[PATCH net-next 2/2] net: macb: Add zynqmp SGMII dynamic configuration support

[Pandey, Radhey Shyam]

> -----Original Message-----
> From: Andrew Lunn <andrew at lunn.ch>
> Sent: Sunday, July 24, 2022 10:24 PM
> To: Pandey, Radhey Shyam <radhey.shyam.pandey at amd.com>
> Cc: michal.simek at xilinx.com; nicolas.ferre at microchip.com;
> claudiu.beznea at microchip.com; davem at davemloft.net;
> edumazet at google.com; kuba at kernel.org; pabeni at redhat.com;
> gregkh at linuxfoundation.org; ronak.jain at xilinx.com; linux-arm-
> kernel at lists.infradead.org; linux-kernel at vger.kernel.org;
> netdev at vger.kernel.org; git at xilinx.com; git (AMD-Xilinx) <git at amd.com>
> Subject: Re: [PATCH net-next 2/2] net: macb: Add zynqmp SGMII dynamic
> configuration support
> 
> > +		ret = of_property_read_u32_array(pdev->dev.of_node,
> "power-domains",
> > +						 pm_info,
> ARRAY_SIZE(pm_info));
> > +		if (ret < 0) {
> > +			dev_err(&pdev->dev, "Failed to read power
> management information\n");
> > +			return ret;
> > +		}
> > +		ret = zynqmp_pm_set_gem_config(pm_info[1],
> GEM_CONFIG_FIXED, 0);
> > +		if (ret < 0)
> > +			return ret;
> > +
> 
> Documentation/devicetree/bindings/net/cdns,macb.yaml says:
> 
>   power-domains:
>     maxItems: 1
> 
> Yet you are using pm_info[1]?

>From power-domain description - It's a phandle and PM domain 
specifier as defined by bindings of the power controller specified
by phandle.

I assume the numbers of cells is specified by "#power-domain-cells":
Power-domain-cell is set to 1 in this case.

arch/arm64/boot/dts/xilinx/zynqmp.dtsi
#power-domain-cells = <1>;
power-domains = <&zynqmp_firmware PD_ETH_0>;

Please let me know your thoughts.

> 
>     Andrew