linux-kernel - [PATCH v8 04/16] dmaengine: dw-axi-dmac: Add device

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Date:   Tue, 29 Dec 2020 12:47:01 +0800
From:   Sia Jee Heng <jee.heng.sia@...el.com>
To:     vkoul@...nel.org, Eugeniy.Paltsev@...opsys.com, robh+dt@...nel.org
Cc:     andriy.shevchenko@...ux.intel.com, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: [PATCH v8 04/16] dmaengine: dw-axi-dmac: Add device_synchronize() callback

Add support for device_synchronize() callback function to sync with
dmaengine_terminate_sync().

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Sia Jee Heng <jee.heng.sia@...el.com>
---
 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index 3737e1c3c793..241ab7a24e2a 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -347,6 +347,13 @@ static void dma_chan_issue_pending(struct dma_chan *dchan)
 	spin_unlock_irqrestore(&chan->vc.lock, flags);
 }
 
+static void dw_axi_dma_synchronize(struct dma_chan *dchan)
+{
+	struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan);
+
+	vchan_synchronize(&chan->vc);
+}
+
 static int dma_chan_alloc_chan_resources(struct dma_chan *dchan)
 {
 	struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan);
@@ -940,6 +947,7 @@ static int dw_probe(struct platform_device *pdev)
 	dw->dma.device_free_chan_resources = dma_chan_free_chan_resources;
 
 	dw->dma.device_prep_dma_memcpy = dma_chan_prep_dma_memcpy;
+	dw->dma.device_synchronize = dw_axi_dma_synchronize;
 
 	platform_set_drvdata(pdev, chip);
 
-- 
2.18.0