From patchwork Fri Sep 6 08:25:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 13793712 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B38EBCE7AE8 for ; Fri, 6 Sep 2024 08:36:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=QLt5ROu80qBeLulyysZjT7aHie2yMAENhMSfHIXMOWc=; b=0+p+mZGWT1z6CYXbkQg4jxDSWU dJJZ0Is41PCYKynZVp186wH5T4mQ5J/X+fG8JNKJKgle+RWH3EmvqYzint8cLYaeus/yEz06w4ZWt wadiLnRi3C8Rps/4v0j/TnJTen0hHtrX9mWwufXufzLejW1OKn5T0peohHDTp9VVnMQQqbqKBPQ4j jpeKdNkTz6bjqNhaES46tyHrzsdoEAFwO4eX63bRwooF7JU24W0zCeaj9dMD91NHqRlpEN2ZpJ3bP R23B90mHFxq7QnaZK789xrTyWkibaga7ME/KO/lwfwb0g8BQUpQKbFIlkXeI5tEXoiiMMnlqCmvKR wiJX0GMQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1smUS3-0000000BMBM-2MEs; Fri, 06 Sep 2024 08:36:19 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1smUHU-0000000BIre-2152; Fri, 06 Sep 2024 08:25:26 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sntech.de; s=gloria202408; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=QLt5ROu80qBeLulyysZjT7aHie2yMAENhMSfHIXMOWc=; b=DjQGJgq/ozrgD2AaOtIPaA5vBH nJ849xmtFv3gWbWX/w/rMplyVT8U77tAIPar4rP2kJ68acfvOrVGkyE+QwKO/d0yhIiB41VU46KI3 0fi+l+6o3vXqW/bEWyqdEvhQER1iNUJLwdk2TeOciZNq/XBlC59onC9mFs+SiNnhVm790pcRD+Pnq 7f5BxJfFRfFQgViHPjxk2YpgNNirVH6Y84gsx9+dgNkc6CUzg75MslfQSVWzc5CUnn/OAcwQWsC2v ydliDLTnoNMTm7K2FA1K/6Lg97cw+H2b5ccrmemIMoYefA9KlTSvpGzbgp0VLdvffGuvlSpTvcL6v 8t6wxXmw==; Received: from i5e860d0f.versanet.de ([94.134.13.15] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1smUHO-0000jF-Pt; Fri, 06 Sep 2024 10:25:18 +0200 From: Heiko Stuebner To: mturquette@baylibre.com, sboyd@kernel.org Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-clk@vger.kernel.org, heiko@sntech.de, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, Conor Dooley Subject: [PATCH v4 1/5] dt-bindings: clocks: add binding for gated-fixed-clocks Date: Fri, 6 Sep 2024 10:25:07 +0200 Message-ID: <20240906082511.2963890-2-heiko@sntech.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240906082511.2963890-1-heiko@sntech.de> References: <20240906082511.2963890-1-heiko@sntech.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240906_012524_683155_B0E8E735 X-CRM114-Status: GOOD ( 16.39 ) 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 In contrast to fixed clocks that are described as ungateable, boards sometimes use additional oscillators for things like PCIe reference clocks, that need actual supplies to get enabled and enable-gpios to be toggled for them to work. This adds a binding for such oscillators that are not configurable themself, but need to handle supplies for them to work. In schematics they often can be seen as ---------------- Enable - | 100MHz,3.3V, | - VDD | 3225 | GND - | | - OUT ---------------- or similar. The enable pin might be separate but can also just be tied to the vdd supply, hence it is optional in the binding. Signed-off-by: Heiko Stuebner Reviewed-by: Rob Herring (Arm) Reviewed-by: Conor Dooley --- .../bindings/clock/gated-fixed-clock.yaml | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/gated-fixed-clock.yaml diff --git a/Documentation/devicetree/bindings/clock/gated-fixed-clock.yaml b/Documentation/devicetree/bindings/clock/gated-fixed-clock.yaml new file mode 100644 index 000000000000..d3e0faf3c64d --- /dev/null +++ b/Documentation/devicetree/bindings/clock/gated-fixed-clock.yaml @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/gated-fixed-clock.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Gated Fixed clock + +maintainers: + - Heiko Stuebner + +properties: + compatible: + const: gated-fixed-clock + + "#clock-cells": + const: 0 + + clock-frequency: true + + clock-output-names: + maxItems: 1 + + enable-gpios: + description: + Contains a single GPIO specifier for the GPIO that enables and disables + the oscillator. + maxItems: 1 + + vdd-supply: + description: handle of the regulator that provides the supply voltage + +required: + - compatible + - "#clock-cells" + - clock-frequency + - vdd-supply + +additionalProperties: false + +examples: + - | + clock-1000000000 { + compatible = "gated-fixed-clock"; + #clock-cells = <0>; + clock-frequency = <1000000000>; + vdd-supply = <®_vdd>; + }; +...