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

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Message-ID: <CAFBinCAVqBxiRz+Fw5D+8XEPTxP13O35OhSD0pEzKjFcGK1H=A@mail.gmail.com>
Date:   Wed, 12 Jun 2019 21:09:51 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Kevin Hilman <khilman@...libre.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

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


Martin