linux-kernel - [PATCH 02/07] dma: rework dw_dmac suspend_late()/resume

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Date:	Wed, 24 Jun 2009 18:23:24 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	gregkh@...e.de, pavel@....cz, hskinnemoen@...el.com,
	anemo@....ocn.ne.jp, linux-usb@...r.kernel.org,
	Magnus Damm <magnus.damm@...il.com>, rjw@...k.pl,
	stern@...land.harvard.edu, ben-linux@...ff.org,
	linux-pm@...ts.linux-foundation.org, linux-omap@...r.kernel.org,
	akpm@...ux-foundation.org, felipe.balbi@...ia.com
Subject: [PATCH 02/07] dma: rework dw_dmac suspend_late()/resume_early()

From: Magnus Damm <damm@...l.co.jp>

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@...l.co.jp>
---

 Untested and not test compiled due to lack of cross compiler.

 drivers/dma/dw_dmac.c |   15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

--- 0001/drivers/dma/dw_dmac.c
+++ work/drivers/dma/dw_dmac.c	2009-06-01 16:31:34.000000000 +0900
@@ -1399,8 +1399,9 @@ static void dw_shutdown(struct platform_
 	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 platfo
 	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,
 	},
 };
 
--
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