On Wed, 2009-10-07 at 21:52 +0300, Woodruff, Richard wrote:
> > From: linux-omap-ow...@vger.kernel.org [mailto:linux-omap-
> > ow...@vger.kernel.org] On Behalf Of Kalle Jokiniemi
> > Sent: Friday, October 02, 2009 5:59 AM
>
>
> > Yes, this is a good idea in theory, but the reality of wake-up late
> From: linux-omap-ow...@vger.kernel.org [mailto:linux-omap-
> ow...@vger.kernel.org] On Behalf Of Kalle Jokiniemi
> Sent: Friday, October 02, 2009 5:59 AM
> Yes, this is a good idea in theory, but the reality of wake-up latencies
> kind-a kill this one. Wake-up from even C1 (MPU INA, CORE ON) t
ap@vger.kernel.org; jouni.hogander
> Subject: Re: [PATCH 1/1] OMAP: I2C: Add mpu wake up latency constraint in
> i2c
>
> On Wed, 2009-10-07 at 13:49 +0300, Nishanth Menon wrote:
> > Kalle Jokiniemi said the following on 10/07/2009 05:10 AM:
> > >>> extra delays and subsequent
Kalle Jokiniemi said the following on 10/07/2009 05:10 AM:
>>> extra delays and subsequent re-trys cause i2c clocks
>>> to be active more often. This has also an negative
>>> effect on power consumption.
>>>
>>> Added a constraint that allows MPU to wake up in few
>>> hundred usecs, which is roughl
tember 17, 2009 11:29 AM
> >To: khil...@deeprootsystems.com
> >Cc: jhnik...@gmail.com; linux-omap@vger.kernel.org; Kalle Jokiniemi
> >Subject: [PATCH 1/1] OMAP: I2C: Add mpu wake up latency constraint in i2c
> >
> >While waiting for completion of the i2c transfer, the
> >
ger.kernel.org; Kalle Jokiniemi
>Subject: [PATCH 1/1] OMAP: I2C: Add mpu wake up latency constraint in i2c
>
>While waiting for completion of the i2c transfer, the
>MPU could hit OFF mode and cause several msecs of
>delay that made i2c transfers fail more often. The
How many bytes i2c read we
On Thu, 2009-10-01 at 14:41 +0300, Aaro Koskinen wrote:
> Hello,
>
> Kalle Jokiniemi wrote:
> > On Wed, 2009-09-30 at 19:36 +0300, Kevin Hilman wrote:
> >> Seems like the latency value should also be (optionally) passed in
> >> pdata so this can be experimented with per-platform.
> >
> > Well, it
Kalle Jokiniemi writes:
> On Wed, 2009-09-30 at 19:36 +0300, Kevin Hilman wrote:
>> Kalle Jokiniemi writes:
>>
>> > While waiting for completion of the i2c transfer, the
>> > MPU could hit OFF mode and cause several msecs of
>> > delay that made i2c transfers fail more often. The
>> > extra del
Hello,
Kalle Jokiniemi wrote:
On Wed, 2009-09-30 at 19:36 +0300, Kevin Hilman wrote:
Seems like the latency value should also be (optionally) passed in
pdata so this can be experimented with per-platform.
Well, it kind of is already, since we pass the function that sets the
latency from platf
On Thu, 2009-10-01 at 09:10 +0300, Jarkko Nikula wrote:
> Hi Kalle
>
> Few minor comments below.
>
> On Thu, 17 Sep 2009 19:28:43 +0300
> Kalle Jokiniemi wrote:
>
> > -static u32 i2c_rate[ARRAY_SIZE(i2c_resources)];
> > +static struct omap_i2c_bus_platform_data
> > i2c_pdata[ARRAY_SIZE(i2c_res
On Wed, 2009-09-30 at 19:36 +0300, Kevin Hilman wrote:
> Kalle Jokiniemi writes:
>
> > While waiting for completion of the i2c transfer, the
> > MPU could hit OFF mode and cause several msecs of
> > delay that made i2c transfers fail more often. The
> > extra delays and subsequent re-trys cause i
Hi Kalle
Few minor comments below.
On Thu, 17 Sep 2009 19:28:43 +0300
Kalle Jokiniemi wrote:
> -static u32 i2c_rate[ARRAY_SIZE(i2c_resources)];
> +static struct omap_i2c_bus_platform_data
> i2c_pdata[ARRAY_SIZE(i2c_resources)];
> static struct platform_device omap_i2c_devices[] = {
> - I2
Kalle Jokiniemi writes:
> While waiting for completion of the i2c transfer, the
> MPU could hit OFF mode and cause several msecs of
> delay that made i2c transfers fail more often. The
> extra delays and subsequent re-trys cause i2c clocks
> to be active more often. This has also an negative
> ef
While waiting for completion of the i2c transfer, the
MPU could hit OFF mode and cause several msecs of
delay that made i2c transfers fail more often. The
extra delays and subsequent re-trys cause i2c clocks
to be active more often. This has also an negative
effect on power consumption.
Added a co
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