sh-pfc: r8a7778: add I2C pin groups

Add I2C SDA/SCL pin groups to R8A7778 PFC driver.
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

@@ -1371,6 +1371,32 @@ SCIF_PFC_CLK(hscif1_clk_a,	HSCK1_A);
 SCIF_PFC_PIN(hscif1_clk_b,	RCAR_GP_PIN(4, 2));
 SCIF_PFC_CLK(hscif1_clk_b,	HSCK1_B);
 
+/* - I2C macro ------------------------------------------------------------- */
+#define I2C_PFC_PIN(name, args...)	SH_PFC_PINS(name, args)
+#define I2C_PFC_MUX(name, sda, scl)	SH_PFC_MUX2(name, sda, scl)
+
+/* - I2C1 ------------------------------------------------------------------ */
+I2C_PFC_PIN(i2c1_a,	RCAR_GP_PIN(3, 8),	RCAR_GP_PIN(3, 9));
+I2C_PFC_MUX(i2c1_a,	SDA1_A,			SCL1_A);
+I2C_PFC_PIN(i2c1_b,	RCAR_GP_PIN(4, 17),	RCAR_GP_PIN(4, 18));
+I2C_PFC_MUX(i2c1_b,	SDA1_B,			SCL1_B);
+
+/* - I2C2 ------------------------------------------------------------------ */
+I2C_PFC_PIN(i2c2_a,	PIN_NUMBER(3, 20),	RCAR_GP_PIN(1, 3));
+I2C_PFC_MUX(i2c2_a,	SDA2_A,			SCL2_A);
+I2C_PFC_PIN(i2c2_b,	RCAR_GP_PIN(0, 3),	RCAR_GP_PIN(0, 4));
+I2C_PFC_MUX(i2c2_b,	SDA2_B,			SCL2_B);
+I2C_PFC_PIN(i2c2_c,	RCAR_GP_PIN(4, 15),	RCAR_GP_PIN(4, 16));
+I2C_PFC_MUX(i2c2_c,	SDA2_C,			SCL2_C);
+
+/* - I2C3 ------------------------------------------------------------------ */
+I2C_PFC_PIN(i2c3_a,	RCAR_GP_PIN(1, 14),	RCAR_GP_PIN(1, 15));
+I2C_PFC_MUX(i2c3_a,	SDA3_A,			SCL3_A);
+I2C_PFC_PIN(i2c3_b,	RCAR_GP_PIN(1, 16),	RCAR_GP_PIN(1, 19));
+I2C_PFC_MUX(i2c3_b,	SDA3_B,			SCL3_B);
+I2C_PFC_PIN(i2c3_c,	RCAR_GP_PIN(1, 22),	RCAR_GP_PIN(1, 23));
+I2C_PFC_MUX(i2c3_c,	SDA3_C,			SCL3_C);
+
 /* - SCIF CLOCK ------------------------------------------------------------- */
 SCIF_PFC_PIN(scif_clk,		RCAR_GP_PIN(1, 16));
 SCIF_PFC_CLK(scif_clk,		SCIF_CLK);
@@ -1584,6 +1610,14 @@ static const struct sh_pfc_pin_group pinmux_groups[] = {
 	SH_PFC_PIN_GROUP(hscif1_ctrl_b),
 	SH_PFC_PIN_GROUP(hscif1_clk_a),
 	SH_PFC_PIN_GROUP(hscif1_clk_b),
+	SH_PFC_PIN_GROUP(i2c1_a),
+	SH_PFC_PIN_GROUP(i2c1_b),
+	SH_PFC_PIN_GROUP(i2c2_a),
+	SH_PFC_PIN_GROUP(i2c2_b),
+	SH_PFC_PIN_GROUP(i2c2_c),
+	SH_PFC_PIN_GROUP(i2c3_a),
+	SH_PFC_PIN_GROUP(i2c3_b),
+	SH_PFC_PIN_GROUP(i2c3_c),
 	SH_PFC_PIN_GROUP(scif_clk),
 	SH_PFC_PIN_GROUP(scif0_data_a),
 	SH_PFC_PIN_GROUP(scif0_data_b),
@@ -1676,6 +1710,23 @@ static const char * const hscif1_groups[] = {
 	"hscif1_clk_b",
 };
 
+static const char * const i2c1_groups[] = {
+	"i2c1_a",
+	"i2c1_b",
+};
+
+static const char * const i2c2_groups[] = {
+	"i2c2_a",
+	"i2c2_b",
+	"i2c2_c",
+};
+
+static const char * const i2c3_groups[] = {
+	"i2c3_a",
+	"i2c3_b",
+	"i2c3_c",
+};
+
 static const char * const scif_clk_groups[] = {
 	"scif_clk",
 };
@@ -1790,6 +1841,9 @@ static const struct sh_pfc_function pinmux_functions[] = {
 	SH_PFC_FUNCTION(ether),
 	SH_PFC_FUNCTION(hscif0),
 	SH_PFC_FUNCTION(hscif1),
+	SH_PFC_FUNCTION(i2c1),
+	SH_PFC_FUNCTION(i2c2),
+	SH_PFC_FUNCTION(i2c3),
 	SH_PFC_FUNCTION(scif_clk),
 	SH_PFC_FUNCTION(scif0),
 	SH_PFC_FUNCTION(scif1),