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Message-ID: <20210103162329.GA3961287@robh.at.kernel.org>
Date: Sun, 3 Jan 2021 09:23:29 -0700
From: Rob Herring <robh@...nel.org>
To: Rafał Miłecki <zajec5@...il.com>
Cc: Kishon Vijay Abraham I <kishon@...com>,
Vinod Koul <vkoul@...nel.org>,
Florian Fainelli <f.fainelli@...il.com>,
bcm-kernel-feedback-list@...adcom.com,
Al Cooper <alcooperx@...il.com>, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Rafał Miłecki <rafal@...ecki.pl>
Subject: Re: [PATCH V2 1/3] dt-bindings: phy: brcm,brcmstb-usb-phy: convert
to the json-schema
On Mon, Dec 21, 2020 at 06:23:37AM +0100, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@...ecki.pl>
>
> Changes that require mentioning:
> 1. interrupt-names
> Name "wakeup" was changed to the "wake". It matches example and what
> Linux driver looks for in the first place
> 2. brcm,ipp and brcm,ioc
> Both were described as booleans with 0 / 1 values. In examples they
> were integers and Linux driver checks for int as well.
> I made both uint32 but that probably should be refactored later.
Why? You're stuck with that now.
> 3. Added minimal description
>
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
> ---
> V2: Add Al as maintainer
> ---
> .../bindings/phy/brcm,brcmstb-usb-phy.txt | 86 --------
> .../bindings/phy/brcm,brcmstb-usb-phy.yaml | 196 ++++++++++++++++++
> 2 files changed, 196 insertions(+), 86 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/phy/brcm,brcmstb-usb-phy.txt
> create mode 100644 Documentation/devicetree/bindings/phy/brcm,brcmstb-usb-phy.yaml
>
> diff --git a/Documentation/devicetree/bindings/phy/brcm,brcmstb-usb-phy.txt b/Documentation/devicetree/bindings/phy/brcm,brcmstb-usb-phy.txt
> deleted file mode 100644
> index 698aacbdcfc4..000000000000
> --- a/Documentation/devicetree/bindings/phy/brcm,brcmstb-usb-phy.txt
> +++ /dev/null
> @@ -1,86 +0,0 @@
> -Broadcom STB USB PHY
> -
> -Required properties:
> -- compatible: should be one of
> - "brcm,brcmstb-usb-phy"
> - "brcm,bcm7216-usb-phy"
> - "brcm,bcm7211-usb-phy"
> -
> -- reg and reg-names properties requirements are specific to the
> - compatible string.
> - "brcm,brcmstb-usb-phy":
> - - reg: 1 or 2 offset and length pairs. One for the base CTRL registers
> - and an optional pair for systems with USB 3.x support
> - - reg-names: not specified
> - "brcm,bcm7216-usb-phy":
> - - reg: 3 offset and length pairs for CTRL, XHCI_EC and XHCI_GBL
> - registers
> - - reg-names: "ctrl", "xhci_ec", "xhci_gbl"
> - "brcm,bcm7211-usb-phy":
> - - reg: 5 offset and length pairs for CTRL, XHCI_EC, XHCI_GBL,
> - USB_PHY and USB_MDIO registers and an optional pair
> - for the BDC registers
> - - reg-names: "ctrl", "xhci_ec", "xhci_gbl", "usb_phy", "usb_mdio", "bdc_ec"
> -
> -- #phy-cells: Shall be 1 as it expects one argument for setting
> - the type of the PHY. Possible values are:
> - - PHY_TYPE_USB2 for USB1.1/2.0 PHY
> - - PHY_TYPE_USB3 for USB3.x PHY
> -
> -Optional Properties:
> -- clocks : clock phandles.
> -- clock-names: String, clock name.
> -- interrupts: wakeup interrupt
> -- interrupt-names: "wakeup"
> -- brcm,ipp: Boolean, Invert Port Power.
> - Possible values are: 0 (Don't invert), 1 (Invert)
> -- brcm,ioc: Boolean, Invert Over Current detection.
> - Possible values are: 0 (Don't invert), 1 (Invert)
> -- dr_mode: String, PHY Device mode.
> - Possible values are: "host", "peripheral ", "drd" or "typec-pd"
> - If this property is not defined, the phy will default to "host" mode.
> -- brcm,syscon-piarbctl: phandle to syscon for handling config registers
> -NOTE: one or both of the following two properties must be set
> -- brcm,has-xhci: Boolean indicating the phy has an XHCI phy.
> -- brcm,has-eohci: Boolean indicating the phy has an EHCI/OHCI phy.
> -
> -
> -Example:
> -
> -usbphy_0: usb-phy@...70200 {
> - reg = <0xf0470200 0xb8>,
> - <0xf0471940 0x6c0>;
> - compatible = "brcm,brcmstb-usb-phy";
> - #phy-cells = <1>;
> - dr_mode = "host"
> - brcm,ioc = <1>;
> - brcm,ipp = <1>;
> - brcm,has-xhci;
> - brcm,has-eohci;
> - clocks = <&usb20>, <&usb30>;
> - clock-names = "sw_usb", "sw_usb3";
> -};
> -
> -usb-phy@...0200 {
> - reg = <0x29f0200 0x200>,
> - <0x29c0880 0x30>,
> - <0x29cc100 0x534>,
> - <0x2808000 0x24>,
> - <0x2980080 0x8>;
> - reg-names = "ctrl",
> - "xhci_ec",
> - "xhci_gbl",
> - "usb_phy",
> - "usb_mdio";
> - brcm,ioc = <0x0>;
> - brcm,ipp = <0x0>;
> - compatible = "brcm,bcm7211-usb-phy";
> - interrupts = <0x30>;
> - interrupt-parent = <&vpu_intr1_nosec_intc>;
> - interrupt-names = "wake";
> - #phy-cells = <0x1>;
> - brcm,has-xhci;
> - syscon-piarbctl = <&syscon_piarbctl>;
> - clocks = <&scmi_clk 256>;
> - clock-names = "sw_usb";
> -};
> diff --git a/Documentation/devicetree/bindings/phy/brcm,brcmstb-usb-phy.yaml b/Documentation/devicetree/bindings/phy/brcm,brcmstb-usb-phy.yaml
> new file mode 100644
> index 000000000000..1dad1e3df1a5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/brcm,brcmstb-usb-phy.yaml
> @@ -0,0 +1,196 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/brcm,brcmstb-usb-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Broadcom STB USB PHY
> +
> +description: Broadcom's PHY that handles EHCI/OHCI and/or XHCI
> +
> +maintainers:
> + - Al Cooper <alcooperx@...il.com>
> + - Rafał Miłecki <rafal@...ecki.pl>
> +
> +properties:
> + compatible:
> + enum:
> + - brcm,bcm7211-usb-phy
> + - brcm,bcm7216-usb-phy
> + - brcm,brcmstb-usb-phy
> +
> + clocks:
> + minItems: 1
> + maxItems: 2
> +
> + clock-names:
> + minItems: 1
> + maxItems: 2
> + items:
> + - const: sw_usb
> + - const: sw_usb3
> +
> + interrupts:
> + description: wakeup interrupt
> +
> + interrupt-names:
> + const: wake
> +
> + brcm,ipp:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: Invert Port Power
> + minimum: 0
> + maximum: 1
> +
> + brcm,ioc:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: Invert Over Current detection
> + minimum: 0
> + maximum: 1
> +
> + dr_mode:
> + description: PHY Device mode. If this property is not defined, the PHY will
> + default to "host" mode.
> + enum:
> + - host
> + - peripheral
> + - drd
> + - typec-pd
> +
> + brcm,syscon-piarbctl:
> + description: phandle to syscon for handling config registers
> + $ref: /schemas/types.yaml#/definitions/phandle
> +
> + brcm,has-xhci:
> + description: Indicates the PHY has an XHCI PHY.
> + type: boolean
> +
> + brcm,has-eohci:
> + description: Indicates the PHY has an EHCI/OHCI PHY.
> + type: boolean
> +
> + "#phy-cells":
> + description: |
> + Cell allows setting the type of the PHY. Possible values are:
> + - PHY_TYPE_USB2 for USB1.1/2.0 PHY
> + - PHY_TYPE_USB3 for USB3.x PHY
> + const: 1
> +
> +required:
> + - reg
> + - "#phy-cells"
> +
> +anyOf:
> + - required:
> + - brcm,has-xhci
> + - required:
> + - brcm,has-eohci
> +
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,brcmstb-usb-phy
> + then:
> + properties:
> + reg:
> + minItems: 1
> + maxItems: 2
> + items:
> + - description: the base CTRL register
> + - description: XHCI EC register
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,bcm7211-usb-phy
> + then:
> + properties:
> + reg:
> + minItems: 5
> + maxItems: 6
> + items:
> + - description: the base CTRL register
> + - description: XHCI EC register
> + - description: XHCI GBL register
> + - description: USB PHY register
> + - description: USB MDIO register
> + - description: BDC register
> + reg-names:
> + minItems: 5
> + maxItems: 6
> + items:
> + - const: ctrl
> + - const: xhci_ec
> + - const: xhci_gbl
> + - const: usb_phy
> + - const: usb_mdio
> + - const: bdc_ec
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: brcm,bcm7216-usb-phy
> + then:
> + properties:
> + reg:
> + minItems: 3
> + maxItems: 3
> + items:
> + - description: the base CTRL register
> + - description: XHCI EC register
> + - description: XHCI GBL register
> + reg-names:
> + minItems: 3
> + maxItems: 3
> + items:
> + - const: ctrl
> + - const: xhci_ec
> + - const: xhci_gbl
Given the names are always the same, you can define them in the main
section and then the if/then schemas just need minItems/maxItems.
> +
> +additionalProperties: true
Define reg/reg-names in the main section and make this false.
> +
> +examples:
> + - |
> + #include <dt-bindings/phy/phy.h>
> +
> + usb-phy@...70200 {
> + compatible = "brcm,brcmstb-usb-phy";
> + reg = <0xf0470200 0xb8>,
> + <0xf0471940 0x6c0>;
> + #phy-cells = <1>;
> + dr_mode = "host";
> + brcm,ioc = <1>;
> + brcm,ipp = <1>;
> + brcm,has-xhci;
> + brcm,has-eohci;
> + clocks = <&usb20>, <&usb30>;
> + clock-names = "sw_usb", "sw_usb3";
> + };
> + - |
> + #include <dt-bindings/phy/phy.h>
> +
> + usb-phy@...0200 {
> + compatible = "brcm,bcm7211-usb-phy";
> + reg = <0x29f0200 0x200>,
> + <0x29c0880 0x30>,
> + <0x29cc100 0x534>,
> + <0x2808000 0x24>,
> + <0x2980080 0x8>;
> + reg-names = "ctrl",
> + "xhci_ec",
> + "xhci_gbl",
> + "usb_phy",
> + "usb_mdio";
> + brcm,ioc = <0x0>;
> + brcm,ipp = <0x0>;
> + interrupts = <0x30>;
> + interrupt-parent = <&vpu_intr1_nosec_intc>;
> + interrupt-names = "wake";
> + #phy-cells = <0x1>;
> + brcm,has-xhci;
> + syscon-piarbctl = <&syscon_piarbctl>;
> + clocks = <&scmi_clk 256>;
> + clock-names = "sw_usb";
> + };
> --
> 2.26.2
>
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