linux-kernel - Re: [PATCH 3/3] mtd: rawnand: qcom: Add support for page scope read

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Date:   Tue, 28 Sep 2021 14:54:40 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     mdalam@...eaurora.org
Cc:     mani@...nel.org, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org, sricharan@...eaurora.org
Subject: Re: [PATCH 3/3] mtd: rawnand: qcom: Add support for page scope read

Hello,

mdalam@...eaurora.org wrote on Tue, 28 Sep 2021 17:51:00 +0530:

> On 2021-09-15 15:27, Md Sadre Alam wrote:
> > QPIC V2.0 onwards QPIC controller support enhanced read mode
> > like page scope read and multi page read.
> > 
> > In QPIC V1, SW is needed to write EXEC_CMD register for each

                the driver needs to (same below)

> > Code word and collect any Status related to that CW before
> > issueing EXEC_CMD for next CW.
> > 
> > Page scope command is truly a page mode command where SW is
> > required to issue EXEC_CMD only once for a page. Controller
> > HW takes care of Codeword specific details and automatically
> > returns status associated with each CW to BAM pipe, dedicated
> > for status deposition.
> > 
> > With this command, SW now can issue one read command for a page
> > and upon receiving completion interrupt, can process status,
> > that have already been deposited in memory through status BAM pipe.
> > 
> > Signed-off-by: Md Sadre Alam <mdalam@...eaurora.org>
> > ---
> >  drivers/mtd/nand/raw/qcom_nandc.c | 77 > ++++++++++++++++++++++++++++++++++++---
> >  1 file changed, 71 insertions(+), 6 deletions(-)
> > 

Thanks,
Miquèl