mmc: tmio: name 0xd8 as CTL_DMA_ENABLE

This reflects at least the current usage of this register and I think it improves the readability of the code ever so slightly. Cc: Guennadi Liakhovetski <[email protected]> Cc: Magnus Damm <[email protected]> Signed-off-by: Simon Horman <[email protected]> Signed-off-by: Chris Ball <[email protected]>
redpig · Jul 20, 2011 · 95c7348 · 95c7348
1 parent 4c2b8f2
commit 95c7348
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diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
@@ -26,7 +26,7 @@ static void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
 {
 #if defined(CONFIG_SUPERH) || defined(CONFIG_ARCH_SHMOBILE)
 	/* Switch DMA mode on or off - SuperH specific? */
-	writew(enable ? 2 : 0, host->ctl + (0xd8 << host->bus_shift));
+	writew(enable ? 2 : 0, host->ctl + (CTL_DMA_ENABLE << host->bus_shift));
 #endif
 }
 

diff --git a/include/linux/mmc/tmio.h b/include/linux/mmc/tmio.h
@@ -30,6 +30,7 @@
 #define CTL_TRANSACTION_CTL 0x34
 #define CTL_SDIO_STATUS 0x36
 #define CTL_SDIO_IRQ_MASK 0x38
+#define CTL_DMA_ENABLE 0xd8
 #define CTL_RESET_SD 0xe0
 #define CTL_SDIO_REGS 0x100
 #define CTL_CLK_AND_WAIT_CTL 0x138