From: "Albrecht Dreß" <albrecht.dress@arcor.de>
To: Grant Likely <grant.likely@secretlab.ca>
Cc: devicetree-discuss@ozlabs.org,
Wolfram Sang <w.sang@pengutronix.de>,
linuxppc-dev@ozlabs.org, linux-mtd@lists.infradead.org,
Ben Dooks <ben-linux@fluff.org>,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH V2 2/2] mtd/maps/mtd-ram: add an of-platform driver
Date: Sat, 06 Jun 2009 18:16:06 +0200 [thread overview]
Message-ID: <1244304966.6356.1@antares> (raw)
In-Reply-To: <fa686aa40906060905y1d39dce1j87d993ceb94273be@mail.gmail.com> (from grant.likely@secretlab.ca on Sat Jun 6 18:05:41 2009)
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Am 06.06.09 18:05 schrieb(en) Grant Likely:
> > + - bank-width : Width (in bytes) of the RAM bank.
>
> Question: why is bank-width even relevant for a RAM device?
At least if the RAM is attached to the 5200's Local Plus Bus in 16-bit
mode, no byte write accesses are allowed (byte /reads/ work, though).
I have a tweak (which I will post next week) to address this case,
which depends upon this setting. No idea if the same happens on other
chips and/or on 5200 in 32-bit (muxed) mode, but I guess similar
effects will pop up there, too.
Cheers, Albrecht.
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WARNING: multiple messages have this Message-ID (diff)
From: "Albrecht Dreß" <albrecht.dress@arcor.de>
To: Grant Likely <grant.likely@secretlab.ca>
Cc: devicetree-discuss@ozlabs.org, linuxppc-dev@ozlabs.org,
linux-mtd@lists.infradead.org, Ben Dooks <ben-linux@fluff.org>,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH V2 2/2] mtd/maps/mtd-ram: add an of-platform driver
Date: Sat, 06 Jun 2009 18:16:06 +0200 [thread overview]
Message-ID: <1244304966.6356.1@antares> (raw)
In-Reply-To: <fa686aa40906060905y1d39dce1j87d993ceb94273be@mail.gmail.com> (from grant.likely@secretlab.ca on Sat Jun 6 18:05:41 2009)
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Am 06.06.09 18:05 schrieb(en) Grant Likely:
> > + - bank-width : Width (in bytes) of the RAM bank.
>
> Question: why is bank-width even relevant for a RAM device?
At least if the RAM is attached to the 5200's Local Plus Bus in 16-bit
mode, no byte write accesses are allowed (byte /reads/ work, though).
I have a tweak (which I will post next week) to address this case,
which depends upon this setting. No idea if the same happens on other
chips and/or on 5200 in 32-bit (muxed) mode, but I guess similar
effects will pop up there, too.
Cheers, Albrecht.
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WARNING: multiple messages have this Message-ID (diff)
From: "Albrecht Dreß" <albrecht.dress-KvP5wT2u2U0@public.gmane.org>
To: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: devicetree-discuss-mnsaURCQ41sdnm+yROfE0A@public.gmane.org,
linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org,
linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>,
David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Subject: Re: [PATCH V2 2/2] mtd/maps/mtd-ram: add an of-platform driver
Date: Sat, 06 Jun 2009 18:16:06 +0200 [thread overview]
Message-ID: <1244304966.6356.1@antares> (raw)
In-Reply-To: <fa686aa40906060905y1d39dce1j87d993ceb94273be-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> (from grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org on Sat Jun 6 18:05:41 2009)
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Am 06.06.09 18:05 schrieb(en) Grant Likely:
> > + - bank-width : Width (in bytes) of the RAM bank.
>
> Question: why is bank-width even relevant for a RAM device?
At least if the RAM is attached to the 5200's Local Plus Bus in 16-bit
mode, no byte write accesses are allowed (byte /reads/ work, though).
I have a tweak (which I will post next week) to address this case,
which depends upon this setting. No idea if the same happens on other
chips and/or on 5200 in 32-bit (muxed) mode, but I guess similar
effects will pop up there, too.
Cheers, Albrecht.
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next prev parent reply other threads:[~2009-06-06 16:16 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-05 12:05 [PATCH V2 0/2] mtd/maps/mtd-ram: Make driver usable for the device tree Wolfram Sang
2009-06-05 12:05 ` Wolfram Sang
2009-06-05 12:05 ` Wolfram Sang
2009-06-05 12:05 ` [PATCH V2 1/2] mtd/maps/mtd-ram: refactor probe and remove Wolfram Sang
2009-06-05 12:05 ` Wolfram Sang
2009-06-05 12:05 ` Wolfram Sang
2009-06-05 12:05 ` [PATCH V2 2/2] mtd/maps/mtd-ram: add an of-platform driver Wolfram Sang
2009-06-05 12:05 ` Wolfram Sang
2009-06-05 12:05 ` Wolfram Sang
2009-06-05 15:53 ` Grant Likely
2009-06-05 15:53 ` Grant Likely
2009-06-05 15:53 ` Grant Likely
2009-06-05 16:22 ` Albrecht Dreß
2009-06-05 16:22 ` Albrecht Dreß
2009-06-06 8:14 ` David Woodhouse
2009-06-06 8:14 ` David Woodhouse
2009-06-06 8:14 ` David Woodhouse
2009-06-06 11:19 ` Wolfram Sang
2009-06-06 11:19 ` Wolfram Sang
2009-06-06 11:19 ` Wolfram Sang
2009-07-01 18:22 ` Ken MacLeod
2009-07-17 11:41 ` Wolfram Sang
2009-06-16 9:09 ` Wolfram Sang
2009-06-16 9:09 ` Wolfram Sang
2009-06-16 9:09 ` Wolfram Sang
2009-06-06 16:05 ` Grant Likely
2009-06-06 16:05 ` Grant Likely
2009-06-06 16:05 ` Grant Likely
2009-06-06 16:16 ` Albrecht Dreß [this message]
2009-06-06 16:16 ` Albrecht Dreß
2009-06-06 16:16 ` Albrecht Dreß
2009-06-08 16:35 ` Wolfram Sang
2009-06-08 16:35 ` Wolfram Sang
2009-06-08 17:30 ` Albrecht Dreß
2009-06-08 17:30 ` Albrecht Dreß
2009-06-08 17:30 ` Albrecht Dreß
2009-06-15 17:43 ` Albrecht Dreß
2009-06-15 17:43 ` Albrecht Dreß
2009-06-16 9:18 ` Wolfram Sang
2009-06-16 9:18 ` Wolfram Sang
2009-06-16 9:18 ` Wolfram Sang
2009-06-16 12:53 ` Grant Likely
2009-06-16 12:53 ` Grant Likely
2009-06-16 12:53 ` Grant Likely
2009-06-16 13:20 ` Wolfram Sang
2009-06-16 13:20 ` Wolfram Sang
[not found] ` <fa686aa40906160833g1d77466ekf8b8d4350ab32a24@mail.gmail.com>
2009-06-16 15:34 ` Grant Likely
2009-06-16 15:34 ` Grant Likely
2009-06-16 15:34 ` Grant Likely
2009-06-16 17:19 ` Albrecht Dreß
2009-06-16 17:19 ` Albrecht Dreß
2009-06-16 17:19 ` Albrecht Dreß
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