samd51/Makefile: Change the variant support to dedicated .mk files.

That simplifies each of these files.

Signed-off-by: robert-hh <robert@hammelrath.com>

ports/samd/Makefile

@@ -25,9 +25,20 @@ UF2CONV ?= $(TOP)/tools/uf2conv.py
 MCU_SERIES_LOWER = $(shell echo $(MCU_SERIES) | tr '[:upper:]' '[:lower:]')
 
 include ../../py/mkenv.mk
+
+# Include board and MCU specific .mk files, and optional board variant .mk file.
 include $(BOARD_DIR)/mpconfigboard.mk
 include mcu/$(MCU_SERIES_LOWER)/mpconfigmcu.mk
 
+ifeq ($(BOARD_VARIANT),)
+-include mcu/$(MCU_SERIES_LOWER)/mpconfigvariant.mk
+else
+ifeq ($(wildcard mcu/$(MCU_SERIES_LOWER)/mpconfigvariant_$(BOARD_VARIANT).mk),)
+$(error Invalid BOARD_VARIANT specified: $(BOARD_VARIANT))
+endif
+include mcu/$(MCU_SERIES_LOWER)/mpconfigvariant_$(BOARD_VARIANT).mk
+endif
+
 # Qstr definitions (must come before including py.mk)
 QSTR_DEFS = qstrdefsport.h
 QSTR_GLOBAL_DEPENDENCIES = $(BOARD_DIR)/mpconfigboard.h mcu/$(MCU_SERIES_LOWER)/mpconfigmcu.h

ports/samd/mcu/samd51/mpconfigvariant_WLAN.mk

@@ -0,0 +1,16 @@
+MICROPY_PY_NETWORK = 1
+CFLAGS += -DMICROPY_PY_NETWORK=1
+MICROPY_PY_NETWORK_ESP_HOSTED = 1
+MICROPY_PY_LWIP = 1
+MICROPY_PY_SSL = 1
+MICROPY_SSL_MBEDTLS = 1
+
+SRC_C += \
+    esp_hosted_hal.c \
+    mpbthciport.c \
+    mpnimbleport.c \
+    mpnetworkport.c \
+    mbedtls/mbedtls_port.c
+
+INC += \
+    -Ilwip_inc

ports/samd/mcu/samd51/mpconfigvariant_WLAN_BLE.mk

@@ -0,0 +1,24 @@
+MICROPY_PY_NETWORK = 1
+CFLAGS += -DMICROPY_PY_NETWORK=1
+MICROPY_PY_NETWORK_ESP_HOSTED = 1
+MICROPY_PY_LWIP = 1
+
+ifeq ($(MICROPY_HW_CODESIZE), 1008K)
+    MICROPY_PY_SSL = 1
+    MICROPY_SSL_MBEDTLS = 1
+endif
+
+MICROPY_PY_BLUETOOTH = 1
+CFLAGS += -DMICROPY_PY_BLUETOOTH=$(MICROPY_PY_BLUETOOTH)
+MICROPY_BLUETOOTH_NIMBLE = 1
+MICROPY_BLUETOOTH_BTSTACK = 0
+
+SRC_C += \
+    esp_hosted_hal.c \
+    mpbthciport.c \
+    mpnimbleport.c \
+    mpnetworkport.c \
+    mbedtls/mbedtls_port.c
+
+INC += \
+    -Ilwip_inc