linux-kernel - Re: [PATCH v3 06/10] ARM: dts: sun9i: Add USB host controller nodes to a80 dtsi

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Message-ID: <CAGb2v67cSq4oWWy4POR8uMruG_2cvdv8PPrzOTOx2JUJ=uBH+A@mail.gmail.com>
Date:	Sun, 1 Feb 2015 15:31:06 +0100
From:	Chen-Yu Tsai <wens@...e.org>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Mike Turquette <mturquette@...aro.org>,
	Emilio Lopez <emilio@...pez.com.ar>,
	Rob Herring <robh+dt@...nel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Kishon Vijay Abraham I <kishon@...com>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	devicetree <devicetree@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH v3 06/10] ARM: dts: sun9i: Add USB host controller nodes
 to a80 dtsi

Hi,

On Sun, Feb 1, 2015 at 3:17 PM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> On Wed, Jan 28, 2015 at 03:54:11AM +0800, Chen-Yu Tsai wrote:
>> The A80 has 3 EHCI/OHCI USB controllers.
>>
>> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
>> ---
>>  arch/arm/boot/dts/sun9i-a80.dtsi | 70 ++++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 70 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/sun9i-a80.dtsi b/arch/arm/boot/dts/sun9i-a80.dtsi
>> index d7ebd9390b01..9483b15bfda7 100644
>> --- a/arch/arm/boot/dts/sun9i-a80.dtsi
>> +++ b/arch/arm/boot/dts/sun9i-a80.dtsi
>> @@ -355,6 +355,28 @@
>>                */
>>               ranges = <0 0 0 0x20000000>;
>>
>> +             ehci0: usb@...00000 {
>> +                     compatible = "allwinner,sun9i-a80-ehci", "generic-ehci";
>> +                     reg = <0x00a00000 0x100>;
>> +                     interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
>> +                     clocks = <&usb_mod_clk 1>;
>> +                     resets = <&usb_mod_clk 17>;
>> +                     phys = <&usbphy1>;
>> +                     phy-names = "usb";
>> +                     status = "disabled";
>> +             };
>> +
>> +             ohci0: usb@...00400 {
>> +                     compatible = "allwinner,sun9i-a80-ohci", "generic-ohci";
>> +                     reg = <0x00a00400 0x100>;
>> +                     interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
>> +                     clocks = <&usb_mod_clk 1>, <&usb_mod_clk 2>;
>> +                     resets = <&usb_mod_clk 17>;
>> +                     phys = <&usbphy1>;
>> +                     phy-names = "usb";
>> +                     status = "disabled";
>> +             };
>> +
>>               usbphy1: phy@...00800 {
>>                       compatible = "allwinner,sun9i-a80-usb-phy";
>>                       reg = <0x00a00800 0x4>;
>> @@ -366,6 +388,32 @@
>>                       #phy-cells = <0>;
>>               };
>>
>> +             ehci1: usb@...01000 {
>> +                     compatible = "allwinner,sun9i-a80-ehci", "generic-ehci";
>> +                     reg = <0x00a01000 0x100>;
>> +                     interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
>> +                     clocks = <&usb_mod_clk 3>;
>> +                     resets = <&usb_mod_clk 18>;
>> +                     phys = <&usbphy2>;
>> +                     phy-names = "usb";
>> +                     status = "disabled";
>> +             };
>> +
>> +             /*
>> +              * Even though ohci1 exists, it is never used as
>> +              * usb1 only has HSIC pins routed externally
>> +              */
>> +             ohci1: usb@...01400 {
>> +                     compatible = "allwinner,sun9i-a80-ohci", "generic-ohci";
>> +                     reg = <0x00a01400 0x100>;
>> +                     interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>;
>> +                     clocks = <&usb_mod_clk 3>, <&usb_mod_clk 4>;
>> +                     resets = <&usb_mod_clk 18>;
>> +                     phys = <&usbphy2>;
>> +                     phy-names = "usb";
>> +                     status = "disabled";
>> +             };
>> +
>
> Is it worth declaring it then? If it's not never ever going to be used
> since no pins are routed outside of the SoC, I don't think it should
> be declared in the DTSI.

You have a point. Also the user manual doesn't even list OHCI1. I did
this work before the manual was available. I will update this patch.

ChenYu
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