Re: [PATCH v2] cpufreq: qcom: Read voltage LUT and populate OPP

Taniya Das
2019-01-17T07:06:07Z

Hello Viresh,

On 1/9/2019 2:24 PM, Viresh Kumar wrote:
> On 09-01-19, 13:37, Taniya Das wrote:
>> @@ -98,6 +107,8 @@ static int qcom_cpufreq_hw_read_lut(struct device *dev,
>
> You are only using this "dev" parameter for dev_dbg(), instead of that
> pass cpu_dev pointer.
>

Sure, will clean it up to use cpu_dev.

>> table[i].frequency = CPUFREQ_ENTRY_INVALID;
>> } else {
>> table[i].frequency = freq;
>> + dev_pm_opp_add(get_cpu_device(policy->cpu),
>> + freq * 1000, volt);
>> dev_dbg(dev, "index=%d freq=%d, core_count %d\n", i,
>> freq, core_count);
>> }
>> @@ -116,6 +127,8 @@ static int qcom_cpufreq_hw_read_lut(struct device *dev,
>> if (prev_cc != max_cores) {
>> prev->frequency = prev_freq;
>> prev->flags = CPUFREQ_BOOST_FREQ;
>> + dev_pm_opp_add(get_cpu_device(policy->cpu),
>> + prev_freq * 1000, volt);
>> }
>>
>> break;
>> @@ -127,6 +140,7 @@ static int qcom_cpufreq_hw_read_lut(struct device *dev,
>>
>> table[i].frequency = CPUFREQ_TABLE_END;
>> policy->freq_table = table;
>> + dev_pm_opp_set_sharing_cpus(get_cpu_device(policy->cpu), policy->cpus);
>
> and then all the above sites can be simplified a bit.
>
>> return 0;
>> }
>> @@ -159,10 +173,18 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
>> struct device *dev = &global_pdev->dev;
>> struct of_phandle_args args;
>> struct device_node *cpu_np;
>> + struct device *cpu_dev;
>> struct resource *res;
>> void __iomem *base;
>> int ret, index;
>>
>> + cpu_dev = get_cpu_device(policy->cpu);
>> + if (!cpu_dev) {
>> + pr_err("%s: failed to get cpu%d device\n", __func__,
>> + policy->cpu);
>> + return -ENODEV;
>> + }
>> +
>> cpu_np = of_cpu_device_node_get(policy->cpu);
>> if (!cpu_np)
>> return -EINVAL;
>> @@ -205,6 +227,12 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
>> goto error;
>> }
>>
>> + ret = dev_pm_opp_get_opp_count(cpu_dev);
>> + if (ret <= 0) {
>> + dev_err(cpu_dev, "OPP table is not ready\n");
>
> Rather say "Failed to add OPPs\n".
>

Sure will update it.

>> + goto error;
>> + }
>> +
>> policy->fast_switch_possible = true;
>>
>> return 0;
>> @@ -217,6 +245,7 @@ static int qcom_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy)
>> {
>> void __iomem *base = policy->driver_data - REG_PERF_STATE;
>>
>> + dev_pm_opp_remove_all_dynamic(&global_pdev->dev);
>
> This is platform device's device structure, while you added the OPPs
> using cpu_dev. You sure this will work ?
>

Hmm, yeah, would update it in the next patch.

>> kfree(policy->freq_table);
>> devm_iounmap(&global_pdev->dev, base);
>>
>> --
>> Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc.is a member
>> of the Code Aurora Forum, hosted by the Linux Foundation.
>

--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation.

--