diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-11-06 17:18:42 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-04-04 00:30:21 +0100 |
| commit | 45da7b0451b1fe15e882b08c79be58458cbe7a2f (patch) | |
| tree | 2ab0905104403822ec05c5f402e9e39cb720dd91 /drivers/dma | |
| parent | 59871902703c47acc730555be41bd9cb36d3700c (diff) | |
| download | linux-45da7b0451b1fe15e882b08c79be58458cbe7a2f.tar.gz | |
dmaengine: omap-dma: use cached CCR value when enabling DMA
We don't need to read-modify-write the CCR register; we already know what value it should contain at this point. Use the cached CCR value when setting the enable bit. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/omap-dma.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 49b303296d75..b270aedf1d15 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -181,7 +181,6 @@ static void omap_dma_clear_csr(struct omap_chan *c) static void omap_dma_start(struct omap_chan *c, struct omap_desc *d) { struct omap_dmadev *od = to_omap_dma_dev(c->vc.chan.device); - uint32_t val; if (__dma_omap15xx(od->plat->dma_attr)) c->plat->dma_write(0, CPC, c->dma_ch); @@ -193,9 +192,8 @@ static void omap_dma_start(struct omap_chan *c, struct omap_desc *d) /* Enable interrupts */ c->plat->dma_write(d->cicr, CICR, c->dma_ch); - val = c->plat->dma_read(CCR, c->dma_ch); - val |= CCR_ENABLE; - c->plat->dma_write(val, CCR, c->dma_ch); + /* Enable channel */ + c->plat->dma_write(d->ccr | CCR_ENABLE, CCR, c->dma_ch); } static void omap_dma_stop(struct omap_chan *c) |