From patchwork Mon Feb 21 09:50:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Jacques Hiblot X-Patchwork-Id: 12753392 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F261C4167B for ; Mon, 21 Feb 2022 10:31:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354666AbiBUKbo (ORCPT ); Mon, 21 Feb 2022 05:31:44 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:45322 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354834AbiBUKa2 (ORCPT ); Mon, 21 Feb 2022 05:30:28 -0500 Received: from smtpout1.mo528.mail-out.ovh.net (smtpout1.mo528.mail-out.ovh.net [46.105.34.251]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 217D263EE; Mon, 21 Feb 2022 01:51:39 -0800 (PST) Received: from pro2.mail.ovh.net (unknown [10.108.1.79]) by mo528.mail-out.ovh.net (Postfix) with ESMTPS id CC381E72481C; Mon, 21 Feb 2022 10:51:09 +0100 (CET) Received: from localhost.localdomain (88.125.132.78) by DAG1EX2.emp2.local (172.16.2.2) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Mon, 21 Feb 2022 10:51:08 +0100 From: Jean-Jacques Hiblot To: , , Wim Van Sebroeck , Guenter Roeck , Magnus Damm , Rob Herring , Wolfram Sang CC: Jean-Jacques Hiblot , , , Subject: [PATCH v3 0/5] ARM: r9a06g032: add support for the watchdogs Date: Mon, 21 Feb 2022 10:50:26 +0100 Message-ID: <20220221095032.95054-1-jjhiblot@traphandler.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [88.125.132.78] X-ClientProxiedBy: CAS3.emp2.local (172.16.1.3) To DAG1EX2.emp2.local (172.16.2.2) X-Ovh-Tracer-Id: 6957217000239806939 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvvddrkeeigddtkecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvffufffkofgggfgtihesthekredtredttdenucfhrhhomheplfgvrghnqdflrggtqhhuvghsucfjihgslhhothcuoehjjhhhihgslhhothesthhrrghphhgrnhgulhgvrhdrtghomheqnecuggftrfgrthhtvghrnhepjedugfffleelheehveevuedtjeffgfejkedukeekudfguedtfeefuefhueevheeinecuffhomhgrihhnpehgihhthhhusgdrtghomhenucfkpheptddrtddrtddrtddpkeekrdduvdehrddufedvrdejkeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhhouggvpehsmhhtphhouhhtpdhhvghlohepphhrohdvrdhmrghilhdrohhvhhdrnhgvthdpihhnvghtpedtrddtrddtrddtpdhmrghilhhfrhhomhepjhhjhhhisghlohhtsehtrhgrphhhrghnughlvghrrdgtohhmpdhnsggprhgtphhtthhopedupdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhg Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Hi all, This series adds support for the watchdog timers of the RZ/N1. The watchdog driver (rzn1-wdt.c) is derived from the driver available at https://github.com/renesas-rz/rzn1_linux.git with a few modifications In order to be able to reset the board when a watchdog timer expires, the RSTEN register must be configured. it is the responsability of the bootloader to set those bits (or not, depending on the chosen policy). If the watchdog reset source is not enabled, an interrupt is triggered when the watchdog expires. Currently this interrupt doesn't much apart from printing a message. Changes v2 -> v3: * dts: changed compatible strings to include "renesas,r9a06g032-wdt" and "renesas,rzn1-wdt". * driver: removed the SOC-specific "renesas,r9a06g032-wdt". * removed all the changes in the clock driver: the watchdog reset source are not disabled anymore when the machine is halted. * fixed the clock rate type in the computations. * removed unnecessary printout and call to clk_disable_unprepare() in the driver probe(). Changes v1 -> v2: * Modified the clock driver to not enable the watchdog reset sources. On other renesas platforms, those bits are by the bootloader. The watchdog reset sources are still disabled when the platform is halted to prevent a watchdog reset. * Added a SOC-specific compatible "renesas,r9a06g032-wdt" * reordered the dts/i entries * default timeout is 60 seconds * reworked the probe function of the wdt driver to better error cases * removed the set_timeout() and use a fixed period computed in probe(). This removes the confusion and makes it clear that the period defined by the user space in indeed handled by the watchdog core Jean-Jacques Hiblot (4): dt-bindings: clock: r9a06g032: Add the definition of the watchdog clock dt-bindings: watchdog: renesas,wdt: Add support for RZ/N1 ARM: dts: r9a06g032: Add the watchdog nodes ARM: dts: r9a06g032-rzn1d400-db: Enable watchdog0 with a 60s timeout Phil Edworthy (1): watchdog: Add Renesas RZ/N1 Watchdog driver .../bindings/watchdog/renesas,wdt.yaml | 6 + arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts | 5 + arch/arm/boot/dts/r9a06g032.dtsi | 16 ++ drivers/watchdog/Kconfig | 8 + drivers/watchdog/Makefile | 1 + drivers/watchdog/rzn1_wdt.c | 206 ++++++++++++++++++ include/dt-bindings/clock/r9a06g032-sysctrl.h | 1 + 7 files changed, 243 insertions(+) create mode 100644 drivers/watchdog/rzn1_wdt.c