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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41FF4C74A5B for ; Tue, 21 Mar 2023 06:38:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230313AbjCUGiN (ORCPT ); Tue, 21 Mar 2023 02:38:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229928AbjCUGiM (ORCPT ); Tue, 21 Mar 2023 02:38:12 -0400 Received: from mail-ed1-x52e.google.com (mail-ed1-x52e.google.com [IPv6:2a00:1450:4864:20::52e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0429B3B66F for ; Mon, 20 Mar 2023 23:37:38 -0700 (PDT) Received: by mail-ed1-x52e.google.com with SMTP id ek18so55653354edb.6 for ; Mon, 20 Mar 2023 23:37:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1679380654; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=Cx+KGeUp/wxOIZjrDPkHjblyuhe5J5nJa9fCaHcyiZw=; b=BCi0uaCvv0+js1ecGX2/NRV5aUU6/IiNSTvSB4IiiLLJGg7DhzHLMBfwqoTXl+d5qB O3m7iLjMOxi3eTn9Nx7+fU7M5PXE48TLcl5bn/feaRAEKYqYaWMwa8oU2FysPGejYS6j SFtaEIyCHf/ct/pw3lXJP57bH9Fqh4RSD5XDFD6Q11dAjj+Xz1pbMFfvA2VbREGenwRE 4SVfJTB7+jnQ9wjYMnAbpfeSS3cNj81DlR2IQwR3Vjj5TKWkQdQek967Kr6kFtlWXiXz sVSOe9Ywpg93cmPXy3vfpPosmOWjhuel+sR7beCS86CtU5VzQ9QuZyP1xAxruciHIL0r hrUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679380654; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Cx+KGeUp/wxOIZjrDPkHjblyuhe5J5nJa9fCaHcyiZw=; b=cZ41t9li96XsEUlO1VyNJzwFgd7BeN8Btj0BdHGXxW6ZP8SR3Kq/8iChk5JAi0eXm5 DWH5nhpl0ALGRLuViQmT2gStk6QkvcbdQpyjxLgfcfiIztlNMB+0zE7OJ+KKDYLTs1+h X+8TUS3BXkfZ5QLTLQ1dHhH1rdunlaOtWNXJY/ahHPLMiwGUOdhmM21+dwnnYXGXRTYQ Ac+PxNnii39FTp2OOYzplj2xpzCFzvpXx2NjN545AAFxwvp0X2yaUD8N4OIzsK0kEoux Ili3jmWjm2P4LXNEYyFP8WYRGhuChQ3Ehd4WzTlwPgB65qeWfaXzPZM0b5f75PgJv4EW xYHg== X-Gm-Message-State: AO0yUKWHaicir8SvVyrIp1/v2ckWwTIq14I/zkLnqyZnUETEfwZb5FKA Pojynuphu+ybs27BXMg0GIfMtw== X-Google-Smtp-Source: AK7set/T00OguACk3viJY9WGs6qdtUM6xsHRWD3xyJzjHRX/K4nsguPr/BBF2Vtic1IdmXJWJVDqUQ== X-Received: by 2002:a17:906:39da:b0:92c:a80e:225f with SMTP id i26-20020a17090639da00b0092ca80e225fmr1794550eje.52.1679380654368; Mon, 20 Mar 2023 23:37:34 -0700 (PDT) Received: from ?IPV6:2a02:810d:15c0:828:2142:d8da:5ae4:d817? ([2a02:810d:15c0:828:2142:d8da:5ae4:d817]) by smtp.gmail.com with ESMTPSA id la18-20020a170907781200b00914001c91fcsm5332603ejc.86.2023.03.20.23.37.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Mar 2023 23:37:33 -0700 (PDT) Message-ID: <48bdca7a-e4ec-a2e4-ff0d-dc9a08bf799e@linaro.org> Date: Tue, 21 Mar 2023 07:37:33 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Subject: Re: [EXT] Re: [PATCH v2 1/3] dt-bindings: usb: cdns-imx8qm: add imx8qm cdns3 glue bindings Content-Language: en-US To: Frank Li , "shawnguo@kernel.org" Cc: "devicetree@vger.kernel.org" , "festevam@gmail.com" , "imx@lists.linux.dev" , "kernel@pengutronix.de" , "krzysztof.kozlowski+dt@linaro.org" , "linux-arm-kernel@lists.infradead.org" , dl-linux-imx , "linux-kernel@vger.kernel.org" , "robh+dt@kernel.org" , "s.hauer@pengutronix.de" References: <20230316212712.2426542-1-Frank.Li@nxp.com> <20230316212712.2426542-2-Frank.Li@nxp.com> <1fd1fe42-3da6-1598-a04d-cb99a9b4b145@linaro.org> <614fa099-e666-03da-1b11-29cc804bf847@linaro.org> From: Krzysztof Kozlowski In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 20/03/2023 20:59, Frank Li wrote: >> >> The second is a good example - as you can see, there is a choice of >> values, so they are not exactly fixed. >> >>> >>> Such frequency information is necessary. We can put to dts or clock drivers. >> The clock driver >> >> If this is the argument, then the answer is NAK. Sorry, but DTS is not >> for offloading fixed stuff just because you do not want to work on >> drivers. The same for discoverable stuff. >> >>> Become bigger, or dts become bigger. I think the key point is if property to >> descript hardware information. >> >> You have to understand that with your binding you are not allowing to >> any changes of these frequencies. > > Do you means it should be okay if one of clocks is not fixed? We have here long discussion why does your binding require fixed frequencies, because this is something unusual and not recommended. And if they are really fixed, then device driver probably should make the choice of frequencies. > > Previous owner already left nxp. I double checked our documents and scfw source code. > I miss understood a clock SC_PM_CLK_MST_BUS, which actually mapped to IP's aclk, which > ware 100Mhz to 600Mhz. > >> >> Best regards, >> Krzysztof > Best regards, Krzysztof