linux-kernel - Re: [PATCH 0/3] mtd: nand: add Broadcom NAND controller support

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Date:	Mon, 9 Mar 2015 10:59:38 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Rafał Miłecki <zajec5@...il.com>
Cc:	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	Dmitry Torokhov <dtor@...gle.com>,
	Anatol Pomazao <anatol@...gle.com>,
	Ray Jui <rjui@...adcom.com>,
	Corneliu Doban <cdoban@...adcom.com>,
	Jonathan Richardson <jonathar@...adcom.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	bcm-kernel-feedback-list@...adcom.com,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kevin Cernekee <cernekee@...il.com>,
	Hauke Mehrtens <hauke@...ke-m.de>
Subject: Re: [PATCH 0/3] mtd: nand: add Broadcom NAND controller support

On Sun, Mar 08, 2015 at 12:18:39PM +0100, Rafał Miłecki wrote:
> On 8 March 2015 at 01:57, Brian Norris <computersforpeace@...il.com> wrote:
> > 3. I was told that there were only 2 or 3 chips that were released with
> > a v6.1 NAND controller, and BCM4708 wasn't one of them. Apparently I was
> > told wrong... I'll have to see if there are any other quirks we should
> > be accounting for.
> 
> Please note I'm speaking about 6.01, not 6.10. Maybe it make a difference?
> 
> Buffalo WZR-600DHP2 (BCM47081)
> [    0.325732] [brcmnand_revision_init:371] ctrl->nand_version:0x0601
> [    4.838105] bcma: bus0: Found chip with id 53010, rev 0x00 and package 0x02
> 
> Buffalo WZR-1750DHP (BCM4708)
> [    0.326823] [brcmnand_revision_init:371] ctrl->nand_version:0x0601
> [    6.674288] bcma: bus0: Found chip with id 53010, rev 0x00 and package 0x02
> 
> Netgear R6250 V1 (BCM4708)
> [    0.326248] [brcmnand_revision_init:371] ctrl->nand_version:0x0601
> [    8.721335] bcma: bus0: Found chip with id 53010, rev 0x00 and package 0x02
> 
> Netgear R8000 (BCM4709)
> [    0.241961] bcma: bus0: Found chip with id 53010, rev 0x00 and package 0x00
> [    1.990330] bcm_nand bcma0:18: NAND Controller rev 6.01

We've never had a MINOR number larger than 4 or 5, I think, so I haven't
actually bothered with two digits past the decimal. It's 8 bits of MAJOR
and 8 bits of MINOR, but we just call it 6.1 in all our documentation.

0x0601 == v6.1
0x0701 == v7.1

I suppose if we ever have to care (e.g., we get past 7.9), we'd probably
call it 7.10 (0x070a). Kinda like kernel versioning (and not like Ubuntu
versioning).

Brian
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