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authorJoseph Lo <josephl@nvidia.com>2017-07-02 13:38:31 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2017-07-09 14:43:27 -0700
commit0f107573da417c7f5c6d3a0160ebacc3adb019c4 (patch)
tree1ac0904f13444da56c46d2b91df77bbbe183b81d /drivers/input/keyboard
parent49aac8204da5f344f52ed9b3eb8736ca7a60c4a8 (diff)
downloadlinux-0f107573da417c7f5c6d3a0160ebacc3adb019c4.tar.bz2
Input: gpio_keys - handle the missing key press event in resume phase
The GPIO key press event might be missed in the resume phase, if the key had been released before the system had been resumed to the stage that it could capture the press event. So we simulate the wakeup key press event in case the key had been released by the time we got interrupt handler to run. Signed-off-by: Joseph Lo <josephl@nvidia.com> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/keyboard')
-rw-r--r--drivers/input/keyboard/gpio_keys.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index da3d362f21b1..a047b9af8369 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -48,6 +48,7 @@ struct gpio_button_data {
spinlock_t lock;
bool disabled;
bool key_pressed;
+ bool suspended;
};
struct gpio_keys_drvdata {
@@ -396,8 +397,20 @@ static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
BUG_ON(irq != bdata->irq);
- if (bdata->button->wakeup)
+ if (bdata->button->wakeup) {
+ const struct gpio_keys_button *button = bdata->button;
+
pm_stay_awake(bdata->input->dev.parent);
+ if (bdata->suspended &&
+ (button->type == 0 || button->type == EV_KEY)) {
+ /*
+ * Simulate wakeup key press in case the key has
+ * already released by the time we got interrupt
+ * handler to run.
+ */
+ input_report_key(bdata->input, button->code, 1);
+ }
+ }
mod_delayed_work(system_wq,
&bdata->work,
@@ -855,6 +868,7 @@ static int __maybe_unused gpio_keys_suspend(struct device *dev)
struct gpio_button_data *bdata = &ddata->data[i];
if (bdata->button->wakeup)
enable_irq_wake(bdata->irq);
+ bdata->suspended = true;
}
} else {
mutex_lock(&input->mutex);
@@ -878,6 +892,7 @@ static int __maybe_unused gpio_keys_resume(struct device *dev)
struct gpio_button_data *bdata = &ddata->data[i];
if (bdata->button->wakeup)
disable_irq_wake(bdata->irq);
+ bdata->suspended = false;
}
} else {
mutex_lock(&input->mutex);