[PATCH v2 0/3] Meson: R/W support for pages used by boot ROM
Michael Nazzareno Trimarchi
michael at amarulasolutions.com
Wed Aug 21 23:17:51 CEST 2024
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(-)
> >
>
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