linux-kernel - Re: [PATCH] [PATCH v5] mtd:spi-nor: Add Altera Quad SPI Driver

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Date:	Thu, 20 Aug 2015 11:01:58 +0200
From:	Marek Vasut <marex@...x.de>
To:	Viet Nga Dao <vndao@...era.com>
Cc:	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	Brian Norris <computersforpeace@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"nga_chi86" <ngachi86@...il.com>
Subject: Re: [PATCH] [PATCH v5] mtd:spi-nor: Add Altera Quad SPI Driver

On Thursday, August 20, 2015 at 10:17:57 AM, Viet Nga Dao wrote:
> Sorry for missing to reply the last question

Hi!

> >>> diff --git a/drivers/mtd/spi-nor/spi-nor.c
> >>> b/drivers/mtd/spi-nor/spi-nor.c index 14a5d23..2ab7279 100644
> >>> --- a/drivers/mtd/spi-nor/spi-nor.c
> >>> +++ b/drivers/mtd/spi-nor/spi-nor.c
> >>> @@ -687,6 +687,24 @@ static const struct spi_device_id spi_nor_ids[] =
> >>> {
> >>> 
> >>>       { "cat25c09", CAT25_INFO( 128, 8, 32, 2, SPI_NOR_NO_ERASE |
> >>> 
> >>> SPI_NOR_NO_FR) }, { "cat25c17", CAT25_INFO( 256, 8, 32, 2,
> >>> SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) }, { "cat25128", CAT25_INFO(2048, 8,
> >>> 64, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) }, +
> >>> +     /* Altera EPCQ/EPCS Flashes are non-JEDEC */
> >> 
> >> Are they really ? Last time I checked on CV SoC, I was able to read
> >> their JEDEC ID just fine ; though it's true I used that EPCS core.
> 
> Altera EPCS flash is non-jedec device. And this new controller is not
> EPCS controller. If you look at the documentation i sent in another
> email, they are not the same.

https://www.altera.com/content/dam/altera-
www/global/en_US/pdfs/literature/hb/cfg/cfg_cf52012.pdf page 15 ; seems
like opcode 0x9f is supported. All the other opcodes seems compatible too.
What is the problem ?

Best regards,
Marek Vasut
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