From: Nicolas Ferre <nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Cc: Nikolaus Voss <n.voss-+umVssTZoCsb1SvskN2V4Q@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org,
balbi-l0cyMroinI0@public.gmane.org,
h.feurstein-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
rmallon-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
adrian.yanes-uOixanVlb7U@public.gmane.org,
ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org,
carsten.behling-0M7HhAU3Y85FsXB23wyQUg@public.gmane.org
Subject: Re: [PATCH v11 0/4] AT91: replace old i2c-at91.c TWI driver
Date: Wed, 12 Sep 2012 09:59:01 +0200 [thread overview]
Message-ID: <505040C5.4090703@atmel.com> (raw)
In-Reply-To: <cover.1346225321.git.n.voss-+umVssTZoCsb1SvskN2V4Q@public.gmane.org>
On 08/29/2012 09:28 AM, Nikolaus Voss :
> The old driver has two main deficencies:
> i) No repeated start (Sr) condiction is possible, this makes it unusable
> e.g. for most SMBus transfers.
> ii) I/O was done with polling/busy waiting what caused over-/underruns
> even at light system loads and clock speeds.
>
> The new driver overcomes these deficencies and in addition allows for
> more than one TWI interface.
>
> A remaining limitation is the fact, that only one repeated start is
> possible (two concatenated messages). This limitation is imposed by
> the hardware. However, this should not be a problem as all common
> i2c-client communication does not rely on more than one repeated start.
>
> Changes since v11:
> - corrected wrong id_entry on sam9261 twi gpio pdev
Hi Wolfram,
Despite the patch revision written in the subject, it is actually the
real v12 patch series from Nikolaus.
BTW, I suspect that you were not in copy...
In addition to the "Tested-By" tag by Ludovic, you can add my:
Reviewed-by: Nicolas Ferre <nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
> Nikolaus Voss (4):
> drivers/i2c/busses/i2c-at91.c: remove old polling driver
> Replace clk_lookup.con_id with clk_lookup.dev_id entries for twi clk
> drivers/i2c/busses/i2c-at91.c: add new driver
> G45 TWI: remove open drain setting for twi function gpios
>
> arch/arm/mach-at91/at91rm9200.c | 1 +
> arch/arm/mach-at91/at91rm9200_devices.c | 9 +
> arch/arm/mach-at91/at91sam9260.c | 1 +
> arch/arm/mach-at91/at91sam9261.c | 1 +
> arch/arm/mach-at91/at91sam9261_devices.c | 9 +
> arch/arm/mach-at91/at91sam9263.c | 1 +
> arch/arm/mach-at91/at91sam9g45.c | 2 +
> arch/arm/mach-at91/at91sam9g45_devices.c | 6 -
> arch/arm/mach-at91/at91sam9rl.c | 2 +
> arch/arm/mach-at91/at91sam9x5.c | 3 +
> arch/arm/mach-at91/include/mach/at91_twi.h | 68 ----
> drivers/i2c/busses/Kconfig | 11 +-
> drivers/i2c/busses/i2c-at91.c | 591 ++++++++++++++++++----------
> 13 files changed, 418 insertions(+), 287 deletions(-)
> delete mode 100644 arch/arm/mach-at91/include/mach/at91_twi.h
>
--
Nicolas Ferre
WARNING: multiple messages have this Message-ID (diff)
From: nicolas.ferre@atmel.com (Nicolas Ferre)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v11 0/4] AT91: replace old i2c-at91.c TWI driver
Date: Wed, 12 Sep 2012 09:59:01 +0200 [thread overview]
Message-ID: <505040C5.4090703@atmel.com> (raw)
In-Reply-To: <cover.1346225321.git.n.voss@weinmann.de>
On 08/29/2012 09:28 AM, Nikolaus Voss :
> The old driver has two main deficencies:
> i) No repeated start (Sr) condiction is possible, this makes it unusable
> e.g. for most SMBus transfers.
> ii) I/O was done with polling/busy waiting what caused over-/underruns
> even at light system loads and clock speeds.
>
> The new driver overcomes these deficencies and in addition allows for
> more than one TWI interface.
>
> A remaining limitation is the fact, that only one repeated start is
> possible (two concatenated messages). This limitation is imposed by
> the hardware. However, this should not be a problem as all common
> i2c-client communication does not rely on more than one repeated start.
>
> Changes since v11:
> - corrected wrong id_entry on sam9261 twi gpio pdev
Hi Wolfram,
Despite the patch revision written in the subject, it is actually the
real v12 patch series from Nikolaus.
BTW, I suspect that you were not in copy...
In addition to the "Tested-By" tag by Ludovic, you can add my:
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> Nikolaus Voss (4):
> drivers/i2c/busses/i2c-at91.c: remove old polling driver
> Replace clk_lookup.con_id with clk_lookup.dev_id entries for twi clk
> drivers/i2c/busses/i2c-at91.c: add new driver
> G45 TWI: remove open drain setting for twi function gpios
>
> arch/arm/mach-at91/at91rm9200.c | 1 +
> arch/arm/mach-at91/at91rm9200_devices.c | 9 +
> arch/arm/mach-at91/at91sam9260.c | 1 +
> arch/arm/mach-at91/at91sam9261.c | 1 +
> arch/arm/mach-at91/at91sam9261_devices.c | 9 +
> arch/arm/mach-at91/at91sam9263.c | 1 +
> arch/arm/mach-at91/at91sam9g45.c | 2 +
> arch/arm/mach-at91/at91sam9g45_devices.c | 6 -
> arch/arm/mach-at91/at91sam9rl.c | 2 +
> arch/arm/mach-at91/at91sam9x5.c | 3 +
> arch/arm/mach-at91/include/mach/at91_twi.h | 68 ----
> drivers/i2c/busses/Kconfig | 11 +-
> drivers/i2c/busses/i2c-at91.c | 591 ++++++++++++++++++----------
> 13 files changed, 418 insertions(+), 287 deletions(-)
> delete mode 100644 arch/arm/mach-at91/include/mach/at91_twi.h
>
--
Nicolas Ferre
WARNING: multiple messages have this Message-ID (diff)
From: Nicolas Ferre <nicolas.ferre@atmel.com>
To: <linux-arm-kernel@lists.infradead.org>,
<linux-i2c@vger.kernel.org>, Wolfram Sang <w.sang@pengutronix.de>
Cc: Nikolaus Voss <n.voss@weinmann.de>,
<linux-kernel@vger.kernel.org>, <ben-linux@fluff.org>,
<balbi@ti.com>, <h.feurstein@gmail.com>, <rmallon@gmail.com>,
<adrian.yanes@aalto.fi>, <ludovic.desroches@atmel.com>,
<carsten.behling@garz-fricke.com>
Subject: Re: [PATCH v11 0/4] AT91: replace old i2c-at91.c TWI driver
Date: Wed, 12 Sep 2012 09:59:01 +0200 [thread overview]
Message-ID: <505040C5.4090703@atmel.com> (raw)
In-Reply-To: <cover.1346225321.git.n.voss@weinmann.de>
On 08/29/2012 09:28 AM, Nikolaus Voss :
> The old driver has two main deficencies:
> i) No repeated start (Sr) condiction is possible, this makes it unusable
> e.g. for most SMBus transfers.
> ii) I/O was done with polling/busy waiting what caused over-/underruns
> even at light system loads and clock speeds.
>
> The new driver overcomes these deficencies and in addition allows for
> more than one TWI interface.
>
> A remaining limitation is the fact, that only one repeated start is
> possible (two concatenated messages). This limitation is imposed by
> the hardware. However, this should not be a problem as all common
> i2c-client communication does not rely on more than one repeated start.
>
> Changes since v11:
> - corrected wrong id_entry on sam9261 twi gpio pdev
Hi Wolfram,
Despite the patch revision written in the subject, it is actually the
real v12 patch series from Nikolaus.
BTW, I suspect that you were not in copy...
In addition to the "Tested-By" tag by Ludovic, you can add my:
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> Nikolaus Voss (4):
> drivers/i2c/busses/i2c-at91.c: remove old polling driver
> Replace clk_lookup.con_id with clk_lookup.dev_id entries for twi clk
> drivers/i2c/busses/i2c-at91.c: add new driver
> G45 TWI: remove open drain setting for twi function gpios
>
> arch/arm/mach-at91/at91rm9200.c | 1 +
> arch/arm/mach-at91/at91rm9200_devices.c | 9 +
> arch/arm/mach-at91/at91sam9260.c | 1 +
> arch/arm/mach-at91/at91sam9261.c | 1 +
> arch/arm/mach-at91/at91sam9261_devices.c | 9 +
> arch/arm/mach-at91/at91sam9263.c | 1 +
> arch/arm/mach-at91/at91sam9g45.c | 2 +
> arch/arm/mach-at91/at91sam9g45_devices.c | 6 -
> arch/arm/mach-at91/at91sam9rl.c | 2 +
> arch/arm/mach-at91/at91sam9x5.c | 3 +
> arch/arm/mach-at91/include/mach/at91_twi.h | 68 ----
> drivers/i2c/busses/Kconfig | 11 +-
> drivers/i2c/busses/i2c-at91.c | 591 ++++++++++++++++++----------
> 13 files changed, 418 insertions(+), 287 deletions(-)
> delete mode 100644 arch/arm/mach-at91/include/mach/at91_twi.h
>
--
Nicolas Ferre
next prev parent reply other threads:[~2012-09-12 7:59 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-29 7:28 [PATCH v11 0/4] AT91: replace old i2c-at91.c TWI driver Nikolaus Voss
2012-08-29 7:28 ` Nikolaus Voss
[not found] ` <cover.1346225321.git.n.voss-+umVssTZoCsb1SvskN2V4Q@public.gmane.org>
2011-11-08 10:49 ` [PATCH v11 1/4] drivers/i2c/busses/i2c-at91.c: remove old polling driver Nikolaus Voss
2011-11-08 10:49 ` Nikolaus Voss
2011-11-08 10:49 ` [PATCH v11 3/4] drivers/i2c/busses/i2c-at91.c: add new driver Nikolaus Voss
2011-11-08 10:49 ` Nikolaus Voss
2012-09-12 7:59 ` Nicolas Ferre [this message]
2012-09-12 7:59 ` [PATCH v11 0/4] AT91: replace old i2c-at91.c TWI driver Nicolas Ferre
2012-09-12 7:59 ` Nicolas Ferre
2011-11-08 11:09 ` [PATCH v11 2/4] Replace clk_lookup.con_id with clk_lookup.dev_id entries for twi clk Nikolaus Voss
2011-11-08 11:11 ` [PATCH v11 4/4] G45 TWI: remove open drain setting for twi function gpios Nikolaus Voss
2012-08-29 12:06 ` [PATCH v11 0/4] AT91: replace old i2c-at91.c TWI driver ludovic.desroches
2012-08-29 12:06 ` ludovic.desroches
-- strict thread matches above, loose matches on Subject: below --
2012-08-22 6:59 Nikolaus Voss
2012-08-22 6:59 ` Nikolaus Voss
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