[U-Boot] [PATCH] dm: mmc: Add the function for getting current device number

[Jaehoon Chung]

get_mmc_num can be returned 0. Then if you use the "mmcinfo" command, it
can't print the mmc information.
If get_mmc_num is 0, it means that there is not mmc device.
So it added the get_mmc_curr_num() function for getting current device
number(index). And get_mmc_num() is returned the number of device.

This patch is only tested with mmc block..so i didn't touch the
blk-uclass.c.

Signed-off-by: Jaehoon Chung <jh80.chung at samsung.com>
---
 drivers/mmc/mmc-uclass.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 38ced41..a3f2463 100644
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -111,6 +111,16 @@ struct mmc *find_mmc_device(int dev_num)
 
 int get_mmc_num(void)
 {
+	int devnum = blk_find_max_devnum(IF_TYPE_MMC);
+
+	if (devnum < 0)
+		return devnum;
+
+	return devnum + 1;
+}
+
+static int get_mmc_curr_num(void)
+{
 	return max(blk_find_max_devnum(IF_TYPE_MMC), 0);
 }
 
@@ -118,7 +128,7 @@ int mmc_get_next_devnum(void)
 {
 	int ret;
 
-	ret = get_mmc_num();
+	ret = get_mmc_curr_num();
 	if (ret < 0)
 		return ret;
 
-- 
1.9.1