From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753834AbcEPLfG (ORCPT ); Mon, 16 May 2016 07:35:06 -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 S1752802AbcEPLfE (ORCPT ); Mon, 16 May 2016 07:35:04 -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 3/3] Input: ti_am335x_tsc - Ack pending IRQs at probe and before suspend Date: Mon, 16 May 2016 16:56:24 +0530 Message-ID: <1463397984-15766-4-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 It is seen that just enabling the TSC module triggers a HW_PEN IRQ without any interaction with touchscreen by user. This results in first suspend/resume sequence to fail as system immediately wakes up from suspend as soon as HW_PEN IRQ is enabled in suspend handler. due to the pending IRQ. Therefore clear all IRQs at probe and also in suspend callback for sanity. Signed-off-by: Grygorii Strashko Signed-off-by: Vignesh R --- drivers/input/touchscreen/ti_am335x_tsc.c | 2 ++ include/linux/mfd/ti_am335x_tscadc.h | 1 + 2 files changed, 3 insertions(+) diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c index 4683ed18b9f8..d2c55b5730e6 100644 --- a/drivers/input/touchscreen/ti_am335x_tsc.c +++ b/drivers/input/touchscreen/ti_am335x_tsc.c @@ -441,6 +441,7 @@ static int titsc_probe(struct platform_device *pdev) dev_err(&pdev->dev, "irq wake enable failed.\n"); } + titsc_writel(ts_dev, REG_IRQSTATUS, IRQENB_MASK); titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO0THRES); titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_EOS); err = titsc_config_wires(ts_dev); @@ -506,6 +507,7 @@ static int __maybe_unused titsc_suspend(struct device *dev) tscadc_dev = ti_tscadc_dev_get(to_platform_device(dev)); if (device_may_wakeup(tscadc_dev->dev)) { + titsc_writel(ts_dev, REG_IRQSTATUS, IRQENB_MASK); idle = titsc_readl(ts_dev, REG_IRQENABLE); titsc_writel(ts_dev, REG_IRQENABLE, (idle | IRQENB_HW_PEN)); diff --git a/include/linux/mfd/ti_am335x_tscadc.h b/include/linux/mfd/ti_am335x_tscadc.h index 1fd50dcfe47c..a7ca0f908ba8 100644 --- a/include/linux/mfd/ti_am335x_tscadc.h +++ b/include/linux/mfd/ti_am335x_tscadc.h @@ -60,6 +60,7 @@ #define IRQENB_FIFO1OVRRUN BIT(6) #define IRQENB_FIFO1UNDRFLW BIT(7) #define IRQENB_PENUP BIT(9) +#define IRQENB_MASK (0x7FF) /* Step Configuration */ #define STEPCONFIG_MODE_MASK (3 << 0) -- 2.8.2