From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Wahren Subject: [PATCH RFT V2 3/3] iio: mxs-lradc: implement suspend/resume support Date: Thu, 21 Apr 2016 20:11:18 +0000 Message-ID: <1461269478-449-4-git-send-email-stefan.wahren@i2se.com> References: <1461269478-449-1-git-send-email-stefan.wahren@i2se.com> Return-path: Received: from mout.kundenserver.de ([217.72.192.75]:52198 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751742AbcDUUMX (ORCPT ); Thu, 21 Apr 2016 16:12:23 -0400 In-Reply-To: <1461269478-449-1-git-send-email-stefan.wahren@i2se.com> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Jonathan Cameron , Dmitry Torokhov , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Marek Vasut Cc: Fabio Estevam , Juergen Borleis , linux-iio@vger.kernel.org, linux-input@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Stefan Wahren 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 cfc558f..6bd387f 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, -- 1.7.9.5 From mboxrd@z Thu Jan 1 00:00:00 1970 From: stefan.wahren@i2se.com (Stefan Wahren) Date: Thu, 21 Apr 2016 20:11:18 +0000 Subject: [PATCH RFT V2 3/3] iio: mxs-lradc: implement suspend/resume support In-Reply-To: <1461269478-449-1-git-send-email-stefan.wahren@i2se.com> References: <1461269478-449-1-git-send-email-stefan.wahren@i2se.com> Message-ID: <1461269478-449-4-git-send-email-stefan.wahren@i2se.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 cfc558f..6bd387f 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, -- 1.7.9.5