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Commit b7b6018b authored by Viresh Kumar's avatar Viresh Kumar Committed by Vinod Koul
Browse files

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: default avatarViresh Kumar <viresh.kumar@st.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 175a5e61

drivers/dma/amba-pl08x.c

+12 −0
Original line number Diff line number Diff line
@@ -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 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id) 
	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);