From: Grygorii Strashko Date: Wed, 30 May 2018 21:25:21 +0000 (-0700) Subject: Input: ti_am335x_tsc - prevent system suspend when TSC is in use X-Git-Tag: android-x86-8.1-r1~82^2~28^2~2 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=22a844b853684a9f6088ede15114f8b286b49560;p=android-x86%2Fkernel.git Input: ti_am335x_tsc - prevent system suspend when TSC is in use 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 Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c index a8c828de723c..b86c1e5fbc11 100644 --- a/drivers/input/touchscreen/ti_am335x_tsc.c +++ b/drivers/input/touchscreen/ti_am335x_tsc.c @@ -276,6 +276,7 @@ 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) { @@ -285,6 +286,7 @@ 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; } @@ -517,6 +519,7 @@ 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,