ARM: mach-shmobile: ap4evb: update MMC/SHDI tiny document
MMC0/SDHI1 (CN7) can be selected by dip switch.
And card voltage can be selected by jumper pin.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 67da737..2963a11 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -128,15 +128,21 @@
*/
/*
- * MMC (CN7)
+ * MMC0/SDHI1 (CN7)
*
- * J22 : 1-2: 1.8v for MMC
- * 2-3: 3.3v for MMC
- * SW1 : OFF
- * SW33: bit1: OFF
- * bit2: ON
- * bit3: ON
- * bit4: X
+ * J22 : select card voltage
+ * 1-2 pin : 1.8v
+ * 2-3 pin : 3.3v
+ *
+ * SW1 | SW33
+ * | bit1 | bit2 | bit3 | bit4
+ * ------------+------+------+------+-------
+ * MMC0 OFF | OFF | ON | ON | X
+ * SDHI1 OFF | ON | X | OFF | ON
+ *
+ * voltage lebel
+ * CN7 : 1.8v
+ * CN12: 3.3v
*/
/* MTD */