pkg/driver_atwinc15x0: remove the compilation of the SPI Flash driver part

drivers/atwinc15x0/Makefile.dep

@@ -17,10 +17,3 @@ USEPKG += driver_atwinc15x0
 FEATURES_REQUIRED += periph_gpio
 FEATURES_REQUIRED += periph_gpio_irq
 FEATURES_REQUIRED += periph_spi
-
-# esp8266 and esp32 vendor code and atwinc15x0 both define conflicting
-# spi_flash_{read, write} functions.
-# esp8266 and esp32 already have build-in WiFi, so it's unlikely to ever
-# use this driver - just blacklist the architecture.
-FEATURES_BLACKLIST += arch_esp8266
-FEATURES_BLACKLIST += arch_esp32

drivers/atwinc15x0/atwinc15x0_bus.c

@@ -40,8 +40,7 @@ sint8 nm_bus_init(void *arg)
     assert(atwinc15x0);
     assert(gpio_is_valid(atwinc15x0->params.ssn_pin));
 
-    gpio_init(atwinc15x0->params.ssn_pin, GPIO_OUT);
-    gpio_set(atwinc15x0->params.ssn_pin);
+    spi_init_cs(atwinc15x0->params.spi, atwinc15x0->params.ssn_pin);
 
     nm_bsp_reset();
     nm_bsp_sleep(1);

pkg/driver_atwinc15x0/Makefile

@@ -20,4 +20,3 @@ CFLAGS += -Wno-pedantic
 all:
 	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/src/driver/source -f $(RIOTBASE)/Makefile.base MODULE=driver_atwinc15x0
 	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/src/common/source -f $(RIOTBASE)/Makefile.base MODULE=driver_atwinc15x0_common
-	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/src/spi_flash/source -f $(RIOTBASE)/Makefile.base MODULE=driver_atwinc15x0_spi_flash

pkg/driver_atwinc15x0/Makefile.dep

@@ -3,4 +3,3 @@ FEATURES_REQUIRED += periph_spi
 
 USEMODULE += driver_atwinc15x0
 USEMODULE += driver_atwinc15x0_common
-USEMODULE += driver_atwinc15x0_spi_flash

pkg/driver_atwinc15x0/patches/0012-nmdrv-don-t-call-spi_enable_flash-0.patch

@@ -0,0 +1,35 @@
+From 0abb3daceea8424cc277a2c0c01570099c495c96 Mon Sep 17 00:00:00 2001
+From: Gunar Schorcht <[email protected]>
+Date: Tue, 13 May 2025 18:47:45 +0200
+Subject: [PATCH 12/12] nmdrv: don't call spi_enable_flash(0)
+
+SPI Flash isn't used in RIOT. Disabling the SPI Flash with `spi_enable_flash(0)` is the only function call to the SPI Flash driver. Therefore we don't use the SPI Flash driver at all and comment out this call to prevent an undefined reference.
+---
+ src/driver/source/nmdrv.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/src/driver/source/nmdrv.c b/src/driver/source/nmdrv.c
+index 396ade953a2..160d84b011b 100644
+--- a/src/driver/source/nmdrv.c
++++ b/src/driver/source/nmdrv.c
+@@ -383,14 +383,14 @@ sint8 nm_drv_deinit(void * arg)
+ 		M2M_ERR("[nmi stop]: chip_deinit fail\n");
+ 		goto ERR1;
+ 	}
+-	
++#if 0 /* We don't use SPI Flash in RIOT */
+ 	/* Disable SPI flash to save power when the chip is off */
+-	ret = spi_flash_enable(0);
++    ret = spi_flash_enable(0);
+ 	if (M2M_SUCCESS != ret) {
+ 		M2M_ERR("[nmi stop]: SPI flash disable fail\n");
+ 		goto ERR1;
+ 	}
+-
++#endif
+ 	ret = nm_bus_iface_deinit();
+ 	if (M2M_SUCCESS != ret) {
+ 		M2M_ERR("[nmi stop]: fail init bus\n");
+-- 
+2.34.1
+