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Message-ID: <20200527013715.GA847644@bogus>
Date: Tue, 26 May 2020 19:37:15 -0600
From: Rob Herring <robh@...nel.org>
To: Roger Quadros <rogerq@...com>
Cc: balbi@...nel.org, vigneshr@...com, linux-usb@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: usb: convert keystone-usb.txt to YAML
On Wed, May 13, 2020 at 04:07:07PM +0300, Roger Quadros wrote:
> Convert keystone-usb documentation to YAML format.
>
> Signed-off-by: Roger Quadros <rogerq@...com>
> ---
> .../devicetree/bindings/usb/keystone-usb.txt | 56 ----------------
> .../bindings/usb/ti,keystone-dwc3.yaml | 67 +++++++++++++++++++
> 2 files changed, 67 insertions(+), 56 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/usb/keystone-usb.txt
> create mode 100644 Documentation/devicetree/bindings/usb/ti,keystone-dwc3.yaml
>
> diff --git a/Documentation/devicetree/bindings/usb/keystone-usb.txt b/Documentation/devicetree/bindings/usb/keystone-usb.txt
> deleted file mode 100644
> index 77df82e36138..000000000000
> --- a/Documentation/devicetree/bindings/usb/keystone-usb.txt
> +++ /dev/null
> @@ -1,56 +0,0 @@
> -TI Keystone Soc USB Controller
> -
> -DWC3 GLUE
> -
> -Required properties:
> - - compatible: should be
> - "ti,keystone-dwc3" for Keystone 2 SoCs
> - "ti,am654-dwc3" for AM654 SoC
> - - #address-cells, #size-cells : should be '1' if the device has sub-nodes
> - with 'reg' property.
> - - reg : Address and length of the register set for the USB subsystem on
> - the SOC.
> - - interrupts : The irq number of this device that is used to interrupt the
> - MPU.
> - - ranges: allows valid 1:1 translation between child's address space and
> - parent's address space.
> -
> -SoC-specific Required Properties:
> -The following are mandatory properties for Keystone 2 66AK2HK, 66AK2L and 66AK2E
> -SoCs only:
> -
> -- clocks: Clock ID for USB functional clock.
> -- clock-names: Must be "usb".
> -
> -
> -The following are mandatory properties for 66AK2G and AM654:
> -
> -- power-domains: Should contain a phandle to a PM domain provider node
> - and an args specifier containing the USB device id
> - value. This property is as per the binding,
> - Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
> -
> -Sub-nodes:
> -The dwc3 core should be added as subnode to Keystone DWC3 glue.
> -- dwc3 :
> - The binding details of dwc3 can be found in:
> - Documentation/devicetree/bindings/usb/dwc3.txt
> -
> -Example:
> - usb: usb@...0000 {
> - compatible = "ti,keystone-dwc3";
> - #address-cells = <1>;
> - #size-cells = <1>;
> - reg = <0x2680000 0x10000>;
> - clocks = <&clkusb>;
> - clock-names = "usb";
> - interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;
> - ranges;
> -
> - dwc3@...0000 {
> - compatible = "synopsys,dwc3";
> - reg = <0x2690000 0x70000>;
> - interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;
> - usb-phy = <&usb_phy>, <&usb_phy>;
> - };
> - };
> diff --git a/Documentation/devicetree/bindings/usb/ti,keystone-dwc3.yaml b/Documentation/devicetree/bindings/usb/ti,keystone-dwc3.yaml
> new file mode 100644
> index 000000000000..14d2fe329b93
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/ti,keystone-dwc3.yaml
> @@ -0,0 +1,67 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/ti,keystone-dwc3.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI Keystone Soc USB Controller
> +
> +maintainers:
> + - Roger Quadros <rogerq@...com>
> +
> +properties:
> + compatible:
> + oneOf:
> + - const: "ti,keystone-dwc3"
> + - const: "ti,am654-dwc3"
Use enum rather than oneOf+const.
> +
> + reg:
> + maxItems: 1
> + description: Address and length of the register set for the USB subsystem on
> + the SOC.
> +
> + interrupts:
> + maxItems: 1
> + description: The irq number of this device that is used to interrupt the MPU.
No need for genericish descriptions when a single item.
> +
> +
> + clocks:
> + description: Clock ID for USB functional clock.
How many?
> +
> + power-domains:
> + description: Should contain a phandle to a PM domain provider node
> + and an args specifier containing the USB device id
> + value. This property is as per the binding,
> + Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
How many?
> +
> + dwc3:
This doesn't work because there's a unit address. You need a pattern.
> + description: This is the node representing the DWC3 controller instance
> + Documentation/devicetree/bindings/usb/dwc3.txt
type: object
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - clocks
additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + usb: usb@...0000 {
> + compatible = "ti,keystone-dwc3";
> + #address-cells = <1>;
> + #size-cells = <1>;
These have to be documented.
> + reg = <0x2680000 0x10000>;
> + clocks = <&clkusb>;
> + clock-names = "usb";
> + interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;
> + ranges;
This too.
> +
> + dwc3@...0000 {
> + compatible = "synopsys,dwc3";
> + reg = <0x2690000 0x70000>;
> + interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;
> + usb-phy = <&usb_phy>, <&usb_phy>;
> + };
> + };
> --
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
>
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