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authorGrygorii Strashko <grygorii.strashko@ti.com>2018-05-31 00:25:21 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2018-05-31 02:42:12 +0300
commit22a844b853684a9f6088ede15114f8b286b49560 (patch)
treecc4ce911ace9d9c8758ed21d3371e71919acbc23 /drivers/input
parent46850420e5e2330781aae5ff30cf19392d49979e (diff)
downloadlinux-22a844b853684a9f6088ede15114f8b286b49560.tar.xz
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>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/ti_am335x_tsc.c3
1 files changed, 3 insertions, 0 deletions
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,