From patchwork Wed Nov 11 01:14:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 11896065 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 CCC53921 for ; Wed, 11 Nov 2020 01:18:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AAD6A221F9 for ; Wed, 11 Nov 2020 01:18:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="RbTk3q7R" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732584AbgKKBRt (ORCPT ); Tue, 10 Nov 2020 20:17:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48734 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732692AbgKKBPW (ORCPT ); Tue, 10 Nov 2020 20:15:22 -0500 Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 49C9FC0613D1; Tue, 10 Nov 2020 17:15:22 -0800 (PST) Received: by mail-wm1-x344.google.com with SMTP id c9so518232wml.5; Tue, 10 Nov 2020 17:15:22 -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=sD7fDvHXiFm4cObgHl+AP6M6ck+IL5n1B/jSpmdDcPc=; b=RbTk3q7RRknepGH85+194oMbJV9LgjnL3ciRibGPuNbAijPEkMeaoXu6Q8x+3QGOYn wGeB4uh+kvLlmnP6btaQxproSvbqDdomplczcs+6JfHcW9zanRk0I6IWgIO20GS63tNU z7IbYjCdEgVsFiIt4guwH8mQEAk9mzN0JdCxRv5shFtyeJ0WyHswjsbhXZhq7U4cfXgK +BTaiEDpHXiOpOeYi3U2EWWeSnR0HNovG+uDTFKrMwCiBfgZ7UHlaUJnZu6KCw9eS4yd fJAfUkjNrJTQVRp3EM4NA241LWEXA6X948lxnilQwY/lIdDC7IqxA7FTEqB/z9b3TXM+ 4wEg== 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=sD7fDvHXiFm4cObgHl+AP6M6ck+IL5n1B/jSpmdDcPc=; b=ChsmLjSRAr0U1GwvKHbymMAgzSieW+lUfhhW5BkXwarrZTUscqvsY3rbaPHMT1bodJ rvgn1BR0DpRdhdSCnM+5OlQrzVBUEWg0DdDI5l1cOuxrwgnf3klsO+3Chhlwa3N4ZkY8 H9/ZOlrjfu1Cv8x+GTLfJtJFdcAGX99uC3WE/ZTOrFEafeeqqM0Pwuc8HsHd0+RssUK5 jG12RPmdLlfT+tlO3/7NcilOZQ4TuxqWWsvAmvFJKFzFuQHQOev2q0oUOClbSas56X5O 8NtHGOqLTbVylv61IPW4CQwzGjQJFpoO8dwhnIlpRLMhiIR73q6jVSzHISvEc9IkyijZ ZqMw== X-Gm-Message-State: AOAM5318fFtIEVcDd27N5cM5jeKeZJdwQuD1JkXtJ1YYVjCGIQnfokNh CoezFrAH0m8NlO9xRNNA0XQ= X-Google-Smtp-Source: ABdhPJzNduKCx2DAGT1kO0vBmCfERMYx7fsFrNi6wBTY2U9wsA00dOl7NAFy7l9BVNsyp+sLa6cJiQ== X-Received: by 2002:a1c:6a0d:: with SMTP id f13mr913973wmc.172.1605057320997; Tue, 10 Nov 2020 17:15:20 -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.35.2020.11.10.17.15.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Nov 2020 17:15:20 -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 07/26] memory: tegra30-emc: Make driver modular Date: Wed, 11 Nov 2020 04:14:37 +0300 Message-Id: <20201111011456.7875-8-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 Add modularization support to the Tegra30 EMC driver, which now can be compiled as a loadable kernel module. Signed-off-by: Dmitry Osipenko --- drivers/memory/tegra/Kconfig | 2 +- drivers/memory/tegra/mc.c | 3 +++ drivers/memory/tegra/tegra30-emc.c | 17 ++++++++++++----- 3 files changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/memory/tegra/Kconfig b/drivers/memory/tegra/Kconfig index 8cc1ec5be443..2a4a16bcf91c 100644 --- a/drivers/memory/tegra/Kconfig +++ b/drivers/memory/tegra/Kconfig @@ -21,7 +21,7 @@ config TEGRA20_EMC external memory. config TEGRA30_EMC - bool "NVIDIA Tegra30 External Memory Controller driver" + tristate "NVIDIA Tegra30 External Memory Controller driver" default y depends on TEGRA_MC && ARCH_TEGRA_3x_SOC help diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index a7e6a8e4c95a..44064de962c2 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -6,6 +6,7 @@ #include #include #include +#include #include #include #include @@ -346,6 +347,7 @@ int tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate) return 0; } +EXPORT_SYMBOL_GPL(tegra_mc_write_emem_configuration); unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc) { @@ -357,6 +359,7 @@ unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc) return dram_count; } +EXPORT_SYMBOL_GPL(tegra_mc_get_emem_device_count); static int load_one_timing(struct tegra_mc *mc, struct tegra_mc_timing *timing, diff --git a/drivers/memory/tegra/tegra30-emc.c b/drivers/memory/tegra/tegra30-emc.c index 1be28e28ec34..d0926088360a 100644 --- a/drivers/memory/tegra/tegra30-emc.c +++ b/drivers/memory/tegra/tegra30-emc.c @@ -1330,6 +1330,13 @@ static int tegra_emc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, emc); tegra_emc_debugfs_init(emc); + /* + * Don't allow the kernel module to be unloaded. Unloading adds some + * extra complexity which doesn't really worth the effort in a case of + * this driver. + */ + try_module_get(THIS_MODULE); + return 0; unset_cb: @@ -1380,6 +1387,7 @@ static const struct of_device_id tegra_emc_of_match[] = { { .compatible = "nvidia,tegra30-emc", }, {}, }; +MODULE_DEVICE_TABLE(of, tegra_emc_of_match); static struct platform_driver tegra_emc_driver = { .probe = tegra_emc_probe, @@ -1390,9 +1398,8 @@ static struct platform_driver tegra_emc_driver = { .suppress_bind_attrs = true, }, }; +module_platform_driver(tegra_emc_driver); -static int __init tegra_emc_init(void) -{ - return platform_driver_register(&tegra_emc_driver); -} -subsys_initcall(tegra_emc_init); +MODULE_AUTHOR("Dmitry Osipenko "); +MODULE_DESCRIPTION("NVIDIA Tegra30 EMC driver"); +MODULE_LICENSE("GPL v2");