linux-kernel - Re: [PATCH v3 08/13] mtd: st_spi_fsm: Update the JEDEC probe to handle extended READIDs

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Message-ID: <20150113050715.GQ9759@ld-irv-0074>
Date:	Mon, 12 Jan 2015 21:07:15 -0800
From:	Brian Norris <computersforpeace@...il.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-mtd@...ts.infradead.org, kernel@...inux.com,
	Angus Clark <angus.clark@...com>,
	Carmelo Amoroso <carmelo.amoroso@...com>
Subject: Re: [PATCH v3 08/13] mtd: st_spi_fsm: Update the JEDEC probe to
 handle extended READIDs

On Mon, Dec 15, 2014 at 11:59:15AM +0000, Lee Jones wrote:
> The previous code was based on 3-byte JEDEC IDs, with a possible 2-byte
> extension.  However, devices are now emerging that return 6 or more bytes of
> READID data and the additional bytes are required to differentiate between
> variants or generations of similar devices.
> 
> This patch refactors the device table and JEDEC probe code to handle arbitrary
> length READIDs, with the standard JEDEC definition now becoming a special case.
> Functionally, there should be no change in behaviour.  A subsequent patch will
> update the table with extended READIDs where applicable.

BTW, how's that promise going, where you work on adapting this driver to
the spi-nor framework? We've already done some of this same work there.

> +#define RDID(...) __VA_ARGS__  /* Dummy macro to protect array argument. */

What? What needs "protected"?

...

Brian
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