LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Brian Norris <computersforpeace@gmail.com>
To: Lee Jones <lee.jones@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kernel@stlinux.com,
	linux-mtd@lists.infradead.org, devicetree@vger.kernel.org
Subject: Re: [PATCH v4 02/10] mtd: st_spi_fsm: Fetch boot device locations from DT match tables
Date: Mon, 30 Mar 2015 11:16:11 -0700	[thread overview]
Message-ID: <20150330181611.GC32500@ld-irv-0074> (raw)
In-Reply-To: <20150316081306.GD3383@x1>

On Mon, Mar 16, 2015 at 08:13:06AM +0000, Lee Jones wrote:
> So when you said "we have consistently agreed that we aren't going to
> work around that in Linux", who has agreed this.  Would you be kind
> enough to point me in the direction of that conversation please?

A few pointers from recent history:

http://lists.infradead.org/pipermail/linux-mtd/2014-September/055156.html

http://lists.infradead.org/pipermail/linux-mtd/2014-September/055559.html

If the question came up in other threads, though, I'm sure the answers
were the same.

BTW, there are sound solutions to this problem in Linux, and they are
supported where possible. Some flash support a separate set of opcodes
that always expect a 4-byte address. If we use these opcodes, we never
have to do any persistent mode-switching. We only found that Spansion
consistently supports these opcodes on all their flash, though.

See:

commit 87c9511fba2bd069a35e1312587a29e112fc0cd6
Author: Brian Norris <computersforpeace@gmail.com>
Date:   Thu Apr 11 01:34:57 2013 -0700

    mtd: m25p80: utilize dedicated 4-byte addressing commands

Brian

  reply	other threads:[~2015-03-30 18:16 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-21 15:24 [PATCH v4 00/10] mtd: st_spi_fsm: Align with ST's internal development Lee Jones
2015-01-21 15:24 ` [PATCH v4 01/10] mtd: st_spi_fsm: dt-bindings: Deprecate generic compatible string Lee Jones
2015-01-21 15:24 ` [PATCH v4 02/10] mtd: st_spi_fsm: Fetch boot device locations from DT match tables Lee Jones
2015-02-06  4:27   ` Brian Norris
2015-02-10  7:46     ` Lee Jones
2015-02-24  5:04       ` Brian Norris
2015-02-24  9:41         ` Lee Jones
2015-03-13 16:06           ` Brian Norris
2015-03-16  8:13             ` Lee Jones
2015-03-30 18:16               ` Brian Norris [this message]
2015-01-21 15:24 ` [PATCH v4 03/10] mtd: st_spi_fsm: Add support for Micron N25Q512A Lee Jones
2015-01-21 15:24 ` [PATCH v4 04/10] mtd: st_spi_fsm: Add support for N25Q512 and N25Q00A devices Lee Jones
2015-01-21 15:24 ` [PATCH v4 05/10] mtd: st_spi_fsm: Update the JEDEC probe to handle extended READIDs Lee Jones
2015-01-21 15:24 ` [PATCH v4 06/10] mtd: st_spi_fsm: Update Spansion device entries Lee Jones
2015-01-21 15:24 ` [PATCH v4 07/10] mtd: st_spi_fsm: Improve busy wait handling Lee Jones
2015-01-21 15:24 ` [PATCH v4 08/10] mtd: st_spi_fsm: General tidy-up Lee Jones
2015-01-21 15:24 ` [PATCH v4 09/10] ARM: STi: stih416: Use new platform specific compatible string Lee Jones
2015-01-21 15:24 ` [PATCH v4 10/10] ARM: STi: stih416: Supply EMI clock reference to FSM SPI NOR Lee Jones

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20150330181611.GC32500@ld-irv-0074 \
    --to=computersforpeace@gmail.com \
    --cc=devicetree@vger.kernel.org \
    --cc=kernel@stlinux.com \
    --cc=lee.jones@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mtd@lists.infradead.org \
    --subject='Re: [PATCH v4 02/10] mtd: st_spi_fsm: Fetch boot device locations from DT match tables' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).