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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, 2024-04-17 at 10:14 +0200, AngeloGioacchino Del Regno wrote: > > > Upstream supports platforms that do and don't need this feature, and > having > redundant device tree properties performing the same checks is not > just > suboptimal but plain wrong. > > Adding to this, devicetree describes the hardware - and there is no > physical > hardware switch that needs this redundant property, this means that > the > property that is getting removed in this commit (and the va09 one in > another > commit of this series) is a *software switch*, not HW. > > Keep in mind, also, that this feature (and again, the va09 one as > well) has > a specific requirement to be supported - and this is what the code > does even > without the software switch to add it. > > In case there's any need to disallow such feature from a specific > SoC, the DT > bindings can be modified such that a specific compatible string would > disallow > adding the required regulator and/or boost-microvolt properties. > > Besides, I want to remind you that there is no reason to drop > support, or have > them unreliably working, or use hacks, for SoCs that are "old" - > especially > when this is a driver that works on both old and new ones. > > Regards, > Angelo Hi Angelo, These two property(boost and va09) is not software switch, they are hardware switch. Because if platform support crypto boost, we set boost property in device tree. And if platform support ufs va09, we set va09 proberty in device tree. These property are main hardware switch. We don't use sub switch like voltage or clock setting becasue it is not intiutive. Especially when va09 is not used by ufs (No va09 property but have va09 voltage), The behavior should be wrong if ufs control va09 which used by other module. Thanks. Peter _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel