From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (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 98C3535963 for ; Sun, 24 Aug 2025 16:31:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.85.4 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756053070; cv=none; b=WsjgYdmECYmB3qIQ+HS8fUHiqDNIRRiksiZ+ltdQvAn7lFzVTTr4RD31u3kDTh8AODQyxWmnI/wxXEUg2wgkSBQX0dpLrGjXoZUrOeG416HAyHZBu9mUP77tPHEp9aOl+UqQTqxUIoANTk0ayPX9T90xCsNMGWpxWyBRMjt6DtQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756053070; c=relaxed/simple; bh=Gn7KbLvYVMKJjjXjrXuVd3D0X74qDKII9qi+DZSlr3Y=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=olKZ+vAJ+/2aTM4MTeTh2FF56f0x61uAG4B7q63u0CDcK7oTVv7P3ShLOl6Unqk5ksva6Idmv3KKuNAvsqK60lhZOTt5wTR7iP/djK29yJOHT53gl92H+hZfDIGYx/iKBgB2Xj9lmTXPGmmfGRGWCskMY6ewmC2gZv+YBtEp/4I= 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=GJUo5aHQ; arc=none smtp.client-ip=185.246.85.4 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="GJUo5aHQ" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id 0C47B4E40C0F; Sun, 24 Aug 2025 16:31:07 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id BEC49605F1; Sun, 24 Aug 2025 16:31:06 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 7037F1C228A68; Sun, 24 Aug 2025 18:30:58 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1756053063; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=Gn7KbLvYVMKJjjXjrXuVd3D0X74qDKII9qi+DZSlr3Y=; b=GJUo5aHQQnmkLiRWxkYrY+HJGhs9t/dxJcmhFtp+22CfaWBiZ+7lpHesFzTPxanVsmttFC Yzx79I/6fG9X4+HKif7WubdzJj5mB7WMvVItMJBqraRQ3EWISz0R0KziM4fyyvWeXn/NEu 7iDYvScbXsuSPQbMgJz5QG6XGKUL8/Q2/g1DI2HdNNH0dbHabsoxrC9Zywbxwx6rco9fS+ tGB8/++Jc+eNisi9fnqy7+tuJk9WLQuLNf1KnyrsvUycoa1WhY4YcsBlXd1mGlf12Mzbz9 jZVmGQ8+ssLYw1VX5119SyQ/V3AfPwQAc+4YrTjEN43XTMNGtOq/W9GO0HrpPw== From: Miquel Raynal To: Teng Wu Cc: richard@nod.at, vigneshr@ti.com, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, teng.wu@gigadevice.com Subject: Re: [PATCH] mtd: spinand: gigadevice: Add continuous read support In-Reply-To: <20250818135227.2114-1-gigadevice2025@gmail.com> (Teng Wu's message of "Mon, 18 Aug 2025 21:52:27 +0800") References: <20250818135227.2114-1-gigadevice2025@gmail.com> User-Agent: mu4e 1.12.7; emacs 30.1 Date: Sun, 24 Aug 2025 18:30:51 +0200 Message-ID: <87349gisw4.fsf@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@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 Teng, On 18/08/2025 at 21:52:27 +08, Teng Wu wrote: > GD5F1GM9 supports a high-speed Continuous Read (CR) mode which allows > the entire memory array to be read out by a single read command > without re-issuing the 13h =E2=80=9CPage Read to Cache=E2=80=9D command f= or every page. > > Datasheet summary > Feature register B0[3] (NR bit) > 1 =3D Normal Read (default) > 0 =3D Continuous Read (CR) > > ECC status register 7Ch > Normal read: bits [3:0] =E2=86=92 ECC status of last page > Continuous read: bits [7:4] =E2=86=92 accumulated max bit-flips over the > whole sequential read operation. > > Datasheet: > https://github.com/WT-886/DATASHEET/blob/main/GD5F1GM9-v1.0.pdf > > Signed-off-by: Teng Wu > --- I am happy to see more defines benefiting from this feature! Would you mind sharing the result of a speed test? `flash_speed -c10 -d /dev/mtdx` Thanks! Miqu=C3=A8l