> -----Original Message----- > From: Rob Herring <robh+dt@xxxxxxxxxx> > Sent: Friday, August 18, 2023 3:52 PM > To: Shenwei Wang <shenwei.wang@xxxxxxx> > Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>; Conor Dooley > <conor+dt@xxxxxxxxxx>; Ulf Hansson <ulf.hansson@xxxxxxxxxx>; Liam Girdwood > <lgirdwood@xxxxxxxxx>; Mark Brown <broonie@xxxxxxxxxx>; > imx@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > dl-linux-imx <linux-imx@xxxxxxx> > 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
