@@ -35,6 +35,7 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/delay.h>
+#include <linux/pm_runtime.h>
#include <asm/system.h>
#include <mach/hardware.h>
@@ -330,6 +331,8 @@ int omap_request_dma(int dev_id, const char *dev_name,
chan = dma_chan + free_ch;
chan->dev_id = dev_id;
+ pm_runtime_get(&pd->dev);
+
if (d->dev_caps & IS_WORD_16)
p->clear_lch_regs(free_ch);
else
@@ -415,6 +418,7 @@ void omap_free_dma(int lch)
omap_clear_dma(lch);
p->clear_dma_sglist_mode(lch);
}
+ pm_runtime_put(&pd->dev);
spin_lock_irqsave(&dma_chan_lock, flags);
dma_chan[lch].dev_id = -1;
dma_chan[lch].next_lch = -1;
@@ -782,6 +786,11 @@ static int __devinit omap_system_dma_probe(struct platform_device *pdev)
dma_chan_count = d->chan_count;
dma_chan = d->chan;
+ /* Enable run time PM */
+ pm_runtime_enable(&pd->dev);
+
+ /* Accessing hw registers, get clock */
+ pm_runtime_get(&pd->dev);
for (ch = 0; ch < dma_chan_count; ch++) {
unsigned long flags;
omap_clear_dma(ch);
@@ -809,6 +818,10 @@ static int __devinit omap_system_dma_probe(struct platform_device *pdev)
dma_chan[0].dev_id = 0;
dma_chan[1].dev_id = 1;
}
+
+ if (!omap_dma_reserve_channels)
+ pm_runtime_put(&pd->dev);
+
return 0;
exit_release_region: