From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE6362E719B for ; Fri, 16 Jan 2026 16:08:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768579741; cv=none; b=I65+OEbzq8+JbK8ZNu2Q5aRNEP2g85LEFSjrn5sup//hWl0yioY/1UObbw95urJhYuiZr0whSIyDx8JGZQj622TQT8rB+DKgiPT9WNX4IbISsZZHtfUkkrzWy/B2NLocWjDVoL1U0NFtVOJ6vUSNIVCXrRqty3xVNmfi8BTUTRA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768579741; c=relaxed/simple; bh=LEQ67zD2GizwFmfgfIz2kKoGg93pry3gARSDOjMr/tk=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=RkOWd+ultmOe7psWvUC+IJNLXlWMmVNCaBneSRF2MwoIC0aSkNwZ7sasaWM8dZAVDAs/7pcqCvQsUmSr+DxjCjE/zTFwT2GbKoY8uakgINbdaGY07L1ocSDs9cpmBpWaCIjWzUKFMvSF01tfvyveW0PvlOoFTLXx8fGvbnD+bFk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=D9FDqvJ8; arc=none smtp.client-ip=185.246.84.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="D9FDqvJ8" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 29EE41A28C4 for ; Fri, 16 Jan 2026 16:08:58 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id F2A8F60732; Fri, 16 Jan 2026 16:08:57 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 47BAE10B68B7D; Fri, 16 Jan 2026 17:08:56 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1768579737; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=/f1gixZHedoGOkCXCUBXXGEkdUc3U2vcZxvr9M68SYI=; b=D9FDqvJ8AitqzAkFl04x5UmEhWqcCGJkjb2PrV1oaNt6JTrxbAcw/ffweld5cGys+CeV3n f17Nn3jPl4ox/VzCyxPPBRNRI+EwWrBnA1Pq4jxyrTpazPr5PH4aHvouhkU8FVz50GODSM mVTGKWhszGJn642prMrnRaRFMi75OrEeUmoZdGRicCu65gS6EfTvrlG2rxQFAyvEpe1/wS Fcm+NvznyFuGMRSAKiBhAOrQ2iCFgMPAjh70PircsGVZF5MWB/qhFwxf2n9LSkTXCxN3pe 3DDjEfY+6LG5nFu/mC0SOCFbadh2C1WIK3GLftfZtH87+z6gvKif7/0sfqxj6A== From: Miquel Raynal To: Wolfram Sang Cc: linux-renesas-soc@vger.kernel.org, Geert Uytterhoeven , Magnus Damm , Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org Subject: Re: [RFC PATCH] ARM: dts: renesas: r9a06g032-rzn1d400-db: add QSPI node including NOR flash In-Reply-To: <20260116114852.52948-2-wsa+renesas@sang-engineering.com> (Wolfram Sang's message of "Fri, 16 Jan 2026 12:48:48 +0100") References: <20260116114852.52948-2-wsa+renesas@sang-engineering.com> User-Agent: mu4e 1.12.7; emacs 30.2 Date: Fri, 16 Jan 2026 17:08:55 +0100 Message-ID: <874ioltu94.fsf@bootlin.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Last-TLS-Session-Version: TLSv1.3 Hello Wolfram, On 16/01/2026 at 12:48:48 +01, Wolfram Sang wrote: > Enable the QSPI controller to access the connected SPI NOR flash. The > NOR datasheet may suggest faster tuning parameters but those did not > work on my board. > > Signed-off-by: Wolfram Sang > --- > > Depends on the series "[PATCH v2 00/13] spi: cadence-qspi: Add Renesas > RZ/N1 support". As this is still under discussion, this patch is RFC > only. > > The tuning values used came from Miquel and work here as well. An > interested party may try to tune this further but I will go the safe > route here. In case you feel adventurous, this paragraph made me remember that I had noted down some slightly more aggressive values related to the DB board (which I don't have) in some of my notes. A bit of digging resurrected the following: tshsl-ns =3D <30>; tsd2d-ns =3D <3>; tchsh-ns =3D <3>; tslch-ns =3D <3>; Anyhow, thanks for the follow-up patch and thanks for testing. Reviewed-by: Miquel Raynal Thanks, Miqu=C3=A8l