From patchwork Mon Mar 15 19:08:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sander Vanheule X-Patchwork-Id: 400638 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B53EC4332D for ; Mon, 15 Mar 2021 19:09:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A47664F4C for ; Mon, 15 Mar 2021 19:09:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233086AbhCOTIp (ORCPT ); Mon, 15 Mar 2021 15:08:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233163AbhCOTIb (ORCPT ); Mon, 15 Mar 2021 15:08:31 -0400 Received: from polaris.svanheule.net (polaris.svanheule.net [IPv6:2a00:c98:2060:a004:1::200]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FE9BC06174A for ; Mon, 15 Mar 2021 12:08:30 -0700 (PDT) Received: from terra.local.svanheule.net (unknown [IPv6:2a02:a03f:eaff:9701:b4db:50a7:6f83:328f]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: sander@svanheule.net) by polaris.svanheule.net (Postfix) with ESMTPSA id 2DBB21DE336; Mon, 15 Mar 2021 20:08:29 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svanheule.net; s=mail1707; t=1615835309; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Hbhhx9VKQMwSg1Od1F6afQRKhVgm7ScrAtFwuLoSS6A=; b=hZpHZLcHQps0vE+XiumZatcAtYvrPHh2UstyZ1Yaqej9faV3se7Pt1WhNczw85ye1i/ZkR SI/qbmdMiFWrvDbSbE669C6vdkJnmia7tvCZD5SyXinEkpx3xmfuQbroqdKjSZwPE8wRJT ZMOjqquvVBgLcuBkQWl7xB0aYhvqw7FBHbVhvBNMmyaEOMhrLNs7uAfmT45gjZd0XdU+t/ jOlgazl+Mu8SmbZu139EfXrBcl2ClXAzlxHhNEP/xtMNgt5Uyo/r57KAXIopBHMyB02W1A F4OjtIyFq5HUdUuhPHsfSYeaAQKx4CFVRe1O8kXuYKGKIfz2Xx4tiVe6T0bTXg== From: Sander Vanheule To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org Cc: Linus Walleij , Bartosz Golaszewski , Rob Herring , Thomas Gleixner , Marc Zyngier , linux-kernel@vger.kernel.org, Sander Vanheule , bert@biot.com Subject: [PATCH v2 1/2] dt-bindings: gpio: Binding for Realtek Otto GPIO Date: Mon, 15 Mar 2021 20:08:05 +0100 Message-Id: <20210315190806.66762-2-sander@svanheule.net> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315190806.66762-1-sander@svanheule.net> References: <20210315082339.9787-1-sander@svanheule.net> <20210315190806.66762-1-sander@svanheule.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add a binding description for Realtek's GPIO controller found on several of their MIPS-based SoCs (codenamed Otto), such as the RTL838x and RTL839x series of switch SoCs. A fallback binding 'realtek,otto-gpio' is provided for cases where the actual port ordering is not known yet, and enabling the interrupt controller may result in uncaught interrupts. Signed-off-by: Sander Vanheule Reviewed-by: Linus Walleij --- .../bindings/gpio/gpio-realtek-otto.yaml | 80 +++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml diff --git a/Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml b/Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml new file mode 100644 index 000000000000..3e8151e3a169 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml @@ -0,0 +1,80 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/gpio/gpio-realtek-otto.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Realtek Otto GPIO controller + +maintainers: + - Sander Vanheule + - Bert Vermeulen + +description: | + Realtek's GPIO controller on their MIPS switch SoCs (Otto platform) consists + of two banks of 32 GPIOs. These GPIOs can generate edge-triggered interrupts. + Each bank's interrupts are cascased into one interrupt line on the parent + interrupt controller, if provided. + This binding allows defining a single bank in the devicetree. The interrupt + controller is not supported on the fallback compatible name, which only + allows for GPIO port use. + +properties: + $nodename: + pattern: "^gpio@[0-9a-f]+$" + + compatible: + oneOf: + - items: + - enum: + - realtek,rtl8380-gpio + - realtek,rtl8390-gpio + - const: realtek,otto-gpio + - const: realtek,otto-gpio + + reg: + maxItems: 1 + + "#gpio-cells": + const: 2 + + gpio-controller: true + + ngpios: + minimum: 1 + maximum: 32 + + interrupt-controller: true + + "#interrupt-cells": + const: 2 + + interrupts: + maxItems: 1 + +required: + - compatible + - reg + - "#gpio-cells" + - gpio-controller + +additionalProperties: false + +dependencies: + interrupt-controller: [ interrupts ] + +examples: + - | + gpio@3500 { + compatible = "realtek,rtl8380-gpio", "realtek,otto-gpio"; + reg = <0x3500 0x1c>; + gpio-controller; + #gpio-cells = <2>; + ngpios = <24>; + interrupt-controller; + #interrupt-cells = <2>; + interrupt-parent = <&rtlintc>; + interrupts = <23>; + }; + +...