[PATCH 2/3] hw/gpio/avr_gpio.c: add tracing for read and writes

[G S Niteesh Babu]

Added tracing for gpio read, write, and update output irq.

1) trace_avr_gpio_update_ouput_irq
2) trace_avr_gpio_read
3) trace_avr_gpio_write

Signed-off-by: G S Niteesh Babu <niteesh.gs@gmail.com>
---
 hw/gpio/avr_gpio.c   | 16 ++++++++++++----
 hw/gpio/trace-events |  6 ++++++
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/hw/gpio/avr_gpio.c b/hw/gpio/avr_gpio.c
index 8fc192dbcb..8498a99dd2 100644
--- a/hw/gpio/avr_gpio.c
+++ b/hw/gpio/avr_gpio.c
@@ -26,6 +26,7 @@
 #include "hw/irq.h"
 #include "hw/gpio/avr_gpio.h"
 #include "hw/qdev-properties.h"
+#include "trace.h"
 
 static void avr_gpio_reset(DeviceState *dev)
 {
@@ -49,6 +50,7 @@ static void avr_gpio_write_port(AVRGPIOState *s, uint64_t 
value)
 
         if (cur_ddr_pin_val && (cur_port_pin_val != new_port_pin_val)) {
             qemu_set_irq(s->out[pin], new_port_pin_val);
+            trace_avr_gpio_update_output_irq(pin, new_port_pin_val);
         }
         cur_port_val >>= 1u;
         cur_ddr_val >>= 1u;
@@ -58,19 +60,25 @@ static void avr_gpio_write_port(AVRGPIOState *s, uint64_t 
value)
 }
 static uint64_t avr_gpio_read(void *opaque, hwaddr offset, unsigned int size)
 {
+    uint8_t val = 0;
     AVRGPIOState *s = (AVRGPIOState *)opaque;
     switch (offset) {
     case GPIO_PIN:
-        return s->reg.pin;
+        val = s->reg.pin;
+        break;
     case GPIO_DDR:
-        return s->reg.ddr;
+        val = s->reg.ddr;
+        break;
     case GPIO_PORT:
-        return s->reg.port;
+        val = s->reg.port;
+        break;
     default:
         g_assert_not_reached();
         break;
     }
-    return 0;
+
+    trace_avr_gpio_read(offset, val);
+    return val;
 }
 
 static void avr_gpio_write(void *opaque, hwaddr offset, uint64_t value,
diff --git a/hw/gpio/trace-events b/hw/gpio/trace-events
index 46ab9323bd..a054def07c 100644
--- a/hw/gpio/trace-events
+++ b/hw/gpio/trace-events
@@ -18,3 +18,9 @@ sifive_gpio_read(uint64_t offset, uint64_t r) "offset 0x%" 
PRIx64 " value 0x%" P
 sifive_gpio_write(uint64_t offset, uint64_t value) "offset 0x%" PRIx64 " value 
0x%" PRIx64
 sifive_gpio_set(int64_t line, int64_t value) "line %" PRIi64 " value %" PRIi64
 sifive_gpio_update_output_irq(int64_t line, int64_t value) "line %" PRIi64 " 
value %" PRIi64
+
+# avr_gpio.c
+avr_gpio_read(uint64_t offset, uint64_t r) "offset 0x%" PRIx64 " value 0x%" 
PRIx64
+avr_gpio_write(uint64_t offset, uint64_t value) "offset 0x%" PRIx64 " value 
0x%" PRIx64
+avr_gpio_set(int64_t line, int64_t value) "line %" PRIi64 " value %" PRIi64
+avr_gpio_update_output_irq(int64_t line, int64_t value) "pin %" PRIi64 " value 
%" PRIi64
-- 
2.17.1