dts: edtlib: extract gpio led nodes

Extract the gpio led child node of gpio leds controller nodes.

Extend the Node class with properties for:

  gpio_leds:
    A list of ControllerAndData objects of the leds a gpio leds
    controller controls. The list is empty if the node is not a
    gpio leds controller or it does not have gpio led children.

Signed-off-by: Bobby Noelte <[email protected]>

Author: b0661

scripts/dts/edtlib.py

@@ -516,6 +516,7 @@ def _init_nodes(self):
             # These depend on the referenced nodes' props already initialized.
             node._init_pinctrls()
             node._init_partitions()
+            node._init_gpio_leds()
 
     def _init_compat2enabled(self):
         # Creates self.compat2enabled
@@ -794,6 +795,11 @@ class Node:
       node, sorted by index. The list is empty if the node does not have a
       #clock-cells property.
 
+    gpio_leds:
+      A list of ControllerAndData objects of the leds a gpio leds controller
+      controls. The list is empty if the node is not a gpio leds controller or
+      it does not have and gpio led children.
+
     interrupts:
       A list of ControllerAndData objects for the interrupts generated by the
       node. The list is empty if the node does not generate interrupts.
@@ -1386,6 +1392,40 @@ def _init_clock_outputs(self):
                                 clock_outputs_name_indices, clock_output_names,
                                 clock_frequency, clock_accuracy)
 
+    def _init_gpio_leds(self):
+        # Initializes self.gpio_leds
+
+        if not hasattr(self, 'gpio_leds'):
+            self.gpio_leds = []
+
+        if not self.parent or "gpio-leds" not in self.parent.compats:
+            # Not a child of a gpio leds controller
+            return
+
+        gpio_leds_controller = self.parent
+
+        gpio_led = ControllerAndData()
+        gpio_led.node = self
+        gpio_led.name = None
+        gpio_led.controller = gpio_leds_controller
+        gpio_led.data = {}
+        for prop_name, prop_value in self.props.items():
+            if prop_name == 'label':
+                gpio_led.name = prop_value.val
+            else:
+                gpio_led.data[prop_name] = prop_value.val
+
+        # Assure the gpio led gets a name
+        if not gpio_led.name:
+            # From Linux leds/common.txt: "If omitted, the label is taken from
+            # the node name (excluding the unit address)."
+            gpio_led.name = self.name.split('@')[0]
+
+        # Append led to the list of leds of the gpio leds controller
+        if not hasattr(gpio_leds_controller, 'gpio_leds'):
+            gpio_leds_controller.gpio_leds = []
+        gpio_leds_controller.gpio_leds.append(gpio_led)
+
     def _init_regs(self):
         # Initializes self.regs