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Message-ID: <alpine.DEB.2.02.1411130945300.19890@lava-test-server> Date: Thu, 13 Nov 2014 10:26:39 -0600 From: Graham Moore <grmoore@...nsource.altera.com> To: bpqw <bpqw@...ron.com> CC: Graham Moore <grmoore@...nsource.altera.com>, Brian Norris <computersforpeace@...il.com>, Marek Vasut <marex@...x.de>, "dwmw2@...radead.org" <dwmw2@...radead.org>, "geert+renesas@...der.be" <geert+renesas@...der.be>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>, "shijie8@...il.com" <shijie8@...il.com> Subject: RE: [V5 PATCH 1/1] driver:mtd:spi-nor: Add quad I/O support for Micron spi nor 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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