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authorViresh Kumar <viresh.kumar@st.com>2011-08-05 15:32:33 +0530
committerVinod Koul <vinod.koul@intel.com>2011-08-25 19:33:38 +0530
commitb7b6018bad6fd7ebe5a78bda5f2a71a6ecf5406a (patch)
tree652c64fd26877df5f5257540aa257e0f64459b23 /drivers/dma
parent175a5e617cd820d9e22d9e4f6d3ef736b2f874b1 (diff)
downloadblackbird-op-linux-b7b6018bad6fd7ebe5a78bda5f2a71a6ecf5406a.tar.gz
blackbird-op-linux-b7b6018bad6fd7ebe5a78bda5f2a71a6ecf5406a.zip
dmaengine/amba-pl08x: support runtime PM
Insert notifiers for the runtime PM API. With this the runtime PM layer kicks in to action where used. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/amba-pl08x.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index ead88c9a5e93..5dd97f450925 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -84,6 +84,7 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
+#include <linux/pm_runtime.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <asm/hardware/pl080.h>
@@ -405,6 +406,7 @@ pl08x_get_phy_channel(struct pl08x_driver_data *pl08x,
return NULL;
}
+ pm_runtime_get_sync(&pl08x->adev->dev);
return ch;
}
@@ -418,6 +420,8 @@ static inline void pl08x_put_phy_channel(struct pl08x_driver_data *pl08x,
/* Stop the channel and clear its interrupts */
pl08x_terminate_phy_chan(pl08x, ch);
+ pm_runtime_put(&pl08x->adev->dev);
+
/* Mark it as free */
ch->serving = NULL;
spin_unlock_irqrestore(&ch->lock, flags);
@@ -1855,6 +1859,9 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
goto out_no_pl08x;
}
+ pm_runtime_set_active(&adev->dev);
+ pm_runtime_enable(&adev->dev);
+
/* Initialize memcpy engine */
dma_cap_set(DMA_MEMCPY, pl08x->memcpy.cap_mask);
pl08x->memcpy.dev = &adev->dev;
@@ -1992,6 +1999,8 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
dev_info(&pl08x->adev->dev, "DMA: PL%03x rev%u at 0x%08llx irq %d\n",
amba_part(adev), amba_rev(adev),
(unsigned long long)adev->res.start, adev->irq[0]);
+
+ pm_runtime_put(&adev->dev);
return 0;
out_no_slave_reg:
@@ -2010,6 +2019,9 @@ out_no_ioremap:
dma_pool_destroy(pl08x->pool);
out_no_lli_pool:
out_no_platdata:
+ pm_runtime_put(&adev->dev);
+ pm_runtime_disable(&adev->dev);
+
kfree(pl08x);
out_no_pl08x:
amba_release_regions(adev);
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