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

[Michael Nazzareno Trimarchi]

Hi

I will read them tomorrow ;)

Thank you for understanding

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(-)
> >
>