linux-kernel - Re: [PATCH linux-next v5 1/5] mtd: spi-nor: notify (Q)SPI controller about protocol change

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Date:	Tue, 8 Sep 2015 18:29:10 +0200
From:	Marek Vasut <marex@...x.de>
To:	Cyrille Pitchen <cyrille.pitchen@...el.com>
Cc:	Jonas Gorski <jogo@...nwrt.org>, nicolas.ferre@...el.com,
	Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
	David Woodhouse <dwmw2@...radead.org>,
	"Brian Norris" <computersforpeace@...il.com>,
	Rafał Miłecki <zajec5@...il.com>,
	"Bean Huo (beanhuo)" <beanhuo@...ron.com>,
	Gabor Juhos <juhosg@...nwrt.org>, shijie.huang@...el.com,
	Ben Hutchings <ben@...adent.org.uk>,
	Mark Rutland <mark.rutland@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	"MTD Maling List" <linux-mtd@...ts.infradead.org>,
	Kumar Gala <galak@...eaurora.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH linux-next v5 1/5] mtd: spi-nor: notify (Q)SPI controller about protocol change

On Tuesday, September 08, 2015 at 06:20:05 PM, Cyrille Pitchen wrote:
> Hi Jonas,
> 
> taking your comments into account I'm about to test a new series with
> additional patches to handle the Read ID command in multiple I/O protocols
> and relying on new members in the struct spi_nor:
> 
>  * @erase_proto:	the SPI protocol used by erase operations
>  * @read_proto:		the SPI protocol used by read operations
>  * @write_proto:	the SPI protocol used by write operations
>  * @reg_proto		the SPI protocol used by read_reg/write_reg operations
> 
> 	enum spi_protocol	erase_proto;
> 	enum spi_protocol	read_proto;
> 	enum spi_protocol	write_proto;
> 	enum spi_protocol	reg_proto;
> 
> This way, the read(), write(), erase(), read_reg() and write_reg() hooks
> can check the relevant protocol member so the spi-nor framework doesn't
> need to call spi_nor_set_protocol() before any command.
> 
> Also the op codes for read, page program and erase commands will be tuned
> depending on the memory manufacturer and the selected SPI protocol.
> 
> I'm likely to publish this new series tomorrow after my tests on a Micron
> memory.

Excellent, please keep me on Cc as I'm already warming up my Spansion part ;-)

Best regards,
Marek Vasut
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