arm64: dts: renesas: r9a09g087m44-rzn2h-evk: Clarify SD0 power jumper setup

Document the required JP23 jumper positions for supplying SD0 when
selecting between the onboard eMMC and the SD card slot.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260123225957.1007089-4-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
index 19f0a2c06753065c7fcafcb7aceb5a23f871f843..4c0fe5c7e8aaeb42d83b970229425eeb193a4b40 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
@@ -14,12 +14,14 @@
 /*
  * SD0 can be connected to either eMMC (U33) or SD card slot CN21
  * Lets by default enable the eMMC, note we need the below SW settings
- * for eMMC.
+ * for eMMC. Also ensure that JP23 pins 5 and 6 are connected with a jumper
+ * to provide the SD0 power supply when using eMMC.
  * DSW5[1] = ON; DSW5[2] = ON
  * DSW17[5] = OFF; DSW17[6] = ON
  *
  * To enable SD card and disable eMMC on SDHI0 disable the below macro
- * and set the below switch setting:
+ * and set the below switch settings. Also ensure that JP23 pins 3 and 4 are
+ * connected with a jumper to provide the SD0 power supply when using an SD card.
  * DSW5[1] = OFF; DSW5[2] = ON
  * P22_6 = SD0_WP; DSW15[1] = OFF; DSW15[2] = ON
  * P22_5 = SD0_CD; DSW15[3] = OFF; DSW15[4] = ON