linux-kernel - Re: [PATCH v2 6/7] arm64: dts: zynqmp: Move USB clocks to dwc3 node

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Date:   Thu, 20 Jan 2022 16:56:25 +0000
From:   Robert Hancock <robert.hancock@...ian.com>
To:     "sean.anderson@...o.com" <sean.anderson@...o.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "bjagadee@...eaurora.org" <bjagadee@...eaurora.org>,
        "Thinh.Nguyen@...opsys.com" <Thinh.Nguyen@...opsys.com>,
        "michal.simek@...inx.com" <michal.simek@...inx.com>,
        "baruch@...s.co.il" <baruch@...s.co.il>,
        "balbi@...nel.org" <balbi@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 6/7] arm64: dts: zynqmp: Move USB clocks to dwc3 node

On Tue, 2022-01-18 at 19:24 -0500, Sean Anderson wrote:
> These clocks are not used by the dwc3-xilinx driver except to
> enable/disable them. Move them to the dwc3 node so its driver can use
> them to configure the reference clock period.
> 
> Signed-off-by: Sean Anderson <sean.anderson@...o.com>
> ---
> 
> (no changes since v1)
> 
>  arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi | 4 ++--
>  arch/arm64/boot/dts/xilinx/zynqmp.dtsi         | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi
> b/arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi
> index 1e0b1bca7c94..8493dd7d5f1f 100644
> --- a/arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi
> +++ b/arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi
> @@ -223,11 +223,11 @@ &uart1 {
>  	clocks = <&zynqmp_clk UART1_REF>, <&zynqmp_clk LPD_LSBUS>;
>  };
>  
> -&usb0 {
> +&dwc3_0 {
>  	clocks = <&zynqmp_clk USB0_BUS_REF>, <&zynqmp_clk USB3_DUAL_REF>;
>  };
>  
> -&usb1 {
> +&dwc3_1 {
>  	clocks = <&zynqmp_clk USB1_BUS_REF>, <&zynqmp_clk USB3_DUAL_REF>;
>  };
>  
> diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> index 74e66443e4ce..ba68fb8529ee 100644
> --- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> +++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> @@ -811,7 +811,6 @@ usb0: usb@...d0000 {
>  			status = "disabled";
>  			compatible = "xlnx,zynqmp-dwc3";
>  			reg = <0x0 0xff9d0000 0x0 0x100>;
> -			clock-names = "bus_clk", "ref_clk";
>  			power-domains = <&zynqmp_firmware PD_USB_0>;
>  			resets = <&zynqmp_reset ZYNQMP_RESET_USB0_CORERESET>,
>  				 <&zynqmp_reset ZYNQMP_RESET_USB0_HIBERRESET>,
> @@ -825,6 +824,7 @@ dwc3_0: usb@...00000 {
>  				interrupt-parent = <&gic>;
>  				interrupt-names = "dwc_usb3", "otg";
>  				interrupts = <0 65 4>, <0 69 4>;
> +				clock-names = "bus_early", "ref";
>  				#stream-id-cells = <1>;
>  				iommus = <&smmu 0x860>;
>  				snps,quirk-frame-length-adjustment = <0x20>;
> @@ -838,7 +838,6 @@ usb1: usb@...e0000 {
>  			status = "disabled";
>  			compatible = "xlnx,zynqmp-dwc3";
>  			reg = <0x0 0xff9e0000 0x0 0x100>;
> -			clock-names = "bus_clk", "ref_clk";
>  			power-domains = <&zynqmp_firmware PD_USB_1>;
>  			resets = <&zynqmp_reset ZYNQMP_RESET_USB1_CORERESET>,
>  				 <&zynqmp_reset ZYNQMP_RESET_USB1_HIBERRESET>,
> @@ -852,6 +851,7 @@ dwc3_1: usb@...00000 {
>  				interrupt-parent = <&gic>;
>  				interrupt-names = "dwc_usb3", "otg";
>  				interrupts = <0 70 4>, <0 74 4>;
> +				clock-names = "bus_early", "ref";
>  				#stream-id-cells = <1>;
>  				iommus = <&smmu 0x861>;
>  				snps,quirk-frame-length-adjustment = <0x20>;

Tested and working on ZynqMP.

Reviewed-by: Robert Hancock <robert.hancock@...ian.com>
Tested-by: Robert Hancock <robert.hancock@...ian.com>