| Message ID | 20220225145432.422130-3-pgwipeout@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | enable usb support on rk356x | expand |
On Fri, Feb 25, 2022 at 11:07 AM Johan Jonker <jbx6244@gmail.com> wrote: > > Hi Peter, > > Lots of USB series all of a sudden. > Combine possible? > > On 2/25/22 15:54, Peter Geis wrote: > > The rk3568 dwc3 controllers are backwards compatible with the rk3399. > > Add the device tree description for it. > > > > Signed-off-by: Peter Geis <pgwipeout@gmail.com> > > --- > > Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml | 7 ++++++- > > 1 file changed, 6 insertions(+), 1 deletion(-) > > > > diff --git a/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml b/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml > > index 04077f2d7faf..e3044e81cc72 100644 > > --- a/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml > > +++ b/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml > > @@ -30,6 +30,7 @@ select: > > enum: > > - rockchip,rk3328-dwc3 > > - rockchip,rk3399-dwc3 > > + - rockchip,rk3568-dwc3 > > required: > > - compatible > > > > @@ -39,6 +40,7 @@ properties: > > - enum: > > - rockchip,rk3328-dwc3 > > - rockchip,rk3399-dwc3 > > + - rockchip,rk3568-dwc3 > > - const: snps,dwc3 > > > > reg: > > @@ -75,7 +77,10 @@ properties: > > maxItems: 1 > > > he > > reset-names: > > - const: usb3-otg > > + items: > > + - enum: > > + - usb3-otg > > + - usb3-host > > The use of reset-names is "sort of" only related to the rk3399 legacy > node. Still using this sub node DT to not to break older existing boot > loaders. > > https://github.com/torvalds/linux/search?q=usb3-otg > > It's only mentioned as comment in dwc3-of-simple.c but not used: > > simple->resets = of_reset_control_array_get(np, false, true, > true); > core.c uses something similar. > > dwc->reset = devm_reset_control_array_get_optional_shared(dev); > if (IS_ERR(dwc->reset)) > return PTR_ERR(dwc->reset); > > > Up to the maintainers, but I wouldn't add another variant/name for the > same thing as it also optional(= not required) and no longer needed. I left these named separately since they are different reset signals, but if it isn't an issue I don't mind having them both be usb3-otg. > > Johan > > === > > Maybe drop PCLK_PIPE as well to reduce notifications. I'll be conducting testing to determine if we need PCLK_PIPE here, and as long as it isn't working simply because it's enabled by someone else I'll drop it. Ideally, it would be nice to have a proper clock map for these chips, but currently that's not in the TRM. > > See example: > https://lore.kernel.org/linux-rockchip/20220225131602.2283499-4-michael.riesch@wolfvision.net/T/#u > > > > > unevaluatedProperties: false > > Thanks for the review!
diff --git a/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml b/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml index 04077f2d7faf..e3044e81cc72 100644 --- a/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml +++ b/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml @@ -30,6 +30,7 @@ select: enum: - rockchip,rk3328-dwc3 - rockchip,rk3399-dwc3 + - rockchip,rk3568-dwc3 required: - compatible @@ -39,6 +40,7 @@ properties: - enum: - rockchip,rk3328-dwc3 - rockchip,rk3399-dwc3 + - rockchip,rk3568-dwc3 - const: snps,dwc3 reg: @@ -75,7 +77,10 @@ properties: maxItems: 1 reset-names: - const: usb3-otg + items: + - enum: + - usb3-otg + - usb3-host unevaluatedProperties: false
The rk3568 dwc3 controllers are backwards compatible with the rk3399. Add the device tree description for it. Signed-off-by: Peter Geis <pgwipeout@gmail.com> --- Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)