reset line (gpu-clkgen), which is specified in its device tree node. This binding will be used by a new pwrseq driver to abstract the SoC specific power management details from the generic GPU driver. Signed-off-by: Michal Wilczynski --- .../bindings/power/thead,th1520-pwrseq.yaml | 42 ++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 43 insertions(+) diff --git a/Documentation/devicetree/bindings/power/thead,th1520-pwrseq.yaml b/Documentation/devicetree/bindings/power/thead,th1520-pwrseq.yaml new file mode 100644 index 0000000000000000000000000000000000000000..4c302abfb76fb9e243946f4eefa333c6b02e59d3 --- /dev/null +++ b/Documentation/devicetree/bindings/power/thead,th1520-pwrseq.yaml @@ -0,0 +1,42 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/thead,th1520-pwrseq.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: T-HEAD TH1520 GPU Power Sequencer + +maintainers: + - Michal Wilczynski + +description: | + This binding describes the power sequencer for the T-HEAD TH1520 GPU. + This sequencer handles the specific power-up and power-down sequences + required by the GPU, including managing clocks and resets from both the + sequencer and the GPU device itself. + +properties: + compatible: + const: thead,th1520-gpu-pwrseq + + resets: + description: A phandle to the GPU clock generator reset. + maxItems: 1 + + reset-names: + const: gpu-clkgen + +required: + - compatible + - resets + - reset-names + +additionalProperties: false + +examples: + - | + gpu_pwrseq: pwrseq { + compatible = "thead,th1520-gpu-pwrseq"; + resets = <&rst 0>; + reset-names = "gpu-clkgen"; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 0d59a5910e632350a4d72a761c6c5ce1d3a1bc34..78e3067df1152929de638244b03264733d08556e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21355,6 +21355,7 @@ 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 +F: Documentation/devicetree/bindings/power/thead,th1520-pwrseq.yaml F: Documentation/devicetree/bindings/reset/thead,th1520-reset.yaml F: arch/riscv/boot/dts/thead/ F: drivers/clk/thead/clk-th1520-ap.c