From mboxrd@z Thu Jan 1 00:00:00 1970 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 59CFAC433F5 for ; Mon, 17 Jan 2022 16:08:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240742AbiAQQIu (ORCPT ); Mon, 17 Jan 2022 11:08:50 -0500 Received: from eu-shark1.inbox.eu ([195.216.236.81]:48054 "EHLO eu-shark1.inbox.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235180AbiAQQIu (ORCPT ); Mon, 17 Jan 2022 11:08:50 -0500 X-Greylist: delayed 448 seconds by postgrey-1.27 at vger.kernel.org; Mon, 17 Jan 2022 11:08:48 EST Received: from eu-shark1.inbox.eu (localhost [127.0.0.1]) by eu-shark1-out.inbox.eu (Postfix) with ESMTP id A7AE66C007B8; Mon, 17 Jan 2022 18:01:18 +0200 (EET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mail.ee; s=20150108; t=1642435278; bh=8eZy1CPKhQvMCMzsnEkM0QJ5WK+Ngz6mR4luFdgMGvc=; h=Date:From:To:Subject:Message-ID:Content-Type:X-ESPOL:from:date; b=jgOX3FcGFDjImxPXV4lSZmrIfpN+RYm1YiACSBUeOMlnuE+UVrisrt1qIe5hSobMB pRW7zoW0tBUSJWHIqydyNgGDLRFh6ToMfJwrueG4nRbBOJcOYlZ0dZ0l3h7tzI/5DP ifcZvpNKyCjvSBaiGp9cPvQomxhN83JtXteCIcvA= Received: from localhost (localhost [127.0.0.1]) by eu-shark1-in.inbox.eu (Postfix) with ESMTP id 984126C007B7; Mon, 17 Jan 2022 18:01:18 +0200 (EET) Received: from eu-shark1.inbox.eu ([127.0.0.1]) by localhost (eu-shark1.inbox.eu [127.0.0.1]) (spamfilter, port 35) with ESMTP id w-pItSQyIShD; Mon, 17 Jan 2022 18:01:18 +0200 (EET) Received: from mail.inbox.eu (eu-pop1 [127.0.0.1]) by eu-shark1-in.inbox.eu (Postfix) with ESMTP id 564D06C007A9; Mon, 17 Jan 2022 18:01:18 +0200 (EET) Date: Mon, 17 Jan 2022 19:01:12 +0300 From: Boris Lysov To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Missing ARM TWD Watchdog driver? Message-ID: <20220117190112.2b2c2f53@pc> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Virus-Scanned: OK X-ESPOL: 6N1mkJY3ejOnjUCgRn3ABwcxsStMXfGWiOrAsAEq4na6bm6YHDwAURW+m25+SXi8vSM= Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hello everyone, I stumbled upon the ARM TWD Watchdog driver which seems to be missing (or I'm just blind). As per commit a33f5c380c4bd3fa5278d690421b72052456d9fe ("Merge tag 'xfs-5.17-merge-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux"), multiple device trees declare usage of arm-twd: arch/arm/boot/dts/arm-realview-eb-mp.dtsi arch/arm/boot/dts/arm-realview-pb11mp.dts arch/arm/boot/dts/arm-realview-pbx-a9.dts arch/arm/boot/dts/bcm5301x.dtsi arch/arm/boot/dts/bcm63138.dtsi arch/arm/boot/dts/bcm-hr2.dtsi arch/arm/boot/dts/bcm-nsp.dtsi arch/arm/boot/dts/berlin2cd.dtsi arch/arm/boot/dts/highbank.dts arch/arm/boot/dts/mmp3.dtsi arch/arm/boot/dts/owl-s500.dtsi arch/arm/boot/dts/spear13xx.dtsi arch/arm/boot/dts/ste-dbx5x0.dtsi arch/arm/boot/dts/vexpress-v2p-ca5s.dts arch/arm/boot/dts/vexpress-v2p-ca9.dts and it is documented in Documentation/devicetree/bindings/watchdog/arm,twd-wdt.yaml However I could not find the driver itself. I tried running case-insensitive grep and ripgrep to no avail. Does this driver actually exist? Is it gone? I'm not well experienced with LKML yet and I apologize for if I asked the question on the inappropriate mailing list. As per 3.3 of [1], I'm kindly asking to CC me with answers. Thanks! [1] The linux-kernel mailing list FAQ http://vger.kernel.org/lkml/