bmips: Add gpio funcion to bcm63268 pinctl

Right now there's no way to know what state CFE will leave the pinctrl
registers in, so they should be explicitly set by linux on boot. This
patch adds a gpio configuration for drivers that need it, i.e. gpio-leds.

Signed-off-by: Kyle Hendry <kylehendrydev@gmail.com>

target/linux/bmips/patches-6.6/900-bcm63268-gpio-pinctrl.patch

@@ -0,0 +1,99 @@
+--- a/drivers/pinctrl/bcm/pinctrl-bcm63268.c
++++ b/drivers/pinctrl/bcm/pinctrl-bcm63268.c
+@@ -38,6 +38,7 @@ enum bcm63268_pinctrl_reg {
+ 	BCM63268_MODE,
+ 	BCM63268_CTRL,
+ 	BCM63268_BASEMODE,
++	BCM63268_NOREG,
+ };
+ 
+ struct bcm63268_function {
+@@ -242,6 +243,61 @@ static struct pingroup bcm63268_groups[]
+ 	BCM_PIN_GROUP(vdsl_phy3_grp),
+ };
+ 
++static const char * const gpio_groups[] = {
++	"gpio0",
++	"gpio1",
++	"gpio2",
++	"gpio3",
++	"gpio4",
++	"gpio5",
++	"gpio6",
++	"gpio7",
++	"gpio8",
++	"gpio9",
++	"gpio10",
++	"gpio11",
++	"gpio12",
++	"gpio13",
++	"gpio14",
++	"gpio15",
++	"gpio16",
++	"gpio17",
++	"gpio18",
++	"gpio19",
++	"gpio20",
++	"gpio21",
++	"gpio22",
++	"gpio23",
++	"gpio24",
++	"gpio25",
++	"gpio26",
++	"gpio27",
++	"gpio28",
++	"gpio29",
++	"gpio30",
++	"gpio31",
++	"gpio32",
++	"gpio33",
++	"gpio34",
++	"gpio35",
++	"gpio36",
++	"gpio37",
++	"gpio38",
++	"gpio39",
++	"gpio40",
++	"gpio41",
++	"gpio42",
++	"gpio43",
++	"gpio44",
++	"gpio45",
++	"gpio46",
++	"gpio47",
++	"gpio48",
++	"gpio49",
++	"gpio50",
++	"gpio51",
++};
++
+ static const char * const led_groups[] = {
+ 	"gpio0",
+ 	"gpio1",
+@@ -427,7 +483,16 @@ static const char * const vdsl_phy_overr
+ 		.mask = val,				\
+ 	}
+ 
++#define BCM63268_NOMODE_FUN(n)			\
++	{						\
++		.name = #n,				\
++		.groups = n##_groups,			\
++		.num_groups = ARRAY_SIZE(n##_groups),	\
++		.reg = BCM63268_NOREG,			\
++	}
++
+ static const struct bcm63268_function bcm63268_funcs[] = {
++	BCM63268_NOMODE_FUN(gpio),
+ 	BCM63268_LED_FUN(led),
+ 	BCM63268_MODE_FUN(serial_led_clk),
+ 	BCM63268_MODE_FUN(serial_led_data),
+@@ -562,6 +627,9 @@ static int bcm63268_pinctrl_set_mux(stru
+ 		mask = f->mask;
+ 		val = f->mask;
+ 		break;
++	case BCM63268_NOREG:
++		/*Do nothing, leave regs as default*/
++		break;
+ 	default:
+ 		WARN_ON(1);
+ 		return -EINVAL;