From patchwork Mon Oct 25 22:40:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12583311 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 824C5C433F5 for ; Mon, 25 Oct 2021 22:48:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D4EB60295 for ; Mon, 25 Oct 2021 22:48:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235546AbhJYWub (ORCPT ); Mon, 25 Oct 2021 18:50:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235503AbhJYWth (ORCPT ); Mon, 25 Oct 2021 18:49:37 -0400 Received: from mail-lj1-x22e.google.com (mail-lj1-x22e.google.com [IPv6:2a00:1450:4864:20::22e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A10E3C06118B; Mon, 25 Oct 2021 15:46:12 -0700 (PDT) Received: by mail-lj1-x22e.google.com with SMTP id w23so11207314lje.7; Mon, 25 Oct 2021 15:46:12 -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=q0CiXiCgdAf7V0lL5IR2r/8ROuTZxmoZVkGc0FfQhBU=; b=R8xw42jJPC/nZlTh96fip2LUlB7X8ag1mdDfAb+xZm92uSpxOhkrnKOTV6Vibynjxp QIL8kuID5lNIBsdk9jziNglv8mXqkqlusjl5lPkehEM+4SH9tlUJOapT2HOE7AXHf2UZ N4HgHnTnR84SrLObUTuG57D3rAZxE1esK2MyecGj3wh0FzFrnXwpbwE2Dx0luRlraoRY d0KhAbA0VbtAQ7qIVSkmAf7ZPrBnI/BhSnxpELlHQJ2tZdLfW3KNizm3iiTjYlwLTkya BnelVNq2RsZQOgIacv7BwEylvZbmrCQlpTKrybm9rGGQkyzzqQ4oZzTNJklcFlYR1dl0 zcIg== 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=q0CiXiCgdAf7V0lL5IR2r/8ROuTZxmoZVkGc0FfQhBU=; b=Jvc6IsNKiLsfRxeINuOn/3amH+PV4QKzZyYEbC1F0oP69sWcaXWeCry3T2gbMkkOKr hphvLEaFrI+0J1EkLuCfMsFP1uwAbNx8sKuzBVKj95f0k9QTB/h0nG/zVRyFOR1Gb0ls LvSVUOKj157oHPSpoSvRrySrlzLjspBRBpNJG1MzxKNpxT7W3ttVG0Cszhu2HfaTU9aV rH2HzjVrICiYHVXXqzxvu6wbHSUur4E3ErnhN33XtfmzTWN12FPCmDryhfQBy228yr1p aVKQFJ+aWWREwjDwop6YtqIV+oeK2tg611535MpFwtJWHhu4ca0RY47hwSIDC0jqADoL ZmmQ== X-Gm-Message-State: AOAM532Ph/GBZFri5y/s8l+0/IX+cUQD5f3NVDB7NOUpV7aR/5epDeqa 2ShS4CVdu320Wx7CdJOwRvc= X-Google-Smtp-Source: ABdhPJyu68X54r68x9sMK6kFrngVo1ABGEkqpbluzyUNtkPSxX9NOIZVlt6ut2/CeIpId7gtQXJHiA== X-Received: by 2002:a2e:969a:: with SMTP id q26mr15421975lji.325.1635201971086; Mon, 25 Oct 2021 15:46:11 -0700 (PDT) Received: from localhost.localdomain (46-138-41-28.dynamic.spd-mgts.ru. [46.138.41.28]) by smtp.gmail.com with ESMTPSA id t20sm2040956lft.240.2021.10.25.15.46.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Oct 2021 15:46:10 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Ulf Hansson , Viresh Kumar , Stephen Boyd , Peter De Schrijver , Mikko Perttunen , Lee Jones , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Nishanth Menon , Adrian Hunter , Michael Turquette Cc: linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-pwm@vger.kernel.org, linux-mmc@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-clk@vger.kernel.org, David Heidelberg Subject: [PATCH v14 27/39] soc/tegra: fuse: Reset hardware Date: Tue, 26 Oct 2021 01:40:20 +0300 Message-Id: <20211025224032.21012-28-digetx@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211025224032.21012-1-digetx@gmail.com> References: <20211025224032.21012-1-digetx@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@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);