From patchwork Thu Mar 7 15:42:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabien DESSENNE X-Patchwork-Id: 10843253 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 039C3180E for ; Thu, 7 Mar 2019 15:42:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E21CC2F3AB for ; Thu, 7 Mar 2019 15:42:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D5BC82F45A; Thu, 7 Mar 2019 15:42:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 79AEE2F3AB for ; Thu, 7 Mar 2019 15:42:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=E9YgOBNmQPnOgKBtgGlUvFxi50wBeS41kuVKcK0bwmA=; b=ubRNBvxosT/CY4 eEjn7MLB5eVndr4t6UV9ZllgstaUSl75xXIlbh+etPc/7uwyM/tx2BGTrBEdr6t46Q+3eP4OszlUu LlNYfxhivxfYrfOf7M3/Lg5OQHTG2mRIxtm/7udUZy8zfbTmHb+wtOGSFZly3i0jgMJNLi27q7bQO nXkF2s9Uz1z2/N8iZ1+uYLQuF6bxiYcUUZsbhkY4/ZzsLyjiuwl4dDyks51HGE74YeWQIa39TA1RI dsNO2uXEHS6aJerMz7KbEwd+Az6qkjlZo+Z0jMoOiZhZ0WGJdU30mk/K5XbVlQ0pSx7p4N55MRwOD XB45cXysaWdyjGgbyiCw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h1vAN-00017U-Fh; Thu, 07 Mar 2019 15:42:39 +0000 Received: from mx07-00178001.pphosted.com ([62.209.51.94]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h1vAJ-00016v-F1 for linux-arm-kernel@lists.infradead.org; Thu, 07 Mar 2019 15:42:37 +0000 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x27FVDpJ022558; Thu, 7 Mar 2019 16:42:29 +0100 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2r2ng25jcb-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Thu, 07 Mar 2019 16:42:29 +0100 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id AEA8A34; Thu, 7 Mar 2019 15:42:28 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 804B452B2; Thu, 7 Mar 2019 15:42:28 +0000 (GMT) Received: from SAFEX1HUBCAS23.st.com (10.75.90.47) by SAFEX1HUBCAS21.st.com (10.75.90.44) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 7 Mar 2019 16:42:28 +0100 Received: from localhost (10.129.4.33) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 7 Mar 2019 16:42:28 +0100 From: Fabien Dessenne To: Ohad Ben-Cohen , Bjorn Andersson , Maxime Coquelin , Alexandre Torgue , , , , Subject: [PATCH] hwspinlock: stm32: implement the relax() ops Date: Thu, 7 Mar 2019 16:42:16 +0100 Message-ID: <1551973336-23048-1-git-send-email-fabien.dessenne@st.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.129.4.33] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-03-07_08:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190307_074236_169284_162F04A2 X-CRM114-Status: UNSURE ( 9.47 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Benjamin Gaignard , Fabien Dessenne Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Implement this optional ops, called by hwspinlock core while spinning on a lock, between two successive invocations of trylock(). Signed-off-by: Fabien Dessenne Reviewed-by: Benjamin Gaignard --- drivers/hwspinlock/stm32_hwspinlock.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/hwspinlock/stm32_hwspinlock.c b/drivers/hwspinlock/stm32_hwspinlock.c index 4418392..c8eacf4 100644 --- a/drivers/hwspinlock/stm32_hwspinlock.c +++ b/drivers/hwspinlock/stm32_hwspinlock.c @@ -5,6 +5,7 @@ */ #include +#include #include #include #include @@ -42,9 +43,15 @@ static void stm32_hwspinlock_unlock(struct hwspinlock *lock) writel(STM32_MUTEX_COREID, lock_addr); } +static void stm32_hwspinlock_relax(struct hwspinlock *lock) +{ + ndelay(50); +} + static const struct hwspinlock_ops stm32_hwspinlock_ops = { .trylock = stm32_hwspinlock_trylock, .unlock = stm32_hwspinlock_unlock, + .relax = stm32_hwspinlock_relax, }; static int stm32_hwspinlock_probe(struct platform_device *pdev)