linux-kernel - Re: [PATCH] Revert "thermal: rockchip: fix up the tsadc pinctrl setting error"

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Date:   Wed, 22 May 2019 08:34:34 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Eduardo Valentin <edubezval@...il.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        zhangqing <zhangqing@...k-chips.com>,
        Enric Balletbo Serra <eballetbo@...il.com>,
        Brian Norris <briannorris@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: Re: [PATCH] Revert "thermal: rockchip: fix up the tsadc pinctrl
 setting error"

Hi,

On Wed, May 22, 2019 at 7:12 AM Heiko Stuebner <heiko@...ech.de> wrote:
>
> This reverts commit 28694e009e512451ead5519dd801f9869acb1f60.
>
> The commit causes multiple issues in that:
> - the added call to ->control does potentially run unclocked
>   causing a hang of the machine
> - the added pinctrl-states are undocumented in the binding
> - the added pinctrl-states are not backwards compatible, breaking
>   old devicetrees.
>
> Fixes: 28694e009e51 ("thermal: rockchip: fix up the tsadc pinctrl setting error")
> Signed-off-by: Heiko Stuebner <heiko@...ech.de>
> ---
>  drivers/thermal/rockchip_thermal.c | 36 +++---------------------------
>  1 file changed, 3 insertions(+), 33 deletions(-)

In case it helps with the urgency, there are lots of people who have
all independently needed to identify which commit stopped their boards
from booting mainline or broke temperature reading.  I'm aware of at
least these reports:

Reported-by: kernelci.org bot <bot@...nelci.org>
Reported-by: Enric Balletbo Serra <eballetbo@...il.com>
Reported-by: Vicente Bergas <vicencb@...il.com>
Reported-by: Jack Mitchell <ml@...ed.me.uk>
Reported-by: Douglas Anderson <dianders@...omium.org>

I can confirm that my board boots again after this revert, thus:

Tested-by: Douglas Anderson <dianders@...omium.org>