Messages in this thread | | | From | bpqw <> | Subject | RE: [V5 PATCH 1/1] driver:mtd:spi-nor: Add quad I/O support for Micron spi nor | Date | Wed, 12 Nov 2014 01:19:18 +0000 |
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>I have almost verified all the micros parts for operating quad mode and the quad enable bit is >volatile by default and no need to set it on software.
>Why this code is meant for - does micron has changed this bit operation on newly added parts?
>thanks! >-- >Jagan.
For Micron Spi norflash,if you want to make it work Quad I/O mode,you can do it by set Two registers,Nonvolatile Configuration resister(NVCR) and Enhanced volatile confuration register(EVCR), but according to spi-nor.c,and micron spi nor,we recommend that if want to enable Micron spi nor Quad I/O mode,the best way is to set EVCR. Of course,you can use Quad/Dual operation command to read/write Micron spi nor in the spi nor Extended I/O mode. But their command-address-data is different.
The purpose of this patch is only to enable Micron spi nor Quad I/O mode,if want to make Micron spi nor work Under Quad I/O mode.
Hi,Brian
How about this patch?Please give me some tips,thanks.
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