OMAP: McBSP: Add pm runtime support

Add pm runtime support for McBSP driver.
Reference to fclk is not removed because it is required when the
functional clock is switched from one source to another.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 6 insertions, 17 deletions

diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
index 67ec74ea253..6d230164b4f 100644
--- a/arch/arm/plat-omap/mcbsp.c
+++ b/arch/arm/plat-omap/mcbsp.c
@@ -28,6 +28,7 @@
 #include <plat/dma.h>
 #include <plat/mcbsp.h>
 #include <plat/omap_device.h>
+#include <linux/pm_runtime.h>
 
 /* XXX These "sideways" includes are a sign that something is wrong */
 #include "../mach-omap2/cm2xxx_3xxx.h"
@@ -757,8 +758,7 @@ int omap_mcbsp_request(unsigned int id)
 	if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->request)
 		mcbsp->pdata->ops->request(id);
 
-	clk_enable(mcbsp->iclk);
-	clk_enable(mcbsp->fclk);
+	pm_runtime_get_sync(mcbsp->dev);
 
 	/* Do procedure specific to omap34xx arch, if applicable */
 	omap34xx_mcbsp_request(mcbsp);
@@ -806,8 +806,7 @@ err_clk_disable:
 	/* Do procedure specific to omap34xx arch, if applicable */
 	omap34xx_mcbsp_free(mcbsp);
 
-	clk_disable(mcbsp->fclk);
-	clk_disable(mcbsp->iclk);
+	pm_runtime_put_sync(mcbsp->dev);
 
 	spin_lock(&mcbsp->lock);
 	mcbsp->free = true;
@@ -837,8 +836,7 @@ void omap_mcbsp_free(unsigned int id)
 	/* Do procedure specific to omap34xx arch, if applicable */
 	omap34xx_mcbsp_free(mcbsp);
 
-	clk_disable(mcbsp->fclk);
-	clk_disable(mcbsp->iclk);
+	pm_runtime_put_sync(mcbsp->dev);
 
 	if (mcbsp->io_type == OMAP_MCBSP_IRQ_IO) {
 		/* Free IRQs */
@@ -1827,32 +1825,24 @@ static int __devinit omap_mcbsp_probe(struct platform_device *pdev)
 	}
 	mcbsp->dma_tx_sync = res->start;
 
-	mcbsp->iclk = clk_get(&pdev->dev, "ick");
-	if (IS_ERR(mcbsp->iclk)) {
-		ret = PTR_ERR(mcbsp->iclk);
-		dev_err(&pdev->dev, "unable to get ick: %d\n", ret);
-		goto err_res;
-	}
-
 	mcbsp->fclk = clk_get(&pdev->dev, "fck");
 	if (IS_ERR(mcbsp->fclk)) {
 		ret = PTR_ERR(mcbsp->fclk);
 		dev_err(&pdev->dev, "unable to get fck: %d\n", ret);
-		goto err_fclk;
+		goto err_res;
 	}
 
 	mcbsp->pdata = pdata;
 	mcbsp->dev = &pdev->dev;
 	mcbsp_ptr[id] = mcbsp;
 	platform_set_drvdata(pdev, mcbsp);
+	pm_runtime_enable(mcbsp->dev);
 
 	/* Initialize mcbsp properties for OMAP34XX if needed / applicable */
 	omap34xx_device_init(mcbsp);
 
 	return 0;
 
-err_fclk:
-	clk_put(mcbsp->iclk);
 err_res:
 	iounmap(mcbsp->io_base);
 err_ioremap:
@@ -1875,7 +1865,6 @@ static int __devexit omap_mcbsp_remove(struct platform_device *pdev)
 		omap34xx_device_exit(mcbsp);
 
 		clk_put(mcbsp->fclk);
-		clk_put(mcbsp->iclk);
 
 		iounmap(mcbsp->io_base);
 		kfree(mcbsp);