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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 <grygorii.strashko@ti.com> Signed-off-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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1 changed files with 3 additions and 0 deletions
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@ -276,6 +276,7 @@ static irqreturn_t titsc_irq(int irq, void *dev)
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if (status & IRQENB_HW_PEN) {
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ts_dev->pen_down = true;
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irqclr |= IRQENB_HW_PEN;
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pm_stay_awake(ts_dev->mfd_tscadc->dev);
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}
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if (status & IRQENB_PENUP) {
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@ -285,6 +286,7 @@ static irqreturn_t titsc_irq(int irq, void *dev)
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input_report_key(input_dev, BTN_TOUCH, 0);
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input_report_abs(input_dev, ABS_PRESSURE, 0);
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input_sync(input_dev);
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pm_relax(ts_dev->mfd_tscadc->dev);
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} else {
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ts_dev->pen_down = true;
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}
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@ -517,6 +519,7 @@ static int __maybe_unused titsc_resume(struct device *dev)
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titsc_writel(ts_dev, REG_IRQWAKEUP,
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0x00);
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titsc_writel(ts_dev, REG_IRQCLR, IRQENB_HW_PEN);
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pm_relax(ts_dev->mfd_tscadc->dev);
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}
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titsc_step_config(ts_dev);
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titsc_writel(ts_dev, REG_FIFO0THR,
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