[PATCH V2 08/20] dmaengine/amba-pl08x: support runtime PM
From: Viresh Kumar <hidden>
Date: 2011-08-01 09:39:49
Also in:
lkml
Subsystem:
dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
Insert notifiers for the runtime PM API. With this the runtime PM layer kicks in to action where used. This will also handle enabling/disabling of interface clock (Code will be added in amba/bus.c by Russell King). Signed-off-by: Viresh Kumar <redacted> --- drivers/dma/amba-pl08x.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 3fbaf0e..428a67b 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>
@@ -879,11 +880,19 @@ static void pl08x_free_txd_list(struct pl08x_driver_data *pl08x, */ static int pl08x_alloc_chan_resources(struct dma_chan *chan) { + struct pl08x_dma_chan *plchan = to_pl08x_chan(chan); + struct pl08x_driver_data *pl08x = plchan->host; + + pm_runtime_resume(&pl08x->adev->dev); return 0; } static void pl08x_free_chan_resources(struct dma_chan *chan) { + struct pl08x_dma_chan *plchan = to_pl08x_chan(chan); + struct pl08x_driver_data *pl08x = plchan->host; + + pm_runtime_suspend(&pl08x->adev->dev); } /*
@@ -1993,6 +2002,8 @@ 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_suspend(&adev->dev); return 0; out_no_slave_reg:
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1.7.2.2