[PATCH v2 0/3] Meson: R/W support for pages used by boot ROM

[Michael Nazzareno Trimarchi]

Hi Arseniy

On Thu, Aug 22, 2024 at 9:04 AM Arseniy Krasnov
<avkrasnov at salutedevices.com> wrote:
>
> Hi, thanks!
>
> Thanks, Arseniy
>
> On 22.08.2024 00:17, Michael Nazzareno Trimarchi wrote:
> > Hi
> >
> > I will read them tomorrow ;)
> >
> > Thank you for understanding
> >

All the series are delegated to Neil. I will review anyway but I think
that will then pick from him

Michael

> > Michael
> >
> > Il mer 21 ago 2024, 22:25 Arseniy Krasnov <avkrasnov at salutedevices.com> ha
> > scritto:
> >
> >> Hi, sorry, pls ping  😄
> >>
> >> Thanks
> >>
> >> On 08.07.2024 10:13, Arseniy Krasnov wrote:
> >>> Patchset is based on patchset for Linux (today merged to nand-next):
> >>>
> >> https://lore.kernel.org/linux-mtd/20240507230903.3399594-1-avkrasnov@salutedevices.com/
> >>>
> >>> Here is description from it:
> >>>
> >>>  >  Amlogic's boot ROM code needs that some pages on NAND must be written
> >>>  >  in special "short" ECC mode with scrambling enabled. Such pages:
> >>>  >  1) Contain some metadata about hardware.
> >>>  >  2) Located with some interval starting from 0 offset, until some
> >>>  >     specified offset. Interval and second offset are set in the
> >>>  >     device tree.
> >>>  >
> >>>  >  This patchset adds R/W support for such pages. To enable it we can
> >> setup
> >>>  >  it in dts:
> >>>  >
> >>>  >      nand-is-boot-medium;
> >>>  >      amlogic,boot-pages = <1024>;
> >>>  >      amlogic,boot-page-step = <128>;
> >>>  >
> >>>  >  It means that each 128th page in range 0 to 1024 pages will be
> >> accessed
> >>>  >  in special mode ("short" ECC + scrambling). In practice this feature
> >> is
> >>>  >  needed when we want to update first block of NAND - driver will
> >> enable
> >>>  >  required mode by itself using value from device tree.
> >>>
> >>> The only difference is that patchset for Linux updates DT bindings, while
> >>> this adds NAND_IS_BOOT_MEDIUM flag support.
> >>>
> >>> Changelog:
> >>>  v1 -> v2:
> >>>  * Pls see per-patch changelog.
> >>>
> >>> Arseniy Krasnov (3):
> >>>   mtd: rawnand: nand_base: support for 'NAND_IS_BOOT_MEDIUM' flag
> >>>   mtd: rawnand: meson: refactor use of 'meson_nfc_cmd_access()'
> >>>   mtd: rawnand: meson: read/write access for boot ROM pages
> >>>
> >>>  drivers/mtd/nand/raw/meson_nand.c | 84 +++++++++++++++++++++----------
> >>>  drivers/mtd/nand/raw/nand_base.c  |  3 ++
> >>>  include/linux/mtd/rawnand.h       |  5 ++
> >>>  3 files changed, 65 insertions(+), 27 deletions(-)
> >>>
> >>
> >



-- 
Michael Nazzareno Trimarchi
Co-Founder & Chief Executive Officer
M. +39 347 913 2170
michael at amarulasolutions.com
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