MLK-11326 dma: mxs-dma: remove the runtime pm dummy code

Currently, the dma engine driver don't support runtime pm,
and it is not necessary to support the feature since it support
slave sg and cyclic mode, and clock enable/disable during dma
chans allocate and release.

The patch remove the runtime pm dummy code.

Signed-off-by: Fugang Duan <B38611@freescale.com>
(cherry picked from commit: 2c8f8e3e6a21184e6cf8b8e5ba3ec8e76794c951)

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 5b2139f..0e90c17 100644 (file)
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -28,7 +28,6 @@
 #include <linux/of_device.h>
 #include <linux/of_dma.h>
 #include <linux/list.h>
-#include <linux/pm_runtime.h>
 #include <asm/irq.h>
 
 #include "dmaengine.h"
@@ -909,39 +908,6 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
        return 0;
 }
 
-static int mxs_dma_runtime_suspend(struct device *dev)
-{
-       struct mxs_dma_engine *mxs_dma = dev_get_drvdata(dev);
-
-       if (mxs_dma->dev_id == IMX7D_DMA)
-               clk_disable(mxs_dma->clk_io);
-
-       clk_disable(mxs_dma->clk);
-       return 0;
-}
-
-static int mxs_dma_runtime_resume(struct device *dev)
-{
-       struct mxs_dma_engine *mxs_dma = dev_get_drvdata(dev);
-       int ret;
-
-       ret = clk_enable(mxs_dma->clk);
-       if (ret < 0)
-               goto err_out;
-
-       if (mxs_dma->dev_id == IMX7D_DMA) {
-               ret = clk_enable(mxs_dma->clk_io);
-               if (ret < 0)
-                       goto err_out;
-       }
-
-       return 0;
-
-err_out:
-       dev_err(dev, "clk_enable failed: %d\n", ret);
-       return ret;
-}
-
 static int mxs_dma_pm_suspend(struct device *dev)
 {
        /*
@@ -963,7 +929,6 @@ static int mxs_dma_pm_resume(struct device *dev)
 }
 
 static const struct dev_pm_ops mxs_dma_pm_ops = {
-       SET_RUNTIME_PM_OPS(mxs_dma_runtime_suspend, mxs_dma_runtime_resume, NULL)
        SET_SYSTEM_SLEEP_PM_OPS(mxs_dma_pm_suspend, mxs_dma_pm_resume)
 };