From patchwork Fri Jun 12 17:13:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 214898 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 D6F14C433E0 for ; Fri, 12 Jun 2020 17:14:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BDFF520882 for ; Fri, 12 Jun 2020 17:14:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726568AbgFLROj (ORCPT ); Fri, 12 Jun 2020 13:14:39 -0400 Received: from mx2.suse.de ([195.135.220.15]:50472 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726302AbgFLRNp (ORCPT ); Fri, 12 Jun 2020 13:13:45 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 86277AED8; Fri, 12 Jun 2020 17:13:47 +0000 (UTC) From: Nicolas Saenz Julienne To: f.fainelli@gmail.com, gregkh@linuxfoundation.org, wahrenst@gmx.net, p.zabel@pengutronix.de, linux-kernel@vger.kernel.org, Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com, Nicolas Saenz Julienne , Eric Anholt Cc: linux-usb@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, tim.gover@raspberrypi.org, linux-pci@vger.kernel.org, helgaas@kernel.org, andy.shevchenko@gmail.com, mathias.nyman@linux.intel.com, lorenzo.pieralisi@arm.com, Rob Herring , devicetree@vger.kernel.org Subject: [PATCH v3 1/9] dt-bindings: reset: Add a binding for the RPi Firmware reset controller Date: Fri, 12 Jun 2020 19:13:25 +0200 Message-Id: <20200612171334.26385-2-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200612171334.26385-1-nsaenzjulienne@suse.de> References: <20200612171334.26385-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The firmware running on the RPi VideoCore can be used to reset and initialize HW controlled by the firmware. Signed-off-by: Nicolas Saenz Julienne Reviewed-by: Florian Fainelli --- Changes since v2: - Add include file for reset IDs Changes since v1: - Correct cells binding as per Florian's comment - Change compatible string to be more generic .../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 21 +++++++++++++++++++ .../reset/raspberrypi,firmware-reset.h | 13 ++++++++++++ 2 files changed, 34 insertions(+) create mode 100644 include/dt-bindings/reset/raspberrypi,firmware-reset.h diff --git a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml index b48ed875eb8e..23a885af3a28 100644 --- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml +++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml @@ -39,6 +39,22 @@ properties: - compatible - "#clock-cells" + reset: + type: object + + properties: + compatible: + const: raspberrypi,firmware-reset + + "#reset-cells": + const: 1 + description: > + The argument is the ID of the firmware reset line to affect. + + required: + - compatible + - "#reset-cells" + additionalProperties: false required: @@ -55,5 +71,10 @@ examples: compatible = "raspberrypi,firmware-clocks"; #clock-cells = <1>; }; + + reset: reset { + compatible = "raspberrypi,firmware-reset"; + #reset-cells = <1>; + }; }; ... diff --git a/include/dt-bindings/reset/raspberrypi,firmware-reset.h b/include/dt-bindings/reset/raspberrypi,firmware-reset.h new file mode 100644 index 000000000000..1a4f4c792723 --- /dev/null +++ b/include/dt-bindings/reset/raspberrypi,firmware-reset.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2020 Nicolas Saenz Julienne + * Author: Nicolas Saenz Julienne + */ + +#ifndef _DT_BINDINGS_RASPBERRYPI_FIRMWARE_RESET_H +#define _DT_BINDINGS_RASPBERRYPI_FIRMWARE_RESET_H + +#define RASPBERRYPI_FIRMWARE_RESET_ID_USB 0 +#define RASPBERRYPI_FIRMWARE_RESET_NUM_IDS 1 + +#endif