From patchwork Sun Dec 5 15:32:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: David Virag X-Patchwork-Id: 520903 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40D9CC4321E for ; Sun, 5 Dec 2021 15:34:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235732AbhLEPiU (ORCPT ); Sun, 5 Dec 2021 10:38:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49808 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235753AbhLEPiS (ORCPT ); Sun, 5 Dec 2021 10:38:18 -0500 Received: from mail-ed1-x533.google.com (mail-ed1-x533.google.com [IPv6:2a00:1450:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F63FC061714; Sun, 5 Dec 2021 07:34:51 -0800 (PST) Received: by mail-ed1-x533.google.com with SMTP id o20so32706387eds.10; Sun, 05 Dec 2021 07:34:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=AX47zXX0gETNKhJBGlDEZHhKpmZEISduk5IYp/j7Q7E=; b=qPy1LSM/bc+f3rh7Qgn3C13PCneG+hWi51QdaoVKzBknyo4el6uf2luYOavQJk6J3z jzdc73sJ6yirW/Gc6hforM//CA3kFi8yqa6O9NJ05RGp81fiv6ovvBOHHKisLLYm4GoU BkLXjUDm9zCm21CeFTrHGW9cbxNE9886LRzNCp5ryUMpX7V9+pcfl83ESS9bdu3+f2kL SXRXG3cPuk33AVlPcmratKHIw6EYRfqK0CXSbs/TC4S1zyjRWeqmJNDNUJamVe7UDml8 ecfrn1z7DolJ1aWEQIHs9SJCt9G3U8cPv4EJB6qY4xL7aOycUdla3e0d3cQKA7kSVme0 BMdA== 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=AX47zXX0gETNKhJBGlDEZHhKpmZEISduk5IYp/j7Q7E=; b=a6NYpOFR6z1Tnd5rETaIYNrVKaS91C+3JyCojwIG+YX7HyVrO5CFfKLLWwkyLAuMiM 8IOkh+MW76r2EeUKr+0ZqYmBpWkCyog9aM7E2Ccm+lRKYsKhiw9ZCANy+ex9Q2xq2UYY mc6/gcu3zoaSLEfjULytyhc9NVY3U6kFVAmMC73neAHijifIlECN8tvAQtQYpt1+bqlI mxJTiJjkR/rdHZWUvII71t702eSkUKm4Tbdelq2EOEp457FdaTL2wzIX9Bc3cxAGeUJf JICmOnuUcuQX91HT5hkxL/5lauuQ2j4uaP0zA8uNtiZfe/UGXJY86GAqUve0ErouloTZ i3hw== X-Gm-Message-State: AOAM533u4gUQTwRzbK2ZT/TRNeGMrKs9oeP9/apoTa4tDFslIfQun+Wm HmOkkQzW00tS0yAC5GcI+r0= X-Google-Smtp-Source: ABdhPJwvZXpmt/vV6sm8ytYCNhmlDBEs37v3gyaCcGRaD3FAh56ApvpC2DhNDY1rgeTDmJ1tkLkecw== X-Received: by 2002:a17:907:d22:: with SMTP id gn34mr39044572ejc.195.1638718490033; Sun, 05 Dec 2021 07:34:50 -0800 (PST) Received: from localhost.localdomain ([2a02:ab88:368f:2080:eab:126a:947d:3008]) by smtp.googlemail.com with ESMTPSA id sa17sm5529941ejc.123.2021.12.05.07.34.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Dec 2021 07:34:49 -0800 (PST) From: David Virag Cc: David Virag , Krzysztof Kozlowski , Rob Herring , Sylwester Nawrocki , Tomasz Figa , Chanwoo Choi , Michael Turquette , Stephen Boyd , linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org Subject: [PATCH 3/6] dt-bindings: clock: Document Exynos7885 CMU bindings Date: Sun, 5 Dec 2021 16:32:57 +0100 Message-Id: <20211205153302.76418-4-virag.david003@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211205153302.76418-1-virag.david003@gmail.com> References: <20211205153302.76418-1-virag.david003@gmail.com> MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Provide dt-schema documentation for Exynos7885 SoC clock controller. Description is modified from Exynos850 clock controller documentation as I couldn't describe it any better, that was written by Sam Protsenko. Signed-off-by: David Virag Reviewed-by: Krzysztof Kozlowski --- .../clock/samsung,exynos7885-clock.yaml | 166 ++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/samsung,exynos7885-clock.yaml diff --git a/Documentation/devicetree/bindings/clock/samsung,exynos7885-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynos7885-clock.yaml new file mode 100644 index 000000000000..9ec7358889d6 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/samsung,exynos7885-clock.yaml @@ -0,0 +1,166 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/samsung,exynos7885-clock.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Samsung Exynos7885 SoC clock controller + +maintainers: + - Dávid Virág + - Chanwoo Choi + - Krzysztof Kozlowski + - Sylwester Nawrocki + - Tomasz Figa + +description: | + Exynos7885 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. The root clock in that root tree + is an external clock:: OSCCLK (26 MHz). This external clock must be defined + as a fixed-rate clock 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 available for usage + in clock consumer nodes are defined as preprocessor macros in + 'dt-bindings/clock/exynos7885.h' header. + +properties: + compatible: + enum: + - samsung,exynos7885-cmu-top + - samsung,exynos7885-cmu-core + - samsung,exynos7885-cmu-peri + + clocks: + minItems: 1 + maxItems: 10 + + clock-names: + minItems: 1 + maxItems: 10 + + "#clock-cells": + const: 1 + + reg: + maxItems: 1 + +allOf: + - if: + properties: + compatible: + contains: + const: samsung,exynos7885-cmu-top + + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + + clock-names: + items: + - const: oscclk + + - if: + properties: + compatible: + contains: + const: samsung,exynos7885-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: G3D clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: dout_core_bus + - const: dout_core_cci + - const: dout_core_g3d + + - if: + properties: + compatible: + contains: + const: samsung,exynos7885-cmu-peri + + then: + properties: + clocks: + items: + - description: External reference clock (26 MHz) + - description: CMU_PERI bus clock (from CMU_TOP) + - description: SPI0 clock (from CMU_TOP) + - description: SPI1 clock (from CMU_TOP) + - description: UART0 clock (from CMU_TOP) + - description: UART1 clock (from CMU_TOP) + - description: UART2 clock (from CMU_TOP) + - description: USI0 clock (from CMU_TOP) + - description: USI1 clock (from CMU_TOP) + - description: USI2 clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: dout_peri_bus + - const: dout_peri_spi0 + - const: dout_peri_spi1 + - const: dout_peri_uart0 + - const: dout_peri_uart1 + - const: dout_peri_uart2 + - const: dout_peri_usi0 + - const: dout_peri_usi1 + - const: dout_peri_usi2 + +required: + - compatible + - "#clock-cells" + - clocks + - clock-names + - reg + +additionalProperties: false + +examples: + # Clock controller node for CMU_PERI + - | + #include + + cmu_peri: clock-controller@0x10010000 { + compatible = "samsung,exynos7885-cmu-peri"; + reg = <0x10010000 0x8000>; + #clock-cells = <1>; + + clocks = <&oscclk>, + <&cmu_top CLK_DOUT_PERI_BUS>, + <&cmu_top CLK_DOUT_PERI_SPI0>, + <&cmu_top CLK_DOUT_PERI_SPI1>, + <&cmu_top CLK_DOUT_PERI_UART0>, + <&cmu_top CLK_DOUT_PERI_UART1>, + <&cmu_top CLK_DOUT_PERI_UART2>, + <&cmu_top CLK_DOUT_PERI_USI0>, + <&cmu_top CLK_DOUT_PERI_USI1>, + <&cmu_top CLK_DOUT_PERI_USI2>; + clock-names = "oscclk", + "dout_peri_bus", + "dout_peri_spi0", + "dout_peri_spi1", + "dout_peri_uart0", + "dout_peri_uart1", + "dout_peri_uart2", + "dout_peri_usi0", + "dout_peri_usi1", + "dout_peri_usi2"; + }; + +...