[RFC PATCH V3 3/4] rust/hw/core: Provide some interfaces for the GPIO device

["Chen Miao" <chenmiao@openatom.club>]

From: chenmiao <chenmiao@openatom.club>

In qdev.rs, we implemented the init_gpio_out_named function, which corresponds
to the C function qdev_init_gpio_out_named. We also refactored the
init_gpio_out function to reuse the init_gpio_out_named interface.

Signed-off-by: Chen Miao <chenmiao@openatom.club>
---
 rust/hw/core/src/qdev.rs | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/rust/hw/core/src/qdev.rs b/rust/hw/core/src/qdev.rs
index c3097a284d..28da94dd0a 100644
--- a/rust/hw/core/src/qdev.rs
+++ b/rust/hw/core/src/qdev.rs
@@ -17,7 +17,7 @@
 
 pub use crate::bindings::{ClockEvent, DeviceClass, Property, ResetType};
 use crate::{
-    bindings::{self, qdev_init_gpio_in, qdev_init_gpio_out, ResettableClass},
+    bindings::{self, qdev_init_gpio_in, qdev_init_gpio_out_named, ResettableClass},
     irq::InterruptSource,
 };
 
@@ -399,11 +399,22 @@ fn do_init_gpio_in(
     }
 
     fn init_gpio_out(&self, pins: &[InterruptSource]) {
+        self.init_gpio_out_named(pins, "unnamed-gpio-out", pins.len());
+    }
+
+    fn init_gpio_out_named(&self, pins: &[InterruptSource], name: &str, n: usize) {
+        let c_name = if name.is_empty() {
+            CString::new("unnamed-gpio-out").unwrap()
+        } else {
+            CString::new(name).unwrap()
+        };
+
         unsafe {
-            qdev_init_gpio_out(
+            qdev_init_gpio_out_named(
                 self.upcast().as_mut_ptr(),
                 InterruptSource::slice_as_ptr(pins),
-                pins.len() as c_int,
+                c_name.as_ptr(),
+                n as c_int,
             );
         }
     }
-- 
2.43.0