Up until now, the EXTI implementation had 16 inbound GPIOs connected to
the 16 outbound GPIOs of STM32L4x5 SYSCFG.
The EXTI actually handles 40 lines (namely 5 from STM32L4x5 USART
devices which are already implemented in QEMU).
In order to connect USART devices to EXTI, this commit consolidates
constants `EXTI_NUM_INTERRUPT_OUT_LINES` (40) and
`EXTI_NUM_GPIO_EVENT_IN_LINES` (16) into `EXTI_NUM_LINES` (40).

Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/hw/misc/stm32l4x5_exti.h | 4 ++--
 hw/misc/stm32l4x5_exti.c         | 6 ++----
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/include/hw/misc/stm32l4x5_exti.h b/include/hw/misc/stm32l4x5_exti.h
index 55f763fa37..62f79362f2 100644
--- a/include/hw/misc/stm32l4x5_exti.h
+++ b/include/hw/misc/stm32l4x5_exti.h
@@ -30,7 +30,7 @@
 #define TYPE_STM32L4X5_EXTI "stm32l4x5-exti"
 OBJECT_DECLARE_SIMPLE_TYPE(Stm32l4x5ExtiState, STM32L4X5_EXTI)
 
-#define EXTI_NUM_INTERRUPT_OUT_LINES 40
+#define EXTI_NUM_LINES 40
 #define EXTI_NUM_REGISTER 2
 
 struct Stm32l4x5ExtiState {
@@ -47,7 +47,7 @@ struct Stm32l4x5ExtiState {
 
     /* used for edge detection */
     uint32_t irq_levels[EXTI_NUM_REGISTER];
-    qemu_irq irq[EXTI_NUM_INTERRUPT_OUT_LINES];
+    qemu_irq irq[EXTI_NUM_LINES];
 };
 
 #endif
diff --git a/hw/misc/stm32l4x5_exti.c b/hw/misc/stm32l4x5_exti.c
index 6a2ec62d78..b9a69a69f6 100644
--- a/hw/misc/stm32l4x5_exti.c
+++ b/hw/misc/stm32l4x5_exti.c
@@ -42,7 +42,6 @@
 #define EXTI_SWIER2 0x30
 #define EXTI_PR2    0x34
 
-#define EXTI_NUM_GPIO_EVENT_IN_LINES 16
 #define EXTI_MAX_IRQ_PER_BANK 32
 #define EXTI_IRQS_BANK0  32
 #define EXTI_IRQS_BANK1  8
@@ -238,7 +237,7 @@ static void stm32l4x5_exti_init(Object *obj)
 {
     Stm32l4x5ExtiState *s = STM32L4X5_EXTI(obj);
 
-    for (size_t i = 0; i < EXTI_NUM_INTERRUPT_OUT_LINES; i++) {
+    for (size_t i = 0; i < EXTI_NUM_LINES; i++) {
         sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq[i]);
     }
 
@@ -246,8 +245,7 @@ static void stm32l4x5_exti_init(Object *obj)
                           TYPE_STM32L4X5_EXTI, 0x400);
     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 
-    qdev_init_gpio_in(DEVICE(obj), stm32l4x5_exti_set_irq,
-                      EXTI_NUM_GPIO_EVENT_IN_LINES);
+    qdev_init_gpio_in(DEVICE(obj), stm32l4x5_exti_set_irq, EXTI_NUM_LINES);
 }
 
 static const VMStateDescription vmstate_stm32l4x5_exti = {
-- 
2.43.2