More build fixes
This commit is contained in:
Hans de Goede
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From 25bb14c1e78e641049fd1ee0c404a9ccd2755e44 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Sat, 22 Jul 2017 13:00:05 +0200
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Subject: [PATCH 1/2] Input: gpio_keys - Allow suppression of input events for
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wakeup button presses
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In some cases it is undesirable for a wakeup button to send input events
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to userspace if pressed to wakeup the system (if pressed during suspend).
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A typical example of this is the power-button on laptops / tablets,
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sending a KEY_POWER event to userspace when woken up with the power-button
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will cause userspace to immediately suspend the system again which is
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undesirable.
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For power-buttons attached to a PMIC, or handled by e.g. ACPI, not sending
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an input event in this case is take care of by the PMIC / ACPI hardware /
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code. But in the case of a GPIO button we need to explicitly suppress the
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sending of the input event.
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This commit adds support for this by adding a no_wakeup_events bool to
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struct gpio_keys_button, which platform code can set to suppress the
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input events for presses of wakeup keys during suspend.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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Changes in v2:
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-This is a rewrite if my "Input: gpio_keys - Do not report wake button
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presses as evdev events" patch.
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-Instead of unconditionally ignoring presses of all wake-up buttons during
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suspend, this rewrite makes this configurable per button
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-This version uses a timer to delay clearing the suspended flag for software
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debouncing, rather then jiffy compare magic
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---
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drivers/input/keyboard/gpio_keys.c | 33 +++++++++++++++++++++++++++++++--
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include/linux/gpio_keys.h | 3 +++
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2 files changed, 34 insertions(+), 2 deletions(-)
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diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
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index a047b9af8369..fa3a58620407 100644
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--- a/drivers/input/keyboard/gpio_keys.c
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+++ b/drivers/input/keyboard/gpio_keys.c
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@@ -38,6 +38,7 @@ struct gpio_button_data {
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unsigned short *code;
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+ struct timer_list unsuspend_timer;
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struct timer_list release_timer;
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unsigned int release_delay; /* in msecs, for IRQ-only buttons */
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@@ -371,6 +372,9 @@ static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
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return;
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}
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+ if (state && bdata->button->no_wakeup_events && bdata->suspended)
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+ return;
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+
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if (type == EV_ABS) {
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if (state)
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input_event(input, type, button->code, button->value);
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@@ -400,6 +404,9 @@ static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
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if (bdata->button->wakeup) {
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const struct gpio_keys_button *button = bdata->button;
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+ if (bdata->button->no_wakeup_events && bdata->suspended)
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+ return IRQ_HANDLED;
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+
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pm_stay_awake(bdata->input->dev.parent);
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if (bdata->suspended &&
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(button->type == 0 || button->type == EV_KEY)) {
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@@ -445,9 +452,13 @@ static irqreturn_t gpio_keys_irq_isr(int irq, void *dev_id)
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spin_lock_irqsave(&bdata->lock, flags);
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if (!bdata->key_pressed) {
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- if (bdata->button->wakeup)
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+ if (bdata->button->wakeup) {
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pm_wakeup_event(bdata->input->dev.parent, 0);
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+ if (bdata->button->no_wakeup_events && bdata->suspended)
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+ goto out;
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+ }
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+
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input_event(input, EV_KEY, *bdata->code, 1);
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input_sync(input);
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@@ -468,6 +479,13 @@ static irqreturn_t gpio_keys_irq_isr(int irq, void *dev_id)
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return IRQ_HANDLED;
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}
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+static void gpio_keys_unsuspend_timer(unsigned long _data)
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+{
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+ struct gpio_button_data *bdata = (struct gpio_button_data *)_data;
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+
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+ bdata->suspended = false;
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+}
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+
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static void gpio_keys_quiesce_key(void *data)
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{
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struct gpio_button_data *bdata = data;
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@@ -476,6 +494,8 @@ static void gpio_keys_quiesce_key(void *data)
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cancel_delayed_work_sync(&bdata->work);
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else
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del_timer_sync(&bdata->release_timer);
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+
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+ del_timer_sync(&bdata->unsuspend_timer);
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}
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static int gpio_keys_setup_key(struct platform_device *pdev,
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@@ -496,6 +516,8 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
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bdata->input = input;
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bdata->button = button;
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spin_lock_init(&bdata->lock);
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+ setup_timer(&bdata->unsuspend_timer, gpio_keys_unsuspend_timer,
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+ (unsigned long)bdata);
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if (child) {
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bdata->gpiod = devm_fwnode_get_gpiod_from_child(dev, NULL,
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@@ -868,6 +890,7 @@ static int __maybe_unused gpio_keys_suspend(struct device *dev)
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struct gpio_button_data *bdata = &ddata->data[i];
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if (bdata->button->wakeup)
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enable_irq_wake(bdata->irq);
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+ del_timer_sync(&bdata->unsuspend_timer);
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bdata->suspended = true;
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}
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} else {
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@@ -892,7 +915,13 @@ static int __maybe_unused gpio_keys_resume(struct device *dev)
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struct gpio_button_data *bdata = &ddata->data[i];
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if (bdata->button->wakeup)
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disable_irq_wake(bdata->irq);
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- bdata->suspended = false;
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+ if (bdata->button->no_wakeup_events) {
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+ mod_timer(&bdata->unsuspend_timer, jiffies +
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+ msecs_to_jiffies(
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+ bdata->software_debounce));
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+ } else {
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+ bdata->suspended = false;
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+ }
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}
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} else {
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mutex_lock(&input->mutex);
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diff --git a/include/linux/gpio_keys.h b/include/linux/gpio_keys.h
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index 0b71024c082c..d8a85e52b6bb 100644
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--- a/include/linux/gpio_keys.h
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+++ b/include/linux/gpio_keys.h
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@@ -15,6 +15,8 @@ struct device;
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* @debounce_interval: debounce ticks interval in msecs
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* @can_disable: %true indicates that userspace is allowed to
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* disable button via sysfs
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+ * @no_wakeup_events: For wake-up source buttons only, if %true then no input
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+ * events will be generated if pressed while suspended
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* @value: axis value for %EV_ABS
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* @irq: Irq number in case of interrupt keys
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*/
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@@ -27,6 +29,7 @@ struct gpio_keys_button {
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int wakeup;
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int debounce_interval;
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bool can_disable;
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+ bool no_wakeup_events;
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int value;
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unsigned int irq;
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};
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--
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2.13.4
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@ -1,62 +0,0 @@
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From d561f0543506bc12e7b3355efddb0bfd7ca83c74 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Sat, 22 Jul 2017 13:17:36 +0200
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Subject: [PATCH 2/2] Input: soc_button_array - Suppress power button presses
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during suspend
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If the power-button is pressed to wakeup the laptop/tablet from suspend
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and we report a KEY_POWER event to userspace when woken up this will cause
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userspace to immediately suspend the system again which is undesirable.
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This commit sets the new no_wakeup_events flag in the gpio_keys_button
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struct for the power-button suppressing the undesirable KEY_POWER input
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events on wake-up.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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Changes in v2:
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-New patch in v2 of this patch-set
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---
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drivers/input/misc/soc_button_array.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/drivers/input/misc/soc_button_array.c b/drivers/input/misc/soc_button_array.c
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index f600f3a7a3c6..27b99831cb97 100644
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--- a/drivers/input/misc/soc_button_array.c
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+++ b/drivers/input/misc/soc_button_array.c
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@@ -27,6 +27,7 @@ struct soc_button_info {
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unsigned int event_code;
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bool autorepeat;
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bool wakeup;
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+ bool no_wakeup_events;
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};
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/*
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@@ -100,6 +101,7 @@ soc_button_device_create(struct platform_device *pdev,
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gpio_keys[n_buttons].active_low = 1;
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gpio_keys[n_buttons].desc = info->name;
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gpio_keys[n_buttons].wakeup = info->wakeup;
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+ gpio_keys[n_buttons].no_wakeup_events = info->no_wakeup_events;
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/* These devices often use cheap buttons, use 50 ms debounce */
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gpio_keys[n_buttons].debounce_interval = 50;
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n_buttons++;
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@@ -185,6 +187,7 @@ static int soc_button_parse_btn_desc(struct device *dev,
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info->name = "power";
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info->event_code = KEY_POWER;
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info->wakeup = true;
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+ info->no_wakeup_events = true;
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} else if (upage == 0x07 && usage == 0xe3) {
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info->name = "home";
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info->event_code = KEY_LEFTMETA;
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@@ -369,7 +372,7 @@ static int soc_button_probe(struct platform_device *pdev)
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* Platforms"
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*/
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static struct soc_button_info soc_button_PNP0C40[] = {
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- { "power", 0, EV_KEY, KEY_POWER, false, true },
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+ { "power", 0, EV_KEY, KEY_POWER, false, true, true },
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{ "home", 1, EV_KEY, KEY_LEFTMETA, false, true },
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{ "volume_up", 2, EV_KEY, KEY_VOLUMEUP, true, false },
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{ "volume_down", 3, EV_KEY, KEY_VOLUMEDOWN, true, false },
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--
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2.13.4
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@ -615,9 +615,6 @@ Patch332: arm64-socionext-96b-enablement.patch
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# 600 - Patches for improved Bay and Cherry Trail device support
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# Below patches are submitted upstream, awaiting review / merging
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# This one needs to be rebased
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# Patch601: 0001-Input-gpio_keys-Allow-suppression-of-input-events-fo.patch
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Patch602: 0002-Input-soc_button_array-Suppress-power-button-presses.patch
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Patch610: 0010-Input-silead-Add-support-for-capactive-home-button-f.patch
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# rhbz 1476467
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