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

[Arseniy Krasnov]

Hi, thanks!

Thanks, Arseniy

On 22.08.2024 00:17, Michael Nazzareno Trimarchi wrote:
> 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(-)
>>>
>>
>