linux-kernel - Re: [PATCH 0/4] ARM: dts: meson8b: add VDDEE / mali-supply

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Message-ID: <7hd0jh46fr.fsf@baylibre.com>
Date:   Thu, 13 Jun 2019 12:43:36 -0700
From:   Kevin Hilman <khilman@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] ARM: dts: meson8b: add VDDEE / mali-supply

Martin Blumenstingl <martin.blumenstingl@...glemail.com> writes:

> On Wed, Jun 12, 2019 at 1:32 AM Kevin Hilman <khilman@...libre.com> wrote:
>>
>> Martin Blumenstingl <martin.blumenstingl@...glemail.com> writes:
>>
>> > EC-100 and Odroid-C1 use a "copy" of the VCCK regulator as "VDDEE"
>> > regulator. VDDEE supplies the Mali GPU and various other bits within
>> > the SoC.
>> >
>> > The VDDEE regulator is not exclusive to the Mali GPU so it must not
>> > change it's voltage. The GPU OPP table has a fixed voltage for all
>> > frequencies of 1.10V. This matches with what u-boot sets on my EC-100
>> > and Odroid-C1.
>> >
>> > Dependencies:
>> > - compile time: patch #4 depends on my other patch "ARM: meson8b-mxq:
>> >   better support for the TRONFY MXQ" from [0]
>> > - runtime: we don't want the kernel to change the output of the VDDEE
>> >   regulator to the maximum value. Thus the PWM driver has to be able
>> >   to read the PWM period and duty cycle from u-boot. This is supported
>> >   with my series called "pwm-meson: cleanups and improvements" from [1]
>>
>> Just FYI... unless I hear otherwise, I'll wait for the PWM cleanups to
>> land before queuing this series.
>
> I'm happy with that because I'm not sure what will happen *without*
> the PWM improvements

OK, then I'll rely on you to ping (or resend) on this series to remind
me when the PWM stuff has landed.

Thanks,

Kevin