From mboxrd@z Thu Jan 1 00:00:00 1970 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 BC314C433EF for ; Tue, 21 Sep 2021 02:42:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A754E6044F for ; Tue, 21 Sep 2021 02:42:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231418AbhIUCn2 (ORCPT ); Mon, 20 Sep 2021 22:43:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238080AbhIUCDI (ORCPT ); Mon, 20 Sep 2021 22:03:08 -0400 Received: from mail-lf1-x136.google.com (mail-lf1-x136.google.com [IPv6:2a00:1450:4864:20::136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28988C14092C; Mon, 20 Sep 2021 11:12:33 -0700 (PDT) Received: by mail-lf1-x136.google.com with SMTP id t10so64978232lfd.8; Mon, 20 Sep 2021 11:12:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=jkm6XIjMcFvBv/Q8SMVuuUrOs216TrQ7UEhmgPQFIpc=; b=AaRBZPLDR+Kst0J6B8/r8JAR7iOBhbKOBpoVNkl9gjm3N+roOd89PhBOc4NiwG1Hun hcP6vI6fjUMTdeWo3QYdgwSupPHFGdceUsLJLd7gnDIOlRDoPsbddt9aJ3FnmEdUOE0n DahWqhgtBgCF1t8DDLmjLDrDcCHV0iRptuvRyfdQ7Z7ZsQYerxbqSaVkyaVzKyZqifj5 I+a6/jozizZCAeyvLjsQA4OiR5eqUd+FuuxraHbZ+tBLyhduNWyOT+HpfXOy6yhRsGtJ zDpKlw5SQxQ7vof7G6wv0IXZ+L6OT9fdy2pqwvxjzK5mYsfJZVKsxIRQeFau014NCzzy 60ww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=jkm6XIjMcFvBv/Q8SMVuuUrOs216TrQ7UEhmgPQFIpc=; b=KdJZrZ/6OG6ASt6K/DUA5FlcswTocDkn8WjPzobpbm2hNxqv+QKIax7Xcy++DwQcxd RM0qrArvqWo0Oke/wAOLpy+jDmhOCRIgirN1F4Xn6CgNYHjMbtIhUXYWiaIS2TGBiewa iVL6ED7y1IFLEjUyj8IVz9nd33KNSDVzymZ57z+6gI/LMYjaNkYEzjqWuTZmIiq0NYON c8DaDwgWliPzMuBzomJUncUOTEu2MkPbifhHOHeMu7sjI6jMv9VKDuX56gh0nZh8V/Co R4OC3JRTve9nVMt2bXyJiNtgGhzTyYPg2Hc8u8QNy1gm4+VWna6h3WBatITCXAgl9hEa tqkA== X-Gm-Message-State: AOAM530hbkLC6CEn2HSReJpLLp29wi5ifmtKtgWXl/pAN9uA1ATKxu6T VPmWwQSMeqm6R9zdTue4O7U= X-Google-Smtp-Source: ABdhPJyf6sQAhsGtHx+SSBxaMArpxSssCTj2xbvUgwVarTw3ZVWMrMDiQt7a2Z1ptBZ8/syBj4VT1w== X-Received: by 2002:a2e:a909:: with SMTP id j9mr11997665ljq.374.1632161551233; Mon, 20 Sep 2021 11:12:31 -0700 (PDT) Received: from localhost.localdomain (46-138-151-206.dynamic.spd-mgts.ru. [46.138.151.206]) by smtp.gmail.com with ESMTPSA id u3sm1775677lju.107.2021.09.20.11.12.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Sep 2021 11:12:30 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Ulf Hansson , Viresh Kumar , Stephen Boyd , Peter De Schrijver , Mikko Perttunen , Peter Chen , Lee Jones , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Nishanth Menon , Adrian Hunter , Rob Herring , Michael Turquette Cc: linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, linux-staging@lists.linux.dev, linux-pwm@vger.kernel.org, linux-mmc@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org, Mark Brown , Vignesh Raghavendra , Richard Weinberger , Miquel Raynal , Lucas Stach , Stefan Agner , Mauro Carvalho Chehab , David Heidelberg Subject: [PATCH v12 25/35] soc/tegra: fuse: Reset hardware Date: Mon, 20 Sep 2021 21:11:35 +0300 Message-Id: <20210920181145.19543-26-digetx@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210920181145.19543-1-digetx@gmail.com> References: <20210920181145.19543-1-digetx@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org The FUSE controller is enabled at a boot time. Reset it in order to put hardware and clock into clean and disabled state. Signed-off-by: Dmitry Osipenko --- drivers/soc/tegra/fuse/fuse-tegra.c | 25 +++++++++++++++++++++++++ drivers/soc/tegra/fuse/fuse.h | 1 + 2 files changed, 26 insertions(+) diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c index f2151815db58..cc032729a143 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra.c +++ b/drivers/soc/tegra/fuse/fuse-tegra.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -243,6 +244,30 @@ static int tegra_fuse_probe(struct platform_device *pdev) goto restore; } + fuse->rst = devm_reset_control_get_optional(&pdev->dev, "fuse"); + if (IS_ERR(fuse->rst)) { + err = PTR_ERR(fuse->rst); + dev_err(&pdev->dev, "failed to get FUSE reset: %pe\n", + fuse->rst); + goto restore; + } + + /* + * FUSE clock is enabled at a boot time, hence this resume/suspend + * disables the clock besides the h/w resetting. + */ + err = pm_runtime_resume_and_get(&pdev->dev); + if (err) + goto restore; + + err = reset_control_reset(fuse->rst); + pm_runtime_put(&pdev->dev); + + if (err < 0) { + dev_err(&pdev->dev, "failed to reset FUSE: %d\n", err); + goto restore; + } + /* release the early I/O memory mapping */ iounmap(base); diff --git a/drivers/soc/tegra/fuse/fuse.h b/drivers/soc/tegra/fuse/fuse.h index de58feba0435..1b719d85bd04 100644 --- a/drivers/soc/tegra/fuse/fuse.h +++ b/drivers/soc/tegra/fuse/fuse.h @@ -43,6 +43,7 @@ struct tegra_fuse { void __iomem *base; phys_addr_t phys; struct clk *clk; + struct reset_control *rst; u32 (*read_early)(struct tegra_fuse *fuse, unsigned int offset); u32 (*read)(struct tegra_fuse *fuse, unsigned int offset); -- 2.32.0