mirror of
https://github.com/torvalds/linux.git
synced 2026-02-04 15:28:49 +08:00
46dde01f6b
This patch extracts some chunks from spi_nor_init_params and spi_nor_scan() and moves them into a new spi_nor_init() function. Indeed, spi_nor_init() regroups all the required SPI flash commands to be sent to the SPI flash memory before performing any runtime operations (Fast Read, Page Program, Sector Erase, ...). Hence spi_nor_init(): 1) removes the flash protection if applicable for certain vendors. 2) sets the Quad Enable bit, if needed, before using Quad SPI protocols. 3) makes the memory enter its (stateful) 4-byte address mode, if needed, for SPI flash memory > 128Mbits not supporting the 4-byte address instruction set. spi_nor_scan() now ends by calling spi_nor_init() once the probe phase has completed. Further patches could also use spi_nor_init() to implement the mtd->_resume() handler for the spi-nor framework. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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.