DMA: Rework dw_dmac suspend_late()/resume_early()

This patch reworks platform driver power management code
for dw_dmac from legacy late/early callbacks to dev_pm_ops.

The callbacks are converted for CONFIG_SUSPEND like this:
  suspend_late() -> suspend_noirq()
  resume_early() -> resume_noirq()

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 98c9a84..933c143 100644 (file)
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -1399,8 +1399,9 @@ static void dw_shutdown(struct platform_device *pdev)
        clk_disable(dw->clk);
 }
 
-static int dw_suspend_late(struct platform_device *pdev, pm_message_t mesg)
+static int dw_suspend_noirq(struct device *dev)
 {
+       struct platform_device *pdev = to_platform_device(dev);
        struct dw_dma   *dw = platform_get_drvdata(pdev);
 
        dw_dma_off(platform_get_drvdata(pdev));
@@ -1408,23 +1409,27 @@ static int dw_suspend_late(struct platform_device *pdev, pm_message_t mesg)
        return 0;
 }
 
-static int dw_resume_early(struct platform_device *pdev)
+static int dw_resume_noirq(struct device *dev)
 {
+       struct platform_device *pdev = to_platform_device(dev);
        struct dw_dma   *dw = platform_get_drvdata(pdev);
 
        clk_enable(dw->clk);
        dma_writel(dw, CFG, DW_CFG_DMA_EN);
        return 0;
-
 }
 
+static struct dev_pm_ops dw_dev_pm_ops = {
+       .suspend_noirq = dw_suspend_noirq,
+       .resume_noirq = dw_resume_noirq,
+};
+
 static struct platform_driver dw_driver = {
        .remove         = __exit_p(dw_remove),
        .shutdown       = dw_shutdown,
-       .suspend_late   = dw_suspend_late,
-       .resume_early   = dw_resume_early,
        .driver = {
                .name   = "dw_dmac",
+               .pm     = &dw_dev_pm_ops,
        },
 };