From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756187AbeDXG1T (ORCPT ); Tue, 24 Apr 2018 02:27:19 -0400 Received: from lelnx193.ext.ti.com ([198.47.27.77]:59514 "EHLO lelnx193.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756056AbeDXG1O (ORCPT ); Tue, 24 Apr 2018 02:27:14 -0400 From: Vignesh R To: Dmitry Torokhov CC: Vignesh R , Grygorii Strashko , , , , Tony Lindgren Subject: [PATCH v3 3/3] Input: ti_am335x_tsc - Prevent system suspend when TSC is in use Date: Tue, 24 Apr 2018 11:57:41 +0530 Message-ID: <20180424062741.7891-4-vigneshr@ti.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180424062741.7891-1-vigneshr@ti.com> References: <20180424062741.7891-1-vigneshr@ti.com> MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 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 --- v3: No change 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 a548b0dbe320..ae6fc9099636 100644 --- a/drivers/input/touchscreen/ti_am335x_tsc.c +++ b/drivers/input/touchscreen/ti_am335x_tsc.c @@ -277,6 +277,7 @@ 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) { @@ -286,6 +287,7 @@ 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; } @@ -524,6 +526,7 @@ 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, -- 2.17.0