From patchwork Mon Sep 20 18:11:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12506123 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=ham 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 D85E9C433F5 for ; Mon, 20 Sep 2021 18:13:08 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A67576128E for ; Mon, 20 Sep 2021 18:13:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A67576128E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C52BE6E817; Mon, 20 Sep 2021 18:12:53 +0000 (UTC) Received: from mail-lf1-x132.google.com (mail-lf1-x132.google.com [IPv6:2a00:1450:4864:20::132]) by gabe.freedesktop.org (Postfix) with ESMTPS id BF5096E7F1 for ; Mon, 20 Sep 2021 18:12:34 +0000 (UTC) Received: by mail-lf1-x132.google.com with SMTP id m3so68774780lfu.2 for ; Mon, 20 Sep 2021 11:12:34 -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=pDQapQpMTMG+5ax8sj6UcM6ei+Z3cyhzieYT2TjdsCK6ElBnr5NrvqifRdtBTn7qwN nqsQVmboHIsHzG18PXVBRvZWyuz+ywEENVNyWb6B16SELvXkmM2QZO1OYAEyZLrLeXjN aDqiTehx99ddDeH9FEZL27f/faLgFxZrkga01PttDv0arowJXoity0lMYcgMzAcRL/RA PZXCLtGEVigGo5A1i/ioQPKvJ/z3O3N+STrrAi8tpQZGIY8Btf41apAT+tCYPsljn93x ALGG7kVKiFLrmyJftgXVXBgUhyB0z/huYNT+2uRsHUwzsyzdpNBl9ajpckjgI4ROGwoZ PDXA== X-Gm-Message-State: AOAM531EANL/rIG7lnvN0mT5Q6KQ5cyLViZAgQCzW9Crn3VATtCWYlpn 8d0qVMREe/Z6U1RlS9lEgFGIT3dKRns= 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_Kleine-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 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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);