Re: [PATCH 2/3] fpga: region: Add fpga-region property 'power-domains'

Moritz Fischer
2021-04-02T17:15:43Z

On Fri, Apr 02, 2021 at 02:50:48PM +0530, Nava kishore Manne wrote:
> Add fpga-region property 'power-domains' to allow to handle
> the FPGA/PL power domins.
>
> dt-bindings: fpga: Enable PM generic domain support
>
> Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com>
> ---
> .../devicetree/bindings/fpga/fpga-region.txt | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/fpga/fpga-region.txt b/Documentation/devicetree/bindings/fpga/fpga-region.txt
> index e811cf825019..969ca53bb65e 100644
> --- a/Documentation/devicetree/bindings/fpga/fpga-region.txt
> +++ b/Documentation/devicetree/bindings/fpga/fpga-region.txt
> @@ -196,6 +196,20 @@ Optional properties:
> - config-complete-timeout-us : The maximum time in microseconds time for the
> FPGA to go to operating mode after the region has been programmed.
> - child nodes : devices in the FPGA after programming.
> +- power-domains : A phandle and PM domain specifier as defined by bindings of
> + the power controller specified by phandle.
> +Example:
> + fpga_full: fpga-full {
> + compatible = "fpga-region";
> + fpga-mgr = <&zynqmp_pcap>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> + power-domains = <&zynqmp_firmware PL_PD>;
> + };
> +
> + The PL_PD power domain will be turned on before loading the bitstream
> +and turned off while removing/unloading the bitstream using overlays.

Can multiple regions share a power-domain or is this specific to full
fpga reconfiguration?

- Moritz