From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_HI,T_RP_MATCHES_RCVD autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 0FAAA7E6B7 for ; Fri, 23 Mar 2018 11:01:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755996AbeCWLAz (ORCPT ); Fri, 23 Mar 2018 07:00:55 -0400 Received: from mail.bootlin.com ([62.4.15.54]:43960 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755966AbeCWLAp (ORCPT ); Fri, 23 Mar 2018 07:00:45 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id 30934208A6; Fri, 23 Mar 2018 12:00:40 +0100 (CET) Received: from localhost.localdomain (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.bootlin.com (Postfix) with ESMTPSA id 55F12208A9; Fri, 23 Mar 2018 12:00:29 +0100 (CET) From: Boris Brezillon To: Wolfram Sang , linux-i2c@vger.kernel.org, Jonathan Corbet , linux-doc@vger.kernel.org, Greg Kroah-Hartman , Arnd Bergmann Cc: Przemyslaw Sroka , Arkadiusz Golec , Alan Douglas , Bartosz Folta , Damian Kos , Alicja Jurasik-Urbaniak , Cyprian Wronka , Suresh Punnoose , Rafal Ciepiela , Thomas Petazzoni , Nishanth Menon , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Vitor Soares , Geert Uytterhoeven , Linus Walleij , Xiang Lin , linux-gpio@vger.kernel.org, Boris Brezillon Subject: [PATCH v3 11/11] dt-bindings: gpio: Add bindings for Cadence I3C gpio expander Date: Fri, 23 Mar 2018 12:00:20 +0100 Message-Id: <20180323110020.19080-12-boris.brezillon@bootlin.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180323110020.19080-1-boris.brezillon@bootlin.com> References: <20180323110020.19080-1-boris.brezillon@bootlin.com> Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Document the Cadence I3C gpio expander bindings. Signed-off-by: Boris Brezillon --- .../devicetree/bindings/gpio/gpio-cdns-i3c.txt | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-cdns-i3c.txt diff --git a/Documentation/devicetree/bindings/gpio/gpio-cdns-i3c.txt b/Documentation/devicetree/bindings/gpio/gpio-cdns-i3c.txt new file mode 100644 index 000000000000..634b1f268215 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-cdns-i3c.txt @@ -0,0 +1,38 @@ +* Cadence I3C GPIO expander + +The Cadence I3C GPIO expander provides 8 GPIOs controllable over I3C. +This GPIOs can be configured in output or input mode and if they are in input +mode they can generate IBIs (In Band Interrupts). + +Required properties for GPIO node: +- reg : 3 cells encoding the I3C static address (none in our case) and the I3C + Provisional ID. See Documentation/devicetree/bindings/i3c/i3c.txt for + more details. + Should be <0x0 0x392 0x0>. +- gpio-controller : Marks the device node as a gpio controller. +- #gpio-cells : Should be two. The first cell is the pin number and + the second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low +- interrupt-controller: Marks the device node as an interrupt controller. +- #interrupt-cells : Should be 2. The first cell is the GPIO number. + The second cell bits[3:0] is used to specify trigger type and level flags: + 1 = low-to-high edge triggered. + 2 = high-to-low edge triggered. + 3 = triggered on both edges. + 4 = active high level-sensitive. + 8 = active low level-sensitive. + +Example: + + i3c-master@xxx { + ... + i3c_gpio_expander: gpio@0,1c9,0 { + reg = <0 0x392 0x0>; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + }; + ... + }; -- 2.14.1 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html