serial: mctrl_gpio: add a new API to enable / disable wake_irq

Add a new API to enable / disable wake_irq in order to enable gpio irqs as
wakeup irqs for the uart port.

Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20220203171644.12231-2-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c
index c41d8911ce9578088fd58f42d023ee61129dec58..1663b3afc3a0629e621a54b138e3c77a9df612d5 100644 (file)
--- a/drivers/tty/serial/serial_mctrl_gpio.c
+++ b/drivers/tty/serial/serial_mctrl_gpio.c
@@ -299,4 +299,42 @@ void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios)
 }
 EXPORT_SYMBOL_GPL(mctrl_gpio_disable_ms);
 
+void mctrl_gpio_enable_irq_wake(struct mctrl_gpios *gpios)
+{
+       enum mctrl_gpio_idx i;
+
+       if (!gpios)
+               return;
+
+       if (!gpios->mctrl_on)
+               return;
+
+       for (i = 0; i < UART_GPIO_MAX; ++i) {
+               if (!gpios->irq[i])
+                       continue;
+
+               enable_irq_wake(gpios->irq[i]);
+       }
+}
+EXPORT_SYMBOL_GPL(mctrl_gpio_enable_irq_wake);
+
+void mctrl_gpio_disable_irq_wake(struct mctrl_gpios *gpios)
+{
+       enum mctrl_gpio_idx i;
+
+       if (!gpios)
+               return;
+
+       if (!gpios->mctrl_on)
+               return;
+
+       for (i = 0; i < UART_GPIO_MAX; ++i) {
+               if (!gpios->irq[i])
+                       continue;
+
+               disable_irq_wake(gpios->irq[i]);
+       }
+}
+EXPORT_SYMBOL_GPL(mctrl_gpio_disable_irq_wake);
+
 MODULE_LICENSE("GPL");

diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h
index b134a0ffc894c6df04e1393a4186bb744519c8c4..fc76910fb105a3d560e824baa43e9515576e895a 100644 (file)
--- a/drivers/tty/serial/serial_mctrl_gpio.h
+++ b/drivers/tty/serial/serial_mctrl_gpio.h
@@ -91,6 +91,16 @@ void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios);
  */
 void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios);
 
+/*
+ * Enable gpio wakeup interrupts to enable wake up source.
+ */
+void mctrl_gpio_enable_irq_wake(struct mctrl_gpios *gpios);
+
+/*
+ * Disable gpio wakeup interrupts to enable wake up source.
+ */
+void mctrl_gpio_disable_irq_wake(struct mctrl_gpios *gpios);
+
 #else /* GPIOLIB */
 
 static inline
@@ -142,6 +152,14 @@ static inline void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios)
 {
 }
 
+static inline void mctrl_gpio_enable_irq_wake(struct mctrl_gpios *gpios)
+{
+}
+
+static inline void mctrl_gpio_disable_irq_wake(struct mctrl_gpios *gpios)
+{
+}
+
 #endif /* GPIOLIB */
 
 #endif