From patchwork Sun Jun 7 18:54:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 1304857 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; 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.a=rsa-sha256 header.s=20161025 header.b=k56xqon4; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49g5LW1Knqz9sRk for ; Mon, 8 Jun 2020 05:00:35 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728143AbgFGS5R (ORCPT ); Sun, 7 Jun 2020 14:57:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57080 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728065AbgFGS5Q (ORCPT ); Sun, 7 Jun 2020 14:57:16 -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 16D70C061A0E; Sun, 7 Jun 2020 11:57:16 -0700 (PDT) Received: by mail-lj1-x241.google.com with SMTP id 9so17747665ljc.8; Sun, 07 Jun 2020 11:57:16 -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=pFrdABztThT716Jqq69x971kwm0U7felWA1j1wl/1bI=; b=k56xqon4R+K/TQIXYrna6CxZqeeBZXJUJjLkrXhbn/1IudCgzPhWq8iqFLm120YG7B BO7HMLeaqtrE/+cZumDn2VQaNZIjdAB+3Z/pfTQPAPnBVYEQFrUcdYxcU/u70G+mppeY QhrlBffFq+Ycn7SayICgYe/uaYJzlBsl4yLEMtKXm3fQa/mdND0okHb5TtJGmQumjB1Q 32bFFqgcX2c2e9GeM+yMQIoGn/SVVQhx3NYikBxPJmOs3sQF9GLOY6+kznr2c8AkKpub ho6lKbeXMUZUWjiMRf5TvGyZRWtQRpx1O0Qn9XH465HY4Ew6osUvvZT8gU19aZgzWbQG HnSg== 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=pFrdABztThT716Jqq69x971kwm0U7felWA1j1wl/1bI=; b=YHD1OkZNcomch+cAecYvONSI8Rh6iNUYH0C3fEYa0PmtnLMRHBMwyuVgYeNSYrbuDl zo7Sj0U78Qewmz4y5MNkAHlTr+mmgErQFjGzvNUjPAAiREnTb4iNc3PLWr4S2l6pj5GQ +RCvZ+vv3Qs8Oq3E0kMttUuFbqXymwREvMhGJ0mOBzoh2y5787CwVn7aGrGTx3JdfS36 GECQ4TLF+k6S+bFZQHhlLy57+bOIYEoOUKxcq7L5s9tdxHTSva8ATlXODh9ZYXOBVAwb ZIApH5pskZD4DXxui8K5EnT0yRstEBC4qfqI80H7zifY+ixeQrns5MH79zVJTfcLXL0E 1wtw== X-Gm-Message-State: AOAM532H/LUAcf0NZqbA3H8aJC3U8e5Dn/ffVyU+KTJ/jhhU5SSVweVg dm18uYUnRXEIx9oi31RHUns= X-Google-Smtp-Source: ABdhPJyGSJXaUvZ/7BCEtk384hJS0GQy9Oe46xyflS+AiCq0x4jwKwnU8TG6cLBVse3aTYldcwl/sg== X-Received: by 2002:a2e:b0db:: with SMTP id g27mr9549002ljl.425.1591556234651; Sun, 07 Jun 2020 11:57:14 -0700 (PDT) Received: from localhost.localdomain (79-139-237-54.dynamic.spd-mgts.ru. [79.139.237.54]) by smtp.gmail.com with ESMTPSA id e21sm3650953ljb.135.2020.06.07.11.57.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 07 Jun 2020 11:57:14 -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: =?utf-8?b?QXJ0dXIgxZp3aWdvxYQ=?= , 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 v3 04/39] memory: tegra20-emc: Make driver modular Date: Sun, 7 Jun 2020 21:54:55 +0300 Message-Id: <20200607185530.18113-5-digetx@gmail.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200607185530.18113-1-digetx@gmail.com> References: <20200607185530.18113-1-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 This patch adds modularization support to the Tegra20 EMC driver. Driver now can be compiled as a loadable kernel module. Signed-off-by: Dmitry Osipenko --- drivers/memory/tegra/Kconfig | 2 +- drivers/memory/tegra/tegra20-emc.c | 16 +++++++++++----- 2 files changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/memory/tegra/Kconfig b/drivers/memory/tegra/Kconfig index 9f0a96bf9ccc..7e0e1ef87763 100644 --- a/drivers/memory/tegra/Kconfig +++ b/drivers/memory/tegra/Kconfig @@ -8,7 +8,7 @@ config TEGRA_MC NVIDIA Tegra SoCs. config TEGRA20_EMC - bool "NVIDIA Tegra20 External Memory Controller driver" + tristate "NVIDIA Tegra20 External Memory Controller driver" default y depends on ARCH_TEGRA_2x_SOC help diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index 027f46287dbf..035d9251e28a 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -724,6 +724,13 @@ 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: @@ -736,6 +743,7 @@ static const struct of_device_id tegra_emc_of_match[] = { { .compatible = "nvidia,tegra20-emc", }, {}, }; +MODULE_DEVICE_TABLE(of, tegra_emc_of_match); static struct platform_driver tegra_emc_driver = { .probe = tegra_emc_probe, @@ -745,9 +753,7 @@ 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_DESCRIPTION("NVIDIA Tegra20 EMC driver"); +MODULE_LICENSE("GPL v2");