From patchwork Sun Aug 11 21:00:31 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 1145411 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="iqS0R2SD"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 466BJM1BvQz9s00 for ; Mon, 12 Aug 2019 07:02:43 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726538AbfHKVCc (ORCPT ); Sun, 11 Aug 2019 17:02:32 -0400 Received: from mail-lf1-f68.google.com ([209.85.167.68]:41937 "EHLO mail-lf1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726014AbfHKVBc (ORCPT ); Sun, 11 Aug 2019 17:01:32 -0400 Received: by mail-lf1-f68.google.com with SMTP id 62so68069767lfa.8; Sun, 11 Aug 2019 14:01:30 -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=PCQNSQK+2muyk726fUJhk7VrSnWFFmbUV5XprGSciK8=; b=iqS0R2SDrlicqLgn5suktXs9AFtzniJ/Vaer5C9DqjIXiQajwBUDDI+V3GXngWZzWX JQBzVibEVd/zV4jcDkwlKJYDenpYH0rdR0Q6vmrmrNiuOb/ULXZLkmOaHJLLzjA24NCD SKGimlm+vGo5HN8gIRg/BghUl24f6r4Zeno/aDd2z/INWNi1ehxZP9LyCyT54UqOadhi fKY+17qfDoJKGzwtDyH0Noq2IEmAecgV+4ChlDSeDP+R1nkG/OvHAndY6il2NpL9HVTF O7nmSu01A13VI9yaTGn7R0ak/p2V1+eRM+ViTZIBGFZ+chZLxl9BS++xOkCvLtHYCtl9 3t5Q== 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=PCQNSQK+2muyk726fUJhk7VrSnWFFmbUV5XprGSciK8=; b=joSu8Lm4DOqiXL+3MCm1zEvIm6UudWa2HQ40QgL0Xv2gOegSG+3ZDNLJ/tlhyJVTz7 BneZqpRNiaUyuLeIfAgL2Nvu1NyrmTslk+CsbZrr5fC1qLw0X8Ja35dmvZ/KXnFpNnuz Hl5naCanefXrbNPYfZCNuRAwqVdA1jGVJlocQtpWkotCqHjP5nUqlFNMvwGPNGYt1MM4 UnUCOVP95OE4Kw8KMqkZJldI74+tZ7EwklC4fR3ElWQD8D1luk5dWC0ePUgCvC5tpTf9 5OocY1HLpKYZurAL1C1C4aqDxbJE+EjzA4EjbUEAWdKngm6NfoGMZWobolv8vXzqGzFA HEKQ== X-Gm-Message-State: APjAAAVQcUrPx9scNzVEVI11EKGAIDpoge/H1LNEvgmLwqk1HChgOl4c s8hw9ovsQ7fX0nBF/35fJ4Q= X-Google-Smtp-Source: APXvYqya9rPNIlGa09sLjQh0b8kmUVAffaz2MXC2ZpD6xEBdX5nLv/4ylB2afz92efaRHl1skzYcUA== X-Received: by 2002:a05:6512:15a:: with SMTP id m26mr18011935lfo.71.1565557289724; Sun, 11 Aug 2019 14:01:29 -0700 (PDT) Received: from localhost.localdomain ([94.29.34.218]) by smtp.gmail.com with ESMTPSA id z25sm18708161lfi.51.2019.08.11.14.01.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 11 Aug 2019 14:01:29 -0700 (PDT) From: Dmitry Osipenko To: Rob Herring , Michael Turquette , Joseph Lo , Thierry Reding , Jonathan Hunter , Peter De Schrijver , Prashant Gaikwad , Stephen Boyd Cc: devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v10 03/15] memory: tegra20-emc: Adapt for clock driver changes Date: Mon, 12 Aug 2019 00:00:31 +0300 Message-Id: <20190811210043.20122-4-digetx@gmail.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190811210043.20122-1-digetx@gmail.com> References: <20190811210043.20122-1-digetx@gmail.com> MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Now Terga20 and Tegra30 EMC drivers should provide clock-rounding functionality using the new Tegra-CLK driver API. Acked-by: Peter De Schrijver Signed-off-by: Dmitry Osipenko --- drivers/memory/tegra/tegra20-emc.c | 50 ++++++++++++++++++++++++++++-- 1 file changed, 48 insertions(+), 2 deletions(-) diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index da8fa592b071..b519f02b0ee9 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -421,6 +422,44 @@ static int emc_setup_hw(struct tegra_emc *emc) return 0; } +static long emc_round_rate(unsigned long rate, + unsigned long min_rate, + unsigned long max_rate, + void *arg) +{ + struct emc_timing *timing = NULL; + struct tegra_emc *emc = arg; + unsigned int i; + + min_rate = min(min_rate, emc->timings[emc->num_timings - 1].rate); + + for (i = 0; i < emc->num_timings; i++) { + if (emc->timings[i].rate < rate && i != emc->num_timings - 1) + continue; + + if (emc->timings[i].rate > max_rate) { + i = max(i, 1u) - 1; + + if (emc->timings[i].rate < min_rate) + break; + } + + if (emc->timings[i].rate < min_rate) + continue; + + timing = &emc->timings[i]; + break; + } + + if (!timing) { + dev_err(emc->dev, "no timing for rate %lu min %lu max %lu\n", + rate, min_rate, max_rate); + return -EINVAL; + } + + return timing->rate; +} + static int tegra_emc_probe(struct platform_device *pdev) { struct device_node *np; @@ -477,21 +516,28 @@ static int tegra_emc_probe(struct platform_device *pdev) return err; } + tegra20_clk_set_emc_round_callback(emc_round_rate, emc); + emc->clk = devm_clk_get(&pdev->dev, "emc"); if (IS_ERR(emc->clk)) { err = PTR_ERR(emc->clk); dev_err(&pdev->dev, "failed to get emc clock: %d\n", err); - return err; + goto unset_cb; } err = clk_notifier_register(emc->clk, &emc->clk_nb); if (err) { dev_err(&pdev->dev, "failed to register clk notifier: %d\n", err); - return err; + goto unset_cb; } return 0; + +unset_cb: + tegra20_clk_set_emc_round_callback(NULL, NULL); + + return err; } static const struct of_device_id tegra_emc_of_match[] = {