Messages in this thread | | | Date | Thu, 13 Nov 2014 10:26:39 -0600 | From | Graham Moore <> | Subject | RE: [V5 PATCH 1/1] driver:mtd:spi-nor: Add quad I/O support for Micron spi nor |
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On Wed, 12 Nov 2014, bpqw wrote:
> This maybe your spi controller is still extended mode, > Once EVCR bit 7 is set to 0, the spi nor device will operate in quad I/O.Command-address-data line is 4-x-4. > So after send WRITE EVCR command , spi controller also must transfer to quad I/O Mode,and set its Command-address-data line also > Should be 4-x-4 .
Thanks, this helped. I added some code to snoop the command stream for WRITE EVCR with quad mode, and then set up the quad mode in the controller. Seems kinda ugly, but working now.
-Graham
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