On Fri, Oct 04, 2024 at 02:45:20PM +0200, Francesco Dolcini wrote: > From: Parth Pancholi <parth.pancholi@xxxxxxxxxxx> > > Add device tree bindings for TI's TUSB73x0 PCIe-to-USB 3.0 xHCI > host controller. The controller supports software configuration > through PCIe registers, such as controlling the PWRONx polarity > via the USB control register (E0h). > > Similar generic PCIe-based bindings can be found as qcom,ath11k-pci.yaml > as an example. > > Datasheet: https://www.ti.com/lit/ds/symlink/tusb7320.pdf > Signed-off-by: Parth Pancholi <parth.pancholi@xxxxxxxxxxx> > Signed-off-by: Francesco Dolcini <francesco.dolcini@xxxxxxxxxxx> > --- > .../bindings/usb/ti,tusb73x0-pci.yaml | 60 +++++++++++++++++++ > 1 file changed, 60 insertions(+) > create mode 100644 Documentation/devicetree/bindings/usb/ti,tusb73x0-pci.yaml > > diff --git a/Documentation/devicetree/bindings/usb/ti,tusb73x0-pci.yaml b/Documentation/devicetree/bindings/usb/ti,tusb73x0-pci.yaml > new file mode 100644 > index 000000000000..bcb619b08ad3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/usb/ti,tusb73x0-pci.yaml > @@ -0,0 +1,60 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/usb/ti,tusb73x0-pci.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: TUSB73x0 USB 3.0 xHCI Host Controller (PCIe) > + > +maintainers: > + - Francesco Dolcini <francesco.dolcini@xxxxxxxxxxx> > + > +description: > + TUSB73x0 USB 3.0 xHCI Host Controller via PCIe x1 Gen2 interface. > + The TUSB7320 supports up to two downstream ports, the TUSB7340 supports up > + to four downstream ports. > + > +properties: > + compatible: > + const: pci104C,8241 > + > + reg: > + maxItems: 1 > + > + ti,tusb7320-pwron-polarity-invert: To me, "polarity-invert" makes less sense than calling this "active-high" making the property a flag. active-low would then be the case where the property is not provided. Given you don't make the property required, what you've got here is effectively a flag anyway. > + type: boolean > + description: > + Configure the polarity of the PWRONx# signals. When this is false, the PWRONx# > + pins are active low and their internal pull-down resistors are enabled. > + When this is true, the PWRONx# pins are active high and their internal pull-down > + resistors are disabled. > + > +required: > + - compatible > + - reg > + > +additionalProperties: false > + > +examples: > + - | > + pcie { > + #address-cells = <3>; > + #size-cells = <2>; > + > + pcie@0 { > + device_type = "pci"; > + reg = <0x0 0x0 0x0 0x0 0x0>; > + bus-range = <0x01 0xff>; > + > + #address-cells = <3>; > + #size-cells = <2>; > + ranges; > + > + usb@0 { > + compatible = "pci104C,8241"; > + reg = <0x10000 0x0 0x0 0x0 0x0>; > + > + ti,tusb7320-pwron-polarity-invert; > + }; > + }; > + }; > -- > 2.39.5 >
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