scripts: add exclude-pincodes to af signal configs

This add 'exclude-pincodes' to af model signal-configs. For GD32L233,
only the 'R' pincode have Segment LCD interface. 'exclude-pincodes'
help to remove the invalid alternate function from other pincodes.

Author: HaiLong Yang

pinconfigs/README.md

@@ -120,8 +120,13 @@ The AFIO model supports the following fields in the configuration file:
 
   Available configuration fields are:
 
-  - `exclude-memories`: A lit of memories where the signal is not available. If
-    not available, it is assumed that signal is available on all memories.
+  - `exclude-pincodes` (optional): A list of pincodes where the signal is not
+    available. If not defined, it is assumed that signal is available on all
+    pin codes.
+
+  - `exclude-memories` (optional): A lit of memories where the signal is not
+    available. If not available, it is assumed that signal is available on all
+    memories.
 
 - `pins` (required): Configuration for all pins.
 

scripts/gd32pinctrl.py

@@ -240,8 +240,13 @@ def build_af_pin_cfgs(variant, signal_configs, pins):
         pin_cfgs["ANALOG"].append((port, pin_number, "ANALOG"))
 
         for signal, mode in pin_cfg["afs"].items():
-            # check if signal is excluded from current list of memories
             signal_config = signal_configs.get(signal)
+            # check if signal is excluded from current pincode.
+            if signal_config and pincode in signal_config.get(
+                "exclude-pincodes", []
+            ):
+                continue
+            # check if signal is excluded from current list of memories
             if signal_config and set(memories).intersection(
                 signal_config.get("exclude-memories", [])
             ):

scripts/tests/gd32pinctrl/data/gd32f888x(0-1)xx-pinctrl.h

@@ -37,3 +37,9 @@
 	GD32_PINMUX_AF('A', 2, AF8)
 #define PERIPH2_SIGA_PA3 \
 	GD32_PINMUX_AF('A', 3, AF8)
+
+/* PERIPH4_SIGA */
+#define PERIPH4_SIGA_PA2 \
+	GD32_PINMUX_AF('A', 2, AF14)
+#define PERIPH4_SIGA_PA3 \
+	GD32_PINMUX_AF('A', 3, AF15)

scripts/tests/gd32pinctrl/data/gd32f888xx.yml

@@ -18,6 +18,11 @@ signal-configs:
     exclude-memories: [2, 3]
   PERIPH2_SIGB:
     exclude-memories: [2, 3]
+  PERIPH3_SIGA:
+    exclude-pincodes: [X]
+  PERIPH4_SIGA:
+    exclude-pincodes: [Y]
+    exclude-memories: [2, 3]
 
 pins:
   PA0:
@@ -34,8 +39,12 @@ pins:
     afs:
       PERIPH2_SIGA: 8
       PERIPH0_SIGA: 10
+      PERIPH3_SIGA: 13
+      PERIPH4_SIGA: 14
   PA3:
     pincodes: [X, Y]
     afs:
       PERIPH1_SIGB: 6
       PERIPH2_SIGA: 8
+      PERIPH3_SIGA: 12
+      PERIPH4_SIGA: 15

scripts/tests/gd32pinctrl/data/gd32f888y(0-1)xx-pinctrl.h

@@ -25,3 +25,9 @@
 	GD32_PINMUX_AF('A', 2, AF8)
 #define PERIPH2_SIGA_PA3 \
 	GD32_PINMUX_AF('A', 3, AF8)
+
+/* PERIPH3_SIGA */
+#define PERIPH3_SIGA_PA2 \
+	GD32_PINMUX_AF('A', 2, AF13)
+#define PERIPH3_SIGA_PA3 \
+	GD32_PINMUX_AF('A', 3, AF12)