pinctrl: sh-pfc: r8a7796: Add DU support

Only the DU parallel RGB output signals are included, HDMI and TCON pins
will be added in separate groups. Based on a similar patch from Laurent
Pinchart for the r8a7795 PFC driver.

Signed-off-by: Niklas Söderlund <[e-mail]>
Reviewed-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Geert Uytterhoeven <[e-mail]>

drivers/pinctrl/sh-pfc/pfc-r8a7796.c

···
 	RIF3_D1_B_MARK,
 };
 
+/* - DU --------------------------------------------------------------------- */
+static const unsigned int du_rgb666_pins[] = {
+	/* R[7:2], G[7:2], B[7:2] */
+	RCAR_GP_PIN(0, 15), RCAR_GP_PIN(0, 14), RCAR_GP_PIN(0, 13),
+	RCAR_GP_PIN(0, 12), RCAR_GP_PIN(0, 11), RCAR_GP_PIN(0, 10),
+	RCAR_GP_PIN(1, 15), RCAR_GP_PIN(1, 14), RCAR_GP_PIN(1, 13),
+	RCAR_GP_PIN(1, 12), RCAR_GP_PIN(1, 19), RCAR_GP_PIN(1, 18),
+	RCAR_GP_PIN(1, 7),  RCAR_GP_PIN(1, 6),  RCAR_GP_PIN(1, 5),
+	RCAR_GP_PIN(1, 4),  RCAR_GP_PIN(1, 3),  RCAR_GP_PIN(1, 2),
+};
+static const unsigned int du_rgb666_mux[] = {
+	DU_DR7_MARK, DU_DR6_MARK, DU_DR5_MARK, DU_DR4_MARK,
+	DU_DR3_MARK, DU_DR2_MARK,
+	DU_DG7_MARK, DU_DG6_MARK, DU_DG5_MARK, DU_DG4_MARK,
+	DU_DG3_MARK, DU_DG2_MARK,
+	DU_DB7_MARK, DU_DB6_MARK, DU_DB5_MARK, DU_DB4_MARK,
+	DU_DB3_MARK, DU_DB2_MARK,
+};
+static const unsigned int du_rgb888_pins[] = {
+	/* R[7:0], G[7:0], B[7:0] */
+	RCAR_GP_PIN(0, 15), RCAR_GP_PIN(0, 14), RCAR_GP_PIN(0, 13),
+	RCAR_GP_PIN(0, 12), RCAR_GP_PIN(0, 11), RCAR_GP_PIN(0, 10),
+	RCAR_GP_PIN(0, 9),  RCAR_GP_PIN(0, 8),
+	RCAR_GP_PIN(1, 15), RCAR_GP_PIN(1, 14), RCAR_GP_PIN(1, 13),
+	RCAR_GP_PIN(1, 12), RCAR_GP_PIN(1, 19), RCAR_GP_PIN(1, 18),
+	RCAR_GP_PIN(1, 17), RCAR_GP_PIN(1, 16),
+	RCAR_GP_PIN(1, 7),  RCAR_GP_PIN(1, 6),  RCAR_GP_PIN(1, 5),
+	RCAR_GP_PIN(1, 4),  RCAR_GP_PIN(1, 3),  RCAR_GP_PIN(1, 2),
+	RCAR_GP_PIN(1, 1),  RCAR_GP_PIN(1, 0),
+};
+static const unsigned int du_rgb888_mux[] = {
+	DU_DR7_MARK, DU_DR6_MARK, DU_DR5_MARK, DU_DR4_MARK,
+	DU_DR3_MARK, DU_DR2_MARK, DU_DR1_MARK, DU_DR0_MARK,
+	DU_DG7_MARK, DU_DG6_MARK, DU_DG5_MARK, DU_DG4_MARK,
+	DU_DG3_MARK, DU_DG2_MARK, DU_DG1_MARK, DU_DG0_MARK,
+	DU_DB7_MARK, DU_DB6_MARK, DU_DB5_MARK, DU_DB4_MARK,
+	DU_DB3_MARK, DU_DB2_MARK, DU_DB1_MARK, DU_DB0_MARK,
+};
+static const unsigned int du_clk_out_0_pins[] = {
+	/* CLKOUT */
+	RCAR_GP_PIN(1, 27),
+};
+static const unsigned int du_clk_out_0_mux[] = {
+	DU_DOTCLKOUT0_MARK
+};
+static const unsigned int du_clk_out_1_pins[] = {
+	/* CLKOUT */
+	RCAR_GP_PIN(2, 3),
+};
+static const unsigned int du_clk_out_1_mux[] = {
+	DU_DOTCLKOUT1_MARK
+};
+static const unsigned int du_sync_pins[] = {
+	/* EXVSYNC/VSYNC, EXHSYNC/HSYNC */
+	RCAR_GP_PIN(2, 5), RCAR_GP_PIN(2, 4),
+};
+static const unsigned int du_sync_mux[] = {
+	DU_EXVSYNC_DU_VSYNC_MARK, DU_EXHSYNC_DU_HSYNC_MARK
+};
+static const unsigned int du_oddf_pins[] = {
+	/* EXDISP/EXODDF/EXCDE */
+	RCAR_GP_PIN(2, 2),
+};
+static const unsigned int du_oddf_mux[] = {
+	DU_EXODDF_DU_ODDF_DISP_CDE_MARK,
+};
+static const unsigned int du_cde_pins[] = {
+	/* CDE */
+	RCAR_GP_PIN(2, 0),
+};
+static const unsigned int du_cde_mux[] = {
+	DU_CDE_MARK,
+};
+static const unsigned int du_disp_pins[] = {
+	/* DISP */
+	RCAR_GP_PIN(2, 1),
+};
+static const unsigned int du_disp_mux[] = {
+	DU_DISP_MARK,
+};
+
 /* - I2C -------------------------------------------------------------------- */
 static const unsigned int i2c1_a_pins[] = {
 	/* SDA, SCL */
···
 	SH_PFC_PIN_GROUP(drif3_ctrl_b),
 	SH_PFC_PIN_GROUP(drif3_data0_b),
 	SH_PFC_PIN_GROUP(drif3_data1_b),
+	SH_PFC_PIN_GROUP(du_rgb666),
+	SH_PFC_PIN_GROUP(du_rgb888),
+	SH_PFC_PIN_GROUP(du_clk_out_0),
+	SH_PFC_PIN_GROUP(du_clk_out_1),
+	SH_PFC_PIN_GROUP(du_sync),
+	SH_PFC_PIN_GROUP(du_oddf),
+	SH_PFC_PIN_GROUP(du_cde),
+	SH_PFC_PIN_GROUP(du_disp),
 	SH_PFC_PIN_GROUP(i2c1_a),
 	SH_PFC_PIN_GROUP(i2c1_b),
 	SH_PFC_PIN_GROUP(i2c2_a),
···
 	"drif3_data1_b",
 };
 
+static const char * const du_groups[] = {
+	"du_rgb666",
+	"du_rgb888",
+	"du_clk_out_0",
+	"du_clk_out_1",
+	"du_sync",
+	"du_oddf",
+	"du_cde",
+	"du_disp",
+};
+
 static const char * const i2c1_groups[] = {
 	"i2c1_a",
 	"i2c1_b",
···
 	SH_PFC_FUNCTION(drif1),
 	SH_PFC_FUNCTION(drif2),
 	SH_PFC_FUNCTION(drif3),
+	SH_PFC_FUNCTION(du),
 	SH_PFC_FUNCTION(i2c1),
 	SH_PFC_FUNCTION(i2c2),
 	SH_PFC_FUNCTION(i2c6),