Re: [PATCH v4 0/3] mtd: Support slc-mode for NTC CHIP

From: Chris Morgan <macromorgan@hotmail.com>
To: Jagan Teki <jagan@amarulasolutions.com>
Cc: Chris Morgan <macroalpha82@gmail.com>,
	u-boot@lists.denx.de, miquel.raynal@bootlin.com, wd@denx.de,
	sjg@chromium.org
Subject: Re: [PATCH v4 0/3] mtd: Support slc-mode for NTC CHIP
Date: Thu, 10 Mar 2022 09:27:53 -0600	[thread overview]
Message-ID: <SN6PR06MB5342A9308560B7DDC3115EF0A50B9@SN6PR06MB5342.namprd06.prod.outlook.com> (raw)
In-Reply-To: <CAMty3ZA5t7eRpjzaGHDL1J4-F0cLJgc5Egnr7vi=4QKVi7XBqw@mail.gmail.com>

On Thu, Mar 10, 2022 at 05:30:17PM +0530, Jagan Teki wrote:
> Hi Chris,
> 
> On Thu, Jan 20, 2022 at 6:44 PM Jagan Teki <jagan@amarulasolutions.com> wrote:
> >
> > On Fri, Dec 17, 2021 at 12:14 AM Chris Morgan <macroalpha82@gmail.com> wrote:
> > >
> > > From: Chris Morgan <macromorgan@hotmail.com>
> > >
> > > Add support for slc-mode implemented in Linux for the Toshiba
> > > TC58TEG5DCLTA00 NAND and Hynix H27UCG8T2ETR NAND flash found on the NTC
> > > CHIP. This requires the addition of a paired-pages scheme, a new
> > > parameter for MTD partitions of slc-mode, and setting the correct
> > > paired-pages scheme for the TC58TEG5DCLTA00  and H27UCG8T2ETR flash
> > > chips.
> > >
> > > Changes since V3:
> > >   - Rebased against master branch as of 2021-12-16.
> > >   - Added slc mode support for mtdparts command.
> > >
> > > Changes since V2:
> > >  - Copied upstream Linux implementation of mtd_erase to fix an issue
> > >    with creating new ubi partitions.
> > >  - Implemented paired page scheme and added support for Hynix flash
> > >    chip. Based on a cursory reading of the datasheet it appears to use
> > >    the same pairing scheme as the Toshiba chip.
> > >
> > > Changes since V1:
> > >
> > >  - Updated mtd_read and mtd_write to match upstream Linux.
> > >  - Additional mtd_get_master to match upstream Linux.
> > >  - Removed notes about ubifs not working, because it is now.
> > >
> > > Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
> > >
> > > Chris Morgan (3):
> > >   mtd: Add support for Linux slc-mode for MLC NAND
> > >   mtd: Add pairing info for Toshiba TC58TEG5DCLTA00 NAND
> > >   mtd: Add pairing info for Hynix H27UCG8T2ETR NAND
> 
> Do you have any updated version for this or it is final itself?

Should be final, but I can rebase it again if need be. I've been
running this successfully for the better part of about 3 months
now with no more visible issues on my end. I never got fastboot
to talk to the mtd subsystem the way I was hoping, but in the end
was able to sidestep the issue with an swupdate based flash tool.

Thank you,
Chris.

> 
> Thanks,
> Jagan,