From patchwork Sun Nov 14 19:34:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12618393 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 697A3C433F5 for ; Sun, 14 Nov 2021 19:41:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 53B9A6112E for ; Sun, 14 Nov 2021 19:41:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236380AbhKNToh (ORCPT ); Sun, 14 Nov 2021 14:44:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57658 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236340AbhKNTjV (ORCPT ); Sun, 14 Nov 2021 14:39:21 -0500 Received: from mail-lf1-x135.google.com (mail-lf1-x135.google.com [IPv6:2a00:1450:4864:20::135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10003C061200; Sun, 14 Nov 2021 11:36:25 -0800 (PST) Received: by mail-lf1-x135.google.com with SMTP id bu18so37671026lfb.0; Sun, 14 Nov 2021 11:36:24 -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=5Vh+d6UNMnZ6MOnoLHUj11In0tvNGndmbN9w3wCCbo0=; b=V5CpZ4qx89YM+eHcvbGB0Hxoao7KF8FRUmRKdEmbwLmWTOdanGLK4kxtnhZwUvx4t2 Juko+ccWMZb+07HzULLHuM7rXwVs/GOs/RnetId2p6ncoypMC2a1EtNy0+Aluyrca7mo U/bSIepZ8cqretS1RtGnbXhtkKtrIuoq3Kuqj2McuhuC35ZSnwIGQ+1dtq1+TnQ2K6DC d6FgDv5r3F2RDvP970kjGfyB5aVkuelJyf6m2UfJlL12mT50qZbWD1Obv7IiiJZnBl3Q vwzHvVaC+/RoUZpqwaVaCUk+7YvG/c4C5cwZqrZPTrMcimVlpThc1c2R8uHHu/X44U0A fY0A== 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=5Vh+d6UNMnZ6MOnoLHUj11In0tvNGndmbN9w3wCCbo0=; b=0D+A6HaSy0ZE6f3BCMhjlIgK44DU5exLDFcrxl4tvHodBmxDZuFdh1TWhRfAJp/dXj PUO3ehIjtSt0GJAWD8TALLzaKikna4DsxYMyzqq6sS3h/lqF8WNTxuZUviczigIZUcDf xY19uJSSzFJyPfQfsLP01dtAsv/45yTsL08stf2JqRybYuivJ3Shy5jnDj8Rp0wzJiNT ECOiBmhohZAaeXbBjhWW9sSBYPcCi5KA6yXPXwEpCjFz4bY1Wd8K2HNot4bbxokab7wx K81OR0EkxWjfrwmhIcIYo+7KSDOHnv5QWqR00djiFgXrKIdoLF+DK4TSvnTF/P9jCgJf zfeA== X-Gm-Message-State: AOAM532o4Zr2qyTr506igeI82tXtAFsgwnUiwqyegNVgH4zIxh6UbDnk SWfi6MmesWapOvR48gTuhwg= X-Google-Smtp-Source: ABdhPJxgyEHdIenkSXzjRl2g+3Xlpq+YLJfRdiy9+pcVz9oUh9JDkwQNs+Ldj7oJKU1wHcF++HeebA== X-Received: by 2002:a05:6512:3cd:: with SMTP id w13mr30302535lfp.134.1636918583435; Sun, 14 Nov 2021 11:36:23 -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.127.2021.11.14.11.36.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Nov 2021 11:36:23 -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 28/39] soc/tegra: fuse: Use resource-managed helpers Date: Sun, 14 Nov 2021 22:34:24 +0300 Message-Id: <20211114193435.7705-29-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 Use resource-managed helpers to make code cleaner and more correct, properly releasing all resources in case of driver probe error. Signed-off-by: Dmitry Osipenko --- drivers/soc/tegra/fuse/fuse-tegra.c | 32 ++++++++++++++------------ drivers/soc/tegra/fuse/fuse-tegra20.c | 33 ++++++++++++++++++++++++--- 2 files changed, 48 insertions(+), 17 deletions(-) diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c index cc032729a143..fe4f935ce73a 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra.c +++ b/drivers/soc/tegra/fuse/fuse-tegra.c @@ -182,6 +182,12 @@ static const struct nvmem_cell_info tegra_fuse_cells[] = { }, }; +static void tegra_fuse_restore(void *base) +{ + fuse->clk = NULL; + fuse->base = base; +} + static int tegra_fuse_probe(struct platform_device *pdev) { void __iomem *base = fuse->base; @@ -189,13 +195,16 @@ static int tegra_fuse_probe(struct platform_device *pdev) struct resource *res; int err; + err = devm_add_action(&pdev->dev, tegra_fuse_restore, base); + if (err) + return err; + /* take over the memory region from the early initialization */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); fuse->phys = res->start; fuse->base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(fuse->base)) { err = PTR_ERR(fuse->base); - fuse->base = base; return err; } @@ -205,19 +214,20 @@ static int tegra_fuse_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to get FUSE clock: %ld", PTR_ERR(fuse->clk)); - fuse->base = base; return PTR_ERR(fuse->clk); } platform_set_drvdata(pdev, fuse); fuse->dev = &pdev->dev; - pm_runtime_enable(&pdev->dev); + err = devm_pm_runtime_enable(&pdev->dev); + if (err) + return err; if (fuse->soc->probe) { err = fuse->soc->probe(fuse); if (err < 0) - goto restore; + return err; } memset(&nvmem, 0, sizeof(nvmem)); @@ -241,7 +251,7 @@ static int tegra_fuse_probe(struct platform_device *pdev) err = PTR_ERR(fuse->nvmem); dev_err(&pdev->dev, "failed to register NVMEM device: %d\n", err); - goto restore; + return err; } fuse->rst = devm_reset_control_get_optional(&pdev->dev, "fuse"); @@ -249,7 +259,7 @@ static int tegra_fuse_probe(struct platform_device *pdev) err = PTR_ERR(fuse->rst); dev_err(&pdev->dev, "failed to get FUSE reset: %pe\n", fuse->rst); - goto restore; + return err; } /* @@ -258,26 +268,20 @@ static int tegra_fuse_probe(struct platform_device *pdev) */ err = pm_runtime_resume_and_get(&pdev->dev); if (err) - goto restore; + return err; 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; + return err; } /* release the early I/O memory mapping */ iounmap(base); return 0; - -restore: - fuse->clk = NULL; - fuse->base = base; - pm_runtime_disable(&pdev->dev); - return err; } static int __maybe_unused tegra_fuse_runtime_resume(struct device *dev) diff --git a/drivers/soc/tegra/fuse/fuse-tegra20.c b/drivers/soc/tegra/fuse/fuse-tegra20.c index 8ec9fc5e5e4b..12503f563e36 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra20.c +++ b/drivers/soc/tegra/fuse/fuse-tegra20.c @@ -94,9 +94,28 @@ static bool dma_filter(struct dma_chan *chan, void *filter_param) return of_device_is_compatible(np, "nvidia,tegra20-apbdma"); } +static void tegra20_fuse_release_channel(void *data) +{ + struct tegra_fuse *fuse = data; + + dma_release_channel(fuse->apbdma.chan); + fuse->apbdma.chan = NULL; +} + +static void tegra20_fuse_free_coherent(void *data) +{ + struct tegra_fuse *fuse = data; + + dma_free_coherent(fuse->dev, sizeof(u32), fuse->apbdma.virt, + fuse->apbdma.phys); + fuse->apbdma.virt = NULL; + fuse->apbdma.phys = 0x0; +} + static int tegra20_fuse_probe(struct tegra_fuse *fuse) { dma_cap_mask_t mask; + int err; dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); @@ -105,13 +124,21 @@ static int tegra20_fuse_probe(struct tegra_fuse *fuse) if (!fuse->apbdma.chan) return -EPROBE_DEFER; + err = devm_add_action_or_reset(fuse->dev, tegra20_fuse_release_channel, + fuse); + if (err) + return err; + fuse->apbdma.virt = dma_alloc_coherent(fuse->dev, sizeof(u32), &fuse->apbdma.phys, GFP_KERNEL); - if (!fuse->apbdma.virt) { - dma_release_channel(fuse->apbdma.chan); + if (!fuse->apbdma.virt) return -ENOMEM; - } + + err = devm_add_action_or_reset(fuse->dev, tegra20_fuse_free_coherent, + fuse); + if (err) + return err; fuse->apbdma.config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; fuse->apbdma.config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;