cpu/cc2538: Add Kconfig symbols

Also specify CPU_FAM in Makefile.features

cpu/cc2538/Kconfig

@@ -0,0 +1,46 @@
+# Copyright (c) 2020 HAW Hamburg
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+#
+
+config CPU_FAM_CC2538
+    bool
+    select CPU_CORE_CORTEX_M3
+    select HAS_CPU_CC2538
+    select HAS_PERIPH_CPUID
+    select HAS_PERIPH_GPIO
+    select HAS_PERIPH_GPIO_IRQ
+    select HAS_PERIPH_HWRNG
+    select HAS_PERIPH_UART_MODECFG
+    select HAS_CORTEXM_MPU
+    select HAS_PUF_SRAM
+
+## CPU Models
+config CPU_MODEL_CC2538NF53
+    bool
+    select CPU_FAM_CC2538
+
+config CPU_MODEL_CC2538SF53
+    bool
+    select CPU_FAM_CC2538
+
+## Definition of specific features
+config HAS_CPU_CC2538
+    bool
+    help
+        Indicates that a 'cc2538' cpu is being used.
+
+## Common CPU symbols
+config CPU_FAM
+    default "cc2538" if CPU_FAM_CC2538
+
+config CPU_MODEL
+    default "cc2538nf53" if CPU_MODEL_CC2538NF53
+    default "cc2538sf53" if CPU_MODEL_CC2538SF53
+
+config CPU
+    default "cc2538" if CPU_FAM_CC2538
+
+source "$(RIOTCPU)/cortexm_common/Kconfig"

cpu/cc2538/Makefile.features

@@ -1,4 +1,5 @@
 CPU_CORE = cortex-m3
+CPU_FAM = cc2538
 
 FEATURES_PROVIDED += periph_cpuid
 FEATURES_PROVIDED += periph_gpio periph_gpio_irq
@@ -8,4 +9,4 @@ FEATURES_PROVIDED += periph_uart_modecfg
 FEATURES_PROVIDED += cortexm_mpu
 FEATURES_PROVIDED += puf_sram
 
--include $(RIOTCPU)/cortexm_common/Makefile.features
+include $(RIOTCPU)/cortexm_common/Makefile.features