linux-kernel - Re: [PATCH V2] cpufreq: powernv: Add boost files to export ultra-turbo frequencies

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Message-ID: <20170103110859.GB14137@vireshk-i7>
Date:   Tue, 3 Jan 2017 16:38:59 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>
Cc:     rjw@...ysocki.net, ego@...ux.vnet.ibm.com,
        akshay.adiga@...ux.vnet.ibm.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        svaidy@...ux.vnet.ibm.com
Subject: Re: [PATCH V2] cpufreq: powernv: Add boost files to export
 ultra-turbo frequencies

On 03-01-17, 16:36, Shilpasri G Bhat wrote:
> In P8+, Workload Optimized Frequency(WOF) provides the capability to
> boost the cpu frequency based on the utilization of the other cpus
> running in the chip. The On-Chip-Controller(OCC) firmware will control
> the achievability of these frequencies depending on the power headroom
> available in the chip. Currently the ultra-turbo frequencies provided
> by this feature are exported along with the turbo and sub-turbo
> frequencies as scaling_available_frequencies. This patch will export
> the ultra-turbo frequencies separately as scaling_boost_frequencies in
> WOF enabled systems. This patch will add the boost sysfs file which
> can be used to disable/enable ultra-turbo frequencies.
> 
> Signed-off-by: Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>
> Reviewed-by: Gautham R. Shenoy <ego@...ux.vnet.ibm.com>
> ---
> Changes from v1:
> - Print if WOF is enabled
> - s/clean_notifiers/cleanup_notifiers
> 
>  drivers/cpufreq/powernv-cpufreq.c | 50 ++++++++++++++++++++++++++++++++++++---
>  1 file changed, 47 insertions(+), 3 deletions(-)

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

-- 
viresh