scripts: dts: gen_defines: Generate interrupt-controller macro

Extend the gen_defines.py write_interrupts(node) function to
generate macros to get the interrupt controller for an
interrupt specifier by idx and by name.

The information is already generated by edtlib.py and stored in
node.interrupts[].controller. This addition uses the node pointed
to by the controller member to generate the following example output

define DT_N_S_device1_IRQ_IDX_0_CONTROLLER \
       DT_N_S_gpio_800

define DT_N_S_device1_IRQ_NAME_test4_CONTROLLER \
       N_S_device1_IRQ_IDX_0_CONTROLLER

Signed-off-by: Bjarki Arge Andreasen <[email protected]>

doc/build/dts/macros.bnf

@@ -40,8 +40,10 @@ node-macro =/ %s"DT_N" path-id %s"_IRQ_NUM"
 node-macro =/ %s"DT_N" path-id %s"_IRQ_IDX_" DIGIT "_EXISTS"
 node-macro =/ %s"DT_N" path-id %s"_IRQ_IDX_" DIGIT
               %s"_VAL_" dt-name [ %s"_EXISTS" ]
+node-macro =/ %s"DT_N" path-id %s"_CONTROLLER"
 node-macro =/ %s"DT_N" path-id %s"_IRQ_NAME_" dt-name
               %s"_VAL_" dt-name [ %s"_EXISTS" ]
+node-macro =/ %s"DT_N" path-id %s"_IRQ_NAME_" dt-name "_CONTROLLER"
 ; The ranges property is also special.
 node-macro =/ %s"DT_N" path-id %s"_RANGES_NUM"
 node-macro =/ %s"DT_N" path-id %s"_RANGES_IDX_" DIGIT "_EXISTS"

scripts/dts/gen_defines.py

@@ -477,6 +477,13 @@ def map_arm_gic_irq_type(irq, irq_num):
                 name_vals.append((name_macro, f"DT_{idx_macro}"))
                 name_vals.append((name_macro + "_EXISTS", 1))
 
+        idx_controller_macro = f"{path_id}_IRQ_IDX_{i}_CONTROLLER"
+        idx_controller_path = f"DT_{irq.controller.z_path_id}"
+        idx_vals.append((idx_controller_macro, idx_controller_path))
+        if irq.name:
+            name_controller_macro = f"{path_id}_IRQ_NAME_{str2ident(irq.name)}_CONTROLLER"
+            name_vals.append((name_controller_macro, f"DT_{idx_controller_macro}"))
+
     for macro, val in idx_vals:
         out_dt_define(macro, val)
     for macro, val in name_vals: