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Mon, 23 Nov 2020 14:08:49 +0000 From: Li Jun To: heikki.krogerus@linux.intel.com, robh+dt@kernel.org, rafael@kernel.org Cc: gregkh@linuxfoundation.org, andriy.shevchenko@linux.intel.com, hdegoede@redhat.com, lee.jones@linaro.org, mika.westerberg@linux.intel.com, dmitry.torokhov@gmail.com, prabhakar.mahadev-lad.rj@bp.renesas.com, laurent.pinchart+renesas@ideasonboard.com, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-imx@nxp.com, peter.chen@nxp.com Subject: [PATCH v6 1/6] dt-bindings: usb: add documentation for typec switch simple driver Date: Mon, 23 Nov 2020 22:01:31 +0800 Message-Id: <1606140096-1382-1-git-send-email-jun.li@nxp.com> X-Mailer: git-send-email 2.7.4 X-Originating-IP: [119.31.174.66] X-ClientProxiedBy: SG2PR06CA0164.apcprd06.prod.outlook.com (2603:1096:1:1e::18) To VE1PR04MB6528.eurprd04.prod.outlook.com (2603:10a6:803:127::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.66) by SG2PR06CA0164.apcprd06.prod.outlook.com (2603:1096:1:1e::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3589.20 via Frontend Transport; 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Signed-off-by: Li Jun Acked-by: Heikki Krogerus Acked-by: Heikki Krogerus --- changes for v6: - Use general mux bindings for typec switch, one typec switch may have 1 or 2 GPIOs for channel selection, if 1 GPIO, only can be used to select cc1 or cc2; if 2 GPIOs, the second GPIO can be used to deselect both channels or keep normal operations. - Add one more connection to usb controller. No changes for v5. changes on v4: - Use compatible instead of bool property for switch matching. - Change switch GPIO to be switch simple. - Change the active channel selection GPIO to be optional. previous discussion: http://patchwork.ozlabs.org/patch/1054342/ .../bindings/usb/typec-switch-simple.yaml | 122 +++++++++++++++++++++ 1 file changed, 122 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/typec-switch-simple.yaml b/Documentation/devicetree/bindings/usb/typec-switch-simple.yaml new file mode 100644 index 0000000..030ade5 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/typec-switch-simple.yaml @@ -0,0 +1,122 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/usb/typec-switch-simple.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Typec Orientation Switch Simple Solution Bindings + +maintainers: + - Li Jun + +description: |- + USB SuperSpeed (SS) lanes routing to which side of typec connector is + decided by orientation, this maybe achieved by some simple control like + GPIO toggle. + +properties: + compatible: + const: typec-orientation-switch + + '#mux-control-cells': + const: 0 + + switch-gpios: + description: | + GPIO specifiers to select the target channel of mux. + The first GPIO is for cc1 and cc2 selection, the GPIO flag use + GPIO_ACTIVE_HIGH if GPIO physical state high is for cc1; or use + GPIO_ACTIVE_LOW if GPIO physical state low is for cc1. + The second gpio is to deselect any channles by places all channels + in high-impedance state to reduce current consumption, the gpio flag + use GPIO_ACTIVE_HIGH if GPIO physical state high is for + high-impedance state (so low for normal operations); or Use + GPIO_ACTIVE_LOW if GPIO physical state low is for high-impedance + state(so high for normal operations). + minItems: 1 + maxItems: 2 + + idle-state: + description: -| + For TYPEC_ORIENTATION_NONE by deselect both channels if supported. + const: 2 + + # Standard properties described in + # Documentation/devicetree/bindings/mux/mux-controller.txt + + port: + type: object + additionalProperties: false + description: -| + Connection to the remote endpoint using OF graph bindings that model + SS data bus to typec connector. + + properties: + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + endpoint@0: + type: object + description: Endpoint connected to typec connector. + additionalProperties: false + + properties: + reg: + const: 0 + remote-endpoint: true + + required: + - remote-endpoint + + endpoint@1: + type: object + description: Endpoint connected to usb controller. + additionalProperties: false + + properties: + reg: + const: 1 + remote-endpoint: true + + required: + - remote-endpoint + + required: + - endpoint@0 + +required: + - compatible + - port + +additionalProperties: false + +examples: + - | + #include + typec_switch: mux-controller { + compatible = "typec-orientation-switch"; + #mux-control-cells = <0>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_ss_sel>; + switch-gpios = <&gpio3 15 GPIO_ACTIVE_HIGH>, + <&gpio2 20 GPIO_ACTIVE_HIGH>; + idle-state = <2>; + + port { + #address-cells = <1>; + #size-cells = <0>; + + usb3_orien_sel: endpoint@0 { + reg = <0>; + remote-endpoint = <&typec_con_ss>; + }; + + usb3_con_data: endpoint@1 { + reg = <1>; + remote-endpoint = <&dwc3_0>; + }; + }; + };