From patchwork Thu Dec 12 21:45:55 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felipe Balbi X-Patchwork-Id: 3334621 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6913B9F399 for ; Thu, 12 Dec 2013 21:46:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7F6B7206B9 for ; Thu, 12 Dec 2013 21:46:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 867B5207B0 for ; Thu, 12 Dec 2013 21:46:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751717Ab3LLVqx (ORCPT ); Thu, 12 Dec 2013 16:46:53 -0500 Received: from comal.ext.ti.com ([198.47.26.152]:50915 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751535Ab3LLVqw (ORCPT ); Thu, 12 Dec 2013 16:46:52 -0500 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id rBCLkRTI015000; Thu, 12 Dec 2013 15:46:27 -0600 Received: from DLEE70.ent.ti.com (dlemailx.itg.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id rBCLkRex025611; Thu, 12 Dec 2013 15:46:27 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.2.342.3; Thu, 12 Dec 2013 15:46:27 -0600 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id rBCLkR1o008314; Thu, 12 Dec 2013 15:46:27 -0600 From: Felipe Balbi To: Linux USB Mailing List CC: , Linux ARM Kernel Mailing List , , Linux OMAP Mailing List , , Santosh Shilimkar , Felipe Balbi Subject: [PATCH v2 1/7] usb: dwc3: keystone: add basic PM support Date: Thu, 12 Dec 2013 15:45:55 -0600 Message-ID: <1386884755-12366-1-git-send-email-balbi@ti.com> X-Mailer: git-send-email 1.8.4.GIT In-Reply-To: <20131212214306.GS1939@saruman.home> References: <20131212214306.GS1939@saruman.home> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP A bare-minimum PM implementation which will server as building block for more complex PM implementation in the future. At the least will not leave clocks on unnecessarily when e.g. a user write mem to /sys/power/state. Signed-off-by: Felipe Balbi Tested-by: WingMan Kwok Acked-by: Santosh Shilimkar --- improve error path a little bit. drivers/usb/dwc3/dwc3-keystone.c | 94 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 91 insertions(+), 3 deletions(-) diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c index 1fad161..3b3761c 100644 --- a/drivers/usb/dwc3/dwc3-keystone.c +++ b/drivers/usb/dwc3/dwc3-keystone.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include @@ -118,13 +119,22 @@ static int kdwc3_probe(struct platform_device *pdev) kdwc->clk = devm_clk_get(kdwc->dev, "usb"); - error = clk_prepare_enable(kdwc->clk); + error = clk_prepare(kdwc->clk); if (error < 0) { dev_dbg(kdwc->dev, "unable to enable usb clock, err %d\n", error); return error; } + pm_runtime_enable(dev); + + error = pm_runtime_get_sync(dev); + if (error < 0) { + dev_dbg(dev, "unable to pm_runtime_get_sync(), err %d\n", + error); + goto err_irq; + } + irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(&pdev->dev, "missing irq\n"); @@ -151,8 +161,11 @@ static int kdwc3_probe(struct platform_device *pdev) err_core: kdwc3_disable_irqs(kdwc); + err_irq: - clk_disable_unprepare(kdwc->clk); + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + clk_unprepare(kdwc->clk); return error; } @@ -172,7 +185,9 @@ static int kdwc3_remove(struct platform_device *pdev) kdwc3_disable_irqs(kdwc); device_for_each_child(&pdev->dev, NULL, kdwc3_remove_core); - clk_disable_unprepare(kdwc->clk); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + clk_unprepare(kdwc->clk); platform_set_drvdata(pdev, NULL); return 0; @@ -184,6 +199,79 @@ static const struct of_device_id kdwc3_of_match[] = { }; MODULE_DEVICE_TABLE(of, kdwc3_of_match); +static int __kdwc3_suspend(struct dwc3_keystone *kdwc) +{ + clk_disable(kdwc->clk); + + return 0; +} + +static int __kdwc3_resume(struct dwc3_keystone *kdwc) +{ + return clk_enable(kdwc->clk); +} + +static int kdwc3_prepare(struct device *dev) +{ + struct dwc3_keystone *kdwc = dev_get_drvdata(dev); + + kdwc3_disable_irqs(kdwc); + + return 0; +} + +static void kdwc3_complete(struct device *dev) +{ + struct dwc3_keystone *kdwc = dev_get_drvdata(dev); + + kdwc3_enable_irqs(kdwc); +} + +static int kdwc3_suspend(struct device *dev) +{ + struct dwc3_keystone *kdwc = dev_get_drvdata(dev); + + return __kdwc3_suspend(kdwc); +} + +static int kdwc3_resume(struct device *dev) +{ + struct dwc3_keystone *kdwc = dev_get_drvdata(dev); + int ret; + + ret = __kdwc3_resume(kdwc); + if (ret) + return ret; + + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + return 0; +} + +static int kdwc3_runtime_suspend(struct device *dev) +{ + struct dwc3_keystone *kdwc = dev_get_drvdata(dev); + + return __kdwc3_suspend(kdwc); +} + +static int kdwc3_runtime_resume(struct device *dev) +{ + struct dwc3_keystone *kdwc = dev_get_drvdata(dev); + + return __kdwc3_resume(kdwc); +} + +static const struct dev_pm_ops kdwc3_dev_pm_ops = { + .prepare = kdwc3_prepare, + .complete = kdwc3_complete, + + SET_SYSTEM_SLEEP_PM_OPS(kdwc3_suspend, kdwc3_resume) + SET_RUNTIME_PM_OPS(kdwc3_runtime_suspend, kdwc3_runtime_resume, NULL) +}; + static struct platform_driver kdwc3_driver = { .probe = kdwc3_probe, .remove = kdwc3_remove,