Re: [PATCH] ARM: OMAP2+: Fix warnings with broken omap2_set_init_voltage()

H. Nikolaus Schaller
2019-12-06T18:34:44Z

> Am 06.12.2019 um 19:20 schrieb Tony Lindgren <tony@atomide.com>:
>
> * H. Nikolaus Schaller <hns@goldelico.com> [191203 16:55]:
>>> What we could do is augment the printk (or dev_err) to tell
>>> in these warnings what it is looking for...
>>>
>>> opp = dev_pm_opp_find_freq_ceil(dev, &freq);
>>> if (IS_ERR(opp)) {
>>> pr_err("%s: unable to find boot up OPP for vdd_%s freq %ulHz\n",
>>> __func__, vdd_name, freq);
>>> goto exit;
>>> }
>>
>> Easier and always prints info:
>>
>> freq = clk_get_rate(clk);
>> clk_put(clk);
>>
>> pr_info("%s: vdd=%s clk=%s %luHz oh=%s\n", __func__, vdd_name, clk_name, freq, oh_name);
>>
>> opp = dev_pm_opp_find_freq_ceil(dev, &freq);
>>
>> I get this:
>>
>> [ 2.908142] omap2_set_init_voltage: vdd=mpu_iva clk=dpll1_ck 1000000000Hz oh=mpu
>> [ 2.930816] omap2_set_init_voltage: vdd=core clk=l3_ick 200000000Hz oh=l3_main
>> [ 2.946228] omap2_set_init_voltage: unable to find boot up OPP for vdd_core
>> [ 2.953460] omap2_set_init_voltage: unable to set vdd_core
>
> OK yeah that's more descriptive.

So what does your board say as it is also unable to find the initial mpu_iva?
And/or does it show a different core clock?

>
>> Which means that cpufreq already has increased dpll1_ck to 1 GHz
>> (I have removed the turbo-mode tags so that it already boots at
>> full speed) and l3_ick runs at initial 200 MHz.
>
> OK. I wonder where this initial code should live though..

Well, we all agree that it should live in deserved retirement :)

But it has some positive effect and maybe "fixes" a bug in cpufreq-only setup.

BR,
Nikolaus