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 9C184CFB43F for ; Sun, 6 Oct 2024 13:16:34 +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: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=CDKiEV31bsiIwBeloMkmp7fXMMfYik3WUrJ4N/GLIsg=; b=mZELW3BYV39uxiNCRMfk8uGgT8 9ALe5hCKW3urqy2EUT1OD5gNs/17ti4xrguK/BbnSjigMe9ayiG1qe8wCnirxbiFagSU/DqWye5zO drgDnvUimeQZps/+lZmMgMU3eZIlVlkYc2Lrkfj/eOignXa8Hm3yulMmynyjHZLx6yQ7H0i+DPfE3 WPUR+lGHvr+wpCzcbTYbc2MvYAGbD3aP8p6pM6KVeaM1WCu41EdHbPvNroD7JJ8OwChB3sT1rstEx cbZTNGRkx6Fwp/niN7i/aB4bUZJROUdLNxAlploS1EB2766FiBmkk65Zo6o7F0Z+AzmgZtI8cSN5C IOcKshNA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1sxR7Z-000000004f6-2356; Sun, 06 Oct 2024 13:16:25 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1sxR57-000000004RI-0oPj for linux-arm-kernel@lists.infradead.org; Sun, 06 Oct 2024 13:13:54 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 44E4D5C5436; Sun, 6 Oct 2024 13:13:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 61FAAC4CEC5; Sun, 6 Oct 2024 13:13:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728220432; bh=khsVM2k1ZTcKI00Tfb38pPI+E8XA6tqg9PgEMpsgDOw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=U6J41iP4cBmcBH/lySmBjh7RYoj0h1+7+JyNjKXcNXuwwpOsBnaFUsYhStBWx5m2k 6bLJOGK4fgJEMJet/1JWtSm1cgkNTluuH+idKN8VZxgtudSsODDFZ2Sbib97nGkZP5 9MBRANZk53w8RrMXMnCKsInEkh5eYecC/tMhJtys9mboc4raJZyVFyEv9w73b+qMhX aT6tgmIC0kRpM7YSUblAoqn5xF7LArt2fJ7qYaA/lk6JzTSICwuGnurZBfnr2LDglc Ny5VRcrg2tBNTrey/H1pGi9jcTI/67zaleczFqspjBzIriklyIpgptNqzTbXwBGuIx v9+2UVsqsfT6A== Message-ID: Date: Sun, 6 Oct 2024 15:13:43 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/6] dt-bindings: clock: imx8m-anatop: support spread spectrum clocking To: Dario Binacchi Cc: linux-kernel@vger.kernel.org, linux-amarula@amarulasolutions.com, Conor Dooley , Fabio Estevam , Krzysztof Kozlowski , Michael Turquette , Peng Fan , Pengutronix Kernel Team , Rob Herring , Sascha Hauer , Shawn Guo , Stephen Boyd , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org References: <20240928083804.1073942-1-dario.binacchi@amarulasolutions.com> <20240928083804.1073942-2-dario.binacchi@amarulasolutions.com> <566859c1-a397-4465-987e-0682b07a703e@kernel.org> <6c3e6071-822f-4230-b76b-276330de07ef@kernel.org> <82db5037-bbd3-4005-bde9-02df1bf4c475@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241006_061353_342730_EA0F5CF2 X-CRM114-Status: GOOD ( 15.43 ) 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 On 05/10/2024 10:57, Dario Binacchi wrote: > On Thu, Oct 3, 2024 at 12:46 PM Krzysztof Kozlowski wrote: >> >> On 01/10/2024 08:29, Dario Binacchi wrote: >>> On Mon, Sep 30, 2024 at 8:45 AM Krzysztof Kozlowski wrote: >>>> >>>> On 29/09/2024 22:00, Dario Binacchi wrote: >>>>>> >>>>>> >>>>>>> + properties: >>>>>>> + compatible: >>>>>>> + contains: >>>>>>> + enum: >>>>>>> + - fsl,imx8mm-anatop >>>>>>> + >>>>>>> +then: >>>>>>> + properties: >>>>>>> + fsl,ssc-clocks: >>>>>> >>>>>> Nope. Properties must be defined in top-level. >>>>>> >>>>>>> + $ref: /schemas/types.yaml#/definitions/phandle-array >>>>>>> + description: >>>>>>> + The phandles to the PLLs with spread spectrum clock generation >>>>>>> + hardware capability. >>>>>> >>>>>> These should be clocks. >>>>> >>>>> Sorry, but I can't understand what you're asking me. >>>>> Could you kindly explain it to me in more detail? >>>> >>>> You added new property instead of using existing one for this purpose: >>>> 'clocks'. >>> >>>> >>>> >>>> >>>> Best regards, >>>> Krzysztof >>>> >>> >>> I added this new property specifically for managing spread-spectrum. >>> Indeed, not all clocks/PLLs >>> managed by the node/peripheral support spread-spectrum, and the added >>> properties specify >>> parameters for enabling and tuning SSC for each individual PLL based >>> on the index of each list. >>> If I were to use the 'clocks' property and add a clock to this list >>> that does not support SSC, IMHO >>> the pairings would be less clear. >> >> You duplicate property with argument "pairings shall match". Well, I am >> not happy with the duplication. Clocks have specific order, thus it is >> explicit which one needs tuning. Your other properties can match them as >> well, just index from clocks is offset... > > Just to check if I understood correctly what you are suggesting before > submitting version 3 of the patch. > Something, for example, like: > > clocks = <&clk, IMX8MP_AUDIO_PLL1>, <&clk, IMX8MP_AUDIO_PLL2>, <&clk > IMX8MP_VIDEO_PLL1>; > fsl,ssc-modfreq-hz = <0, 3517>, <2, 6818>; Hm, what is 0? If clock index, then no, it's redundant. The first item in cannot point to other clock. Also, what exactly are you setting here and why assigned-clock-rates are not working? Best regards, Krzysztof