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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