diff options
| author |   Tony Lindgren <tony@atomide.com> | 2023-11-29 13:06:15 +0200 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-11-30 12:06:55 -0800 |
| commit | 3717194f249227a3dfd8433bd9374cc7e0cf823d (patch) | |
| tree | 08aa6898e873b2cd33a1ecaf1e09e3807951b0f3 /include/linux/gpio_keys.h | |
| parent | dt-bindings: input: gpio-keys: Allow optional dedicated wakeirq (diff) | |
| download | wireguard-linux-3717194f249227a3dfd8433bd9374cc7e0cf823d.tar.xz wireguard-linux-3717194f249227a3dfd8433bd9374cc7e0cf823d.zip | |
Input: gpio-keys - add system suspend support for dedicated wakeirqs
Some SoCs have a separate dedicated wake-up interrupt controller that can
be used to wake up the system from deeper idle states. We already support
configuring a separate interrupt for a gpio-keys button to be used with a
gpio line. However, we are lacking support system suspend for cases where
a separate interrupt needs to be used in deeper sleep modes.
Because of it's nature, gpio-keys does not know about the runtime PM state
of the button gpios, and may have several gpio buttons configured for each
gpio-keys device instance. Implementing runtime PM support for gpio-keys
does not help, and we cannot use drivers/base/power/wakeirq.c support. We
need to implement custom wakeirq support for gpio-keys.
For handling a dedicated wakeirq for system suspend, we enable and disable
it with gpio_keys_enable_wakeup() and gpio_keys_disable_wakeup() that we
already use based on device_may_wakeup().
Some systems may have a dedicated wakeirq that can also be used as the
main interrupt, this is already working for gpio-keys. Let's add some
wakeirq related comments while at it as the usage with a gpio line and
separate interrupt line may not be obvious.
Tested-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20231129110618.27551-2-tony@atomide.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'include/linux/gpio_keys.h')
| -rw-r--r-- | include/linux/gpio_keys.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/gpio_keys.h b/include/linux/gpio_keys.h index 3f84aeb81e48..80fa930b04c6 100644 --- a/include/linux/gpio_keys.h +++ b/include/linux/gpio_keys.h @@ -21,6 +21,7 @@ struct device; * disable button via sysfs * @value: axis value for %EV_ABS * @irq: Irq number in case of interrupt keys + * @wakeirq: Optional dedicated wake-up interrupt */ struct gpio_keys_button { unsigned int code; @@ -34,6 +35,7 @@ struct gpio_keys_button { bool can_disable; int value; unsigned int irq; + unsigned int wakeirq; }; /** |