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authorKishon Vijay Abraham I <kishon@ti.com>2011-02-24 15:16:54 +0530
committerTony Lindgren <tony@atomide.com>2011-02-24 13:03:33 -0800
commite95496d4acadd0b72c4947be61e8d44700fdaae7 (patch)
tree61d9a72d7a1e20ad373858f725f8aaf5472ce6e6 /arch/arm/plat-omap/mcbsp.c
parentf36d01d64f1caf0545214a5dc14096477f68cfbe (diff)
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>
Diffstat (limited to 'arch/arm/plat-omap/mcbsp.c')
-rw-r--r--arch/arm/plat-omap/mcbsp.c23
1 files changed, 6 insertions, 17 deletions
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
index 67ec74ea2532..6d230164b4f9 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);