From patchwork Fri Nov 22 16:11:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?Q3PDs2vDoXMsIEJlbmNl?= X-Patchwork-Id: 13883344 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 B2088E69173 for ; Fri, 22 Nov 2024 16:18:04 +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=D1Z4az5usI2lY9gqx5SE+mRAc0vY8Gmvq8DnX4tFp+Y=; b=yXc1CibsyhlGO12SVOhvDysEi6 D3rhN1zD/a65+qj3uu+kXl6TpWnC9n1MvcSqr6KV0e2N+5ynwzrqs7o2VmViB0v+PC5rPe8GdmQ71 B8nwUL596FbwL+LqmfT3jz3HBugvaXJKxBh96+Q7VQMn7Egp57fDyE951QkzHw6U7wlUAIgQnMOQe zXGZ+bOpQe4n9L0lk3DdCa9ZKKYIWZSY2qDyToy1Wd+GTC2GveFFxX/tVwx8ey0U0TFi9DnnMiKG+ ccv512U8OYl8TQ/RUpaOf+96ssO1hDRD5E9kTDYkZZmss/CPcIa41CSfVMSf6t/PIlh/DOMwHuXy6 ZPy7FWkw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tEWLx-00000002oX7-47IX; Fri, 22 Nov 2024 16:17:53 +0000 Received: from fw2.prolan.hu ([193.68.50.107]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tEWL1-00000002oGp-0x6c for linux-arm-kernel@lists.infradead.org; Fri, 22 Nov 2024 16:16:56 +0000 Received: from proxmox-mailgw.intranet.prolan.hu (localhost.localdomain [127.0.0.1]) by proxmox-mailgw.intranet.prolan.hu (Proxmox) with ESMTP id CC41AA048D; Fri, 22 Nov 2024 17:16:53 +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=D1Z4az5usI2lY9gqx5SE +mRAc0vY8Gmvq8DnX4tFp+Y=; b=b6llwpk8o9zymmKz3dSyFDTyHSQtqZjS/4pX SWhZxIhoBRRgaumyB37IFn448O0AvrIjfLIsLdYqyeZELNGI/qskEzGRVhEtXynn SlepZitd119v8W4rFL/+yxNw9kOo/yAsOC8mRL7VMeZyjmzhNyKxczgvQbq3XToq 5b9h7jDSG3OQ1CAqYZWrLnhOlj4lFPGoZYhDEzMrf7kX7sD9MVKm7tf/qzB8NVc4 +7UKBR6jVrDOJ+wjFQu4f7xXsq9+LL7r61QsvjEQfDJ5IBPA7i0keqaxDBJttgKc +n1//lR45fR/1oqGwFgvSKoKJ4G3UxivcNbbZVF/PkZ/2P6Y9NAEKQX5HHAkCiw4 xYEIqqS92UsmFKJUXqVz0fHPlmrwyZPC+2S2XXdTw3Ie7QFnnHHAMRF+VoUMhNVf O1IlKwDyvEJc0ETY8JCx1CMjBOIS1NNLQDSJZBsj9Q9Xx31CNKWCmyrXNcm1/Lmk pMCYDbNuhn0YkvxdVle27BVJmeDFZX7e9elZPytUXM4YB9Qrp6l+6UyC87T7bzOG gRbZ0g/V1VS6GGL82WtrwSafEQn9tKZCvF+8d9lUeeD8mRL2CR7wH9+OvO2jrM5B prHYjCoxXJYVGCGG25pv8RMrYmRDtqueaZSJNm9nRKTEMw1YS/c6IGSHL2mMM5aI 4NeIPb0= From: =?utf-8?b?Q3PDs2vDoXMsIEJlbmNl?= To: , , , CC: Mesih Kilinc , Krzysztof Kozlowski , Chen-Yu Tsai , =?utf-8?b?Q3PDs2vDoXMsIEJlbmNl?= , Vinod Koul , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , "Philipp Zabel" Subject: [PATCH v6 2/5] dma-engine: sun4i: Add has_reset option to quirk Date: Fri, 22 Nov 2024 17:11:29 +0100 Message-ID: <20241122161128.2619172-3-csokas.bence@prolan.hu> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241122161128.2619172-1-csokas.bence@prolan.hu> References: <20241122161128.2619172-1-csokas.bence@prolan.hu> MIME-Version: 1.0 X-ESET-AS: R=OK;S=0;OP=CALC;TIME=1732292213;VERSION=7980;MC=2546843321;ID=75609;TRN=0;CRV=0;IPC=;SP=0;SIPS=0;PI=3;F=0 X-ESET-Antispam: OK X-EsetResult: clean, is OK X-EsetId: 37303A29ACD94855607263 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241122_081655_417967_5D4F1683 X-CRM114-Status: GOOD ( 14.50 ) 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() fixes Changes in v4: * Use return value of dev_err_probe() Changes in v5: * More whitespace Changes in v6: * Use the new devm_reset_control_get_exclusive_deasserted() drivers/dma/sun4i-dma.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/dma/sun4i-dma.c b/drivers/dma/sun4i-dma.c index b2c1e4b9f696..adb52a6df83a 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 +1218,13 @@ 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_deasserted(&pdev->dev, NULL); + if (IS_ERR(priv->rst)) + return dev_err_probe(&pdev->dev, PTR_ERR(priv->rst), + "Failed to get reset control\n"); + } + platform_set_drvdata(pdev, priv); spin_lock_init(&priv->lock); @@ -1355,6 +1365,7 @@ 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[] = {