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@xxxxxx>
---
arch/arm/mach-omap2/mcbsp.c | 5 +++--
arch/arm/plat-omap/include/plat/mcbsp.h | 1 -
arch/arm/plat-omap/mcbsp.c | 23 ++++++-----------------
3 files changed, 9 insertions(+), 20 deletions(-)
diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c
index 40d8f93..284c34e 100644
--- a/arch/arm/mach-omap2/mcbsp.c
+++ b/arch/arm/mach-omap2/mcbsp.c
@@ -23,6 +23,7 @@
#include <plat/cpu.h>
#include <plat/mcbsp.h>
#include <plat/omap_device.h>
+#include <linux/pm_runtime.h>
#include "control.h"
@@ -86,7 +87,7 @@ int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
return -EINVAL;
}
- clk_disable(mcbsp->fclk);
+ pm_runtime_put_sync(mcbsp->dev);
r = clk_set_parent(mcbsp->fclk, fck_src);
if (IS_ERR_VALUE(r)) {
@@ -96,7 +97,7 @@ int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
return -EINVAL;
}
- clk_enable(mcbsp->fclk);
+ pm_runtime_get_sync(mcbsp->dev);
clk_put(fck_src);
diff --git a/arch/arm/plat-omap/include/plat/mcbsp.h b/arch/arm/plat-omap/include/plat/mcbsp.h
index d8275f7..a2bd268 100644
--- a/arch/arm/plat-omap/include/plat/mcbsp.h
+++ b/arch/arm/plat-omap/include/plat/mcbsp.h
@@ -477,7 +477,6 @@ struct omap_mcbsp {
/* Protect the field .free, while checking if the mcbsp is in use */
spinlock_t lock;
struct omap_mcbsp_platform_data *pdata;
- struct clk *iclk;
struct clk *fclk;
#ifdef CONFIG_ARCH_OMAP3
struct omap_mcbsp_st_data *st_data;
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
index 9a0f76a..ac332ab 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>
#include "../mach-omap2/cm-regbits-34xx.h"
@@ -764,8 +765,7 @@ 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);
@@ -813,8 +813,7 @@ 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;
@@ -844,8 +843,7 @@ 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 */
@@ -1858,32 +1856,24 @@ 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:
@@ -1906,7 +1896,6 @@ 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);
--
1.7.0.4
--
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