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Fri, 23 Jan 2026 15:00:24 -0800 (PST) From: Prabhakar X-Google-Original-From: Prabhakar To: Geert Uytterhoeven , Magnus Damm , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-renesas-soc@vger.kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Fabrizio Castro , Lad Prabhakar Subject: [PATCH 2/4] arm64: dts: renesas: r9a09g077m44-rzt2h-evk: Clarify SD0 power jumpers Date: Fri, 23 Jan 2026 22:59:55 +0000 Message-ID: <20260123225957.1007089-3-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260123225957.1007089-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20260123225957.1007089-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Lad Prabhakar 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 --- 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 e9639bbb2d70..49464e6d212b 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] =3D ON; SW2[2] =3D ON * * To enable SD card and disable eMMC on SDHI0 disable the below macro - * and set the below switch setting: - * SW2[1] =3D OFF; SW2[2] =3D ON + * and set the switch as follows. Also ensure that CN78 pins 3 and 4 are c= onnected + * with a jumper to provide the SD0 power supply when using an SD card. + * + * SW2[1] =3D OFF; SW2[2] =3D ON. */ #define SD0_EMMC 1 #define SD0_SD (!SD0_EMMC) --=20 2.52.0