pinctrl: aspeed-g6: Add NCSI pin group config

Based on the NCSI pin table (Table 181) in NCSI spec[1], the reference
clock output pin (RMIIXRCLKO) is not needed on the management controller
side.

To optimize pin usage, add new NCSI pin group that excludes RMIIXRCLKO,
reducing the number of required pins.

LINK: [1] https://www.dmtf.org/sites/default/files/standards/documents/DSP0222_1.2.0a.pdf

Signed-off-by: Potin Lai <[email protected]>
Reviewed-by: Andrew Jeffery <[email protected]>
Link: https://lore.kernel.org/[email protected]
Signed-off-by: Linus Walleij <[email protected]>

Author: potinlai

drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c

@@ -249,7 +249,9 @@ PIN_DECL_2(E26, GPIOD3, RGMII3RXD3, RMII3RXER);
 
 FUNC_GROUP_DECL(RGMII3, H24, J22, H22, H23, G22, F22, G23, G24, F23, F26, F25,
 		E26);
-FUNC_GROUP_DECL(RMII3, H24, J22, H22, H23, G23, F23, F26, F25, E26);
+GROUP_DECL(RMII3, H24, J22, H22, H23, G23, F23, F26, F25, E26);
+GROUP_DECL(NCSI3, J22, H22, H23, G23, F23, F26, F25, E26);
+FUNC_DECL_2(RMII3, RMII3, NCSI3);
 
 #define F24 28
 SIG_EXPR_LIST_DECL_SESG(F24, NCTS3, NCTS3, SIG_DESC_SET(SCU410, 28));
@@ -355,7 +357,9 @@ FUNC_GROUP_DECL(NRTS4, B24);
 
 FUNC_GROUP_DECL(RGMII4, F24, E23, E24, E25, D26, D24, C25, C26, C24, B26, B25,
 		B24);
-FUNC_GROUP_DECL(RMII4, F24, E23, E24, E25, C25, C24, B26, B25, B24);
+GROUP_DECL(RMII4, F24, E23, E24, E25, C25, C24, B26, B25, B24);
+GROUP_DECL(NCSI4, E23, E24, E25, C25, C24, B26, B25, B24);
+FUNC_DECL_2(RMII4, RMII4, NCSI4);
 
 #define D22 40
 SIG_EXPR_LIST_DECL_SESG(D22, SD1CLK, SD1, SIG_DESC_SET(SCU414, 8));
@@ -1977,6 +1981,8 @@ static const struct aspeed_pin_group aspeed_g6_groups[] = {
 	ASPEED_PINCTRL_GROUP(MDIO2),
 	ASPEED_PINCTRL_GROUP(MDIO3),
 	ASPEED_PINCTRL_GROUP(MDIO4),
+	ASPEED_PINCTRL_GROUP(NCSI3),
+	ASPEED_PINCTRL_GROUP(NCSI4),
 	ASPEED_PINCTRL_GROUP(NCTS1),
 	ASPEED_PINCTRL_GROUP(NCTS2),
 	ASPEED_PINCTRL_GROUP(NCTS3),