On Fri, Jan 06, 2023 at 12:07:55PM -0800, William Zhang wrote: > brcm,no-clk-gate is a Broadcom Broadband HS SPI controller specific > property for certain SPI device such as Broadcom ISI voice daughtercard > to work properly. It disables the clock gating feature when the chip > select is deasserted for any device that wants to keep the clock > running. Why would this property be Broadcom specific? Other devices could in theory implement this. > +properties: > + brcm,no-clk-gate: > + $ref: /schemas/types.yaml#/definitions/flag > + description: > + Some SPI device such as Broadcom ISI based voice daughtercard requires SPI > + clock running even when chip select is deasserted. By default the > + controller turns off or gate the clock when cs is not active to save > + power. This flag tells the controller driver to keep the clock running > + when chip select is not active. This seems problematic with any host controlled chip select support...
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