From patchwork Sun Nov 14 19:34:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12618389 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 03BACC433FE for ; Sun, 14 Nov 2021 19:41:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E52B660F55 for ; Sun, 14 Nov 2021 19:41:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236442AbhKNTo2 (ORCPT ); Sun, 14 Nov 2021 14:44:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57650 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236331AbhKNTjT (ORCPT ); Sun, 14 Nov 2021 14:39:19 -0500 Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA59EC0613B9; Sun, 14 Nov 2021 11:36:23 -0800 (PST) Received: by mail-lf1-x12e.google.com with SMTP id y26so37505414lfa.11; Sun, 14 Nov 2021 11:36:23 -0800 (PST) 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=lzFtA16LetdYQr69hwWW6HmkTpjJj0vMycP3EfoabOc=; b=EE/chLe/LsFvIUSeQyQmGN91PrUcAuSyz0tVUW7sGhNUufPV6/cTlGndbYNLVSKxi+ pNeJ/5bVtPYdNvdEoVffcIqOFzUpwuinreJBdVasxtx8x8vZ+2daOqSDO+rcZM2hpyUU svPqIbepnvLGSTm1Pm0FET5yEAw1i9JaThSjz+lx7KFyuqAoCfq6/CPaGsefoMD0URW7 q0Gd8/cw2W5XymGDWKQnC7SzVOxkQK+rl9z41sC9M9AgwFXdg47UcFcUx0DCba+Tl7Zc ko2LcjI3O7767rW6hRJ5ncO7fyWi8DJnkWdDadSpTXNygghRX/vemDtc+qJHPygtpwnK hlng== 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=lzFtA16LetdYQr69hwWW6HmkTpjJj0vMycP3EfoabOc=; b=U41EB8VBPX3lfBsLK1iXo8X6WGNeN8inhRSyODehyfpggpDk9B3Nw1AfuHQVxvThto ZoKIXl+FYh6MdXdQnX+rKUzOSHOxcmam6as//i7l7orvduHbGergiVI6kUoUOa4gOGVF uDMB7uEe146zmyJuf3GyXBFxWf8YOMW5RGgQ+G8z5ux7egO6HOdgzvFmXNS9GN1ppT2r eqHxfUIvWepi5Kgry5x9fanXxWSNQMGZzeHW8AhCElXf3WscoO6EITjpBQWehA1kDZY4 wcImb1sHSFZ4PAe9QxyYBtfSX1wJLCv2zdBwxjDr/ycVx7ThzHbYksHAoehKCKU8bGF2 OgDg== X-Gm-Message-State: AOAM5319gduwBP279+WyWj/8O+gMCuSd3cWVBoz6b1vXRBe+Fwz5p1ij EIILMOVWpRfp3xv1hS4beKg= X-Google-Smtp-Source: ABdhPJwzhTah3r572OPXiaN6H8ghNMzmv0cpc8MTKf0k+5qKxAcGDcGG3yg9M33eUKPg9UQxs2539A== X-Received: by 2002:a05:6512:689:: with SMTP id t9mr30313571lfe.614.1636918582380; Sun, 14 Nov 2021 11:36:22 -0800 (PST) Received: from localhost.localdomain (46-138-46-211.dynamic.spd-mgts.ru. [46.138.46.211]) by smtp.gmail.com with ESMTPSA id p18sm1191280lfu.127.2021.11.14.11.36.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Nov 2021 11:36:22 -0800 (PST) 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 v15 27/39] soc/tegra: fuse: Reset hardware Date: Sun, 14 Nov 2021 22:34:23 +0300 Message-Id: <20211114193435.7705-28-digetx@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211114193435.7705-1-digetx@gmail.com> References: <20211114193435.7705-1-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. Reviewed-by: Ulf Hansson 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);