linux-kernel - Re: [PATCH] arm: dts: fix rk3066a based boards vdd

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Date:   Mon, 19 Sep 2016 10:52:51 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:     Heiko Stuebner <heiko@...ech.de>,
        Andy Yan <andy.yan@...k-chips.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] arm: dts: fix rk3066a based boards vdd_log voltage initialization

Hi,

On Mon, Sep 19, 2016 at 10:48 AM, Boris Brezillon
<boris.brezillon@...e-electrons.com> wrote:
> The PWM chip has always claimed the pins and muxed them to the PWM IP.
> So, this means it's broken from the beginning, and my patch is only
> uncovering the problem (unless the pins stay configured as input until
> the PWM is enabled, which I'm not sure is the case).

Such a solution is achievable with the pinctrl APIs pretty easily.
You might not be able to use the automatic "init" state but you can do
something similar and switch to an "active" state once the PWM is
actually turned on the first time.

-Doug