sh-pfc: r8a7778: add common PFC macro helper

pfc-r8a7778 will have many devices pfc support in the future,
and current pfc-r8a7778 is using pin/mux definition macro for SCIF.
The device definition style using macro is readable code IMO,
but creating new macro for each devices is not good sense.
This patch adds common SH_PFC_xx() macro for each new feature devices
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

drivers/pinctrl/sh-pfc/pfc-r8a7778.c

@@ -1303,15 +1303,25 @@ static struct sh_pfc_pin pinmux_pins[] = {
  */
 #define PIN_NUMBER(row, col)		(1000+((row)-1)*25+(col)-1)
 
-/* - SCIF macro ------------------------------------------------------------- */
-#define SCIF_PFC_PIN(name, args...)					\
+/* - macro */
+#define SH_PFC_PINS(name, args...) \
 	static const unsigned int name ##_pins[] = { args }
-#define SCIF_PFC_DAT(name, tx, rx)					\
-	static const unsigned int name ##_mux[]  = { tx##_MARK, rx##_MARK, }
-#define SCIF_PFC_CTR(name, cts, rts)					\
-	static const unsigned int name ##_mux[]  = { cts##_MARK, rts##_MARK, }
-#define SCIF_PFC_CLK(name, sck)					\
-	static const unsigned int name ##_mux[]  = { sck##_MARK, }
+#define SH_PFC_MUX1(name, arg1)					\
+	static const unsigned int name ##_mux[]  = { arg1##_MARK }
+#define SH_PFC_MUX2(name, arg1, arg2)					\
+	static const unsigned int name ##_mux[]  = { arg1##_MARK, arg2##_MARK, }
+#define SH_PFC_MUX3(name, arg1, arg2, arg3)					\
+	static const unsigned int name ##_mux[]  = { arg1##_MARK, arg2##_MARK,	\
+						     arg3##_MARK }
+#define SH_PFC_MUX4(name, arg1, arg2, arg3, arg4)			\
+	static const unsigned int name ##_mux[]  = { arg1##_MARK, arg2##_MARK, \
+						     arg3##_MARK, arg4##_MARK }
+
+/* - SCIF macro ------------------------------------------------------------- */
+#define SCIF_PFC_PIN(name, args...)	SH_PFC_PINS(name, args)
+#define SCIF_PFC_DAT(name, tx, rx)	SH_PFC_MUX2(name, tx, rx)
+#define SCIF_PFC_CTR(name, cts, rts)	SH_PFC_MUX2(name, cts, rts)
+#define SCIF_PFC_CLK(name, sck)		SH_PFC_MUX1(name, sck)
 
 /* - HSCIF0 ----------------------------------------------------------------- */
 SCIF_PFC_PIN(hscif0_data_a,	RCAR_GP_PIN(1, 17),	RCAR_GP_PIN(1, 18));