2013-03-27 22:46:48

by Guennadi Liakhovetski

[permalink] [raw]
Subject: Re: [PATCH] cpufreq: cpufreq-cpu0: use the exact frequency for clk_set_rate()

Hi Shawn

On Mon, 25 Feb 2013, Guennadi Liakhovetski wrote:

> clk_set_rate() isn't supposed to accept approximate frequencies, instead
> a supported frequency should be obtained from clk_round_rate() and then
> used to set the clock.
>
> Signed-off-by: Guennadi Liakhovetski <[email protected]>

Can I have your ack for this one, please?

Thanks
Guennadi

> ---
>
> Applies on top of my previous patch to fix unsigned freq_Hz "cpufreq: fix
> sign check of an unsigned variable in cpufreq-cpu0"
>
> drivers/cpufreq/cpufreq-cpu0.c | 5 +++--
> 1 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
> index e7bad3c..6ce9b51 100644
> --- a/drivers/cpufreq/cpufreq-cpu0.c
> +++ b/drivers/cpufreq/cpufreq-cpu0.c
> @@ -45,7 +45,7 @@ static int cpu0_set_target(struct cpufreq_policy *policy,
> struct cpufreq_freqs freqs;
> struct opp *opp;
> unsigned long volt = 0, volt_old = 0, tol = 0;
> - long freq_Hz;
> + long freq_Hz, freq_exact;
> unsigned int index, cpu;
> int ret;
>
> @@ -60,6 +60,7 @@ static int cpu0_set_target(struct cpufreq_policy *policy,
> freq_Hz = clk_round_rate(cpu_clk, freq_table[index].frequency * 1000);
> if (freq_Hz < 0)
> freq_Hz = freq_table[index].frequency * 1000;
> + freq_exact = freq_Hz;
> freqs.new = freq_Hz / 1000;
> freqs.old = clk_get_rate(cpu_clk) / 1000;
>
> @@ -96,7 +97,7 @@ static int cpu0_set_target(struct cpufreq_policy *policy,
> }
> }
>
> - ret = clk_set_rate(cpu_clk, freqs.new * 1000);
> + ret = clk_set_rate(cpu_clk, freq_exact);
> if (ret) {
> pr_err("failed to set clock rate: %d\n", ret);
> if (cpu_reg)
> --
> 1.7.2.5
>
>

---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/


2013-03-28 02:07:45

by Shawn Guo

[permalink] [raw]
Subject: Re: [PATCH] cpufreq: cpufreq-cpu0: use the exact frequency for clk_set_rate()

On Wed, Mar 27, 2013 at 11:46:38PM +0100, Guennadi Liakhovetski wrote:
> Hi Shawn
>
> On Mon, 25 Feb 2013, Guennadi Liakhovetski wrote:
>
> > clk_set_rate() isn't supposed to accept approximate frequencies, instead
> > a supported frequency should be obtained from clk_round_rate() and then
> > used to set the clock.
> >
> > Signed-off-by: Guennadi Liakhovetski <[email protected]>
>
> Can I have your ack for this one, please?

Acked-by: Shawn Guo <[email protected]>

2013-05-22 18:12:31

by Guennadi Liakhovetski

[permalink] [raw]
Subject: Re: [PATCH] cpufreq: cpufreq-cpu0: use the exact frequency for clk_set_rate()

Hi Rafael

I don't see this patch in your cpufreq branch nor in next or Linus' trees,
has it been pulled yet?

Thanks
Guennadi

On Thu, 28 Mar 2013, Shawn Guo wrote:

> On Wed, Mar 27, 2013 at 11:46:38PM +0100, Guennadi Liakhovetski wrote:
> > Hi Shawn
> >
> > On Mon, 25 Feb 2013, Guennadi Liakhovetski wrote:
> >
> > > clk_set_rate() isn't supposed to accept approximate frequencies, instead
> > > a supported frequency should be obtained from clk_round_rate() and then
> > > used to set the clock.
> > >
> > > Signed-off-by: Guennadi Liakhovetski <[email protected]>
> >
> > Can I have your ack for this one, please?
>
> Acked-by: Shawn Guo <[email protected]>
>

---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/

2013-05-22 19:22:42

by Rafael J. Wysocki

[permalink] [raw]
Subject: Re: [PATCH] cpufreq: cpufreq-cpu0: use the exact frequency for clk_set_rate()

On Wednesday, May 22, 2013 08:12:22 PM Guennadi Liakhovetski wrote:
> Hi Rafael
>
> I don't see this patch in your cpufreq branch nor in next or Linus' trees,
> has it been pulled yet?

No, I haven't applied it yet, not sure why exactly.

In the future it's better to CC cpufreq patches to [email protected] so
that the kernel.org Patchwork can pick them up. I'm much less likely to
overlook them then.

This is a fix, so do we need it in 3.10-rc?

Rafael


> On Thu, 28 Mar 2013, Shawn Guo wrote:
>
> > On Wed, Mar 27, 2013 at 11:46:38PM +0100, Guennadi Liakhovetski wrote:
> > > Hi Shawn
> > >
> > > On Mon, 25 Feb 2013, Guennadi Liakhovetski wrote:
> > >
> > > > clk_set_rate() isn't supposed to accept approximate frequencies, instead
> > > > a supported frequency should be obtained from clk_round_rate() and then
> > > > used to set the clock.
> > > >
> > > > Signed-off-by: Guennadi Liakhovetski <[email protected]>
> > >
> > > Can I have your ack for this one, please?
> >
> > Acked-by: Shawn Guo <[email protected]>
> >
>
> ---
> Guennadi Liakhovetski, Ph.D.
> Freelance Open-Source Software Developer
> http://www.open-technology.de/
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.

2013-06-05 11:25:42

by Guennadi Liakhovetski

[permalink] [raw]
Subject: Re: [PATCH] cpufreq: cpufreq-cpu0: use the exact frequency for clk_set_rate()

Hi Rafael

On Wed, 22 May 2013, Rafael J. Wysocki wrote:

> On Wednesday, May 22, 2013 08:12:22 PM Guennadi Liakhovetski wrote:
> > Hi Rafael
> >
> > I don't see this patch in your cpufreq branch nor in next or Linus' trees,
> > has it been pulled yet?
>
> No, I haven't applied it yet, not sure why exactly.
>
> In the future it's better to CC cpufreq patches to [email protected] so
> that the kernel.org Patchwork can pick them up. I'm much less likely to
> overlook them then.
>
> This is a fix, so do we need it in 3.10-rc?

Would be good, yes.

Thanks
Guennadi

>
> Rafael
>
>
> > On Thu, 28 Mar 2013, Shawn Guo wrote:
> >
> > > On Wed, Mar 27, 2013 at 11:46:38PM +0100, Guennadi Liakhovetski wrote:
> > > > Hi Shawn
> > > >
> > > > On Mon, 25 Feb 2013, Guennadi Liakhovetski wrote:
> > > >
> > > > > clk_set_rate() isn't supposed to accept approximate frequencies, instead
> > > > > a supported frequency should be obtained from clk_round_rate() and then
> > > > > used to set the clock.
> > > > >
> > > > > Signed-off-by: Guennadi Liakhovetski <[email protected]>
> > > >
> > > > Can I have your ack for this one, please?
> > >
> > > Acked-by: Shawn Guo <[email protected]>

---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/

2013-06-05 12:06:29

by Rafael J. Wysocki

[permalink] [raw]
Subject: Re: [PATCH] cpufreq: cpufreq-cpu0: use the exact frequency for clk_set_rate()

On Wednesday, June 05, 2013 01:25:37 PM Guennadi Liakhovetski wrote:
> Hi Rafael
>
> On Wed, 22 May 2013, Rafael J. Wysocki wrote:
>
> > On Wednesday, May 22, 2013 08:12:22 PM Guennadi Liakhovetski wrote:
> > > Hi Rafael
> > >
> > > I don't see this patch in your cpufreq branch nor in next or Linus' trees,
> > > has it been pulled yet?
> >
> > No, I haven't applied it yet, not sure why exactly.
> >
> > In the future it's better to CC cpufreq patches to [email protected] so
> > that the kernel.org Patchwork can pick them up. I'm much less likely to
> > overlook them then.
> >
> > This is a fix, so do we need it in 3.10-rc?
>
> Would be good, yes.

OK, queued up for 3.10.

Thanks,
Rafael


> > > On Thu, 28 Mar 2013, Shawn Guo wrote:
> > >
> > > > On Wed, Mar 27, 2013 at 11:46:38PM +0100, Guennadi Liakhovetski wrote:
> > > > > Hi Shawn
> > > > >
> > > > > On Mon, 25 Feb 2013, Guennadi Liakhovetski wrote:
> > > > >
> > > > > > clk_set_rate() isn't supposed to accept approximate frequencies, instead
> > > > > > a supported frequency should be obtained from clk_round_rate() and then
> > > > > > used to set the clock.
> > > > > >
> > > > > > Signed-off-by: Guennadi Liakhovetski <[email protected]>
> > > > >
> > > > > Can I have your ack for this one, please?
> > > >
> > > > Acked-by: Shawn Guo <[email protected]>
>
> ---
> Guennadi Liakhovetski, Ph.D.
> Freelance Open-Source Software Developer
> http://www.open-technology.de/
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.