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?Q3PDs2vDoXMgQmVuY2U=?= X-Patchwork-Id: 13860065 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 42DFDE677F8 for ; Sat, 2 Nov 2024 09:38:00 +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=3gSDJcJrPViNORmKns1XDDGG2gwhKJjhbhUHWkJaQcU=; b=yj8CbsV3eJzlu3rWvO5Xax0q8A Pp2DXZ2cxtUw8ZKR8iOmT2dnZEpdzH5WyV77pq9MR96QoHSBmNSH8/rGpHAt2eV7QThJCCAFGgEsv t8DqfP4pthkExHbWf+2gONmTQyMBb1Wz05M7loT0pRx7ZwGIrIvMmknehkOq9b0N/u+u8Vze9NbIt UmjVCc1ZNoly2V3jeJrDNAy1rKK7wSKVADEoA4Fvu/3PsmcTlBcI0Ye9GfK3xnOKTGBSEv223TgmK DluzeYQdPs9z3YYTxQiVoAN/Rzcm+6p6Gc4lse8Effc8Kjkuef/kUxB3hhByA88tDjbhlvhL4i9IH 1sk/CPqA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t7AZq-00000009P4A-2zTl; Sat, 02 Nov 2024 09:37:50 +0000 Received: from fw2.prolan.hu ([193.68.50.107]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t7AXE-00000009OZU-1ZFW for linux-arm-kernel@lists.infradead.org; Sat, 02 Nov 2024 09:35:09 +0000 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> 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241102_023508_598696_0F735EFF X-CRM114-Status: GOOD ( 15.90 ) 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 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[] = {