From patchwork Wed May 3 12:11:43 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Quentin Schulz X-Patchwork-Id: 98485 Delivered-To: patch@linaro.org Received: by 10.140.89.200 with SMTP id v66csp23779qgd; Wed, 3 May 2017 05:13:06 -0700 (PDT) X-Received: by 10.98.87.203 with SMTP id i72mr4584813pfj.151.1493813585921; Wed, 03 May 2017 05:13:05 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id w5si19761205pgb.341.2017.05.03.05.13.05; Wed, 03 May 2017 05:13:05 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751842AbdECMM2 (ORCPT + 25 others); Wed, 3 May 2017 08:12:28 -0400 Received: from mail.free-electrons.com ([62.4.15.54]:43709 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750966AbdECMMR (ORCPT ); Wed, 3 May 2017 08:12:17 -0400 Received: by mail.free-electrons.com (Postfix, from userid 110) id D467B207F7; Wed, 3 May 2017 14:12:15 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost.localdomain (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 9104E207EB; Wed, 3 May 2017 14:12:15 +0200 (CEST) From: Quentin Schulz To: wg@grandegger.com, mkl@pengutronix.de, mario.huettel@gmx.net, socketcan@hartkopp.net Cc: Quentin Schulz , linux-can@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, alexandre.belloni@free-electrons.com, thomas.petazzoni@free-electrons.com Subject: [PATCH 2/2] can: m_can: add deep Suspend/Resume support Date: Wed, 3 May 2017 14:11:43 +0200 Message-Id: <20170503121143.25090-2-quentin.schulz@free-electrons.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170503121143.25090-1-quentin.schulz@free-electrons.com> References: <20170503121143.25090-1-quentin.schulz@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This adds Power Management deep Suspend/Resume support for Bosch M_CAN chip. When the chip resumes from deep sleep, the RAM needs to be initialized as it is done when the driver probes. The net interface also needs to be closed and reopened to be fully functional. Signed-off-by: Quentin Schulz --- drivers/net/can/m_can/m_can.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) -- 2.11.0 diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 3f0445440146..9e0143b528f1 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -1670,12 +1670,10 @@ static __maybe_unused int m_can_suspend(struct device *dev) struct m_can_priv *priv = netdev_priv(ndev); if (netif_running(ndev)) { - netif_stop_queue(ndev); netif_device_detach(ndev); + m_can_close(ndev); } - /* TODO: enter low power */ - priv->can.state = CAN_STATE_SLEEPING; return 0; @@ -1686,13 +1684,13 @@ static __maybe_unused int m_can_resume(struct device *dev) struct net_device *ndev = dev_get_drvdata(dev); struct m_can_priv *priv = netdev_priv(ndev); - /* TODO: exit low power */ + m_can_init_ram(priv); priv->can.state = CAN_STATE_ERROR_ACTIVE; if (netif_running(ndev)) { + m_can_open(ndev); netif_device_attach(ndev); - netif_start_queue(ndev); } return 0;