linux-kernel - Re: [PATCH] ARM: multi_v7_defconfig: switch CONFIG_PWM

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Message-ID: <7hh8g0d8tg.fsf@baylibre.com>
Date:   Wed, 28 Nov 2018 16:30:19 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-amlogic@...ts.infradead.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux@...linux.org.uk,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: Re: [PATCH] ARM: multi_v7_defconfig: switch CONFIG_PWM_MESON to built-in

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

> Some Meson8b boards (Odroid-C1, EC-100) use a PWM regulator which is the
> voltage supply of the CPU cores (this regulator is typically called
> "VCCK").
> Now that we are preparing support for CPU frequency scaling on Meson8,
> Meson8b and Meson8m2 we should build the pwm-meson driver into the
> kernel so we can configure the CPU voltage early in the boot process.

Can you explain a little more why the configuration of CPU voltage
cannot wait a bit so this could be properly probed?

Kevin