From patchwork Thu Apr 14 15:48:29 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Wahren X-Patchwork-Id: 8839191 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id C0297C0553 for ; Thu, 14 Apr 2016 15:52:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EB912202EB for ; Thu, 14 Apr 2016 15:52:31 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1199D20270 for ; Thu, 14 Apr 2016 15:52:31 +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 1aqjXt-0003Hi-CB; Thu, 14 Apr 2016 15:51:05 +0000 Received: from mout.kundenserver.de ([217.72.192.74]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aqjWT-0000dM-L8 for linux-arm-kernel@lists.infradead.org; Thu, 14 Apr 2016 15:49:39 +0000 Received: from localhost.localdomain ([95.91.39.67]) by mrelayeu.kundenserver.de (mreue101) with ESMTPSA (Nemesis) id 0LfikE-1baBD33qna-00pKZW; Thu, 14 Apr 2016 17:48:48 +0200 From: Stefan Wahren To: Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Marek Vasut Subject: [PATCH RFT 5/5] iio: mxs-lradc: implement suspend/resume support Date: Thu, 14 Apr 2016 15:48:29 +0000 Message-Id: <1460648909-2657-6-git-send-email-stefan.wahren@i2se.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1460648909-2657-1-git-send-email-stefan.wahren@i2se.com> References: <1460648909-2657-1-git-send-email-stefan.wahren@i2se.com> X-Provags-ID: V03:K0:7o/tUvLHZYxmzZlcdrBn8LTF+Yjz+av5S6EfeGExvDOaVWh4H+L TfRxSPpYsofT6fG90BROKYYKdOGy9dmwK9vrKpbdIOWz3CsYA27UN5Y9fn//TUhMdCRY/ud QufRHipCDwZIeimOEeToVt10yGcJFPpxrv7u6ZdEOyCGhywcI+Kg9PzryhaBy7EZ9DuDsou UnFKWT4C53pwIE0Ay6b2g== X-UI-Out-Filterresults: notjunk:1; V01:K0:Wu94XWwlxMI=:fFgOJYvtuDLasGOV2E770M nXtX0P0WK1ImAIOPEvWM5VoXIebxhhzIZiLQzKpZRAbIOSmQmp/1rARi7FF/0VoqEMQDui2DZ GHHCMR/yEbWu5NFJy9DEzUNTagg6xKYYqObS2WsJ/2mzk4KlBqTb2bXQ2jhNyorr6YDVWsa3r abkwhPhu1QlBXlVAq1BaVScUheEaV4kdqCgNU/BTA4d/ewnU6HWsEIGWvGdeUZOkXgvWch+Jz +RzVgZVcGrJXwqIPASQxINkc725oQXIhPItbhrsLKt9OYFL8ZzM/f7XXaDjO+KxTqUdpCFOGt YuCO3vHFcQAK+WqdJXpnxuo1lQy36MjD2nHd/gHI2+pFmtKKLi+sPsVcWowKXKNct7DQENdAi G1HvkPFyZbP9czEzcGX8HEEQB3YmAUWD/mCAR7yPcg54KTVYeOsJqvVO9toIl7QYm/60rFFpu /8ChE4/BofbXg2pRkslJaWuB0fLlwpMTJqAMU4DDWAjvEb1f6Ia+aOQqKRG++BvFmhwdFpOHN 9TZtpTeezY6DNGepLJXS7BbcEQbWnO8O6fPI/yIohYcHLFm+UzSzuXgiPesqsOEMRvPYFycHU Rj0iQejzweZ5egyGaSmfnXlMgdP6tbrH/K/v0G7Kyl6MnIB7DgXEnY6RUL0Y32uC3LjtMqX84 EoNKVwh4C2ZLrRjqasgohw874MlAp3oOLMrSiZOLGpafw20YMKyAyKnAHCK+tByJ21FE= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160414_084938_273704_A099FC1D X-CRM114-Status: GOOD ( 12.49 ) X-Spam-Score: -2.6 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stefan Wahren , Ksenija Stanojevic , linux-iio@vger.kernel.org, Alexandre Belloni , Fabio Estevam , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 This patch implements suspend/resume support for mxs-lradc. It's possible to use the touchscreen as wakeup source. Signed-off-by: Stefan Wahren --- drivers/iio/adc/mxs-lradc.c | 61 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/drivers/iio/adc/mxs-lradc.c b/drivers/iio/adc/mxs-lradc.c index 97c993f..64704c9 100644 --- a/drivers/iio/adc/mxs-lradc.c +++ b/drivers/iio/adc/mxs-lradc.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -1745,10 +1746,70 @@ static int mxs_lradc_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused mxs_lradc_suspend(struct device *dev) +{ + struct iio_dev *iio = dev_get_drvdata(dev); + struct mxs_lradc *lradc = iio_priv(iio); + struct input_dev *input = lradc->ts_input; + int ret = 0; + + if (input) { + mutex_lock(&input->mutex); + + /* Enable touchscreen wakeup irq */ + if (input->users && device_may_wakeup(dev)) + ret = enable_irq_wake(lradc->irq[0]); + else + mxs_lradc_disable_ts(lradc); + + mutex_unlock(&input->mutex); + } + + if (ret) + return ret; + + mxs_lradc_hw_stop(lradc); + + clk_disable_unprepare(lradc->clk); + + return ret; +} + +static int __maybe_unused mxs_lradc_resume(struct device *dev) +{ + struct iio_dev *iio = dev_get_drvdata(dev); + struct mxs_lradc *lradc = iio_priv(iio); + struct input_dev *input = lradc->ts_input; + int ret; + + ret = clk_prepare_enable(lradc->clk); + if (ret) + return ret; + + mxs_lradc_hw_init(lradc); + + if (input) { + mutex_lock(&input->mutex); + + /* Disable touchscreen wakeup irq */ + if (input->users && device_may_wakeup(dev)) + ret = disable_irq_wake(lradc->irq[0]); + else + mxs_lradc_enable_touch_detection(lradc); + + mutex_unlock(&input->mutex); + } + + return ret; +} + +static SIMPLE_DEV_PM_OPS(mxs_lradc_pm_ops, mxs_lradc_suspend, mxs_lradc_resume); + static struct platform_driver mxs_lradc_driver = { .driver = { .name = DRIVER_NAME, .of_match_table = mxs_lradc_dt_ids, + .pm = &mxs_lradc_pm_ops, }, .probe = mxs_lradc_probe, .remove = mxs_lradc_remove,