temp

.vscode/settings.json

@@ -3,7 +3,15 @@
         "kernel.h": "c",
         "slab.h": "c",
         "i2c.h": "c",
-        "i2c_engine.h": "c"
+        "i2c_engine.h": "c",
+        "module.h": "c",
+        "spi_engine.h": "c",
+        "spi.h": "c",
+        "i2c-smbus.h": "c",
+        "i2c-dev.h": "c",
+        "compiler.h": "c",
+        "input.h": "c",
+        "init.h": "c"
     },
     "C_Cpp.clang_format_style": "{ BasedOnStyle: Google, UseTab: Always, IndentWidth: 4, TabWidth: 4, BreakBeforeBraces: Linux, AllowShortIfStatementsOnASingleLine: true, IndentCaseLabels: false, ColumnLimit: 120}"
 }

driver/linux/Makefile

@@ -1,8 +1,8 @@
 obj-m += UniversalIO.o
-UniversalIO-objs += ./src/main.o ./src/i2c_engine.o ./src/spi_engine.o ./src/uart_engine.o
+UniversalIO-objs += ./src/main.o ./src/i2c_engine.o ./src/spi_engine.o ./src/uart_engine.o ./src/lib.o
 CONFIG_MODULE_SIG=n
 EXTRA_CFLAGS := -I$(src)/include
-I2C_BUS = 8
+I2C_BUS = 4
 
 reload: build
 	-sudo rmmod UniversalIO.ko

driver/linux/include/lib.h

@@ -0,0 +1,4 @@
+/* SPDX-License-Identifier: <SPDX License Expression> */
+#include <linux/module.h>
+
+void i2c_info(const char *format, ...);

driver/linux/include/spi_engine.h

@@ -1 +1,2 @@
 /* SPDX-License-Identifier: <SPDX License Expression> */
+#include <linux/spi/spi.h>

driver/linux/src/lib.c

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "lib.h"
+void i2c_info(const char *format, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, format);
+
+	vaf.fmt = format;
+	vaf.va = &args;
+
+	pr_info("%pV", &vaf);
+
+	va_end(args);
+}

driver/linux/src/main.c

@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-#include <linux/init.h>
-#include <linux/module.h>
-
+#include "lib.h"
 #include "i2c_engine.h"
 #include "spi_engine.h"
 #include "uart_engine.h"
@@ -14,7 +12,7 @@ static int __init my_i2c_init(void)
 		// i2c_put_adapter(&adapter);
 		return -ENODEV;
 	}
-	pr_info("hello i2c-%d!\n", adapter.nr);
+	i2c_info("hello i2c-%d!\n", adapter.nr);
 
 	return 0;
 }