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The Denali IP can automatically detect device parameters such as
page size, oob size, device width, etc. and this driver currently
relies on it. However, this hardware function is known to be
problematic.
[1] Due to a hardware bug, various misdetected cases were reported.
That is why get_toshiba_nand_para() and get_hynix_nand_para()
exist to fix-up the misdetected parameters. It is not realistic
to add a new NAND device to the *black list* every time we are
hit by a misdetected case. We would never be able to guarantee
that all cases are covered.
[2] Because this feature is unreliable, it is disabled on some
platforms.
The nand_scan_ident() detects device parameters in a more tested
way. The hardware should not set the device parameter registers in
a different, unreliable way. Instead, set the parameters from the
nand_scan_ident() back to the registers.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.