From patchwork Thu Oct 7 19:41:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 12542903 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43EE5C433EF for ; Thu, 7 Oct 2021 19:43:35 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0FDB660FC2 for ; Thu, 7 Oct 2021 19:43:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0FDB660FC2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=t1ev0m863+JiEYb8GrfxNTK5U55KiFpHJEJOLIoNTes=; b=00VWM6tb7HSfni XQ+lu8akjYJTf/TZWYBSVmCEyZLY0PHqeUUzMlSrt+QTASWgPL15C5nSJjksthJ431a/4cSsu7YxJ 0GfS/GTedA5iahdqNpc0JbaX++g3KWCCMKflKU1LSD05r49to32BLZ+RxY7HtpOwkWBZ6lg7JXJQm edT77KFLEqHddtnt88vmMFSb853AiGHRSAMqJIA1EX05yrvy2lJ8GKt0mID17L9Z7bcurvDa+riN8 5EfzpG8g4yF9zMEFYSeU4nzeTXBIwzZ5rBtQV/Hc34Se2mtHHO+38DVHFYejTCZ2HPn+PNWNLwxzN arkLNtX10bxMJkphog2Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mYZHK-000awg-01; Thu, 07 Oct 2021 19:42:06 +0000 Received: from mail-lf1-x12f.google.com ([2a00:1450:4864:20::12f]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mYZGd-000amw-Au for linux-arm-kernel@lists.infradead.org; Thu, 07 Oct 2021 19:41:25 +0000 Received: by mail-lf1-x12f.google.com with SMTP id x27so29293245lfa.9 for ; Thu, 07 Oct 2021 12:41:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=6qypjTcxQ7XQKBuiOwqn5g+UY0WDWTYynbpPAmde6MA=; b=Byf34ukrpWPrWz8IZz8w9qcSwzWA8mrQitD8/gm5xPSQ7A4U73QOfddicwA8aQ/PZq VE//d6HefRiFkfqe2GBFGKAkOFdSHgusQ7f+sTS5XBaef4a64B4E/XwwJoqaXLuUn8aV D3aDiCpaXxCokr4X1iW5AnUdcqlylPxOPCv8joD7BWcBBhmNo6pj97F+8g2QI6aEpmLM QMAdhm0Vw3cq/fBfgJqQL/lvQLKoRgHfyu/nIOYyiOGHnhqKC3LjUKdLwXKZdPFIB42X Cd04GRckN28UJM7C2wXsW86nT1mGeY7mIATawdeZT+5lZ0L+ke89XCq3bfwFBI4ayzHA PCDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=6qypjTcxQ7XQKBuiOwqn5g+UY0WDWTYynbpPAmde6MA=; b=uxWi7ifM5OQU+WeNqSKFOsQl+/sz3J2I6uzNrCXvI6uOsAvGO2TA7iM4ZzdF5ytxse qDYOMwMDpBsyhpzNDPGslRXAPhXkoi2d12HJG3C7RLHJHqrXu+BujgGbIrFMrCdjbZ6u l+NvlD6yM3SdLyPR+pYFNTBiE0OUOc23q5qz708/s/G8Rqed3FnStFM8rjQHfHVAmbcK nxzr3xIOBQ2LZQdi7GDWQD+Lz1erDBwY1OasNCPuAok8lgh/LVSaj05bBKn+TA11DsQ3 EYnfO1n9aUk5YMY0SmPKJPl+qkFlhc96n7Ri0r5XEO+AwxHIwtZNrIvbJMHhOBxo+eHN WHwA== X-Gm-Message-State: AOAM531ckV1jT0s1q/Nm71lfsZG8IC1zdHFgrZnEkPgqYSemBN4OsmJU 3WbGAY8t/OOvEQK3SVALj20xlQ== X-Google-Smtp-Source: ABdhPJw1QADHTDExJHD/8BVAYf2IKTwIG+OK6TZHVQtQj1M1kyPY0A+Xpq0zE3Hc6qlvMAIy+T80TA== X-Received: by 2002:a05:6512:692:: with SMTP id t18mr5618211lfe.572.1633635681608; Thu, 07 Oct 2021 12:41:21 -0700 (PDT) Received: from localhost ([31.134.121.151]) by smtp.gmail.com with ESMTPSA id r11sm22598lfn.224.2021.10.07.12.41.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Oct 2021 12:41:21 -0700 (PDT) From: Sam Protsenko To: Krzysztof Kozlowski , Sylwester Nawrocki , =?utf-8?q?Pawe=C5=82_Chmiel?= , Chanwoo Choi , Tomasz Figa , Rob Herring , Stephen Boyd , Michael Turquette Cc: Ryu Euiyoul , Tom Gall , Sumit Semwal , John Stultz , Amit Pundir , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH v2 4/5] dt-bindings: clock: Document Exynos850 CMU bindings Date: Thu, 7 Oct 2021 22:41:12 +0300 Message-Id: <20211007194113.10507-5-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211007194113.10507-1-semen.protsenko@linaro.org> References: <20211007194113.10507-1-semen.protsenko@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211007_124123_404913_6CF29C1D X-CRM114-Status: GOOD ( 16.72 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Provide dt-schema documentation for Exynos850 SoC clock controller. Signed-off-by: Sam Protsenko Acked-by: Chanwoo Choi Reviewed-by: Krzysztof Kozlowski --- Changes in v2: - Dropped OSCCLK node declaration example - Dropped UART node declaration example - Added Ack tag by Chanwoo Choi .../clock/samsung,exynos850-clock.yaml | 185 ++++++++++++++++++ 1 file changed, 185 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml diff --git a/Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml new file mode 100644 index 000000000000..79202e6e6402 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml @@ -0,0 +1,185 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/samsung,exynos850-clock.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Samsung Exynos850 SoC clock controller + +maintainers: + - Sam Protsenko + - Chanwoo Choi + - Krzysztof Kozlowski + - Sylwester Nawrocki + - Tomasz Figa + +description: | + Exynos850 clock controller is comprised of several CMU units, generating + clocks for different domains. Those CMU units are modeled as separate device + tree nodes, and might depend on each other. Root clocks in that clock tree are + two external clocks:: OSCCLK (26 MHz) and RTCCLK (32768 Hz). Those external + clocks must be defined as fixed-rate clocks in dts. + + CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and + dividers; all other leaf clocks (other CMUs) are usually derived from CMU_TOP. + + Each clock is assigned an identifier and client nodes can use this identifier + to specify the clock which they consume. All clocks that available for usage + in clock consumer nodes are defined as preprocessor macros in + 'dt-bindings/clock/exynos850.h' header. + +properties: + compatible: + enum: + - samsung,exynos850-cmu-top + - samsung,exynos850-cmu-core + - samsung,exynos850-cmu-dpu + - samsung,exynos850-cmu-hsi + - samsung,exynos850-cmu-peri + + clocks: + minItems: 1 + maxItems: 5 + + clock-names: + minItems: 1 + maxItems: 5 + + "#clock-cells": + const: 1 + + reg: + maxItems: 1 + +allOf: + - if: + properties: + compatible: + contains: + const: samsung,exynos850-cmu-top + + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + + clock-names: + items: + - const: oscclk + + - if: + properties: + compatible: + contains: + const: samsung,exynos850-cmu-core + + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: CMU_CORE bus clock (from CMU_TOP) + - description: CCI clock (from CMU_TOP) + - description: eMMC clock (from CMU_TOP) + - description: SSS clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: dout_core_bus + - const: dout_core_cci + - const: dout_core_mmc_embd + - const: dout_core_sss + + - if: + properties: + compatible: + contains: + const: samsung,exynos850-cmu-dpu + + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: DPU clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: dout_dpu + + - if: + properties: + compatible: + contains: + const: samsung,exynos850-cmu-hsi + + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: External RTC clock (32768 Hz) + - description: CMU_HSI bus clock (from CMU_TOP) + - description: SD card clock (from CMU_TOP) + - description: "USB 2.0 DRD clock (from CMU_TOP)" + + clock-names: + items: + - const: oscclk + - const: rtcclk + - const: dout_hsi_bus + - const: dout_hsi_mmc_card + - const: dout_hsi_usb20drd + + - if: + properties: + compatible: + contains: + const: samsung,exynos850-cmu-peri + + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: CMU_PERI bus clock (from CMU_TOP) + - description: UART clock (from CMU_TOP) + - description: Parent clock for HSI2C and SPI (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: dout_peri_bus + - const: dout_peri_uart + - const: dout_peri_ip + +required: + - compatible + - "#clock-cells" + - clocks + - clock-names + - reg + +additionalProperties: false + +examples: + # Clock controller node for CMU_PERI + - | + #include + + cmu_peri: clock-controller@10030000 { + compatible = "samsung,exynos850-cmu-peri"; + reg = <0x10030000 0x8000>; + #clock-cells = <1>; + + clocks = <&oscclk>, <&cmu_top CLK_DOUT_PERI_BUS>, + <&cmu_top CLK_DOUT_PERI_UART>, + <&cmu_top CLK_DOUT_PERI_IP>; + clock-names = "oscclk", "dout_peri_bus", + "dout_peri_uart", "dout_peri_ip"; + }; + +...