From patchwork Tue Feb 8 18:34:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Martin_Povi=C5=A1er?= X-Patchwork-Id: 540874 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 871A7C43219 for ; Tue, 8 Feb 2022 18:41:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1385093AbiBHSlq (ORCPT ); Tue, 8 Feb 2022 13:41:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36354 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1385074AbiBHSlm (ORCPT ); Tue, 8 Feb 2022 13:41:42 -0500 X-Greylist: delayed 402 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Tue, 08 Feb 2022 10:41:39 PST Received: from hutie.ust.cz (hutie.ust.cz [185.8.165.127]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 493F7C06174F; Tue, 8 Feb 2022 10:41:38 -0800 (PST) From: =?utf-8?q?Martin_Povi=C5=A1er?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cutebit.org; s=mail; t=1644345292; bh=NP1f3DAdp/xVOoC98TgjO/QBsLcOum1NWt02zNNuht8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=D02vLUnaEP1xPiUSMEO1n6vQ0Ukf07veGt7kCI5nDbdBqEY7jTvJxnCAoKZwtvhCW KzHJA/SoAIQQyIBxqkqkQkQ6WXcH9rae+6sjZaR83ZRFhHO5u748wboQ5AFQiVhwyv YNRjgJlmyKr3n3AZ8luDqNAp64DJQgkcrAC8SLRU= To: Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski Cc: Hector Martin , Sven Peter , Alyssa Rosenzweig , linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Mark Kettenis , =?utf-8?q?Martin_Povi=C5=A1er?= , Rob Herring Subject: [PATCH v4 1/3] dt-bindings: clock: Add Apple NCO Date: Tue, 8 Feb 2022 19:34:09 +0100 Message-Id: <20220208183411.61090-2-povik+lin@cutebit.org> In-Reply-To: <20220208183411.61090-1-povik+lin@cutebit.org> References: <20220208183411.61090-1-povik+lin@cutebit.org> MIME-Version: 1.0 X-Spam: Yes Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The NCO block found on Apple SoCs is a programmable clock generator performing fractional division of a high frequency input clock. Reviewed-by: Mark Kettenis Reviewed-by: Rob Herring Signed-off-by: Martin Povišer --- .../devicetree/bindings/clock/apple,nco.yaml | 62 +++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/apple,nco.yaml diff --git a/Documentation/devicetree/bindings/clock/apple,nco.yaml b/Documentation/devicetree/bindings/clock/apple,nco.yaml new file mode 100644 index 000000000000..23ee3964fbde --- /dev/null +++ b/Documentation/devicetree/bindings/clock/apple,nco.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/apple,nco.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple SoCs' NCO block + +maintainers: + - Martin Povišer + +description: | + The NCO (Numerically Controlled Oscillator) block found on Apple SoCs + such as the t8103 (M1) is a programmable clock generator performing + fractional division of a high frequency input clock. + + It carries a number of independent channels and is typically used for + generation of audio bitclocks. + +properties: + compatible: + items: + - enum: + - apple,t6000-nco + - apple,t8103-nco + - const: apple,nco + + clocks: + description: + Specifies the reference clock from which the output clocks + are derived through fractional division. + maxItems: 1 + + '#clock-cells': + const: 1 + + reg: + maxItems: 1 + +required: + - compatible + - clocks + - '#clock-cells' + - reg + +additionalProperties: false + +examples: + - | + nco_clkref: clock-ref { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <900000000>; + clock-output-names = "nco-ref"; + }; + + nco: clock-controller@23b044000 { + compatible = "apple,t8103-nco", "apple,nco"; + reg = <0x3b044000 0x14000>; + #clock-cells = <1>; + clocks = <&nco_clkref>; + };