dmaengine: at_hdmac: prepare clk before calling enable

Replace clk_enable/disable with clk_prepare_enable/disable_unprepare to
avoid common clk framework warnings.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
[nicolas.ferre@atmel.com: remove return code checking in at_dma_resume_noirq()]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 9 insertions, 6 deletions

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 3e070d2fb6a3..c787f38a186a 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -1460,7 +1460,9 @@ static int __init at_dma_probe(struct platform_device *pdev)
                 err = PTR_ERR(atdma->clk);
                 goto err_clk;
         }
-        clk_enable(atdma->clk);
+        err = clk_prepare_enable(atdma->clk);
+        if (err)
+                goto err_clk_prepare;
 
         /* force dma off, just in case */
         at_dma_off(atdma);
@@ -1560,7 +1562,8 @@ err_of_dma_controller_register:
 err_pool_create:
         free_irq(platform_get_irq(pdev, 0), atdma);
 err_irq:
-        clk_disable(atdma->clk);
+        clk_disable_unprepare(atdma->clk);
+err_clk_prepare:
         clk_put(atdma->clk);
 err_clk:
         iounmap(atdma->regs);
@@ -1596,7 +1599,7 @@ static int at_dma_remove(struct platform_device *pdev)
                 list_del(&chan->device_node);
         }
 
-        clk_disable(atdma->clk);
+        clk_disable_unprepare(atdma->clk);
         clk_put(atdma->clk);
 
         iounmap(atdma->regs);
@@ -1615,7 +1618,7 @@ static void at_dma_shutdown(struct platform_device *pdev)
         struct at_dma   *atdma = platform_get_drvdata(pdev);
 
         at_dma_off(platform_get_drvdata(pdev));
-        clk_disable(atdma->clk);
+        clk_disable_unprepare(atdma->clk);
 }
 
 static int at_dma_prepare(struct device *dev)
@@ -1672,7 +1675,7 @@ static int at_dma_suspend_noirq(struct device *dev)
 
         /* disable DMA controller */
         at_dma_off(atdma);
-        clk_disable(atdma->clk);
+        clk_disable_unprepare(atdma->clk);
         return 0;
 }
 
@@ -1702,7 +1705,7 @@ static int at_dma_resume_noirq(struct device *dev)
         struct dma_chan *chan, *_chan;
 
         /* bring back DMA controller */
-        clk_enable(atdma->clk);
+        clk_prepare_enable(atdma->clk);
         dma_writel(atdma, EN, AT_DMA_ENABLE);
 
         /* clear any pending interrupt */