From patchwork Tue Sep 14 15:56:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 12494115 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45F67C433FE for ; Tue, 14 Sep 2021 15:56:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3211761247 for ; Tue, 14 Sep 2021 15:56:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235062AbhINP5l (ORCPT ); Tue, 14 Sep 2021 11:57:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235175AbhINP5j (ORCPT ); Tue, 14 Sep 2021 11:57:39 -0400 Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92651C0613DE for ; Tue, 14 Sep 2021 08:56:18 -0700 (PDT) Received: by mail-lf1-x12e.google.com with SMTP id k4so29862032lfj.7 for ; Tue, 14 Sep 2021 08:56:18 -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=UdtBNSndqezkgUCZK/aPcnCoX2AuIjJfi+pll+tbfu4=; b=g8cxacfT+/ai4kPw+ik31qpT+ZUzpjMs5LF7pqDV22qKcASeYcGNlusP975G2tlASF QrV2d1mvQ0/3wddAC/DpuLjlkKkwd4oHJ6/GJ2eibEbsbAZ1SRJYUr6tmGeq+9oMCoTC yEhaf8zNRq5biIqyBESYG+GV7EdmYt4Mn2IoVXafz0wZHJBDgR30FRaqacMQulRAY8RG G9KFxUEo2Ga1A0Ir80qolXKuPjxCgN8ZPc5wyG6Z4cVuzOXUECXDINnpPKIX8wOIS+gr JTYnRL3mR7fHm2UzUzwrl931slpb+hicqTTHlaBiHQSI2ppjleVqZPhss3ypP0GtMNPS qXIw== 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=UdtBNSndqezkgUCZK/aPcnCoX2AuIjJfi+pll+tbfu4=; b=5frbljTHP/seEMoFNPm4GcELOIV6lCcVJZ/Ej+/yNAORd3Kx7qamJCFQe5ZeLT3BMz Oq81TrtGUt/alIJCYrz3E5g7Vobr0C8oJaTR/5byn43f/hsavmMTWf3DNbG09wDNOjkP LWlqFhXpfH2R79POIFFvjHqgyJCDnOe5Dv//Isgu4V+K06YT1nvgIfQx8hc9z6kGckyj YWTUBvMxjJ4+vNQuAU7VzMcQ2jTtcWp+F9sUe8dL3HVv/+ohHbMM3kDdXRo5+ql5kgrD MU9Lb7znFjl+j5kP9A5517R+CU7jb5d0ZGkrYkk3yTaNsubzVZSwidzsUlHDl8I0nnbl aI+A== X-Gm-Message-State: AOAM530ymyKWHGHRPXLQ4VKIBKPHz2Y+tkZF3aL9zJsOaARzFGJ1Q0pQ Rje3CVFRYf458h4aMwZwkcZtgA== X-Google-Smtp-Source: ABdhPJx/2G0XiWmWet2J+/qkYKNaaQl5EHW2IKOwfp4e4Q0xnIH4fz25bJRLQ0DUPEW6AJgf8NwWZA== X-Received: by 2002:a05:6512:12d4:: with SMTP id p20mr248929lfg.328.1631634976923; Tue, 14 Sep 2021 08:56:16 -0700 (PDT) Received: from localhost ([31.134.121.151]) by smtp.gmail.com with ESMTPSA id f40sm1232471lfv.210.2021.09.14.08.56.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Sep 2021 08:56:16 -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 5/6] dt-bindings: clock: Document Exynos850 CMU bindings Date: Tue, 14 Sep 2021 18:56:06 +0300 Message-Id: <20210914155607.14122-6-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210914155607.14122-1-semen.protsenko@linaro.org> References: <20210914155607.14122-1-semen.protsenko@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Provide dt-schema documentation for Exynos850 SoC clock controller. Signed-off-by: Sam Protsenko Acked-by: Chanwoo Choi --- .../clock/samsung,exynos850-clock.yaml | 190 ++++++++++++++++++ 1 file changed, 190 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..b69ba4125421 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/samsung,exynos850-clock.yaml @@ -0,0 +1,190 @@ +# 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-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-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 DOUT_PERI_BUS>, + <&cmu_top DOUT_PERI_UART>, + <&cmu_top DOUT_PERI_IP>; + clock-names = "oscclk", "dout_peri_bus", + "dout_peri_uart", "dout_peri_ip"; + }; + + # External reference clock (should be provided in particular board DTS) + - | + oscclk: clock-oscclk { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-output-names = "oscclk"; + clock-frequency = <26000000>; + }; + + # UART controller node that consumes the clock generated by CMU_PERI + - | + #include + #include + + serial_0: serial@13820000 { + compatible = "samsung,exynos850-uart"; + reg = <0x13820000 0x100>; + interrupts = ; + pinctrl-names = "default"; + pinctrl-0 = <&uart0_pins>; + clocks = <&cmu_peri GOUT_UART_PCLK>, <&cmu_peri GOUT_UART_IPCLK>; + clock-names = "uart", "clk_uart_baud0"; + }; + +...