lib: cordic: Move cordic macros and defines to header file

Now that these macros are in header file, we can eventually
clean up the duplicate macros present in the drivers that
utilize the same cordic algorithm implementation.

Also add CORDIC_ prefix to nonprefixed macros.

Reviewed-by: Arend van Spriel <[e-mail]>
Signed-off-by: Priit Laes <[e-mail]>
Acked-by: Larry Finger <[e-mail]>
Signed-off-by: Kalle Valo <[e-mail]>

include/linux/cordic.h

···
 
 #include <linux/types.h>
 
+#define CORDIC_ANGLE_GEN	39797
+#define CORDIC_PRECISION_SHIFT	16
+#define CORDIC_NUM_ITER	(CORDIC_PRECISION_SHIFT + 2)
+
+#define CORDIC_FIXED(X)	((s32)((X) << CORDIC_PRECISION_SHIFT))
+#define CORDIC_FLOAT(X)	(((X) >= 0) \
+		? ((((X) >> (CORDIC_PRECISION_SHIFT - 1)) + 1) >> 1) \
+		: -((((-(X)) >> (CORDIC_PRECISION_SHIFT - 1)) + 1) >> 1))
+
 /**
  * struct cordic_iq - i/q coordinate.
  *

lib/cordic.c

···
 #include <linux/module.h>
 #include <linux/cordic.h>
 
-#define CORDIC_ANGLE_GEN	39797
-#define CORDIC_PRECISION_SHIFT	16
-#define	CORDIC_NUM_ITER		(CORDIC_PRECISION_SHIFT + 2)
-
-#define	FIXED(X)	((s32)((X) << CORDIC_PRECISION_SHIFT))
-#define	FLOAT(X)	(((X) >= 0) \
-		? ((((X) >> (CORDIC_PRECISION_SHIFT - 1)) + 1) >> 1) \
-		: -((((-(X)) >> (CORDIC_PRECISION_SHIFT - 1)) + 1) >> 1))
-
 static const s32 arctan_table[] = {
 	2949120,
 	1740967,
···
 	coord.q = 0;
 	angle = 0;
 
-	theta = FIXED(theta);
+	theta = CORDIC_FIXED(theta);
 	signtheta = (theta < 0) ? -1 : 1;
-	theta = ((theta + FIXED(180) * signtheta) % FIXED(360)) -
-		FIXED(180) * signtheta;
+	theta = ((theta + CORDIC_FIXED(180) * signtheta) % CORDIC_FIXED(360)) -
+		CORDIC_FIXED(180) * signtheta;
 
-	if (FLOAT(theta) > 90) {
-		theta -= FIXED(180);
+	if (CORDIC_FLOAT(theta) > 90) {
+		theta -= CORDIC_FIXED(180);
 		signx = -1;
-	} else if (FLOAT(theta) < -90) {
-		theta += FIXED(180);
+	} else if (CORDIC_FLOAT(theta) < -90) {
+		theta += CORDIC_FIXED(180);
 		signx = -1;
 	}