From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753166AbeDKJtD (ORCPT ); Wed, 11 Apr 2018 05:49:03 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:49329 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752942AbeDKJry (ORCPT ); Wed, 11 Apr 2018 05:47:54 -0400 From: Amelie Delaunay To: Linus Walleij , Rob Herring , Mark Rutland , Russell King , Alexandre Torgue , "Maxime Coquelin" CC: , , , , "Lee Jones" , Amelie Delaunay Subject: [PATCH 1/5] dt-bindings: pinctrl: document the STMFX pinctrl bindings Date: Wed, 11 Apr 2018 11:47:01 +0200 Message-ID: <1523440025-18077-2-git-send-email-amelie.delaunay@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1523440025-18077-1-git-send-email-amelie.delaunay@st.com> References: <1523440025-18077-1-git-send-email-amelie.delaunay@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.201.20.5] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-04-11_05:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds documentation of device tree bindings for the STMicroelectronics Multi-Function eXpander (STMFX) GPIO expander. Signed-off-by: Amelie Delaunay --- .../devicetree/bindings/pinctrl/pinctrl-stmfx.txt | 118 +++++++++++++++++++++ 1 file changed, 118 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/pinctrl-stmfx.txt diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-stmfx.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-stmfx.txt new file mode 100644 index 0000000..4d8941de --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-stmfx.txt @@ -0,0 +1,118 @@ +STMicroelectronics Multi-Function eXpander (STMFX) GPIO expander bindings + +ST Multi-Function eXpander (STMFX) is a slave controller using I2C for +communication with the main MCU. It offers up to 24 GPIOs expansion. + +Required properties: +- compatible: should be "st,stmfx-0300". +- reg: I2C slave address of the device. +- interrupt-parent: phandle of the STMFX parent interrupt controller. +- interrutps: interrupt specifier triggered by MFX_IRQ_OUT signal. + +Optional property: +- drive-open-drain: configure MFX_IRQ_OUT as open drain. +- vdd-supply: phandle of the regulator supplying STMFX. + +Required properties for gpio controller sub-node: +- #gpio-cells: should be <2>, the first cell is the GPIO number and the second + cell is the gpio flags in accordance with . +- gpio-controller: marks the device as a GPIO controller. +Please refer to ../gpio/gpio.txt. + +Optional properties for gpio controller sub-node: +- #interrupt-cells: should be <2>, the first cell is the GPIO number and the + second cell is the interrupt flags in accordance with + . +- interrupt-controller: marks the device as an interrupt controller. + +Please refer to pinctrl-bindings.txt for pin configuration. + +Required properties for pin configuration sub-nodes: +- pins: list of pins to which the configuration applies. + +Optional properties for pin configuration sub-nodes (pinconf-generic ones): +- bias-disable: disable any bias on the pin. +- bias-pull-up: the pin will be pulled up. +- bias-pull-pin-default: use the pin-default pull state. +- bias-pull-down: the pin will be pulled down. +- drive-open-drain: the pin will be driven with open drain. +- drive-push-pull: the pin will be driven actively high and low. +- output-high: the pin will be configured as an output driving high level. +- output-low: the pin will be configured as an output driving low level. + +Note that STMFX pins[15:0] are called "gpio[15:0]", and STMFX pins[23:16] are +called "agpio[7:0]". Example, to refer to pin 18 of STMFX, use "agpio2". + +Example: + + stmfxpinctrl: stmfx@42 { + compatible = "st,stmfx-0300"; + reg = <0x42>; + interrupt-parent = <&gpioi>; + interrupts = <8 IRQ_TYPE_EDGE_RISING>; + vdd-supply = <&v3v3>; + status = "okay"; + + stmfxgpio: gpio { + #gpio-cells = <2>; + #interrupt-cells = <2>; + gpio-controller; + interrupt-controller; + status = "okay"; + }; + + joystick_pins: joystick@0 { + pins = "gpio0", "gpio1", "gpio2", "gpio3", "gpio4"; + drive-push-pull; + bias-pull-down; + }; + }; + + joystick { + compatible = "gpio-keys"; + #address-cells = <1>; + #size-cells = <0>; + pinctrl-0 = <&joystick_pins>; + pinctrl-names = "default"; + button@0 { + label = "JoySel"; + linux,code = ; + interrupt-parent = <&stmfxgpio>; + interrupts = <0 IRQ_TYPE_EDGE_RISING>; + }; + button@1 { + label = "JoyDown"; + linux,code = ; + interrupt-parent = <&stmfxgpio>; + interrupts = <1 IRQ_TYPE_EDGE_RISING>; + }; + button@2 { + label = "JoyLeft"; + linux,code = ; + interrupt-parent = <&stmfxgpio>; + interrupts = <2 IRQ_TYPE_EDGE_RISING>; + }; + button@3 { + label = "JoyRight"; + linux,code = ; + interrupt-parent = <&stmfxgpio>; + interrupts = <3 IRQ_TYPE_EDGE_RISING>; + }; + button@4 { + label = "JoyUp"; + linux,code = ; + interrupt-parent = <&stmfxgpio>; + interrupts = <4 IRQ_TYPE_EDGE_RISING>; + }; + }; + + leds { + compatible = "gpio-leds"; + orange { + gpios = <&stmfxgpio 17 1>; + }; + + blue { + gpios = <&stmfxgpio 19 1>; + }; + } -- 2.7.4