From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f44.google.com (mail-wm1-f44.google.com [209.85.128.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DB96D3FC2 for ; Wed, 25 Aug 2021 15:03:33 +0000 (UTC) Received: by mail-wm1-f44.google.com with SMTP id g135so5905465wme.5 for ; Wed, 25 Aug 2021 08:03:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ux7Lx8zf6ajxZKAoqzyCK78arXZQbpaBRVWqe+SfbQs=; b=EdHWAIS4/fhniuXlCJllaGm9aTliPC+TZkhYe02dR8MzvdvgkNlCgkfh571TYFzJqG JVhpzTy1xBNFWRHheHZNvYN8LEdTnqsUlYZN8bh6O2z8jVPnHC9oD22vR6bHjBHQDnkQ Trzjj9bWlBf5zrRtL3JJnlvCdFErJALpHXMnurlGK3cdHRG7Ovq/vMKBCzVjH55Vz3IF zE5wMKJyDg/ZLsBMYkdK6ADUVojplJZhdTKEN5zeqoiBO6YUu6BcaZ/gsv/2meSfPYoI qebX9ovuXjv7rqYkXezDCoYHLkhoCWnohCu92sZRPue7p31OvGqAYOtMtcVQCa3BQMAl L6XA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ux7Lx8zf6ajxZKAoqzyCK78arXZQbpaBRVWqe+SfbQs=; b=SbzJTNH+nirSJ9ryPcFJk06Xyy0Pojc0DL2f1dnvvM4wbOZH33JB1Ea9phIj8X9zMj E2Mv4+E1P03rOBkIrfdd25iT8ofDLHCA7gjhmfTOaB80nin/cxUqfLa5RuCAT+vxFJRC Yqu0h6e0usUOg6lBCFAOWJfLX56pcEyekDmkY1SOdjXL6gRSX4J98hQpX1JceBOLMA14 C7uRvh9FnmuoPT16x6ZsansXkHy2R9rukV/VfUWFd20dNunWhptfWPktYccHpt+R7JqN 6qBxiDwkixbfxllI5AYry8TNnnbxSXQlaM5VmSQKmc5Hh36YwRxcXtgAMkmmoDNoDZZG wmXw== X-Gm-Message-State: AOAM532nseI8ESwtLqJuVw1s8gf3kiOhLsCZzxmV3xfbaWHe8YHCZdqM 5k91JiAgNIAtG7cMfdG72Fo= X-Google-Smtp-Source: ABdhPJyH76gAEIdov99EVjI78hQXaDX6mFzZyCgjynTCqvVpMKFZAkxb6ffzZlsyNRsemTO8aNAOsw== X-Received: by 2002:a05:600c:4f96:: with SMTP id n22mr9338543wmq.17.1629903812305; Wed, 25 Aug 2021 08:03:32 -0700 (PDT) Received: from jernej-laptop.localnet (cpe-86-58-29-253.static.triera.net. [86.58.29.253]) by smtp.gmail.com with ESMTPSA id l15sm120580wrv.84.2021.08.25.08.03.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Aug 2021 08:03:31 -0700 (PDT) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: Maxime Ripard Cc: Icenowy Zheng , Rob Herring , Chen-Yu Tsai , Ulf Hansson , Linus Walleij , Alexandre Belloni , Andre Przywara , Samuel Holland , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH 10/17] clk: sunxi=ng: add support for R329 R-CCU Date: Wed, 25 Aug 2021 17:03:30 +0200 Message-ID: <3221818.pD4rYpbbZ1@jernej-laptop> In-Reply-To: <20210825145027.ixc7wnh3x5w6wzny@gilmour> References: <20210802062212.73220-1-icenowy@sipeed.com> <5432230.1UTMcGJKg4@jernej-laptop> <20210825145027.ixc7wnh3x5w6wzny@gilmour> Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Dne sreda, 25. avgust 2021 ob 16:50:27 CEST je Maxime Ripard napisal(a): > Hi, >=20 > On Fri, Aug 20, 2021 at 06:34:38AM +0200, Jernej =C5=A0krabec wrote: > > > > +static void __init sun50i_r329_r_ccu_setup(struct device_node *nod= e) > > > > +{ > > > > + void __iomem *reg; > > > > + u32 val; > > > > + int i; > > > > + > > > > + reg =3D of_io_request_and_map(node, 0, of_node_full_name(node)); > > > > + if (IS_ERR(reg)) { > > > > + pr_err("%pOF: Could not map clock registers\n", node); > > > > + return; > > > > + } > > > > + > > > > + /* Enable the lock bits and the output enable bits on all PLLs */ > > > > + for (i =3D 0; i < ARRAY_SIZE(pll_regs); i++) { > > > > + val =3D readl(reg + pll_regs[i]); > > > > + val |=3D BIT(29) | BIT(27); > > > > + writel(val, reg + pll_regs[i]); > > > > + } > > > > + > > > > + /* > > > > + * Force the I/O dividers of PLL-AUDIO1 to reset default value > > > > + * > > > > + * See the comment before pll-audio1 definition for the reason. > > > > + */ > > > > + > > > > + val =3D readl(reg + SUN50I_R329_PLL_AUDIO1_REG); > > > > + val &=3D ~BIT(1); > > > > + val |=3D BIT(0); > > > > + writel(val, reg + SUN50I_R329_PLL_AUDIO1_REG); > > > > + > > > > + i =3D sunxi_ccu_probe(node, reg, &sun50i_r329_r_ccu_desc); > > > > + if (i) > > > > + pr_err("%pOF: probing clocks fails: %d\n", node, i); > > > > +} > > > > + > > > > +CLK_OF_DECLARE(sun50i_r329_r_ccu, "allwinner,sun50i-r329-r-ccu", > > > > + sun50i_r329_r_ccu_setup); > > >=20 > > > Please make this a platform driver. There is no particular reason why= it > > > needs to be an early OF clock provider. > >=20 > > Why? It's good to have it as early clock provider. It has no dependenci= es > > and other drivers that depends on it, like IR, can be deferred, if this > > is loaded later. >=20 > No, Samuel is right, we should make them regular drivers as much as we > can. >=20 > The reason we had CLK_OF_DECLARE in the first place is that timers > usually have a parent clock, and you need the timers before the device > model is set up. >=20 > Fortunately for us, since the A20, the architected timers don't require > a parent clock from us, and we can thus boot up fine. There are other timers. A lot of SoCs, newer than A20 (like H6), have High= =20 Speed Timer, which requires parent clock to be enabled. We just choose not = to=20 add node for it to DT, even if it's there and driver already exists. Best regards, Jernej >=20 > Since the dependencies are minimal, it should probe fairly early and > with the on-demand probing from the device links you might not even tell > the difference for most consumers. >=20 > Maxime 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 X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DA25DC4338F for ; Wed, 25 Aug 2021 15:11:13 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id ABB416103E for ; Wed, 25 Aug 2021 15:11:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org ABB416103E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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=0Rkhl3KCXxKmGQzSyWMV7lR0RADRh6t4GcNwGxAxRRo=; b=Ua3uF9MuWvxp5P l6ys4o1IkSKlSvZ+LBeB5c2UYQWqd3x7LJ10xfNnDBYCdTAh7Xy9MkijbQIIDbq7oUQVMva7NxCmK 7KnI+PViq2f73G4Kaxok578rSKmWrSyTDAz/KYJL8097MMq0/bcUcIdJDJNF5ZlRJH4XZG61QbKoc VP/ZbBHcBV5l6dHD+pYUb/tjyVHl+fT+DRxwevbR8Jkxze5hepg3JQQL88VaxyTzlabkzrKCaJytH jTOGSrelbIMhjmT+Lrp7nOUFTRJH1HdfMfkjWBv9gCZagnzNckzRS9vdfwlhi5PUva4PbchdKbf4B 1Pl9+dvvPzVy7YA/55Dw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mIuVd-007RXC-PW; Wed, 25 Aug 2021 15:08:10 +0000 Received: from mail-wm1-x32d.google.com ([2a00:1450:4864:20::32d]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mIuRD-007PlJ-3b for linux-arm-kernel@lists.infradead.org; Wed, 25 Aug 2021 15:03:36 +0000 Received: by mail-wm1-x32d.google.com with SMTP id 79-20020a1c0452000000b002e6cf79e572so4548141wme.1 for ; Wed, 25 Aug 2021 08:03:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ux7Lx8zf6ajxZKAoqzyCK78arXZQbpaBRVWqe+SfbQs=; b=EdHWAIS4/fhniuXlCJllaGm9aTliPC+TZkhYe02dR8MzvdvgkNlCgkfh571TYFzJqG JVhpzTy1xBNFWRHheHZNvYN8LEdTnqsUlYZN8bh6O2z8jVPnHC9oD22vR6bHjBHQDnkQ Trzjj9bWlBf5zrRtL3JJnlvCdFErJALpHXMnurlGK3cdHRG7Ovq/vMKBCzVjH55Vz3IF zE5wMKJyDg/ZLsBMYkdK6ADUVojplJZhdTKEN5zeqoiBO6YUu6BcaZ/gsv/2meSfPYoI qebX9ovuXjv7rqYkXezDCoYHLkhoCWnohCu92sZRPue7p31OvGqAYOtMtcVQCa3BQMAl L6XA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ux7Lx8zf6ajxZKAoqzyCK78arXZQbpaBRVWqe+SfbQs=; b=rHHSs43RIYTXBjjUXXn56/+IbRbr3htJ5ZiV8VJp4ztyK7UxvXrTW1s112HqXcJXYk vyD4gXyEXRkkBP11uvR5yuxpeCRRDwmVTTWInP2n8L0bWMd+dAS4ngQVc0J9bXEERoHS 29Tp9UWTBWkD7WOAdqOjOrCd8Dd2lT7wvsrPANnt7Jk/+oq+zhRS8orkknUf58qApbZf S3tz68gjSC2wvFs12b2phCK7YQ+9kws/IYQIKIW6Lz50vIdfwUyP2+tmrg3eP0s5yASY RrdLmUc5nJndlD6zIbz2uXi3TyGXvM66qMwdatR376AE8OZLwR4iHQhTcpEPe04QJ38w 9gWA== X-Gm-Message-State: AOAM531zljqtMPSXRGScFep2QsXK7/2tJ7dtlnO4StT+prodgLUdwynV SFUFOMc8r1LqG5s3FHTiShA= X-Google-Smtp-Source: ABdhPJyH76gAEIdov99EVjI78hQXaDX6mFzZyCgjynTCqvVpMKFZAkxb6ffzZlsyNRsemTO8aNAOsw== X-Received: by 2002:a05:600c:4f96:: with SMTP id n22mr9338543wmq.17.1629903812305; Wed, 25 Aug 2021 08:03:32 -0700 (PDT) Received: from jernej-laptop.localnet (cpe-86-58-29-253.static.triera.net. [86.58.29.253]) by smtp.gmail.com with ESMTPSA id l15sm120580wrv.84.2021.08.25.08.03.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Aug 2021 08:03:31 -0700 (PDT) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: Maxime Ripard Cc: Icenowy Zheng , Rob Herring , Chen-Yu Tsai , Ulf Hansson , Linus Walleij , Alexandre Belloni , Andre Przywara , Samuel Holland , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH 10/17] clk: sunxi=ng: add support for R329 R-CCU Date: Wed, 25 Aug 2021 17:03:30 +0200 Message-ID: <3221818.pD4rYpbbZ1@jernej-laptop> In-Reply-To: <20210825145027.ixc7wnh3x5w6wzny@gilmour> References: <20210802062212.73220-1-icenowy@sipeed.com> <5432230.1UTMcGJKg4@jernej-laptop> <20210825145027.ixc7wnh3x5w6wzny@gilmour> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210825_080335_269666_2A248D48 X-CRM114-Status: GOOD ( 31.98 ) 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: , Content-Type: text/plain; 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