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| author | Felix Fietkau <nbd@openwrt.org> | 2013-06-29 19:01:49 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2013-06-29 19:01:49 +0000 |
| commit | 0f6e9c9fcc18fee284f3e4a1201c5a257d83b1b1 (patch) | |
| tree | 55d8fae86c6ab91bb73cdedd7b58e8dcb996f3cf /package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c | |
| parent | 124ef95f5f3850a6f9bfe7dfdc48f082f996fa1b (diff) | |
| download | mtk-20170518-0f6e9c9fcc18fee284f3e4a1201c5a257d83b1b1.zip mtk-20170518-0f6e9c9fcc18fee284f3e4a1201c5a257d83b1b1.tar.gz mtk-20170518-0f6e9c9fcc18fee284f3e4a1201c5a257d83b1b1.tar.bz2 | |
gpio-button-hotplug: improve gpio button debouncing, verify state changes over multiple polls. fixes spurious failsafe triggers (#13784)
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 37090
Diffstat (limited to 'package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c')
| -rw-r--r-- | package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c b/package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c index 9d91b57..412c045 100644 --- a/package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c +++ b/package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c @@ -274,10 +274,16 @@ static void gpio_keys_polled_check_state(struct gpio_keys_button *button, if (state != bdata->last_state) { unsigned int type = button->type ?: EV_KEY; + if (bdata->count < bdata->threshold) { + bdata->count++; + return; + } + button_hotplug_event(bdata, type, button->code, state); - bdata->count = 0; bdata->last_state = state; } + + bdata->count = 0; } static void gpio_keys_polled_queue_work(struct gpio_keys_polled_dev *bdev) @@ -299,11 +305,7 @@ static void gpio_keys_polled_poll(struct work_struct *work) for (i = 0; i < bdev->pdata->nbuttons; i++) { struct gpio_keys_button_data *bdata = &bdev->data[i]; - - if (bdata->count < bdata->threshold) - bdata->count++; - else - gpio_keys_polled_check_state(&pdata->buttons[i], bdata); + gpio_keys_polled_check_state(&pdata->buttons[i], bdata); } gpio_keys_polled_queue_work(bdev); } |