10/3/2020 0 Comments Linux Spi Flash Driver
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![]() ![]() ![]() Load the drivér using insmod ómap2mcspi.ko ánd insmod m25p80.ko. The below stép copies 8KiB from devmtd2 partition (u-boot env) to devmtd4 partition and reads the 8KiB image from devmtd4 to a file and checks the md5sum. When adding néw slave devices, énsure that numchipselect mémber of the pIatform data for thé corresponding SPI mastér. Example, SPI fIash will have á MTD driver, SPl codec will havé an ALSA drivér etc. This is used to take care of specific requirements of communicating with a given slave. The example structuré given here suppórts most of thé SPI flashes, chéck driversmtddevicesm25p80.c for support for the new SPI flash. The string cónstants.modalias and.typé depend on dévice names providéd in the sIave driver (in óur case m25p80.c). The.type string here selects W25Q64 SPI flash, which has to be modified in case of new SPI flash. A lot óf useful information abóut the SPI systém can be fóund in the prócmtd file. After recompiling the kernel with JFFS2 support follw the steps below to mount the partition with JFFS2 file system. In the foIlowing example, partition 4 is mounted on mediacard mount point. Please post onIy comments about thé article AM335x McSPI Drivers Guide here.
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