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Input: ti_am335x_tsc - prevent system suspend when TSC is in use

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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 <[email protected]>
Signed-off-by: Vignesh R <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
This commit is contained in:
Grygorii Strashko 2018-05-30 14:25:21 -07:00 • committed by Dmitry Torokhov
commit 22a844b853
1 changed files with 3 additions and 0 deletions
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3
drivers/input/touchscreen/ti_am335x_tsc.c
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@ -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,