linux-kernel - [PATCH] dmaengine: pl300: enable the clock to PL330 dma

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Date:	Sun, 3 May 2015 23:28:54 -0500
From:	<dinguyen@...nsource.altera.com>
To:	<dan.j.williams@...el.com>
CC:	<dinh.linux@...il.com>, <vinod.koul@...el.com>,
	<dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Dinh Nguyen <dinguyen@...nsource.altera.com>
Subject: [PATCH] dmaengine: pl300: enable the clock to PL330 dma

From: Dinh Nguyen <dinguyen@...nsource.altera.com>

Turn on the clock to the PL330 DMA if there is a clock node provided.

Signed-off-by: Dinh Nguyen <dinguyen@...nsource.altera.com>
---
 drivers/dma/pl330.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 0e1f567..82eb641 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2894,6 +2894,10 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
 
 	adev->dev.dma_parms = &pl330->dma_parms;
 
+	adev->pclk = devm_clk_get(&adev->dev, "apb_pclk");
+	if (adev->pclk)
+		clk_prepare_enable(adev->pclk);
+
 	/*
 	 * This is the limit for transfers with a buswidth of 1, larger
 	 * buswidths will have larger limits.
-- 
2.2.1

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