From patchwork Fri Aug 14 00:05:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 257026 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=-13.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 A00D7C433E1 for ; Fri, 14 Aug 2020 00:09:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7911F2078B for ; Fri, 14 Aug 2020 00:09:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="eRd1rHgY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726745AbgHNAJb (ORCPT ); Thu, 13 Aug 2020 20:09:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46650 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726793AbgHNAHR (ORCPT ); Thu, 13 Aug 2020 20:07:17 -0400 Received: from mail-lj1-x241.google.com (mail-lj1-x241.google.com [IPv6:2a00:1450:4864:20::241]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C673C061383; Thu, 13 Aug 2020 17:07:15 -0700 (PDT) Received: by mail-lj1-x241.google.com with SMTP id w14so8110042ljj.4; Thu, 13 Aug 2020 17:07:15 -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=FdFHEYH0SedaYmARghSCa7o+JjfWSMYBVfZijnGUEd0=; b=eRd1rHgYkncn22Ou0jtrzjuUMIhGYMHYufHy42pGDs51PAOtFx2BMutWIBqfSQZgeh D7/PQ6Xqbi4FxgeoJmMRNpZCjT8b2Uc+GUkG5ycvfAGH8nKeOCGifPVc+cSILE2DBkFq pwBsZhyi4RjC9JIaFLEoJceorJBvBa6rwT6J/Vn06MsajIMtPrlQeY1332O/NBjs8Zx7 cCQrW7fLJxr6U1pgQqocd06kUMG4un9wqz5hetkah8/G5Frrr2jypCwDGGW0dHIaqSvR tloMI9cMtsC2Ggb+rToMR8iWZ0fyc0Z/grWTZbiGH4awBP6befBtmj+oE8ZDYPmB+e+1 IXtw== 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=FdFHEYH0SedaYmARghSCa7o+JjfWSMYBVfZijnGUEd0=; b=Ld3ynTToGDI1d27QaqcpwELvU98uZsvHQBSK8Sx51dYUfBG3kmRGgLVoV4jcYt1Gwf rZccAAafJdYNTVkuJ5xWQtivN7Aw45wPg0WplMxlp75+gIGnw+7R9bF1UzXvaH9dVMCg IGUo8PyLd6dsrT8HBvVaj03F6gZbqbpglpqry7dDHeztNvoszLT5B3OESuJ0Gp9hs3cd joRblOpbbl6+zxaRJdFzlsmTLDe0xheg3Qe3YJt/o5w+gUpLOzOHaU6wYZSlPDBN65HO hpniSRu2ij8Ib2kVhujlFsRIoIC8lHz+h5RFtZuoH/RpibuJvBpBu7XRyMvrnDZjCsUg rvqQ== X-Gm-Message-State: AOAM533ghQUrimbJMvBnQBBPY0n/TNEy/6buQc3nnnJwzKqKlsfhXAVU LNG58ICTAj5wPBKKCiEONm8= X-Google-Smtp-Source: ABdhPJxL9BUYSKl5lC8jFL/iz/BrlYghtRVCp2vUSd1CIrGiHquNBYFpKfC60ekSidFAFA3FJT+PMw== X-Received: by 2002:a2e:b008:: with SMTP id y8mr81369ljk.421.1597363634483; Thu, 13 Aug 2020 17:07:14 -0700 (PDT) Received: from localhost.localdomain (109-252-170-211.dynamic.spd-mgts.ru. [109.252.170.211]) by smtp.gmail.com with ESMTPSA id c17sm1504450lfr.23.2020.08.13.17.07.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Aug 2020 17:07:13 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Georgi Djakov , Rob Herring , Michael Turquette , Stephen Boyd , Peter De Schrijver , MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Mikko Perttunen Cc: linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org Subject: [PATCH v5 12/36] PM / devfreq: tegra20: Use MC timings for building OPP table Date: Fri, 14 Aug 2020 03:05:57 +0300 Message-Id: <20200814000621.8415-13-digetx@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200814000621.8415-1-digetx@gmail.com> References: <20200814000621.8415-1-digetx@gmail.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The clk_round_rate() won't be usable for building OPP table once interconnect support will be added to the EMC driver because that CLK API function limits the rounded rate based on the clk rate that is imposed by active clk-users, and thus, the rounding won't work as expected if interconnect will set the minimum EMC clock rate before devfreq driver is loaded. The struct tegra_mc contains memory timings which could be used by the devfreq driver for building up OPP table instead of rounding clock rate, this patch implements this idea. Signed-off-by: Dmitry Osipenko --- drivers/devfreq/tegra20-devfreq.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/devfreq/tegra20-devfreq.c b/drivers/devfreq/tegra20-devfreq.c index 6469dc69c5e0..a985f24098f5 100644 --- a/drivers/devfreq/tegra20-devfreq.c +++ b/drivers/devfreq/tegra20-devfreq.c @@ -123,8 +123,7 @@ static int tegra_devfreq_probe(struct platform_device *pdev) { struct tegra_devfreq *tegra; struct tegra_mc *mc; - unsigned long max_rate; - unsigned long rate; + unsigned int i; int err; mc = tegra_get_memory_controller(); @@ -135,6 +134,11 @@ static int tegra_devfreq_probe(struct platform_device *pdev) return err; } + if (!mc->num_timings) { + dev_info(&pdev->dev, "memory controller has no timings\n"); + return -ENODEV; + } + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); if (!tegra) return -ENOMEM; @@ -151,12 +155,8 @@ static int tegra_devfreq_probe(struct platform_device *pdev) tegra->regs = mc->regs; - max_rate = clk_round_rate(tegra->emc_clock, ULONG_MAX); - - for (rate = 0; rate <= max_rate; rate++) { - rate = clk_round_rate(tegra->emc_clock, rate); - - err = dev_pm_opp_add(&pdev->dev, rate, 0); + for (i = 0; i < mc->num_timings; i++) { + err = dev_pm_opp_add(&pdev->dev, mc->timings[i].rate, 0); if (err) { dev_err(&pdev->dev, "failed to add opp: %d\n", err); goto remove_opps;