From patchwork Fri Jan 16 19:41:14 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sylvain Rochet X-Patchwork-Id: 5650211 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 89AA99F2ED for ; Fri, 16 Jan 2015 19:44:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B292E202E9 for ; Fri, 16 Jan 2015 19:44:13 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6E0D3202A1 for ; Fri, 16 Jan 2015 19:44:12 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YCCmJ-0005Qt-H4; Fri, 16 Jan 2015 19:41:55 +0000 Received: from mx-guillaumet.finsecur.com ([91.217.234.131] helo=guillaumet.finsecur.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YCCmG-0005NI-JA for linux-arm-kernel@lists.infradead.org; Fri, 16 Jan 2015 19:41:53 +0000 Received: from [172.16.8.13] (helo=spice.lan) by guillaumet.finsecur.com with esmtps (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1YCClo-00073g-8L; Fri, 16 Jan 2015 20:41:24 +0100 Received: from gradator by spice.lan with local (Exim 4.84) (envelope-from ) id 1YCClo-0008I0-1A; Fri, 16 Jan 2015 20:41:24 +0100 From: Sylvain Rochet To: nicolas.ferre@atmel.com, alexandre.belloni@free-electrons.com, boris.brezillon@free-electrons.com, plagnioj@jcrosoft.com, voice.shen@atmel.com, linux-arm-kernel@lists.infradead.org Date: Fri, 16 Jan 2015 20:41:14 +0100 Message-Id: <1421437274-31615-1-git-send-email-sylvain.rochet@finsecur.com> X-Mailer: git-send-email 2.1.4 X-SA-Exim-Connect-IP: 172.16.8.13 X-SA-Exim-Mail-From: sylvain.rochet@finsecur.com X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Subject: [PATCH] USB: host: ehci_atmel: Add suspend/resume support X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on guillaumet.finsecur.com) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150116_114152_821773_879CB771 X-CRM114-Status: GOOD ( 11.09 ) X-Spam-Score: -0.0 (/) Cc: Sylvain Rochet X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 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 This patch add suspend/resume support for Atmel EHCI, mostly about disabling and unpreparing clocks so USB PLL is stopped before entering sleep state. Signed-off-by: Sylvain Rochet Acked-by: Alexandre Belloni --- drivers/usb/host/ehci-atmel.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c index 56a8850..790de92 100644 --- a/drivers/usb/host/ehci-atmel.c +++ b/drivers/usb/host/ehci-atmel.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -174,6 +175,36 @@ static int ehci_atmel_drv_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int ehci_atmel_drv_suspend(struct platform_device *pdev, pm_message_t mesg) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + int ret; + + ret = ehci_suspend(hcd, false); + if (ret) + return ret; + + if (at91_suspend_entering_slow_clock()) + atmel_stop_clock(); + + return 0; +} + +static int ehci_atmel_drv_resume(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + + if (!clocked) + atmel_start_clock(); + + return ehci_resume(hcd, false); +} +#else +#define ehci_atmel_drv_suspend NULL +#define ehci_atmel_drv_resume NULL +#endif + #ifdef CONFIG_OF static const struct of_device_id atmel_ehci_dt_ids[] = { { .compatible = "atmel,at91sam9g45-ehci" }, @@ -187,6 +218,8 @@ static struct platform_driver ehci_atmel_driver = { .probe = ehci_atmel_drv_probe, .remove = ehci_atmel_drv_remove, .shutdown = usb_hcd_platform_shutdown, + .suspend = ehci_atmel_drv_suspend, + .resume = ehci_atmel_drv_resume, .driver = { .name = "atmel-ehci", .of_match_table = of_match_ptr(atmel_ehci_dt_ids),