chore: migrate src to solutions

solutions/02_modules/exercice08/Makefile

@@ -0,0 +1,23 @@
+# Part executed when called from kernel build system:
+ifneq ($(KERNELRELEASE),)
+obj-m += mymodule.o		## name of the generated module
+
+mymodule-objs := skeleton.o	## list of objects needed for that module
+
+# Part executed when called from standard make in module source directory:
+else
+include ../../buildroot_path
+include ../../kernel_settings
+PWD := $(shell pwd)
+
+all:
+	$(MAKE) -C $(KDIR) M=$(PWD) ARCH=$(CPU) CROSS_COMPILE=$(TOOLS) modules
+
+clean:
+	$(MAKE) -C $(KDIR) M=$(PWD) clean
+
+install:
+	$(MAKE) -C $(KDIR) M=$(PWD) INSTALL_MOD_PATH=$(MODPATH) modules_install
+
+endif
+

solutions/02_modules/exercice08/skeleton.c

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+/* skeleton.c */
+#include <linux/module.h>	/* needed by all modules */
+#include <linux/init.h>		/* needed for macros */
+#include <linux/kernel.h>	/* needed for debugging */
+
+#include <linux/interrupt.h>	/* needed for interrupt handling */
+#include <linux/gpio.h>			/* needed for i/o handling */
+
+
+#define K1	0
+#define K2	2
+#define K3	3
+
+static char* k1="gpio_a.0-k1";
+static char* k2="gpio_a.2-k2";
+static char* k3="gpio_a.3-k3";
+
+
+irqreturn_t gpio_isr(int irq, void* handle)
+{
+	pr_info ("interrupt %s raised...\n", (char*)handle);
+
+	return IRQ_HANDLED;
+}
+
+
+static int __init skeleton_init(void)
+{
+	int status = 0;
+
+	// install k1
+	if (status == 0) status = gpio_request (K1, "k1");
+	if (status == 0)
+		status = request_irq(gpio_to_irq(K1), gpio_isr,
+			IRQF_TRIGGER_FALLING | IRQF_SHARED, k1, k1);
+
+	// install k2
+	if (status == 0) status = gpio_request (K2, "k2");
+	if (status == 0)
+		status = request_irq(gpio_to_irq(K2), gpio_isr,
+			IRQF_TRIGGER_FALLING | IRQF_SHARED, k2, k2);
+
+	// install k3
+	if (status == 0) status = gpio_request (K3, "k3");
+	if (status == 0)
+		status = request_irq(gpio_to_irq(K3), gpio_isr,
+			IRQF_TRIGGER_FALLING | IRQF_SHARED, k3, k3);
+
+	pr_info ("Linux module 08 skeleton loaded\n");
+
+	return status;
+}
+
+static void __exit skeleton_exit(void)
+{
+	gpio_free(K1);
+	free_irq(gpio_to_irq(K1), k1);
+
+	gpio_free(K2);
+	free_irq(gpio_to_irq(K2), k2);
+
+	gpio_free(K3);
+	free_irq(gpio_to_irq(K3), k3);
+
+	pr_info ("Linux module skeleton unloaded\n");
+}
+
+module_init (skeleton_init);
+module_exit (skeleton_exit);
+
+MODULE_AUTHOR ("Daniel Gachet <daniel.gachet@hefr.ch>");
+MODULE_DESCRIPTION ("Module skeleton");
+MODULE_LICENSE ("GPL");
+