s5pc110: mmc: add comment in mmc_prepare_data()

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/drivers/mmc/s5pc1xx_mmc.c b/drivers/mmc/s5pc1xx_mmc.c
index a183f4c..4fc198a 100644 (file)
--- a/drivers/mmc/s5pc1xx_mmc.c
+++ b/drivers/mmc/s5pc1xx_mmc.c
@@ -49,12 +49,22 @@ static void mmc_prepare_data(struct mmc_host *host, struct mmc_data *data)
 
        writeb(0xe, &host->reg->timeoutcon);    /* TMCLK * 2^27 */
 
+       /*
+        * NORMAL Interrupt Status Enable Register init
+        * [5] ENSTABUFRDRDY : Buffer Read Ready Status Enable
+        * [4] ENSTABUFWTRDY : Buffer write Ready Status Enable
+        * [1] ENSTASTANSCMPLT : Transfre Complete Status Enable
+        * [0] ENSTACMDCMPLT : Command Complete Status Enable
+       */
        mask = readl(&host->reg->norintstsen);
        mask &= ~(0xffff);
        mask |= (1 << 5) | (1 << 4) | (1 << 1) | (1 << 0);
        writel(mask, &host->reg->norintstsen);
 
-
+       /*
+        * NORMAL Interrupt Signal Enable Register init
+        * [1] ENSTACMDCMPLT : Transfer Complete Signal Enable
+        */
        mask = readl(&host->reg->norintsigen);
        mask &= ~(0xffff);
        mask |= (1 << 1);