e8c047b4a9
According to the ONFI specification, bit 0 of 'SDR timing mode support' (bytes 129-130) "shall be 1". That means the NAND supports at least timing mode 0. NAND chip Hynix H27U4G8F2GDA-BI (at least) is reading a 0 on this field which makes nand_choose_best_sdr_timings() return with error and the probe function to eventually fail. Given that sdr_timing_modes bit 0 must be 1 by specification, force it in case the NAND reports it is not set. This is a safe assumption because the mode 0 is the minimum (safer) set of timings that the NAND can work with. Signed-off-by: Hector Palacios <hector.palacios@digi.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20230223165104.525852-1-hector.palacios@digi.com Link: https://lore.kernel.org/linux-mtd/20230310080609.1930869-1-hector.palacios@digi.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 Restructured Text 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.