fix address math issues

axi.c

@@ -52,7 +52,7 @@ zt_flink_axi_read_register(uint32_t address, void* private_data)
 
 static void zt_flink_axi_write_register(uint32_t address, uint32_t value, void* private_data)
 {
-    uint32_t* base = (uint32_t*)private_data;
+    uint8_t* base = (uint8_t*)private_data;
     iowrite32(value, base + address);
 }
 

bus.c

@@ -227,12 +227,17 @@ EXPORT_SYMBOL(zt_flink_controller_register);
 
 uint32_t zt_flink_read_register(struct zt_flink_device* device, uint32_t address)
 {
-    return device->controller->read_register(device->start + address, device->controller->private_data);
+    uint32_t offset = device->start + address;
+    uint32_t value = device->controller->read_register(offset, device->controller->private_data);
+    dev_info(&device->dev, "read 0x%x at 0x%x", value, offset);
+    return value;
 }
 EXPORT_SYMBOL(zt_flink_read_register);
 void zt_flink_write_register(struct zt_flink_device* device, uint32_t address, uint32_t value)
 {
-    device->controller->write_register(device->start + address, value, device->controller->private_data);
+    uint32_t offset = device->start + address;
+    dev_info(&device->dev, "writing 0x%x at 0x%x", value, offset);
+    device->controller->write_register(offset, value, device->controller->private_data);
 }
 EXPORT_SYMBOL(zt_flink_write_register);