From mboxrd@z Thu Jan 1 00:00:00 1970 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 F223DC38150 for ; Wed, 10 Jul 2024 07:03:12 +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-Type: Content-Transfer-Encoding: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=w75KCVl1Td1dl0039xM1BsGqYrMvcTNH87jh0lAScys=; b=zzbHvLoCP8VLq8OI5UkFFDbDF1 GX8BJ/HQtgUGj3Bq5+JOXmW6zJKLoG7w2cxNvgX/j+8Qm4yAJz6TJ2al4Gv3I/mqg6a/oSMBTAX81 Izx8H0p3BZVxRr872tpYCcyC8BhiTYBf83khmbWkpGGQs7huidRQ4hqrsh0iIcWeGLWYcIObhPYpz veZ3LzJ1h+DVUJOrqoL8ghC5W7sKRuTGja/UJbAiO/W6fR45cfVLbrrcQI88DuTLA9PF1W3oadvw0 Jz9XuNu8hFg3DFZq0YCqVG1/5Pxq+W75IxRzufYIbSA8Udp/mXy6OzQFcDuT8RxzovOCHcInl18d5 thokNOUw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sRRLv-00000009gTj-2ppW; Wed, 10 Jul 2024 07:02:59 +0000 Received: from mx1.tq-group.com ([93.104.207.81]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sRRLe-00000009gS8-1n7s; Wed, 10 Jul 2024 07:02:44 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tq-group.com; i=@tq-group.com; q=dns/txt; s=key1; t=1720594962; x=1752130962; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=w75KCVl1Td1dl0039xM1BsGqYrMvcTNH87jh0lAScys=; b=a+pPPzrkryDZShBAERhpwH14V3l/EnLSRBTQAxKcZGdBx7NPygs0qaCR T0+NUSzPntLYNC3lGRFjhRxqy9ABTFE4x01zbokgtyUzsZPGiMIgdIIBa AAkZsPBByVL1Yvy5m0zuCtXUymBkVwhm7JP4xpAt2tkWRCqmYYTPV2GAw hPJfreozmfMnt4YR9AR/WzM2skPz6nQurXhgfp0NwxvvDi//gu7eXKYfk AAlUn8R0aCGtPW6Kdld9WfDSsCaR4pqeee4NIvEfXVDXfvRqXNLYPYbYJ aIVDH4wzYWeI/UtXCVNqHa8HA7BqiW+UIIiKVvH2WMUu+wMjTO14pXDG/ Q==; X-CSE-ConnectionGUID: 2yIqFFj+QO6gEzYvhSB3Wg== X-CSE-MsgGUID: atSQGguxQDaJCRTyhvgKTw== X-IronPort-AV: E=Sophos;i="6.09,197,1716242400"; d="scan'208";a="37830570" Received: from vmailcow01.tq-net.de ([10.150.86.48]) by mx1.tq-group.com with ESMTP; 10 Jul 2024 09:02:37 +0200 Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 97D90160B01; Wed, 10 Jul 2024 09:02:28 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ew.tq-group.com; s=dkim; t=1720594953; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=w75KCVl1Td1dl0039xM1BsGqYrMvcTNH87jh0lAScys=; b=baMM5hTKK9U7Kk5F66IsBtrSnvDEhXUiejxLGjkaw95uST9cvyVdd3IxVt090QStWpibyV VJZcGODYCWb/Bx+Lh456quPMQSVTAf5XxJSeSVoGWjSlF+KJ629MalaZPPfEFct9L7NQb6 pNVqBRZ6Q2WEgrox/ZQF0CBgdrven+rhl6d5JwnAvBllYr7AfNWYcQxIqbFnCZwYCVuMEt dWKJCxIng/pTW2Uv+Zn0abkCi/lvVqtLonOOY/16o+ZWGaIRXLEQIhC9+kkN/nqx0tHQdM Ku2kz+RQhsyw6j3crdk2XhXf0WcXVINXstho9z3T+Gbg4v1/gbkKRLjyORU0lw== From: Alexander Stein To: mturquette@baylibre.com, sboyd@kernel.org, Heiko Stuebner 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: Re: [PATCH 1/6] dt-bindings: clocks: add binding for generic clock-generators Date: Wed, 10 Jul 2024 09:02:34 +0200 Message-ID: <12478313.O9o76ZdvQC@steina-w> Organization: TQ-Systems GmbH In-Reply-To: <20240709123121.1452394-2-heiko@sntech.de> References: <20240709123121.1452394-1-heiko@sntech.de> <20240709123121.1452394-2-heiko@sntech.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240710_000242_984556_12244959 X-CRM114-Status: GOOD ( 23.22 ) 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 Hello Heiko, Am Dienstag, 9. Juli 2024, 14:31:16 CEST schrieb Heiko Stuebner: > 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. =46ixed clocks are intended to be ungateable? Where does this come from? > This adds a binding for such clock generators that are not configurable > themself, but need to handle supplies for them to work. >=20 > 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. >=20 > 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. >=20 > Signed-off-by: Heiko Stuebner > --- > .../bindings/clock/clock-generator.yaml | 62 +++++++++++++++++++ > 1 file changed, 62 insertions(+) > create mode 100644 Documentation/devicetree/bindings/clock/clock-generat= or.yaml >=20 > 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 dis= ables > + the clock generator. > + maxItems: 1 > + > + vdd-supply: > + description: handle of the regulator that provides the supply voltage So essentially only enable-gpios and vdd-supply is added in comparison to fixed-clock. Does it make sense to add that to the fixed-clocks instead? Similar to fixed-regulator. > + > +required: > + - compatible > + - "#clock-cells" > + - clock-frequency With this list it's essentially the same as fixed-clock. Best regards, Alexander > + > +additionalProperties: false > + > +examples: > + - | > + clock { > + compatible =3D "clock-generator"; > + #clock-cells =3D <0>; > + clock-frequency =3D <1000000000>; > + }; > +... >=20 =2D-=20 TQ-Systems GmbH | M=FChlstra=DFe 2, Gut Delling | 82229 Seefeld, Germany Amtsgericht M=FCnchen, HRB 105018 Gesch=E4ftsf=FChrer: Detlef Schneider, R=FCdiger Stahl, Stefan Schneider http://www.tq-group.com/