Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1214471

Re: [PATCH v5 2/5] PM / OPP: get the voltage for all OPPs

Show all headers | View raw

On 27-08-15, 11:55, Javi Merino wrote:
> The OPP library is now used for power models to calculate the power
> that a device would consume at a specific OPP.  To do that, we use a
> simple power model which takes frequency and voltage as inputs.  We get
> the voltage and frequency from the OPP library.
> 
> The devfreq cooling device for the thermal framework controls
> temperature by disabling OPPs.  The power model needs to calculate the
> power that would be consumed if we reenabled the OPP.  Therefore, let
> dev_pm_opp_get_voltage() work for disabled OPPs.
> 
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> Cc: Viresh Kumar <viresh.kumar@linaro.org>
> Signed-off-by: Javi Merino <javi.merino@arm.com>
> ---
>  drivers/base/power/opp.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
> index 677fb2843553..3e5f7ae29ef9 100644
> --- a/drivers/base/power/opp.c
> +++ b/drivers/base/power/opp.c
> @@ -150,7 +150,7 @@ static struct device_opp *_find_device_opp(struct device *dev)
>  }
>  
>  /**
> - * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an available opp
> + * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp
>   * @opp:	opp for which voltage has to be returned for
>   *
>   * Return: voltage in micro volt corresponding to the opp, else
> @@ -172,7 +172,7 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
>  	opp_rcu_lockdep_assert();
>  
>  	tmp_opp = rcu_dereference(opp);
> -	if (unlikely(IS_ERR_OR_NULL(tmp_opp)) || !tmp_opp->available)
> +	if (unlikely(IS_ERR_OR_NULL(tmp_opp)))
>  		pr_err("%s: Invalid parameters\n", __func__);
>  	else
>  		v = tmp_opp->u_volt;

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[PATCH v5 2/5] PM / OPP: get the voltage for all OPPs Javi Merino <javi.merino@arm.com> - 2015-08-27 13:00 +0200
  Re: [PATCH v5 2/5] PM / OPP: get the voltage for all OPPs Viresh Kumar <viresh.kumar@linaro.org> - 2015-08-27 13:00 +0200

csiph-web