Messages in this thread | | | From | Shenwei Wang <> | Subject | RE: [PATCH 1/2] dt-bindings: power: Add regulator-pd yaml file | Date | Fri, 18 Aug 2023 21:06:16 +0000 |
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> -----Original Message----- > From: Rob Herring <robh+dt@kernel.org> > Sent: Friday, August 18, 2023 3:52 PM > To: Shenwei Wang <shenwei.wang@nxp.com> > Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>; Conor Dooley > <conor+dt@kernel.org>; Ulf Hansson <ulf.hansson@linaro.org>; Liam Girdwood > <lgirdwood@gmail.com>; Mark Brown <broonie@kernel.org>; > imx@lists.linux.dev; devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; > dl-linux-imx <linux-imx@nxp.com> > Subject: [EXT] Re: [PATCH 1/2] dt-bindings: power: Add regulator-pd yaml file > > > > Documenting the regulator power domain properties and usage examples. > > This needs to answer why we need this. > > It looks like just an abstraction layer to make regulators look like a power > domain. >
Yes, it is a wrapper that allows using regulators as a power domain. This removes the need to add regulator operating code in each consumer device driver. As a power domain, the regulator will be managed automatically by the device driver framework and PM subsystem.
This is very useful when a device's power is controlled by a GPIO pin, which currently requires using the fixed-regulator to achieve the same purpose. However, the fixed-regulator approach may have to add code in the driver in order to use it.
Thanks, Shenwei
> Rob
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