[Qemu-devel] [PATCH v6 05/13] hw/stellaris: Removed gpio_out init array.

[Peter A. G. Crosthwaite]

stellaris_init() defines arrays of qemu_irq to decides what each of the GPIO
pins are connected to. This is ok for inputs (as an input can only have one
source) but is flawed for outputs as an output can connect to any number of
sinks. Removed the gpio_out array completely and just replaced its setters with
direct calls to qdev_connect_gpio_out().

Signed-off-by: Peter A. G. Crosthwaite <address@hidden>
---

 hw/stellaris.c |   26 ++++++++++++--------------
 1 files changed, 12 insertions(+), 14 deletions(-)

diff --git a/hw/stellaris.c b/hw/stellaris.c
index 01050d1..a7b68f4 100644
--- a/hw/stellaris.c
+++ b/hw/stellaris.c
@@ -1244,7 +1244,6 @@ static void stellaris_init(const char *kernel_filename, 
const char *cpu_model,
     qemu_irq *pic;
     DeviceState *gpio_dev[7];
     qemu_irq gpio_in[7][8];
-    qemu_irq gpio_out[7][8];
     qemu_irq adc;
     int sram_size;
     int flash_size;
@@ -1284,8 +1283,9 @@ static void stellaris_init(const char *kernel_filename, 
const char *cpu_model,
                                                pic[gpio_irq[i]]);
             for (j = 0; j < 8; j++) {
                 gpio_in[i][j] = qdev_get_gpio_in(gpio_dev[i], j);
-                gpio_out[i][j] = NULL;
             }
+        } else {
+            gpio_dev[i] = NULL;
         }
     }
 
@@ -1308,20 +1308,27 @@ static void stellaris_init(const char *kernel_filename, 
const char *cpu_model,
         if (board->peripherals & BP_OLED_SSI) {
             DeviceState *mux;
             void *bus;
+            qemu_irq select_pin;
 
             bus = qdev_get_child_bus(dev, "ssi");
             mux = ssi_create_slave(bus, "evb6965-ssi");
-            gpio_out[GPIO_D][0] = qdev_get_gpio_in(mux, 0);
+            select_pin = qdev_get_gpio_in(mux, 0);
+            if (gpio_dev[GPIO_D]) {
+                qdev_connect_gpio_out(gpio_dev[GPIO_D], 0, select_pin);
+            }
 
             bus = qdev_get_child_bus(mux, "ssi0");
             ssi_create_slave(bus, "ssi-sd");
 
             bus = qdev_get_child_bus(mux, "ssi1");
             dev = ssi_create_slave(bus, "ssd0323");
-            gpio_out[GPIO_C][7] = qdev_get_gpio_in(dev, 0);
+            if (gpio_dev[GPIO_C]) {
+                qdev_connect_gpio_out(gpio_dev[GPIO_C], 7,
+                                        qdev_get_gpio_in(dev, 0));
+            }
 
             /* Make sure the select pin is high.  */
-            qemu_irq_raise(gpio_out[GPIO_D][0]);
+            qemu_irq_raise(select_pin);
         }
     }
     if (board->dc4 & (1 << 28)) {
@@ -1347,15 +1354,6 @@ static void stellaris_init(const char *kernel_filename, 
const char *cpu_model,
 
         stellaris_gamepad_init(5, gpad_irq, gpad_keycode);
     }
-    for (i = 0; i < 7; i++) {
-        if (board->dc4 & (1 << i)) {
-            for (j = 0; j < 8; j++) {
-                if (gpio_out[i][j]) {
-                    qdev_connect_gpio_out(gpio_dev[i], j, gpio_out[i][j]);
-                }
-            }
-        }
-    }
 }
 
 /* FIXME: Figure out how to generate these from stellaris_boards.  */
-- 
1.7.0.4