linux-kernel - Re: [PATCH v5 19/20] cpufreq: add support for CPU DVFS based on SCMI message protocol

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Message-ID: <1f04bbaf-83ae-6351-dbc9-82d27af030e1@arm.com>
Date:   Thu, 22 Feb 2018 09:48:06 +0000
From:   Sudeep Holla <sudeep.holla@....com>
To:     Quentin Perret <quentin.perret@....com>
Cc:     Sudeep Holla <sudeep.holla@....com>,
        ALKML <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Alexey Klimov <klimov.linux@...il.com>,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v5 19/20] cpufreq: add support for CPU DVFS based on SCMI
 message protocol



On 22/02/18 09:04, Quentin Perret wrote:
> Hi Sudeep,
> 
> On Monday 12 Feb 2018 at 18:45:23 (+0000), Sudeep Holla wrote:
> [...]
>> +/*
>> + * perf_ops->freq_set is not a synchronous, the actual OPP change will
>> + * happen asynchronously and can get notified if the events are
>> + * subscribed for by the SCMI firmware
>> + */
>> +static int
>> +scmi_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int index)
>> +{
>> +	struct scmi_data *priv = policy->driver_data;
>> +	struct scmi_perf_ops *perf_ops = handle->perf_ops;
>> +	u64 freq = policy->freq_table[index].frequency * 1000;
>> +
>> +	return perf_ops->freq_set(handle, priv->domain_id, freq, false);
>> +}
> 
> Is arch_set_freq_scale() needed in this function ?
> 

Yes indeed, already added locally[1] after Dietmar started the discussion.

-- 
Regards,
Sudeep

[1] https://git.kernel.org/sudeep.holla/linux/h/for-list/new_arm_scmi