linux-kernel - Re: [PATCH 2/3] arm64: dts: ti: k3-am6: add USB support

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Message-ID: <5C3F0D70.4050903@ti.com>
Date:   Wed, 16 Jan 2019 12:54:40 +0200
From:   Roger Quadros <rogerq@...com>
To:     Nishanth Menon <nm@...com>
CC:     <t-kristo@...com>, <nsekhar@...com>, <vigneshr@...com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] arm64: dts: ti: k3-am6: add USB support

On 15/01/19 16:36, Nishanth Menon wrote:
> On 12:01-20190111, Roger Quadros wrote:
>> Adds support for USB0 and USB1 instances on the AM6 SoC.
>> USB0 is limited to high-speed for now.
>>
>> Signed-off-by: Roger Quadros <rogerq@...com>
>> ---
>>  arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 80 ++++++++++++++++++++++++++++++++
>>  1 file changed, 80 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
>> index 8b55108..680cbc7 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
>> @@ -199,4 +199,84 @@
>>  		#size-cells = <1>;
>>  		ranges = <0x0 0x0 0x00100000 0x1c000>;
>>  	};
>> +
>> +	dwc3_0: dwc3@...0000 {
>> +		compatible = "ti,am654-dwc3";
>> +		reg = <0x0 0x4000000 0x0 0x4000>;
>> +		#address-cells = <1>;
>> +		#size-cells = <1>;
>> +		ranges = <0x0 0x0 0x4000000 0x20000>;
>> +		interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
>> +		dma-coherent;
>> +		status = "disabled";
> 
> NAK. -> in ARMV8, we dont do default disabled. Instead, please disable
> nodes in the board dts or overlay as necessary.

got it.

> 
>> +		power-domains = <&k3_pds 151>;
>> +		assigned-clocks = <&k3_clks 151 2>, <&k3_clks 151 7>;
>> +		assigned-clock-parents = <&k3_clks 151 4>,	/* set REF_CLK to 20MHz i.e. PER0_PLL/48 */
>> +					 <&k3_clks 151 9>;	/* set PIPE3_TXB_CLK to CLK_12M_RC/256 (for HS only) */
>> +
>> +		usb0: usb@...00 {
>> +			compatible = "snps,dwc3";
>> +			reg = <0x10000 0x10000>;
>> +			interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
>> +			interrupt-names = "peripheral",
>> +					  "host",
>> +					  "otg";
>> +			maximum-speed = "high-speed";
>> +			dr_mode = "otg";
>> +			phys = <&usb0_phy>;
>> +			phy-names = "usb2-phy";
>> +			snps,dis_u3_susphy_quirk;
>> +		};
>> +	};
>> +
>> +	usb0_phy: phy@...0000 {
>> +		compatible = "ti,am654-usb2", "ti,omap-usb2";
>> +		reg = <0x0 0x4100000 0x0 0x54>;
>> +		syscon-phy-power = <&scm_conf 0x4000>;
> 
> Just curious, dont we need a power domain as well?

Not for USB2.0 PHYs. Those are part of USB3SSn power domains.

> 
>> +		clocks = <&k3_clks 151 0>, <&k3_clks 151 1>;
>> +		clock-names = "wkupclk", "refclk";
>> +		#phy-cells = <0>;
>> +		status = "disabled";
> 
> same here -> please drop
> 
>> +	};
>> +
>> +	dwc3_1: dwc3@...0000 {
>> +		compatible = "ti,am654-dwc3";
>> +		reg = <0x0 0x4020000 0x0 0x4000>;
>> +		#address-cells = <1>;
>> +		#size-cells = <1>;
>> +		ranges = <0x0 0x0 0x4020000 0x20000>;
>> +		interrupts = <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
>> +		dma-coherent;
>> +		status = "disabled";
> 
> same here -> please drop
> 
>> +		power-domains = <&k3_pds 152>;
>> +		assigned-clocks = <&k3_clks 152 2>;
>> +		assigned-clock-parents = <&k3_clks 152 4>;	/* set REF_CLK to 20MHz i.e. PER0_PLL/48 */
>> +
>> +		usb1: usb@...00 {
>> +			compatible = "snps,dwc3";
>> +			reg = <0x10000 0x10000>;
>> +			interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>;
>> +			interrupt-names = "peripheral",
>> +					  "host",
>> +					  "otg";
>> +			maximum-speed = "high-speed";
>> +			dr_mode = "otg";
>> +			phys = <&usb1_phy>;
>> +			phy-names = "usb2-phy";
>> +		};
>> +	};
>> +
>> +	usb1_phy: phy@...0000 {
>> +		compatible = "ti,am654-usb2", "ti,omap-usb2";
>> +		reg = <0x0 0x4110000 0x0 0x54>;
>> +		syscon-phy-power = <&scm_conf 0x4020>;
> 
> Same question on power domain..
> 
>> +		clocks = <&k3_clks 152 0>, <&k3_clks 152 1>;
>> +		clock-names = "wkupclk", "refclk";
>> +		#phy-cells = <0>;
>> +		status = "disabled";
> 
> same here -> please drop
> 
>> +	};
>>  };
>> -- 
>> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
>> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
>>
> 

cheers,
-roger

-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki