From mboxrd@z Thu Jan 1 00:00:00 1970 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 2ED39CA0EE4 for ; Sat, 23 Aug 2025 16:24:33 +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: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=r8VX6q4SLW6XTQ4SBgLqTZXOM7mhPBvjlSBRKSc2NaI=; b=IGN82em1M+Zvay/cIhdITmFKmQ Kvn2RDAriSeLGzZWiY+O5O789YeQssZOmQeXQGRrJzbEQGBBTGRHzbnCK8GQlG1twAGZS+S2tVRTx Afk5lVTcUorhuLWdSH02nbvE/g2qHRW3DGNW9gFQZqo+pV8QRa6JwVX+IJDfZ3VMfpsB6dKA90et5 tnEx8cB4d7s/QMFLUcBZE8UEZMwbwIHCBKzZFfTHDc6uhjmRtTxHY8fpnt/hXSFuaTSTppJGwmEO/ xSAYF4xBTuPyHzcLpGrijRjYBMwspV+ygglo5h/WJwAWkYBHbEfkY5pD+0ah1Ri2neqLoBgAfrn87 pGswmB7Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1upr2b-000000051lb-0N2T; Sat, 23 Aug 2025 16:24:29 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1upqcw-00000004wzY-1pkv for linux-arm-kernel@lists.infradead.org; Sat, 23 Aug 2025 15:57:59 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id F0D125C4573; Sat, 23 Aug 2025 15:57:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AD23BC116B1; Sat, 23 Aug 2025 15:57:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755964677; bh=pVQUvqJRO5H4sWHsAkGOHbGYc59txE4I2DP6q9gpHjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KAgudiOBs/ydEz7Y58Rut0JazrdH1up7gt3gCUfUXKuw+UnVYsonvPtJg3vchhnM7 kOfA9WWGjieQlf68ZZs7oj6+fL9R9SZOVUssw6YaLnKJrMgiy1D6wRHzp53xyUUk7g r3bbW89sWFMnv7ct8puViNlM/ZeSTPlkS0BHydhJCZPtUo2JuE+kbO0GCXNDZ3ieds jFXzWZSFHnJ+YP72rg4kENj7myFu8IkVw91IiTW0OVtXpKp9l4PWy2EULSjoy7bZXu 7evyz9/jIoOtmeEcqcbkMNNbuUD5LJAeic3whvG1tiGEQ/Ju93efldoTWG0sEygFl8 cDEGXocRB0zXQ== From: Jisheng Zhang To: Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Robin Murphy Cc: dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 09/14] dmaengine: dma350: Support dma-channel-mask Date: Sat, 23 Aug 2025 23:40:04 +0800 Message-ID: <20250823154009.25992-10-jszhang@kernel.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250823154009.25992-1-jszhang@kernel.org> References: <20250823154009.25992-1-jszhang@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250823_085758_514143_FD18D964 X-CRM114-Status: GOOD ( 13.29 ) 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 Not all channels are available to kernel, we need to support dma-channel-mask. Signed-off-by: Jisheng Zhang --- drivers/dma/arm-dma350.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/dma/arm-dma350.c b/drivers/dma/arm-dma350.c index 6a6d1c2a3ee6..72067518799e 100644 --- a/drivers/dma/arm-dma350.c +++ b/drivers/dma/arm-dma350.c @@ -534,7 +534,7 @@ static int d350_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct d350 *dmac; void __iomem *base; - u32 reg; + u32 reg, dma_chan_mask; int ret, nchan, dw, aw, r, p; bool coherent, memset; @@ -563,6 +563,15 @@ static int d350_probe(struct platform_device *pdev) dmac->nchan = nchan; + /* Enable all channels by default */ + dma_chan_mask = nchan - 1; + + ret = of_property_read_u32(dev->of_node, "dma-channel-mask", &dma_chan_mask); + if (ret < 0 && (ret != -EINVAL)) { + dev_err(&pdev->dev, "dma-channel-mask is not complete.\n"); + return ret; + } + reg = readl_relaxed(base + DMAINFO + DMA_BUILDCFG1); dmac->nreq = FIELD_GET(DMA_CFG_NUM_TRIGGER_IN, reg); @@ -592,6 +601,11 @@ static int d350_probe(struct platform_device *pdev) memset = true; for (int i = 0; i < nchan; i++) { struct d350_chan *dch = &dmac->channels[i]; + char ch_irqname[8]; + + /* skip for reserved channels */ + if (!test_bit(i, (unsigned long *)&dma_chan_mask)) + continue; dch->coherent = coherent; dch->base = base + DMACH(i); @@ -602,7 +616,9 @@ static int d350_probe(struct platform_device *pdev) dev_warn(dev, "No command link support on channel %d\n", i); continue; } - dch->irq = platform_get_irq(pdev, i); + + snprintf(ch_irqname, sizeof(ch_irqname), "ch%d", i); + dch->irq = platform_get_irq_byname(pdev, ch_irqname); if (dch->irq < 0) return dch->irq; -- 2.50.0