From patchwork Wed Feb 21 11:56:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Xiwen via B4 Relay X-Patchwork-Id: 204189 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:693c:2685:b0:108:e6aa:91d0 with SMTP id mn5csp985773dyc; Wed, 21 Feb 2024 03:57:27 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCW1LyUDN9XjscnMWR+iG+XO1PVHQ4nPYwHTxDlo5l1q8yyjyNym+oibclUjcFk+rZp9i8LPq4CZwGGeR7vIBja3a2BGnQ== X-Google-Smtp-Source: AGHT+IHer/IAFDHNMho1CQlsSo5ebH6ANo+hliGgQk3VbPdg8HWyLJKWfKUslxgTuDLBnZExny8I X-Received: by 2002:a17:906:fcca:b0:a3e:473e:26a0 with SMTP id qx10-20020a170906fcca00b00a3e473e26a0mr7724512ejb.51.1708516647407; Wed, 21 Feb 2024 03:57:27 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1708516647; cv=pass; d=google.com; s=arc-20160816; b=XAuxJjzqIZDJDw3dtSIwyERrHvaO3SqDqCaOlIPRY6RlEpIrzWelyCkHJNJdKMylLR Nl9iQX7NCLtnL1aFVa3i2FNZcsqjTYSfX5DGQLP2zTQXrbXs2EPLlPCmoHAgWszjhZFb iHu7zAXZoN/6Gs2Gcn3eUvfAHBRnXPrdrQz9G6EQa32co4QrKekBVYSJZG1Jpo1X1B+N VTLp+QrTbk5K6ZvPJVWAZPOBAbf3ymCVoRquNUHyr5gAY7QIYonfA9IblCbmVI5F4uQQ 8S0MW2iWpv2EXJ/GX7L4YivzyMLd5nwXMlFQKVPC22eSRcs0ZtQz5AwFZBfOIO2O0M9N 08DA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=reply-to:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:subject:date:from:dkim-signature; bh=gKLeqR7do6AeGt6l/PVI/x3woh6kVDVvW+ApH2LVkO8=; fh=gkGIeoKe5X+P2i87mcwuwbofefU8C2UOgmWurLgHJEQ=; b=vcFdrGnXDP6j+3TD0snd1pp+vTnwnVnSz25rfuGTiVFpDUK2sBPN63fA7WVP6ePOV3 4SFnkaS9/z5EQPIAPR3WWfl1UltSVWCB/1tKZesIhgsAbkgNHxsMYXhxzmP1tBaR6iRt DICJQp0wbl8kL4O93sQezIJO+0Ay5IctogA/HRaCw1nyQCfrYjqQxW3MlPvdET7uElJP M1B+3/qH4oz9gAbjxwAYiDWKJ7cosAFDCrWp4Pkh50ZeC3hF1MPlpWp6rh2/ACxoivVs hlhjkXXgefTeSiopzzjZO6SxnlFsht0jO7MRmQvBdydUNUwS3CVxQl9bB4ZU5XA6bFOk yyEw==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=gQpT880s; arc=pass (i=1 dkim=pass dkdomain=kernel.org); spf=pass (google.com: domain of linux-kernel+bounces-74668-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-74668-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from am.mirrors.kernel.org (am.mirrors.kernel.org. [2604:1380:4601:e00::3]) by mx.google.com with ESMTPS id q14-20020a170906b28e00b00a3e616725bdsi3211369ejz.825.2024.02.21.03.57.27 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Feb 2024 03:57:27 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-74668-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=gQpT880s; arc=pass (i=1 dkim=pass dkdomain=kernel.org); spf=pass (google.com: domain of linux-kernel+bounces-74668-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-74668-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id 0B5341F22759 for ; Wed, 21 Feb 2024 11:57:27 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D8F524D5A1; Wed, 21 Feb 2024 11:56:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gQpT880s" Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3EF5D482D8; Wed, 21 Feb 2024 11:56:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708516606; cv=none; b=kW0zCu03q404/nFLkSVUabgFtIpCXAQ88g7t5NWQ0Q3QXe/pwOGziVimtiWGo+hT/IwTRrY65K4pqiz7vSEGDeJSR0PNDUT8wq7bW8vxCjQZyt3h5WUtSLhNhZS5dmHOhumi7lby35zF/mn1jHx8iugdVJbXTByibEmNlLqZ6SY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708516606; c=relaxed/simple; bh=Dr9OQrUqQG/6MBjESHU6+3PVn2jjS861J9aFbtcZVq4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=bcAlSJAMdrRclCQTi11AA16ZkVFY8iw91qrWvarTf/lFcxBSfzXpGqwEDywh6LIbteweWWgkInKk+FcZb4uyx45r1bSnlQ+Yhkh7/L440m2XgmZJ9HM0vp1cTxzEWsKlHxIToE3mdm8Q6meJmm1ehre2X+uo7KDv2MtJcK+f/bw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gQpT880s; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPS id CEB79C433F1; Wed, 21 Feb 2024 11:56:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708516605; bh=Dr9OQrUqQG/6MBjESHU6+3PVn2jjS861J9aFbtcZVq4=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=gQpT880sjW3T+moOLdRPm4D/qZbYsY0ogJJyEKz2C2nNCuaEt5tJr48ZLqoPqTaEp CZBVoiKt9MkSe3dlNewYw2ku1kdgBk1xKJvU3z6dM9k7SwNtEpNjCDhRv64YQ1lOOy IfCRH+ZkaIigSizzaBsw9SN/92ES4abREtIndl+8lrePmG5JUmKD7D/GPjeXkMOfBh +HC3+aRPnAiJmphhCK2OW8frk3fvgKmdcLhJwZ4vFM1jSnr/yMzsh2OJrqKglbGOgZ TgK2O4X77zXMeGoz+xX3veUkBVu3RjlDm5zj5FqAJcgigozQV53y+IQGvs25PeWdac ppUgUz01ERzug== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id A37F0C48BF6; Wed, 21 Feb 2024 11:56:45 +0000 (UTC) From: Yang Xiwen via B4 Relay Date: Wed, 21 Feb 2024 19:56:41 +0800 Subject: [PATCH v3 1/2] watchdog: sp805_wdt: deassert the reset if available Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240221-hisi-wdt-v3-1-9642613dc2e6@outlook.com> References: <20240221-hisi-wdt-v3-0-9642613dc2e6@outlook.com> In-Reply-To: <20240221-hisi-wdt-v3-0-9642613dc2e6@outlook.com> To: Wim Van Sebroeck , Guenter Roeck , Philipp Zabel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Viresh Kumar Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Yang Xiwen X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=ed25519-sha256; t=1708516604; l=1308; i=forbidden405@outlook.com; s=20230724; h=from:subject:message-id; bh=Yulf71GztXVGablEgkhT6BHnqYqWblq9L42vUSDAg9k=; b=+BBcG1xmGtzehN6g+Xwdx1UJPNgY6Spl76NJKL/19umtdnMNqtXf/NjvXINZy1aot1GKR3UgT 5vXzcsBnhRuCceep7KHoaoAakAuReSP6/t0rNrqDPmpqBKs3CU+rMjj X-Developer-Key: i=forbidden405@outlook.com; a=ed25519; pk=qOD5jhp891/Xzc+H/PZ8LWVSWE3O/XCQnAg+5vdU2IU= X-Endpoint-Received: by B4 Relay for forbidden405@outlook.com/20230724 with auth_id=67 X-Original-From: Yang Xiwen Reply-To: X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791509551849861219 X-GMAIL-MSGID: 1791509551849861219 From: Yang Xiwen According to the datasheet, the core has an WDOGRESn input signal that needs to be deasserted before being operational. Implement it in the driver. Signed-off-by: Yang Xiwen Reviewed-by: Philipp Zabel Reviewed-by: Guenter Roeck --- drivers/watchdog/sp805_wdt.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c index 2756ed54ca3d..109e2e37e8f0 100644 --- a/drivers/watchdog/sp805_wdt.c +++ b/drivers/watchdog/sp805_wdt.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -232,6 +233,7 @@ static int sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id) { struct sp805_wdt *wdt; + struct reset_control *rst; u64 rate = 0; int ret = 0; @@ -264,6 +266,12 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id) return -ENODEV; } + rst = devm_reset_control_get_optional_exclusive(&adev->dev, NULL); + if (IS_ERR(rst)) + return dev_err_probe(&adev->dev, PTR_ERR(rst), "Can not get reset\n"); + + reset_control_deassert(rst); + wdt->adev = adev; wdt->wdd.info = &wdt_info; wdt->wdd.ops = &wdt_ops;