From patchwork Tue May 18 07:44:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 12264029 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9AF4C433ED for ; Tue, 18 May 2021 07:45:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B4678611BF for ; Tue, 18 May 2021 07:45:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347250AbhERHqT (ORCPT ); Tue, 18 May 2021 03:46:19 -0400 Received: from muru.com ([72.249.23.125]:57058 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347243AbhERHqP (ORCPT ); Tue, 18 May 2021 03:46:15 -0400 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id E811580F5; Tue, 18 May 2021 07:44:55 +0000 (UTC) From: Tony Lindgren To: Bin Liu , Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-omap@vger.kernel.org Subject: [PATCH] usb: musb: Add missing PM suspend and resume functions for 2430 glue Date: Tue, 18 May 2021 10:44:49 +0300 Message-Id: <20210518074449.17070-1-tony@atomide.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Looks like we are missing suspend and resume functions for pm_ops that are needed to idle the hardware for system suspend for 2430 glue layer. We can rely on the driver internal PM runtime state, and call driver functions to idle the hardware on suspend if needed. There is no need to add a dependency to PM runtime for system suspend here. Signed-off-by: Tony Lindgren --- drivers/usb/musb/omap2430.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -33,6 +33,8 @@ struct omap2430_glue { enum musb_vbus_id_status status; struct work_struct omap_musb_mailbox_work; struct device *control_otghs; + unsigned int is_runtime_suspended:1; + unsigned int needs_resume:1; }; #define glue_to_musb(g) platform_get_drvdata(g->musb) @@ -459,6 +461,8 @@ static int omap2430_runtime_suspend(struct device *dev) phy_power_off(musb->phy); phy_exit(musb->phy); + glue->is_runtime_suspended = 1; + return 0; } @@ -480,12 +484,40 @@ static int omap2430_runtime_resume(struct device *dev) /* Wait for musb to get oriented. Otherwise we can get babble */ usleep_range(200000, 250000); + glue->is_runtime_suspended = 0; + return 0; } +static int omap2430_suspend(struct device *dev) +{ + struct omap2430_glue *glue = dev_get_drvdata(dev); + + if (glue->is_runtime_suspended) + return 0; + + glue->needs_resume = 1; + + return omap2430_runtime_suspend(dev); +} + +static int omap2430_resume(struct device *dev) +{ + struct omap2430_glue *glue = dev_get_drvdata(dev); + + if (!glue->needs_resume) + return 0; + + glue->needs_resume = 0; + + return omap2430_runtime_resume(dev); +} + static const struct dev_pm_ops omap2430_pm_ops = { .runtime_suspend = omap2430_runtime_suspend, .runtime_resume = omap2430_runtime_resume, + .suspend = omap2430_suspend, + .resume = omap2430_resume, }; #define DEV_PM_OPS (&omap2430_pm_ops)