mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-14 01:49:20 -04:00
b2d2c2b8af
Prevent PMECC errors when reading from AMD/Spansion S34ML02G1 flash on SAM9X60 SoC, after switching to ONFI timing mode 3. From reading the S34ML02G1 and the SAM9X60 datasheets again, it seems like we have to wait tREA after rising RE# before sampling the data. Thus pulse must be at least tREA. The previous approach to set this timing worked on sam9g20 and sama5d2 with the same flash (S34ML02G1), probably because those have a slower mck clock rate and thus the resolution of the timings setup is not as tight as with sam9x60. The approach to fix the issue was carried over from u-boot, which itself got it from at91bootstrap. It has been successfully tested in at91bootstrap, U-Boot and Linux on sam9x60 and sama5d2, for several months here. Link: https://github.com/linux4sam/at91bootstrap/issues/174 Link:e2dfd8141dLink: https://lore.kernel.org/u-boot/20240415075755.780653-1-ada@thorsis.com/ Link:344e2f2cd4Cc: Li Bin <bin.li@microchip.com> Signed-off-by: Alexander Dahl <ada@thorsis.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.