linux-kernel - Re: [Letux-kernel] [RFC PATCH 0/3] Enable 1GHz support on omap36xx

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Date:   Tue, 10 Sep 2019 21:55:32 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Adam Ford <aford173@...il.com>
Cc:     Tony Lindgren <tony@...mide.com>,
        André Roth <neolynx@...il.com>,
        Linux-OMAP <linux-omap@...r.kernel.org>,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andreas Kemnade <andreas@...nade.info>,
        Nishanth Menon <nm@...com>
Subject: Re: [Letux-kernel] [RFC PATCH 0/3] Enable 1GHz support on omap36xx

Ok,

> Am 10.09.2019 um 20:51 schrieb H. Nikolaus Schaller <hns@...delico.com>:
> 
>>>> it, but then I got some nasty errors and crashes.
>>> 
>>> I have done the same but not (yet) seen a crash or error. Maybe you had
>>> a typo?
>> 
>> Can you send me an updated patch?  I'd like to try to get where you
>> are that doesn't crash.
> 
> Yes, as soon as I have access.

it turns out that my patch breaks cpufreq completely...
So it looks as if *I* have a typo :)

Hence I am likely running at constant speed and the
VDD1 regulator is fixed a 1.200V.

root@...ux:~# dmesg|fgrep opp
[    2.426208] cpu cpu0: opp_parse_supplies: Invalid number of elements in opp-microvolt property (6) with supplies (1)
[    2.438140] cpu cpu0: _of_add_opp_table_v2: Failed to add OPP, -22
root@...ux:~# cat /sys/class/regulator/regulator.8/microvolts 
1200000
root@...ux:~# 

The error message looks as if we have to enable multi_regulator.
And that may need to rename cpu0-supply to vdd-supply (unless the
names can be configured).

BR,
Nikolaus