From patchwork Sun Oct 27 18:08:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?Q3PDs2vDoXMgQmVuY2U=?= X-Patchwork-Id: 13852714 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D28A5D13572 for ; Sun, 27 Oct 2024 18:11:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=CQYMBjKa/6089/ZeL5xAOUfW85stKiaNK4L4qGdqr04=; b=zP8bFWh/p98l7kt98L8S/OdtdC Ds9sxtdlIDgh/xYMRPySP7tdz52lgXe84g2l86WMGkmw4yIdi9AxMKt7FNNTb3C7HiSCLm4GDEtDl hmcJpus0SSvmaHpm4s90BgNHMOMgOGWdcbYAcxNVWJ7u/tJnou/VQ1wLOcY/RPKYWBtkIHzgf4bhY zvhLRITcVUWjIdWgHZf7muZIteJcruExIiLcL3oox24bUoQxvB/zGHs/SNfe+FCpIisg4LHli0nTh ksz/guLN0c8eRXA3PEhfj8d7h2vHrmiRU5mvHKKbAMPEtf10YneyfPTqsyMACXRF6mdOePHGQe/Fu YR1BA1ow==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t57jp-00000008eZA-0SEf; Sun, 27 Oct 2024 18:11:41 +0000 Received: from fw2.prolan.hu ([193.68.50.107]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t57iE-00000008eSo-0r1N for linux-arm-kernel@lists.infradead.org; Sun, 27 Oct 2024 18:10:03 +0000 Received: from proxmox-mailgw.intranet.prolan.hu (localhost.localdomain [127.0.0.1]) by proxmox-mailgw.intranet.prolan.hu (Proxmox) with ESMTP id 655CBA0472; Sun, 27 Oct 2024 19:10:00 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=prolan.hu; h=cc :cc:content-transfer-encoding:content-type:content-type:date :from:from:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to; s=mail; bh=CQYMBjKa/6089/ZeL5xA OUfW85stKiaNK4L4qGdqr04=; b=FMJkX+bJSwPqBMXD4Q4BKkFtLymd0M6lsHR9 be8afXm3uNXRMAY/T4H4ReFiLi3GquQaI/CJq9/45fz+ksGhWc3KHHPdGAKdOyGV wBfxn0anf2F2n76ghD/OeVyObZjwjoNahcCPcFMBWlhiLfkzTwQ+jOm6S7X4DMzo r81Xl97O0bUcfHB5qGdZ6SlSjz0Isruj68gqD/TH8oFZru61H0K2q4B7Rdur0NIo IrpGF4wQAlO4vTVzICjHRludv77cGemmv7b3nBhO4JgG7LP21Em0r/+7DPfmvuyT JMSXXJ+OiOda0T8H7McGgSwoyo3JVYFt5xF+gNakl7mv/1jS3oophSxMH+KFkMTa v15WEqy/sVOAvnlaOZyqX6ndG6mcvTOh4iqP1DwETJmRNgbNy0Aw7CxDUVD4Me6M smPeWjadffqIZxwTUu5rWvZ87ky24p7MMDL47/sOUSbUolXVLvMIk3YMgkGVLytB 9UaxrxDKIQn0cn3XMw+Oq1HybCnhW9Hdgfd1sc0mnAZhbfxwIyx0h5sZj1FfeqoJ An9dSBo8U0ok7Ryl/IoiCqYlgifS70zGDweuFvsA9bQaQV39QkU/jDBxFzTEUsz5 JWjodgTGf2MjiIhDBuA3FJedJed/ewaVQUcJIaZebF/npECMJBkUS4FxjpMvFbYD VZ3TpUY= From: =?utf-8?b?Q3PDs2vDoXMsIEJlbmNl?= To: , , , CC: Mesih Kilinc , =?utf-8?b?Q3PDs2vDoXMsIEJlbmNl?= , Vinod Koul , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , "Philipp Zabel" Subject: [PATCH v3 02/10] dma-engine: sun4i: Add has_reset option to quirk Date: Sun, 27 Oct 2024 19:08:55 +0100 Message-ID: <20241027180903.2035820-2-csokas.bence@prolan.hu> X-Mailer: git-send-email 2.34.1 In-Reply-To: <4b614d6c-6b46-438a-b5c3-de1e69f0feb8@prolan.hu> References: MIME-Version: 1.0 X-ESET-AS: R=OK;S=0;OP=CALC;TIME=1730052599;VERSION=7978;MC=629135376;ID=158215;TRN=0;CRV=0;IPC=;SP=0;SIPS=0;PI=3;F=0 X-ESET-Antispam: OK X-EsetResult: clean, is OK X-EsetId: 37303A29ACD94855677C63 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241027_111002_431779_BD00FEEF X-CRM114-Status: GOOD ( 15.79 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Mesih Kilinc Allwinner suniv F1C100s has a reset bit for DMA in CCU. Sun4i do not has this bit but in order to support suniv we need to add it. So add support for reset bit. Signed-off-by: Mesih Kilinc [ csokas.bence: Rebased and addressed comments ] Signed-off-by: Csókás, Bence --- Notes: Changes in v2: * Call reset_control_deassert() unconditionally, as it supports optional resets * Use dev_err_probe() * Whitespace Changes in v3: * More dev_err_probe() drivers/dma/sun4i-dma.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/dma/sun4i-dma.c b/drivers/dma/sun4i-dma.c index d472f57a39ea..f485d6f378c0 100644 --- a/drivers/dma/sun4i-dma.c +++ b/drivers/dma/sun4i-dma.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -159,6 +160,7 @@ struct sun4i_dma_config { u8 ddma_drq_sdram; u8 max_burst; + bool has_reset; }; struct sun4i_dma_pchan { @@ -208,6 +210,7 @@ struct sun4i_dma_dev { int irq; spinlock_t lock; const struct sun4i_dma_config *cfg; + struct reset_control *rst; }; static struct sun4i_dma_dev *to_sun4i_dma_dev(struct dma_device *dev) @@ -1215,6 +1218,16 @@ static int sun4i_dma_probe(struct platform_device *pdev) return PTR_ERR(priv->clk); } + if (priv->cfg->has_reset) { + priv->rst = devm_reset_control_get_exclusive(&pdev->dev, + NULL); + if (IS_ERR(priv->rst)) { + dev_err_probe(&pdev->dev, PTR_ERR(priv->rst), + "Failed to get reset control\n"); + return PTR_ERR(priv->rst); + } + } + platform_set_drvdata(pdev, priv); spin_lock_init(&priv->lock); @@ -1287,6 +1300,14 @@ static int sun4i_dma_probe(struct platform_device *pdev) return ret; } + /* Deassert the reset control */ + ret = reset_control_deassert(priv->rst); + if (ret) { + dev_err_probe(&pdev->dev, ret, + "Failed to deassert the reset control\n"); + goto err_clk_disable; + } + /* * Make sure the IRQs are all disabled and accounted for. The bootloader * likes to leave these dirty @@ -1356,6 +1377,7 @@ static struct sun4i_dma_config sun4i_a10_dma_cfg = { .ddma_drq_sdram = SUN4I_DDMA_DRQ_TYPE_SDRAM, .max_burst = SUN4I_MAX_BURST, + .has_reset = false, }; static const struct of_device_id sun4i_dma_match[] = {