From nobody Mon Feb 9 08:15:23 2026 Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EC3062F7AC5; Wed, 22 Oct 2025 07:32:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761118337; cv=none; b=TtncAdUXxtttR2YRd+ErpLZ2iYqn9Yz3qJZsp1G6ZnygPdknHLtPpd3TwXRruNMKrhAkbG0Fr0SHIjFvwSLyeHTZrH8IqfmHCNYFE4xcaOZzaK1PO/1HCDvVnOlpGTOoyRC5vVFwKIwzXORGHZ19lW1PBAOJT1j9mV/01UTiPTo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761118337; c=relaxed/simple; bh=fbmpowwIGOGjX7sxBebaPxaQBBqiVGOj37KOsM1rbQM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=lHOESAmnzKepcmEsb1E4WZnPqxXJouEFD6v/2JBY7+GIQZRRBBHpkaAVJEckOx9+zUIoX9kBgTK4Zm/kiA9CjUjsYdWGLWovod5qCVP8OFkAjQM0LIbgkt793SAtErK8nwYLe2wNmbz2chvv/HCz+Imsi2DDgs6xP8sG+irpNV4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com; spf=pass smtp.mailfrom=renesas.com; arc=none smtp.client-ip=210.160.252.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com X-CSE-ConnectionGUID: AAatNDd/SY2pcXBaQXukfA== X-CSE-MsgGUID: 3CGR4ZVXSYWYgIwTHi/CtA== Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 22 Oct 2025 16:32:12 +0900 Received: from demon-pc.localdomain (unknown [10.226.93.88]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 938914012B1A; Wed, 22 Oct 2025 16:32:09 +0900 (JST) From: Cosmin Tanislav To: Cc: Geert Uytterhoeven , Magnus Damm , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Cosmin Tanislav Subject: [PATCH] arm64: dts: renesas: rzt2h/rzn2h-evk: add note about SD1 1.8V modes Date: Wed, 22 Oct 2025 10:31:40 +0300 Message-ID: <20251022073141.1989762-1-cosmin-gabriel.tanislav.xa@renesas.com> X-Mailer: git-send-email 2.51.1.dirty 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" 1.8V operation of SD1 requires the jumper to be placed on the correct pins of a connector on these Evaluation Kits. 1.8V is needed to achieve the higher rated speeds like SDR104. Add a note about it to make sure no one else spends too much time figuring this out. Signed-off-by: Cosmin Tanislav Reviewed-by: Geert Uytterhoeven --- arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts | 3 +++ arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts | 3 +++ 2 files changed, 6 insertions(+) diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts b/arch/= arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts index e94b84393bd9..7269bca8c8cc 100644 --- a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts +++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts @@ -26,6 +26,9 @@ * P17_4 =3D SD1_CD; SW2[3] =3D ON * P08_5 =3D SD1_PWEN; SW2[3] =3D ON * P08_6 =3D SD1_IOVS; SW2[3] =3D ON; SW5[3] =3D OFF; SW5[4] =3D ON + * To enable proper operation in 1.8V modes, CN77 must have pins 2 and 3 + * connected by the jumper. This connects SD1 power-supply control IC outp= ut + * back to VCC1833_7. */ #define SD1_MICRO_SD 1 =20 diff --git a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts b/arch/= arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts index d27da157c6d6..c87cb6510edc 100644 --- a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts +++ b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts @@ -30,6 +30,9 @@ /* * P17_4 =3D SD1_CD; DSW5[3] =3D ON; DSW19[1] =3D OFF; DSW19[2] =3D ON * P08_6 =3D SD1_IOVS; DSW5[3] =3D ON + * To enable proper operation in 1.8V modes, JP21 must have pins 2 and 3 + * connected by the jumper. This connects SD1 power-supply control IC outp= ut + * back to VCC1833_7. */ #define SD1_MICRO_SD 1 =20 --=20 2.51.1.dirty