From patchwork Sat Nov 2 09:31:41 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: 13860058 Received: from fw2.prolan.hu (fw2.prolan.hu [193.68.50.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 76F9F13F435; Sat, 2 Nov 2024 09:35:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.68.50.107 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730540110; cv=none; b=VeNMElg7xpeoD2d8IquclUPf7scy0S3vjcqff21gnPUREEZCpQ3k91hTYTqABYBxWQjXpIH6AjxBsuSVIsLwsj4UbaTCUOpO9ZjMWarWeYNom9iTk+BPGaJSpQto/fe0EtXdL17i18Jz5DYMDFbc2ZvENaDBtXV/q+cgfIAcg8s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730540110; c=relaxed/simple; bh=lb3FdtmXZ529erMSGmzhPSy7EpTjJEz70QHNq9gp5aU=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=iOE/vpN2ZX3F9J4lBzELFHwZ6DrRBVlNdjRkwc6smrOJh2QQZbTVIuQVVFKXyjjASrhkJRRkGo3gFj3OjdQnXT6mtW/loTRw7XVeld3oBgUqb9diGj/VG/aWC0u34jgs3E+O89sIRtgi/R4hldG0CFj2LNGdjtLWVu9aBSoHgQg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=prolan.hu; spf=pass smtp.mailfrom=prolan.hu; dkim=pass (4096-bit key) header.d=prolan.hu header.i=@prolan.hu header.b=hFuR/P6n; arc=none smtp.client-ip=193.68.50.107 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=prolan.hu Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=prolan.hu Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=prolan.hu header.i=@prolan.hu header.b="hFuR/P6n" Received: from proxmox-mailgw.intranet.prolan.hu (localhost.localdomain [127.0.0.1]) by proxmox-mailgw.intranet.prolan.hu (Proxmox) with ESMTP id 04910A0B13; Sat, 2 Nov 2024 10:35:07 +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=3gSDJcJrPViNORmKns1X DDGG2gwhKJjhbhUHWkJaQcU=; b=hFuR/P6nzQgLg4hUe+AJYjbLuRjsNer3j4ep QxET4tCIU4r9mwnRESmmDOicXA4+EI5wTjU7AxagFLNXiaPRPnE3ZtIbcvx5rbX9 2U48YPWrgcZhm5+792LjYUT5pa4uytsTKWF1nAaqwhqOt6xCo56hzbBlB2ACKXGA KvUKdvsZsXHJlRklMgW2p+uoIiwfTo2wIioMjwzJPHr82WpoIHGI9y6S/QeNttGy VSVoOM8Sd9I/xRJSaLhoFJEraUDNwoQH70SDa2cXOcnT3FtixGsZiy5iYTtiLqjo olDASN0fwwJE8t/EfY0H5zeDOm6UPMLlOIKMsHd9HCYdmSt7RMRV/oEJ+Tgs5x4c py2luAwES2OQ2fYhntmAH+pud3lLetHaXbD5dX7qYIzSFaTrtNyGLtECJgMncpyJ xCR3QYCbj8G7X2MpNk61Hn83XAc3BQDJE3UPax4QxqQNqhkBCfOOyHJJc5hXrrbg uL3TDA6cyKc51UrBLx872tY3NhyVbKoxsG7sA9sEDo4OWDVNJkMpDfwYxL9rVUF/ 72N+vybbPONyvExjy0kDpxutziFPCe/kOPSzYeaCz+oZgJW6RLcyVHhxb/9ehFvz SYOAApqFEJBnTJP/daTtKRBrjD/ViyasAXcq6C4OtLktxCQzT38mbHBXWGWxJxOZ ZFO9n1g= From: =?utf-8?b?Q3PDs2vDoXMsIEJlbmNl?= To: , , , CC: Mesih Kilinc , Krzysztof Kozlowski , =?utf-8?b?Q3PDs2vDoXMsIEJlbmNl?= , Vinod Koul , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Philipp Zabel Subject: [PATCH v5 2/5] dma-engine: sun4i: Add has_reset option to quirk Date: Sat, 2 Nov 2024 10:31:41 +0100 Message-ID: <20241102093140.2625230-3-csokas.bence@prolan.hu> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241102093140.2625230-1-csokas.bence@prolan.hu> References: <20241102093140.2625230-1-csokas.bence@prolan.hu> Precedence: bulk X-Mailing-List: dmaengine@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ESET-AS: R=OK;S=0;OP=CALC;TIME=1730540106;VERSION=7979;MC=3604976308;ID=220019;TRN=0;CRV=0;IPC=;SP=0;SIPS=0;PI=3;F=0 X-ESET-Antispam: OK X-EsetResult: clean, is OK X-EsetId: 37303A2980D94855667067 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 drivers/dma/sun4i-dma.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/dma/sun4i-dma.c b/drivers/dma/sun4i-dma.c index b2c1e4b9f696..9d1e3c51342d 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(&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); @@ -1287,6 +1297,14 @@ 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 @@ -1355,6 +1373,7 @@ 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[] = {