From a7b37f329e5fbeb0f40ef892fc33d1eebfadd7b8 Mon Sep 17 00:00:00 2001 From: Lad Prabhakar Date: Fri, 23 Jan 2026 22:59:55 +0000 Subject: [PATCH] arm64: dts: renesas: r9a09g077m44-rzt2h-evk: Clarify SD0 power jumpers 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 Reviewed-by: Geert Uytterhoeven Link: https://patch.msgid.link/20260123225957.1007089-3-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Geert Uytterhoeven --- arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts index e9639bbb2d703..49464e6d212bc 100644 --- a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts +++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts @@ -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) -- 2.47.3