linux-kernel - Re: [PATCH 3/3] arm64: dts: mediatek: Add USB xHCI controller for mt8195

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Date:   Fri, 10 Dec 2021 14:33:48 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mathias Nyman <mathias.nyman@...el.com>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] arm64: dts: mediatek: Add USB xHCI controller for
 mt8195

On Fri, 2021-11-26 at 11:36 +0100, AngeloGioacchino Del Regno wrote:
> Il 02/11/21 07:00, Chunfeng Yun ha scritto:
> > Add all four USB xHCI controllers for MT8195
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> >   arch/arm64/boot/dts/mediatek/mt8195.dtsi | 79
> > ++++++++++++++++++++++++
> >   1 file changed, 79 insertions(+)
> > 
> 
> Hello!
> Thanks for the patch! However, there is something to improve...
> 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > index a59c0e9d1fc2..263eebfd2ea1 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > @@ -8,6 +8,7 @@
> >   #include <dt-bindings/clock/mt8195-clk.h>
> >   #include <dt-bindings/interrupt-controller/arm-gic.h>
> >   #include <dt-bindings/interrupt-controller/irq.h>
> > +#include <dt-bindings/phy/phy.h>
> >   #include <dt-bindings/power/mt8195-power.h>
> >   
> >   / {
> > @@ -823,6 +824,26 @@
> >   			status = "disabled";
> >   		};
> >   
> > +		xhci0: usb@...00000 {
> > +			compatible = "mediatek,mt8195-xhci",
> > "mediatek,mtk-xhci";
> > +			reg = <0 0x11200000 0 0x1000>, <0 0x11203e00 0
> > 0x0100>;
> > +			reg-names = "mac", "ippc";
> > +			interrupts = <GIC_SPI 129 IRQ_TYPE_LEVEL_HIGH
> > 0>;
> 
> Here, and on the other xhci nodes (from what I know, xhci{0,1,3}),
> you should use
> interrupts-extended and declare the wakeup interrupt on pio.
> 
> 			interrupts-extended = <&gic GIC_SPI 129
> IRQ_TYPE_LEVEL_HIGH 0>,
> 
> 					      <&pio 219
> IRQ_TYPE_LEVEL_LOW>;
> 
> 			interrupt-names = "host", "wakeup";
Ok, this patch doesn't support runtime suspend, will add it in next
version, thanks a lot

> 
> 
> > +			phys = <&u2port0 PHY_TYPE_USB2>, <&u3port0
> > PHY_TYPE_USB3>;
> > +			assigned-clocks = <&topckgen CLK_TOP_USB_TOP>,
> > +					  <&topckgen
> > CLK_TOP_SSUSB_XHCI>;
> > +			assigned-clock-parents = <&topckgen
> > CLK_TOP_UNIVPLL_D5_D4>,
> > +						 <&topckgen
> > CLK_TOP_UNIVPLL_D5_D4>;
> > +			clocks = <&infracfg_ao CLK_INFRA_AO_SSUSB>,
> > +				 <&infracfg_ao
> > CLK_INFRA_AO_SSUSB_XHCI>,
> > +				 <&topckgen CLK_TOP_SSUSB_REF>,
> > +				 <&apmixedsys CLK_APMIXED_USB1PLL>;
> > +			clock-names = "sys_ck", "xhci_ck", "ref_ck",
> > "mcu_ck";
> > +			mediatek,syscon-wakeup = <&pericfg 0x400 103>;
> > +			wakeup-source;
> > +			status = "disabled";
> > +		};
> > +
> >   		mmc0: mmc@...30000 {
> >   			compatible = "mediatek,mt8195-mmc",
> > "mediatek,mt8192-mmc";
> >   			reg = <0 0x11230000 0 0x10000>,
> > @@ -843,6 +864,64 @@
> >   			status = "disabled";
> >   		};
> >   
> > +		xhci1: usb@...90000 {
> > +			compatible = "mediatek,mt8195-xhci",
> > "mediatek,mtk-xhci";
> > +			reg = <0 0x11290000 0 0x1000>, <0 0x11293e00 0
> > 0x0100>;
> > +			reg-names = "mac", "ippc";
> > +			interrupts = <GIC_SPI 530 IRQ_TYPE_LEVEL_HIGH
> > 0>;
> 
> 			interrupts-extended = <&gic GIC_SPI 530
> IRQ_TYPE_LEVEL_HIGH 0>,
> 
> 					      <&pio 218
> IRQ_TYPE_LEVEL_LOW>;
> 
> > +			phys = <&u2port1 PHY_TYPE_USB2>;
> > +			assigned-clocks = <&topckgen
> > CLK_TOP_USB_TOP_1P>,
> > +					  <&topckgen
> > CLK_TOP_SSUSB_XHCI_1P>;
> > +			assigned-clock-parents = <&topckgen
> > CLK_TOP_UNIVPLL_D5_D4>,
> > +						 <&topckgen
> > CLK_TOP_UNIVPLL_D5_D4>;
> > +			clocks = <&pericfg_ao
> > CLK_PERI_AO_SSUSB_1P_BUS>,
> > +				 <&pericfg_ao
> > CLK_PERI_AO_SSUSB_1P_XHCI>,
> > +				 <&topckgen CLK_TOP_SSUSB_P1_REF>,
> > +				 <&apmixedsys CLK_APMIXED_USB1PLL>;
> > +			clock-names = "sys_ck", "xhci_ck", "ref_ck",
> > "mcu_ck";
> > +			mediatek,syscon-wakeup = <&pericfg 0x400 104>;
> > +			wakeup-source;
> > +			status = "disabled";
> > +		};
> > +
> > +		xhci2: usb@...a0000 {
> > +			compatible = "mediatek,mt8195-xhci",
> > "mediatek,mtk-xhci";
> > +			reg = <0 0x112a0000 0 0x1000>, <0 0x112a3e00 0
> > 0x0100>;
> > +			reg-names = "mac", "ippc";
> > +			interrupts = <GIC_SPI 533 IRQ_TYPE_LEVEL_HIGH
> > 0>;
> > +			phys = <&u2port2 PHY_TYPE_USB2>;
> > +			assigned-clocks = <&topckgen
> > CLK_TOP_USB_TOP_2P>,
> > +					  <&topckgen
> > CLK_TOP_SSUSB_XHCI_2P>;
> > +			assigned-clock-parents = <&topckgen
> > CLK_TOP_UNIVPLL_D5_D4>,
> > +						 <&topckgen
> > CLK_TOP_UNIVPLL_D5_D4>;
> > +			clocks = <&pericfg_ao
> > CLK_PERI_AO_SSUSB_2P_BUS>,
> > +				 <&pericfg_ao
> > CLK_PERI_AO_SSUSB_2P_XHCI>,
> > +				 <&topckgen CLK_TOP_SSUSB_P2_REF>;
> > +			clock-names = "sys_ck", "xhci_ck", "ref_ck";
> > +			mediatek,syscon-wakeup = <&pericfg 0x400 105>;
> > +			status = "disabled";
> > +		};
> > +
> > +		xhci3: usb@...b0000 {
> > +			compatible = "mediatek,mt8195-xhci",
> > "mediatek,mtk-xhci";
> > +			reg = <0 0x112b0000 0 0x1000>, <0 0x112b3e00 0
> > 0x0100>;
> > +			reg-names = "mac", "ippc";
> > +			interrupts = <GIC_SPI 536 IRQ_TYPE_LEVEL_HIGH
> > 0>;
> 
> 			interrupts-extended = <&gic GIC_SPI 536
> IRQ_TYPE_LEVEL_HIGH 0>,
> 
> 					      <&pio 221
> IRQ_TYPE_LEVEL_LOW>;
> 
> 			interrupts-names = "host", "wakeup";
> 
> > +			phys = <&u2port3 PHY_TYPE_USB2>;
> > +			assigned-clocks = <&topckgen
> > CLK_TOP_USB_TOP_3P>,
> > +					  <&topckgen
> > CLK_TOP_SSUSB_XHCI_3P>;
> > +			assigned-clock-parents = <&topckgen
> > CLK_TOP_UNIVPLL_D5_D4>,
> > +						 <&topckgen
> > CLK_TOP_UNIVPLL_D5_D4>;
> > +			clocks = <&pericfg_ao
> > CLK_PERI_AO_SSUSB_3P_BUS>,
> > +				 <&pericfg_ao
> > CLK_PERI_AO_SSUSB_3P_XHCI>,
> > +				 <&topckgen CLK_TOP_SSUSB_P3_REF>;
> > +			clock-names = "sys_ck", "xhci_ck", "ref_ck";
> > +			mediatek,syscon-wakeup = <&pericfg 0x400 106>;
> > +			wakeup-source;
> > +			usb2-lpm-disable;
> > +			status = "disabled";
> > +		};
> > +
> >   		nor_flash: nor@...2c000 {
> >   			compatible = "mediatek,mt8195-nor",
> > "mediatek,mt8173-nor";
> >   			reg = <0 0x1132c000 0 0x1000>;
> > 
> 
> Regards,
> - Angelo