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=-14.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 6F7A5C4338F for ; Thu, 19 Aug 2021 17:03:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5BB6760FE6 for ; Thu, 19 Aug 2021 17:03:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232708AbhHSREb (ORCPT ); Thu, 19 Aug 2021 13:04:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230312AbhHSRE2 (ORCPT ); Thu, 19 Aug 2021 13:04:28 -0400 Received: from mail-wm1-x330.google.com (mail-wm1-x330.google.com [IPv6:2a00:1450:4864:20::330]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0DB65C061575; Thu, 19 Aug 2021 10:03:52 -0700 (PDT) Received: by mail-wm1-x330.google.com with SMTP id o15so4236381wmr.3; Thu, 19 Aug 2021 10:03:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=oJSyVi1Ti8Nnw90fU6cpGrkDUh7d4poA+u+RmE9yClc=; b=WjO9vG1rxjOXSea0lggzneOK1T6brU84ws+V+SOshWtWLDtP8dw4z3PqYpbiYfKli1 rXcVeuPjT7MJg7Hy5j8m3cd8kdbRkCEcM1Y80y8aKWqMDBpsEeU4BdtyUa/ON6dEIpuI ZH83YfvUPLz7N8Eucoioijep/MF/3w0IGFv19+kQ9bZgPKOHNPjpkkiiG7frHJKiLmhR PSWLWci5igVYTxBtqkvlj5fV5Gwf9+1XGIFKjnJNTLfzWugJ7siIAcnkXrphSw12V8Us vFqkDjmlPCNix0bh4GlaOKtAD+MVeEwQ6e6JDKcS6m84MivgDrAwN5keeZsMvCUxJPh5 owbA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=oJSyVi1Ti8Nnw90fU6cpGrkDUh7d4poA+u+RmE9yClc=; b=BKL2Kh85MqMVjQCipT10Y8VzeWNi78UB2drISzPw9s+FSouxUA2kPrxo6R5NTnOqTi 4UQqoWRUqpVP7APKwz3fFvh0yEpNC8eOgocw0KrmTRDmJrdRxnNm5wqEpFtQTjqWqYao CQFDRmXKnIEaJuTPmV3/1B1Lv3ne5KDKUd0SdE0BN6L2FlFw1TjStYBsTfA+UN/ri6XE mfgCtQA0aAbDusJyY3rw4quMlXaBhKtj9/FK68OEah0gW9rIcmwslMPDrEsGZ4PeNGBr g42gu99ur0LpDa/Rzpy3oE8ac0cbgkHERwglwdZotl2ZKeYWAqgRSyyMv+0p2TGxzk8e 99mQ== X-Gm-Message-State: AOAM531rlR15nlkjMAuGGIxGX3f1VzLppjg0Kx83lFKgVUH7t3GRI5cg C8KhcY4JCMHJjSV5R2gSmQI= X-Google-Smtp-Source: ABdhPJzLX7hjX9RRU2YIQz+WOkf7C4KD77ZHazVOwLC50X1dVFEX0qYgndjCiaQPFM42jC66tRB3Yw== X-Received: by 2002:a05:600c:3641:: with SMTP id y1mr14362707wmq.43.1629392630595; Thu, 19 Aug 2021 10:03:50 -0700 (PDT) Received: from localhost ([217.111.27.204]) by smtp.gmail.com with ESMTPSA id e3sm3493730wrv.65.2021.08.19.10.03.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Aug 2021 10:03:49 -0700 (PDT) Date: Thu, 19 Aug 2021 19:03:48 +0200 From: Thierry Reding To: Dmitry Osipenko Cc: Jonathan Hunter , Ulf Hansson , Viresh Kumar , Stephen Boyd , Peter De Schrijver , Mikko Perttunen , Peter Chen , Mark Brown , Lee Jones , Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= , Nishanth Menon , Vignesh Raghavendra , Richard Weinberger , Miquel Raynal , Lucas Stach , Stefan Agner , Adrian Hunter , Mauro Carvalho Chehab , Rob Herring , Michael Turquette , linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, linux-staging@lists.linux.dev, linux-spi@vger.kernel.org, linux-pwm@vger.kernel.org, linux-mtd@lists.infradead.org, linux-mmc@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org Subject: Re: [PATCH v8 20/34] mmc: sdhci-tegra: Add runtime PM and OPP support Message-ID: References: <20210817012754.8710-1-digetx@gmail.com> <20210817012754.8710-21-digetx@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="Zkl/ZGRNLhkdNGO0" Content-Disposition: inline In-Reply-To: <20210817012754.8710-21-digetx@gmail.com> User-Agent: Mutt/2.1.1 (e2a89abc) (2021-07-12) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org --Zkl/ZGRNLhkdNGO0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Aug 17, 2021 at 04:27:40AM +0300, Dmitry Osipenko wrote: > The SDHCI on Tegra belongs to the core power domain and we're going to > enable GENPD support for the core domain. Now SDHCI must be resumed using > runtime PM API in order to initialize the SDHCI power state. The SDHCI > clock rate must be changed using OPP API that will reconfigure the power > domain performance state in accordance to the rate. Add runtime PM and OPP > support to the SDHCI driver. >=20 > Signed-off-by: Dmitry Osipenko > --- > drivers/mmc/host/sdhci-tegra.c | 146 ++++++++++++++++++++++++--------- > 1 file changed, 105 insertions(+), 41 deletions(-) >=20 > diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegr= a.c > index 387ce9cdbd7c..a3583359c972 100644 > --- a/drivers/mmc/host/sdhci-tegra.c > +++ b/drivers/mmc/host/sdhci-tegra.c > @@ -15,6 +15,8 @@ > #include > #include > #include > +#include > +#include > #include > #include > #include > @@ -24,6 +26,8 @@ > #include > #include > =20 > +#include > + > #include "sdhci-pltfm.h" > #include "cqhci.h" > =20 > @@ -123,6 +127,12 @@ > SDHCI_TRNS_BLK_CNT_EN | \ > SDHCI_TRNS_DMA) > =20 > +enum { > + TEGRA_CLK_BULK_SDHCI, > + TEGRA_CLK_BULK_TMCLK, > + TEGRA_CLK_BULK_NUM, > +}; > + > struct sdhci_tegra_soc_data { > const struct sdhci_pltfm_data *pdata; > u64 dma_mask; > @@ -171,6 +181,8 @@ struct sdhci_tegra { > bool enable_hwcq; > unsigned long curr_clk_rate; > u8 tuned_tap_delay; > + > + struct clk_bulk_data clocks[TEGRA_CLK_BULK_NUM]; This doesn't seem worth it to me. There's a lot of churn in this driver that's only needed to convert this to the clk_bulk API and it makes the code a lot more difficult to read, in my opinion. It looks like the only benefit that this gives us is that runtime suspend and resume become a few lines shorter. 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