initial commit, taken and modified from linaro/insignal
diff --git a/exynos4/hal/libsensors/ak8973b.h b/exynos4/hal/libsensors/ak8973b.h
new file mode 100644
index 0000000..9b7ab60
--- /dev/null
+++ b/exynos4/hal/libsensors/ak8973b.h
@@ -0,0 +1,51 @@
+/*
+ * Definitions for akm8973 compass chip.
+ */
+#ifndef AKM8973_H
+#define AKM8973_H
+
+#include <linux/ioctl.h>
+
+#define AKM8973_I2C_NAME "ak8973b"
+
+#define AKMIO                   0xA1
+
+/* IOCTLs for AKM library */
+#define ECS_IOCTL_WRITE         _IOW(AKMIO, 0x01, char*)
+#define ECS_IOCTL_READ          _IOWR(AKMIO, 0x02, char*)
+#define ECS_IOCTL_RESET         _IO(AKMIO, 0x03)
+#define ECS_IOCTL_SET_MODE      _IOW(AKMIO, 0x04, short)
+#define ECS_IOCTL_GETDATA       _IOR(AKMIO, 0x05, char[SENSOR_DATA_SIZE])
+#define ECS_IOCTL_SET_YPR               _IOW(AKMIO, 0x06, short[12])
+#define ECS_IOCTL_GET_OPEN_STATUS       _IOR(AKMIO, 0x07, int)
+#define ECS_IOCTL_GET_CLOSE_STATUS      _IOR(AKMIO, 0x08, int)
+#define ECS_IOCTL_GET_DELAY             _IOR(AKMIO, 0x30, int64_t)
+#define ECS_IOCTL_GET_PROJECT_NAME      _IOR(AKMIO, 0x0D, char[64])
+#define ECS_IOCTL_GET_MATRIX            _IOR(AKMIO, 0x0E, short [4][3][3])
+
+/* IOCTLs for APPs */
+#define ECS_IOCTL_APP_SET_MODE          _IOW(AKMIO, 0x10, short)
+#define ECS_IOCTL_APP_SET_MFLAG         _IOW(AKMIO, 0x11, short)
+#define ECS_IOCTL_APP_GET_MFLAG         _IOW(AKMIO, 0x12, short)
+#define ECS_IOCTL_APP_SET_AFLAG         _IOW(AKMIO, 0x13, short)
+#define ECS_IOCTL_APP_GET_AFLAG         _IOR(AKMIO, 0x14, short)
+#define ECS_IOCTL_APP_SET_TFLAG         _IOR(AKMIO, 0x15, short)
+#define ECS_IOCTL_APP_GET_TFLAG         _IOR(AKMIO, 0x16, short)
+#define ECS_IOCTL_APP_RESET_PEDOMETER   _IO(AKMIO, 0x17)
+#define ECS_IOCTL_APP_SET_DELAY         _IOW(AKMIO, 0x18, int64_t)
+#define ECS_IOCTL_APP_GET_DELAY         ECS_IOCTL_GET_DELAY
+
+/* Set raw magnetic vector flag */
+#define ECS_IOCTL_APP_SET_MVFLAG        _IOW(AKMIO, 0x19, short)
+
+/* Get raw magnetic vector flag */
+#define ECS_IOCTL_APP_GET_MVFLAG        _IOR(AKMIO, 0x1A, short)
+
+struct akm8973_platform_data {
+        short layouts[4][3][3];
+        char project_name[64];
+        int gpio_RST;
+        int gpio_INT;
+};
+
+#endif