From patchwork Wed Nov 11 01:14:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 11896059 X-Patchwork-Delegate: cw00.choi@samsung.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DAB5D16C0 for ; Wed, 11 Nov 2020 01:17:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B5F2E221F7 for ; Wed, 11 Nov 2020 01:17:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="TuenlxOl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732755AbgKKBP3 (ORCPT ); Tue, 10 Nov 2020 20:15:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48740 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732704AbgKKBPY (ORCPT ); Tue, 10 Nov 2020 20:15:24 -0500 Received: from mail-wr1-x444.google.com (mail-wr1-x444.google.com [IPv6:2a00:1450:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD08FC0613D4; Tue, 10 Nov 2020 17:15:23 -0800 (PST) Received: by mail-wr1-x444.google.com with SMTP id d12so688816wrr.13; Tue, 10 Nov 2020 17:15:23 -0800 (PST) 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=fyu/TRO5yWpBbQQ0dTrByo3SnRiUtLscyENKkMxzI64=; b=TuenlxOlgQMKeVdC1fXwNuNOwbZY0XCdF44y8OROIBuEb5jOSLndWxohPt4/ZeL26w z3c9uSIcdUaN5Z0QeZKkhMU+MFd4iIwPSWnDhdbNEJ/+PaRJf1OqJWAmN3y9/IpgYNOm sgvJnLOR5ZF+QZFJ0lCRypdanpM5xsBHbItJrlNUCEH9g1J2uBsv1Hn1fzoCL86dcumv a1V3eKEiH4o83PUH4gMwP0lSdmZhgVAqvdBtrbxB4X7vIBzMYeB95BYEbCOtNzr6X2F1 B1TDWGfGhEe6Da6USBAXp6//8nI3KLuTUNTFBCTJt5J2iEzaU2gL6uiSCbloPpMGSfaJ hdQw== 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=fyu/TRO5yWpBbQQ0dTrByo3SnRiUtLscyENKkMxzI64=; b=AllM3kraJxnZyor/mJ2t509CxYyGLx55AMzWmfw5joBp321AknSklgs5AsSBwdkYlS gu58ohChEGM1t5gEPznE/BNmTc6pch4JMLVO/sfA3gkFN1kTctaXGO/KBt0uwjz+mIPx 4E8nFfctPJAfr5RXjaGsJM5TtpEwvNprd/J2/tyx93vZNv3Uavr2NGWrZmdUuwlNYpQ0 IXbIyENxWDPogF7XBTnkaeAbyD8xRfM/dDDvFnXU95FhQH3E8YR4ocBt6fqcMDIZcMXu wALrCn4jewOBop0Kelm10u+8tZh3O+qYH4mzG4SO5YFjygWz9YgqdoywYVVw6nzIpHX2 KiaQ== X-Gm-Message-State: AOAM5332N7GnmQsjnUVPm7Fdga2DhRjMz0CO72p0w58ETtDPcNhIOS7u yVLA8qhvTueeG1v3qW6p+5ahz2VD2Ig= X-Google-Smtp-Source: ABdhPJw4wDgLBVIYiU/vXdLuuIS/i2yBD21T0D7MBVqlG5B36sFE29nf56BchuMNs4ai+gb6a1jG+g== X-Received: by 2002:adf:e74d:: with SMTP id c13mr11217777wrn.277.1605057322702; Tue, 10 Nov 2020 17:15:22 -0800 (PST) Received: from localhost.localdomain (109-252-193-159.dynamic.spd-mgts.ru. [109.252.193.159]) by smtp.gmail.com with ESMTPSA id g131sm564329wma.35.2020.11.10.17.15.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Nov 2020 17:15:22 -0800 (PST) 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 , Viresh Kumar , Peter Geis , Nicolas Chauvet , Krzysztof Kozlowski Cc: linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH v8 08/26] memory: tegra30-emc: Continue probing if timings are missing in device-tree Date: Wed, 11 Nov 2020 04:14:38 +0300 Message-Id: <20201111011456.7875-9-digetx@gmail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201111011456.7875-1-digetx@gmail.com> References: <20201111011456.7875-1-digetx@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org EMC driver will become mandatory after turning it into interconnect provider because interconnect users, like display controller driver, will fail to probe using newer device-trees that have interconnect properties. Thus make EMC driver to probe even if timings are missing in device-tree. Signed-off-by: Dmitry Osipenko --- drivers/memory/tegra/tegra30-emc.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/drivers/memory/tegra/tegra30-emc.c b/drivers/memory/tegra/tegra30-emc.c index d0926088360a..3488786da03b 100644 --- a/drivers/memory/tegra/tegra30-emc.c +++ b/drivers/memory/tegra/tegra30-emc.c @@ -988,6 +988,11 @@ static struct device_node *emc_find_node_by_ram_code(struct device *dev) u32 value, ram_code; int err; + if (of_get_child_count(dev->of_node) == 0) { + dev_info(dev, "device-tree doesn't have memory timings\n"); + return NULL; + } + ram_code = tegra_read_ram_code(); for_each_child_of_node(dev->of_node, np) { @@ -1057,6 +1062,9 @@ static long emc_round_rate(unsigned long rate, struct tegra_emc *emc = arg; unsigned int i; + if (!emc->num_timings) + return clk_get_rate(emc->clk); + min_rate = min(min_rate, emc->timings[emc->num_timings - 1].rate); for (i = 0; i < emc->num_timings; i++) { @@ -1262,16 +1270,6 @@ static int tegra_emc_probe(struct platform_device *pdev) struct tegra_emc *emc; int err; - if (of_get_child_count(pdev->dev.of_node) == 0) { - dev_info(&pdev->dev, - "device-tree node doesn't have memory timings\n"); - return -ENODEV; - } - - np = emc_find_node_by_ram_code(&pdev->dev); - if (!np) - return -EINVAL; - emc = devm_kzalloc(&pdev->dev, sizeof(*emc), GFP_KERNEL); if (!emc) { of_node_put(np); @@ -1285,10 +1283,13 @@ static int tegra_emc_probe(struct platform_device *pdev) emc->clk_nb.notifier_call = emc_clk_change_notify; emc->dev = &pdev->dev; - err = emc_load_timings_from_dt(emc, np); - of_node_put(np); - if (err) - return err; + np = emc_find_node_by_ram_code(&pdev->dev); + if (np) { + err = emc_load_timings_from_dt(emc, np); + of_node_put(np); + if (err) + return err; + } emc->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(emc->regs))