linux-kernel - Re: [PATCH 07/13] arm64: dts: allwinner: a100: add usb related nodes

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Message-ID: <09bc7b6ac779caf7a5e5ebbd7243b165@epochal.quest>
Date: Mon, 28 Oct 2024 13:31:58 -0300
From: Cody Eksal <masterr3c0rd@...chal.quest>
To: Andre Przywara <andre.przywara@....com>
Cc: linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
 linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org,
 linux-usb@...r.kernel.org, Rob Herring <robh@...nel.org>, Krzysztof
 Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Chen-Yu
 Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>, Samuel
 Holland <samuel@...lland.org>, Parthiban <parthiban@...umiz.com>, Florian
 Fainelli <florian.fainelli@...adcom.com>, Vinod Koul <vkoul@...nel.org>,
 Linus Walleij <linus.walleij@...aro.org>, Thierry Reding
 <treding@...dia.com>, Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Maxime Ripard <mripard@...nel.org>, Greg Kroah-Hartman
 <gregkh@...uxfoundation.org>, Yangtao Li <tiny.windzz@...il.com>, Viresh
 Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>, Stephen Boyd
 <sboyd@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>, "Rafael J.
 Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH 07/13] arm64: dts: allwinner: a100: add usb related nodes

On 2024/10/25 9:44 pm, Andre Przywara wrote:
> On Thu, 24 Oct 2024 14:05:25 -0300
> Cody Eksal <masterr3c0rd@...chal.quest> wrote:
> 
> Hi,
> 
>> From: Yangtao Li <frank@...winnertech.com>
>> 
>> Allwinner A64 have two HCI USB controllers, a OTG controller and a USB
>> PHY device, let's add nodes on dts.
>> 
>> Signed-off-by: Yangtao Li <frank@...winnertech.com>
>> [masterr3c0rd@...chal.quest: fallback to a33-musb instead of h3-musb]
>> Signed-off-by: Cody Eksal <masterr3c0rd@...chal.quest>
>> ---
>>  .../arm64/boot/dts/allwinner/sun50i-a100.dtsi | 91 
>> +++++++++++++++++++
>>  1 file changed, 91 insertions(+)
>> 
>> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi 
>> b/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi
>> index adb11b26045f..0aee1b578661 100644
>> --- a/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi
>> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a100.dtsi
>> @@ -302,6 +302,97 @@ ths: thermal-sensor@...0400 {
>>  			#thermal-sensor-cells = <1>;
>>  		};
>> 
>> +		usbphy: phy@...0400 {
>> +			#phy-cells = <1>;
> 
> Please keep the compatible string first, and move #phy-cells to the 
> end.
Will be done in V2
>> +			compatible = "allwinner,sun50i-a100-usb-phy";
>> +			reg = <0x05100400 0x14>,
>> +			      <0x05101800 0x4>,
>> +			      <0x05200800 0x4>;
> 
> We need at least 0x24 for the phy_ctrl and 0x14 for the PMUs. But I
> wonder if we should use 0x100 for all of them, like for the D1, as 
> there
> are more registers. The fact that the Linux driver doesn't use more
> shouldn't prevent the DT from describing them.
This as well.
>> +			reg-names = "phy_ctrl",
>> +				    "pmu0",
>> +				    "pmu1";
>> +			clocks = <&ccu CLK_USB_PHY0>,
>> +				 <&ccu CLK_USB_PHY1>;
>> +			clock-names = "usb0_phy",
>> +				      "usb1_phy";
>> +			resets = <&ccu RST_USB_PHY0>,
>> +				 <&ccu RST_USB_PHY1>;
>> +			reset-names = "usb0_reset",
>> +				      "usb1_reset";
>> +			status = "disabled";
>> +		};
>> +
>> +		ehci0: usb@...1000 {
> 
> The nodes are ordered by their MMIO base address, so please move them
> around accordingly.
I double checked; the only note that wasn't in order was MUSB, which 
fits above the USB PHY in the memory map. I've moved those up.
>> +			compatible = "allwinner,sun50i-a100-ehci",
>> +				     "generic-ehci";
>> +			reg = <0x05101000 0x100>;
>> +			interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&ccu CLK_BUS_OHCI0>,
>> +				 <&ccu CLK_BUS_EHCI0>,
>> +				 <&ccu CLK_USB_OHCI0>;
>> +			resets = <&ccu RST_BUS_OHCI0>,
>> +				 <&ccu RST_BUS_EHCI0>;
>> +			phys = <&usbphy 0>;
>> +			phy-names = "usb";
>> +			status = "disabled";
>> +		};
>> +
>> +		ohci0: usb@...1400 {
>> +			compatible = "allwinner,sun50i-a100-ohci",
>> +				     "generic-ohci";
>> +			reg = <0x05101400 0x100>;
>> +			interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&ccu CLK_BUS_OHCI0>,
>> +				 <&ccu CLK_USB_OHCI0>;
>> +			resets = <&ccu RST_BUS_OHCI0>;
>> +			phys = <&usbphy 0>;
>> +			phy-names = "usb";
>> +			status = "disabled";
>> +		};
>> +
>> +		usb_otg: usb@...0000 {
>> +			compatible = "allwinner,sun50i-a100-musb",
>> +				     "allwinner,sun8i-a33-musb";
>> +			reg = <0x05100000 0x0400>;
>> +			clocks = <&ccu CLK_BUS_OTG>;
>> +			resets = <&ccu RST_BUS_OTG>;
>> +			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
>> +			interrupt-names = "mc";
>> +			phys = <&usbphy 0>;
>> +			phy-names = "usb";
>> +			extcon = <&usbphy 0>;
>> +			dr_mode = "otg";
> 
> dr_mode should be set in the board .dts, so please remove that line
> from here.
Done, and updated the Perf1 DTS to reflect this
> For the records: I checked the MMIO base addresses, clock and reset
> names and the IRQs against the manual: they all match.
Thanks again!
- Cody
> Cheers,
> Andre
> 
>> +			status = "disabled";
>> +		};
>> +