Subject: [PATCH 4/9] arm64: dts: rockchip: support dwc3 USB for rk3399

From: [email-masked] (Brian Norris)
Date: Wed, 7 Dec 2016 09:52:08 -0800

Hi,

On Wed, Dec 07, 2016 at 06:09:16PM +0100, Heiko Stuebner wrote:
> Am Donnerstag, 1. Dezember 2016, 18:27:28 CET schrieb Brian Norris:
> > Add the dwc3 usb needed node information for rk3399.
> > 
> > Signed-off-by: Brian Norris <[email-masked]>
> > ---
> > Somewhat rewritten from Caesar's reposting (v2) of my patch.
> > 
> > Changes:
> >  * Include USB2 PHY (which is now in -next)
> >  * Don't include USB3 PHY, as extcon support is not ready yet
> >  * Drop non-upstream properties
> >  * Fixup whitespace a bit
> > ---
> >  arch/arm64/boot/dts/rockchip/rk3399.dtsi | 60
> > ++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> > b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index 4ca8f9a7601c..1e97fb8c6415
> > 100644
> > --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> > +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> > @@ -316,6 +316,66 @@
> >  		};
> >  	};
> > 
> > +	usbdrd3_0: usb at fe800000 {
> 
> insert location above usb at fe380000 is sorted wrong

So, *how* do you think things are sorted here? Alphabetical by label? Or
by node name? Or by unit address? I guess I'm seeing you meant unit
address. But pcie at f8000000 is also out of order then. I guess maybe
that's the only one then.

> > +		compatible = "rockchip,rk3399-dwc3";
> > +		#address-cells = <2>;
> > +		#size-cells = <2>;
> > +		ranges;
> > +		clocks = <&cru SCLK_USB3OTG0_REF>, <&cru SCLK_USB3OTG0_SUSPEND>,
> > +			 <&cru ACLK_USB3OTG0>, <&cru ACLK_USB3_RKSOC_AXI_PERF>,
> > +			 <&cru ACLK_USB3>, <&cru ACLK_USB3_GRF>;
> > +		clock-names = "clk_usb3otg0_ref", "clk_usb3otg0_suspend",
> > +			      "aclk_usb3otg0", "aclk_usb3_rksoc_axi_perf",
> > +			      "aclk_usb3", "aclk_usb3_grf";
> 
> clock-names do not match binding. The dwc3-of-simple does not care, as it just 
> enables all of them it seems, but binding doc states the clock names as
> 
> - clock-names:  Should contain the following:
>   "ref_clk"     Controller reference clk, have to be 24 MHz
>   "suspend_clk" Controller suspend clk, have to be 24 MHz or 32 KHz
>   "bus_clk"     Master/Core clock, have to be >= 62.5 MHz for SS
>                 operation and >= 30MHz for HS operation
>   "grf_clk"     Controller grf clk

Ah, sorry. I'll try to go with the rockchip,dwc3.txt names better.

There are a few extra clocks here now, but I think those might only be
for USB3 support, which isn't really working yet. I'll either document
them or drop them.

> > +		resets = <&cru SRST_A_USB3_OTG0>;
> > +		reset-names = "usb3-otg";
> 
> you could update the binding documentation to list this one.

Similar story; this is only used for some of the hacky stuff Rockchip is
doing for USB3/TypeC stuff out of tree. I'll either document it or drop
it (as I'm not actually using it yet).

Thanks,
Brian

> Heiko
> 
> > +		status = "disabled";
> > +
> > +		usbdrd_dwc3_0: dwc3 {
> > +			compatible = "snps,dwc3";
> > +			reg = <0x0 0xfe800000 0x0 0x100000>;
> > +			interrupts = <GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH 0>;
> > +			dr_mode = "otg";
> > +			phys = <&u2phy0_otg>;
> > +			phy-names = "usb2-phy";
> > +			snps,dis_enblslpm_quirk;
> > +			snps,dis-u2-freeclk-exists-quirk;
> > +			snps,dis_u2_susphy_quirk;
> > +			snps,dis-del-phy-power-chg-quirk;
> > +			status = "disabled";
> > +		};
> > +	};
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