From patchwork Tue Jul 9 12:31:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 13727795 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 0A322C3DA47 for ; Tue, 9 Jul 2024 12:32:25 +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=CUSKijRkYP2c/rjAoHax8YGDcdf+G7V68MnEAefITNg=; b=vsVj7Dq1dMnncx 5Cgoo0BB2KGo/8fI1JIH8YfAoCknDU5VjcqNbqVukMRi6QQw0UnTZU8OThM2xDYe+EdW1F1uhLOMM aNW157rfqpuVKPN+mF94+eS75bNHePsToYJmPY4ySLeMlvucP/fWa4Eb3aL93UM/cCPJZvyAaNOqe GffiaMTuf+JDgl1jcz9GqbGRTbeekr2IoGXQs3IU7yQI4k1VGmZADzQnKgqvLaT+1q2W6209+wtdk pDrPNCjjVSV0pppYgTm7oW3yanSAZVhHdKqRAmTEJoKTsVYktAS+hj8RGd9Qi0kMOGVI9OM5sIPHA SycE+GdzLRaRMrtltf8g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sRA15-000000078X8-3pAQ; Tue, 09 Jul 2024 12:32:19 +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 1sRA0a-000000078Kx-0wCz; Tue, 09 Jul 2024 12:31:49 +0000 Received: from i5e860d18.versanet.de ([94.134.13.24] 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 1sRA0T-00074P-3S; Tue, 09 Jul 2024 14:31:41 +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, quentin.schulz@cherry.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 1/6] dt-bindings: clocks: add binding for generic clock-generators Date: Tue, 9 Jul 2024 14:31:16 +0200 Message-Id: <20240709123121.1452394-2-heiko@sntech.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240709123121.1452394-1-heiko@sntech.de> References: <20240709123121.1452394-1-heiko@sntech.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240709_053148_285370_A0FD7C7D X-CRM114-Status: GOOD ( 18.04 ) 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 clock generators 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 clock generators that are not configurable themself, but need to handle supplies for them to work. While in a lot of cases the type of the IC used is described in board schematics, in some cases just a generic type description like "100MHz, 3.3V" might also be used. The binding therefore allows both cases. Specifying the type is of course preferred. The clock-frequency is set in devicetree, because while some clock generators have pins to decide between multipls output rates, those are generally set statically on the board-layout-level. Signed-off-by: Heiko Stuebner --- .../bindings/clock/clock-generator.yaml | 62 +++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/clock-generator.yaml diff --git a/Documentation/devicetree/bindings/clock/clock-generator.yaml b/Documentation/devicetree/bindings/clock/clock-generator.yaml new file mode 100644 index 0000000000000..f44e61e414e89 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/clock-generator.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/clock-generator.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Simple clock generators + +maintainers: + - Heiko Stuebner + +properties: + $nodename: + anyOf: + - description: + Preferred name is 'clock-' with being the output + frequency as defined in the 'clock-frequency' property. + pattern: "^clock-([0-9]+|[a-z0-9-]+)$" + - description: Any name allowed + deprecated: true + + compatible: + oneOf: + - const: clock-generator + - items: + - enum: + - diodes,pi6c557-03b + - diodes,pi6c557-05b + - const: clock-generator + + "#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 clock generator. + maxItems: 1 + + vdd-supply: + description: handle of the regulator that provides the supply voltage + +required: + - compatible + - "#clock-cells" + - clock-frequency + +additionalProperties: false + +examples: + - | + clock { + compatible = "clock-generator"; + #clock-cells = <0>; + clock-frequency = <1000000000>; + }; +...