From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753950AbcEPLfv (ORCPT ); Mon, 16 May 2016 07:35:51 -0400 Received: from bear.ext.ti.com ([198.47.19.11]:44272 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753400AbcEPLfD (ORCPT ); Mon, 16 May 2016 07:35:03 -0400 X-Greylist: delayed 496 seconds by postgrey-1.27 at vger.kernel.org; Mon, 16 May 2016 07:35:02 EDT From: Vignesh R To: Dmitry Torokhov , Lee Jones CC: Vignesh R , Grygorii Strashko , Dave Gerlach , , Subject: [PATCH 2/3] Input: ti_am335x_tsc - Prevent system suspend when TSC is in use Date: Mon, 16 May 2016 16:56:23 +0530 Message-ID: <1463397984-15766-3-git-send-email-vigneshr@ti.com> X-Mailer: git-send-email 2.8.2 In-Reply-To: <1463397984-15766-1-git-send-email-vigneshr@ti.com> References: <1463397984-15766-1-git-send-email-vigneshr@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Grygorii Strashko Prevent system suspend while user has finger on touch screen, because TSC is wakeup source and suspending device while in use will result in failure to disable the module. This patch uses pm_stay_awake() and pm_relax() APIs to prevent and resume system suspend as required. Signed-off-by: Grygorii Strashko Signed-off-by: Vignesh R --- drivers/input/touchscreen/ti_am335x_tsc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c index f9fefbe337b9..4683ed18b9f8 100644 --- a/drivers/input/touchscreen/ti_am335x_tsc.c +++ b/drivers/input/touchscreen/ti_am335x_tsc.c @@ -275,6 +275,7 @@ static irqreturn_t titsc_irq(int irq, void *dev) if (status & IRQENB_HW_PEN) { ts_dev->pen_down = true; irqclr |= IRQENB_HW_PEN; + pm_stay_awake(ts_dev->mfd_tscadc->dev); } if (status & IRQENB_PENUP) { @@ -284,6 +285,7 @@ static irqreturn_t titsc_irq(int irq, void *dev) input_report_key(input_dev, BTN_TOUCH, 0); input_report_abs(input_dev, ABS_PRESSURE, 0); input_sync(input_dev); + pm_relax(ts_dev->mfd_tscadc->dev); } else { ts_dev->pen_down = true; } @@ -522,6 +524,7 @@ static int __maybe_unused titsc_resume(struct device *dev) titsc_writel(ts_dev, REG_IRQWAKEUP, 0x00); titsc_writel(ts_dev, REG_IRQCLR, IRQENB_HW_PEN); + pm_relax(ts_dev->mfd_tscadc->dev); } titsc_step_config(ts_dev); titsc_writel(ts_dev, REG_FIFO0THR, -- 2.8.2