linux-kernel - [PATCH 0/2] regulator: vctrl: Avoid lockdep warning in enable/disable ops

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Date:   Wed, 25 Aug 2021 11:37:02 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>
Cc:     Chen-Yu Tsai <wenst@...omium.org>,
        Brian Norris <briannorris@...omium.org>,
        linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 0/2] regulator: vctrl: Avoid lockdep warning in enable/disable ops

Hi,

Here are a couple fixes for vctrl-regulator. This driver is only used
RK3399-based Chromebooks.

Patch one fixes a misuse of the regulator API, which was found while
tracing the code to fix the lockdep warning.

Patch two fixes a lockdep warning and actual (not easy to reproduce)
deadlock.

Please have a look. The are no dependencies between the two patches.

Additionally, I believe it would make sense to implement the voltage
stepping feature for all regulators in the core. Then we could move
away from vctrl-regulator. Right now it is only done for coupled
regulators.

Regards
ChenYu

Chen-Yu Tsai (2):
  regulator: vctrl: Use locked regulator_get_voltage in probe path
  regulator: vctrl: Avoid lockdep warning in enable/disable ops

 drivers/regulator/vctrl-regulator.c | 73 +++++++++++++++++------------
 1 file changed, 43 insertions(+), 30 deletions(-)

-- 
2.33.0.rc2.250.ged5fa647cd-goog