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arm64: dts: renesas: r9a09g077m44-rzt2h-evk: Clarify SD0 power jumpers

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Clarify the board setup requirements for using SDHI0 on the RZ/T2H EVK by
documenting the CN78 jumper positions needed to supply SD0 power for
either the default eMMC configuration or the SD card slot configuration.

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/20260123225957.1007089-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Lad Prabhakar
2026-01-23 22:59:55 +00:00
committed by Geert Uytterhoeven
parent 0928a28daf
commit a7b37f329e
1 changed files with 6 additions and 3 deletions
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9
arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
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@@ -14,12 +14,15 @@
/*
* SD0 can be connected to either eMMC (IC49) or SD card slot CN31
* Lets by default enable the eMMC, note we need the below SW settings
* for eMMC.
* for eMMC. Also ensure that CN78 pins 5 and 6 are connected with a jumper
* to provide the SD0 power supply when using eMMC.
* SW2[1] = ON; SW2[2] = ON
*
* To enable SD card and disable eMMC on SDHI0 disable the below macro
* and set the below switch setting:
* SW2[1] = OFF; SW2[2] = ON
* and set the switch as follows. Also ensure that CN78 pins 3 and 4 are connected
* with a jumper to provide the SD0 power supply when using an SD card.
*
* SW2[1] = OFF; SW2[2] = ON.
*/
#define SD0_EMMC 1
#define SD0_SD (!SD0_EMMC)