[PATCH v4 8/8] hw/misc/pca9552: Model qdev output GPIOs

[Philippe Mathieu-Daudé]

The PCA9552 has 16 GPIOs which can be used as input,
output or PWM mode. QEMU models the output GPIO with
the qemu_irq type. Let the device expose the 16 GPIOs
to allow us to later connect LEDs to these outputs.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 include/hw/misc/pca9552.h | 1 +
 hw/misc/pca9552.c         | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/include/hw/misc/pca9552.h b/include/hw/misc/pca9552.h
index 755be2e8e5..2545087da3 100644
--- a/include/hw/misc/pca9552.h
+++ b/include/hw/misc/pca9552.h
@@ -30,6 +30,7 @@ typedef struct PCA9552State {
     uint8_t max_reg;
     char *description; /* For debugging purpose only */
     uint8_t nr_leds;
+    qemu_irq gpio[PCA9552_PIN_COUNT];
 } PCA9552State;
 
 #endif
diff --git a/hw/misc/pca9552.c b/hw/misc/pca9552.c
index 85557b78d9..8f0ce19b74 100644
--- a/hw/misc/pca9552.c
+++ b/hw/misc/pca9552.c
@@ -16,6 +16,7 @@
 #include "hw/qdev-properties.h"
 #include "hw/misc/pca9552.h"
 #include "hw/misc/pca9552_regs.h"
+#include "hw/irq.h"
 #include "migration/vmstate.h"
 #include "qapi/error.h"
 #include "qapi/visitor.h"
@@ -88,9 +89,11 @@ static void pca9552_update_pin_input(PCA9552State *s)
 
         switch (config) {
         case PCA9552_LED_ON:
+            qemu_set_irq(s->gpio[i], 1);
             s->regs[input_reg] |= 1 << input_shift;
             break;
         case PCA9552_LED_OFF:
+            qemu_set_irq(s->gpio[i], 0);
             s->regs[input_reg] &= ~(1 << input_shift);
             break;
         case PCA9552_LED_PWM0:
@@ -360,6 +363,7 @@ static void pca9552_realize(DeviceState *dev, Error **errp)
     if (!s->description) {
         s->description = g_strdup("pca-unspecified");
     }
+    qdev_init_gpio_out(dev, s->gpio, s->nr_leds);
 }
 
 static Property pca9552_properties[] = {
-- 
2.21.3