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dma: mmp_pdma: factor out DRCMR register calculation

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The exact same calculation is done twice, so let's factor it out to a
macro.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Daniel Mack 2013-08-10 18:52:15 +02:00 committed by Vinod Koul
parent aab81e47f5
commit 8b298ded90
1 changed files with 4 additions and 4 deletions
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8
drivers/dma/mmp_pdma.c
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@ -47,6 +47,8 @@
#define DCSR_CMPST (1 << 10) /* The Descriptor Compare Status */
#define DCSR_EORINTR (1 << 9) /* The end of Receive */
#define DRCMR(n) ((((n) < 64) ? 0x0100 : 0x1100) + \
(((n) & 0x3f) << 2))
#define DRCMR_MAPVLD (1 << 7) /* Map Valid (read / write) */
#define DRCMR_CHLNUM 0x1f /* mask for Channel Number (read / write) */
@ -143,8 +145,7 @@ static void enable_chan(struct mmp_pdma_phy *phy)
if (!phy->vchan)
return;
reg = phy->vchan->drcmr;
reg = (((reg) < 64) ? 0x0100 : 0x1100) + (((reg) & 0x3f) << 2);
reg = DRCMR(phy->vchan->drcmr);
writel(DRCMR_MAPVLD | phy->idx, phy->base + reg);
reg = (phy->idx << 2) + DCSR;
@ -258,8 +259,7 @@ static void mmp_pdma_free_phy(struct mmp_pdma_chan *pchan)
return;
/* clear the channel mapping in DRCMR */
reg = pchan->phy->vchan->drcmr;
reg = ((reg < 64) ? 0x0100 : 0x1100) + ((reg & 0x3f) << 2);
reg = DRCMR(pchan->phy->vchan->drcmr);
writel(0, pchan->phy->base + reg);
spin_lock_irqsave(&pdev->phy_lock, flags);