From 586f495b1e78c27e141ff432dd971eb41866fb80 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <f4bug@amsat.org>
Date: Tue, 23 Jun 2020 09:27:23 +0200
Subject: [PATCH] hw/misc/pca9552: Model qdev output GPIOs
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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.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20200623072723.6324-10-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/misc/pca9552.c         | 6 ++++++
 include/hw/misc/pca9552.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/hw/misc/pca9552.c b/hw/misc/pca9552.c
index 1c3ad57432..80caa9ec8f 100644
--- a/hw/misc/pca9552.c
+++ b/hw/misc/pca9552.c
@@ -17,6 +17,7 @@
 #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"
@@ -111,9 +112,11 @@ static void pca955x_update_pin_input(PCA955xState *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:
@@ -374,11 +377,14 @@ static void pca955x_initfn(Object *obj)
 
 static void pca955x_realize(DeviceState *dev, Error **errp)
 {
+    PCA955xClass *k = PCA955X_GET_CLASS(dev);
     PCA955xState *s = PCA955X(dev);
 
     if (!s->description) {
         s->description = g_strdup("pca-unspecified");
     }
+
+    qdev_init_gpio_out(dev, s->gpio, k->pin_count);
 }
 
 static Property pca955x_properties[] = {
diff --git a/include/hw/misc/pca9552.h b/include/hw/misc/pca9552.h
index bf1a589137..600356fbf9 100644
--- a/include/hw/misc/pca9552.h
+++ b/include/hw/misc/pca9552.h
@@ -27,6 +27,7 @@ typedef struct PCA955xState {
     uint8_t pointer;
 
     uint8_t regs[PCA955X_NR_REGS];
+    qemu_irq gpio[PCA955X_PIN_COUNT_MAX];
     char *description; /* For debugging purpose only */
 } PCA955xState;