From patchwork Mon Jul 15 11:02:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 13733328 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 A1F75C3DA5D for ; Mon, 15 Jul 2024 11:04:53 +0000 (UTC) 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=HOqWqYb+FJQKJZl5k+L3jjD1mpEUUckBk5L9dv7JDwQ=; b=k2yxN6dd+pekNl AKIuhXPmFM3J0PRKD73QzGZ2RL3U8sGEU1ExGc/1A4WWloq5SWsJRktejQ+tXbTzP9M/DhV9GcmXz f8SAKmZ1MPJulUwo2eDdrRMQM3EqSx3QkmwSjkEW5wyd30AGI3cjs0KuJKPyy8QFm+iYfWcqFaAVp 5dRrTad7VYPNYYgxTOXFtL3Cbk+3hE7HFlMQ2IsWY+FANRi4QJMMNcHBVsBABWQwLwqGC0vX+Rlqk PlD45ErHzMHZwg6LnEG+BEyc0GtTBlsKQo+RpVrRKlJ8Adgp3OsOdURKb/xbQdZK3n3wqD9MhSdY6 96RJtPp9+i5fVYLZ6MxA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sTJVj-00000006oLG-046V; Mon, 15 Jul 2024 11:04:51 +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 1sTJV8-00000006o9G-2xD9; Mon, 15 Jul 2024 11:04:16 +0000 Received: from i5e860d09.versanet.de ([94.134.13.9] 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 1sTJV3-0006GM-KP; Mon, 15 Jul 2024 13:04:09 +0200 From: Heiko Stuebner To: mturquette@baylibre.com, sboyd@kernel.org Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, heiko@sntech.de, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org Subject: [PATCH v2 1/3] dt-bindings: clocks: add binding for voltage-controlled-oscillators Date: Mon, 15 Jul 2024 13:02:49 +0200 Message-Id: <20240715110251.261844-2-heiko@sntech.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240715110251.261844-1-heiko@sntech.de> References: <20240715110251.261844-1-heiko@sntech.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240715_040414_763395_8E5B3082 X-CRM114-Status: GOOD ( 16.49 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=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 --- .../bindings/clock/voltage-oscillator.yaml | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/voltage-oscillator.yaml diff --git a/Documentation/devicetree/bindings/clock/voltage-oscillator.yaml b/Documentation/devicetree/bindings/clock/voltage-oscillator.yaml new file mode 100644 index 0000000000000..8bff6b0fd582e --- /dev/null +++ b/Documentation/devicetree/bindings/clock/voltage-oscillator.yaml @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/voltage-oscillator.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Voltage controlled oscillator + +maintainers: + - Heiko Stuebner + +properties: + compatible: + const: voltage-oscillator + + "#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: + - | + voltage-oscillator { + compatible = "voltage-oscillator"; + #clock-cells = <0>; + clock-frequency = <1000000000>; + vdd-supply = <®_vdd>; + }; +...