From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751196AbeDNJvZ (ORCPT ); Sat, 14 Apr 2018 05:51:25 -0400 Received: from lelnx194.ext.ti.com ([198.47.27.80]:15211 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751073AbeDNJvT (ORCPT ); Sat, 14 Apr 2018 05:51:19 -0400 From: Vignesh R To: Dmitry Torokhov CC: Vignesh R , Grygorii Strashko , , , , Tony Lindgren Subject: [PATCH v2 3/3] Input: ti_am335x_tsc - Prevent system suspend when TSC is in use Date: Sat, 14 Apr 2018 15:21:53 +0530 Message-ID: <20180414095153.32060-4-vigneshr@ti.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180414095153.32060-1-vigneshr@ti.com> References: <20180414095153.32060-1-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 --- v2: No changes. 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 dcd9db768169..43b22e071842 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; } @@ -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