diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c b/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c
index cf3106cec048..df56e58b05c1 100644
--- a/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c
+++ b/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c
@@ -1006,15 +1006,23 @@ SS_PIN_DECL(H3, GPIOQ5, SDA14);
 
 FUNC_GROUP_DECL(I2C14, H4, H3);
 
-#define DASH9028_DESC	SIG_DESC_SET(SCU90, 28)
+/*
+ * There are several opportunities to document USB port 4 in the datasheet, but
+ * it is only mentioned in one location. Particularly, the Multi-function Pins
+ * Mapping and Control table in the datasheet elides the signal names,
+ * suggesting that port 4 may not actually be functional. As such we define the
+ * signal names and control bit, but don't export the capability's function or
+ * group.
+ */
+#define USB11H3_DESC	SIG_DESC_SET(SCU90, 28)
 
 #define H2 134
-SIG_EXPR_LIST_DECL_SINGLE(DASHH2, DASHH2, DASH9028_DESC);
-SS_PIN_DECL(H2, GPIOQ6, DASHH2);
+SIG_EXPR_LIST_DECL_SINGLE(USB11HDP3, USB11H3, USB11H3_DESC);
+SS_PIN_DECL(H2, GPIOQ6, USB11HDP3);
 
 #define H1 135
-SIG_EXPR_LIST_DECL_SINGLE(DASHH1, DASHH1, DASH9028_DESC);
-SS_PIN_DECL(H1, GPIOQ7, DASHH1);
+SIG_EXPR_LIST_DECL_SINGLE(USB11HDN3, USB11H3, USB11H3_DESC);
+SS_PIN_DECL(H1, GPIOQ7, USB11HDN3);
 
 #define V20 136
 SSSF_PIN_DECL(V20, GPIOR0, ROMCS1, SIG_DESC_SET(SCU88, 24));
@@ -1706,10 +1714,42 @@ FUNC_GROUP_DECL(VPO12, U21, T19, V22, U20, R22, P18, P19, P20, P21, P22, M19,
 FUNC_GROUP_DECL(VPO24, U21, T19, V22, U20, L22, K18, V21, W22, R22, P18, P19,
 		P20, P21, P22, M19, M20, M21, M22, L18, L19);
 
+#define USB11H2_DESC	SIG_DESC_SET(SCU90, 3)
+#define USB11D1_DESC	SIG_DESC_BIT(SCU90, 3, 0)
+
+#define K4 220
+SIG_EXPR_LIST_DECL_SINGLE(USB11HDP2, USB11H2, USB11H2_DESC);
+SIG_EXPR_LIST_DECL_SINGLE(USB11DP1, USB11D1, USB11D1_DESC);
+MS_PIN_DECL_(K4, SIG_EXPR_LIST_PTR(USB11HDP2), SIG_EXPR_LIST_PTR(USB11DP1));
+
+#define K3 221
+SIG_EXPR_LIST_DECL_SINGLE(USB11HDN1, USB11H2, USB11H2_DESC);
+SIG_EXPR_LIST_DECL_SINGLE(USB11DDN1, USB11D1, USB11D1_DESC);
+MS_PIN_DECL_(K3, SIG_EXPR_LIST_PTR(USB11HDN1), SIG_EXPR_LIST_PTR(USB11DDN1));
+
+FUNC_GROUP_DECL(USB11H2, K4, K3);
+FUNC_GROUP_DECL(USB11D1, K4, K3);
+
+#define USB2H1_DESC	SIG_DESC_SET(SCU90, 29)
+#define USB2D1_DESC	SIG_DESC_BIT(SCU90, 29, 0)
+
+#define AB21 222
+SIG_EXPR_LIST_DECL_SINGLE(USB2HDP1, USB2H1, USB2H1_DESC);
+SIG_EXPR_LIST_DECL_SINGLE(USB2DDP1, USB2D1, USB2D1_DESC);
+MS_PIN_DECL_(AB21, SIG_EXPR_LIST_PTR(USB2HDP1), SIG_EXPR_LIST_PTR(USB2DDP1));
+
+#define AB20 223
+SIG_EXPR_LIST_DECL_SINGLE(USB2HDN1, USB2H1, USB2H1_DESC);
+SIG_EXPR_LIST_DECL_SINGLE(USB2DDN1, USB2D1, USB2D1_DESC);
+MS_PIN_DECL_(AB20, SIG_EXPR_LIST_PTR(USB2HDN1), SIG_EXPR_LIST_PTR(USB2DDN1));
+
+FUNC_GROUP_DECL(USB2H1, AB21, AB20);
+FUNC_GROUP_DECL(USB2D1, AB21, AB20);
+
 /* Note we account for GPIOY4-GPIOY7 even though they're not valid, thus 216
- * pins becomes 220.
+ * pins becomes 220. Four additional non-GPIO-capable pins are present for USB.
  */
-#define ASPEED_G4_NR_PINS 220
+#define ASPEED_G4_NR_PINS 224
 
 /* Pins, groups and functions are sort(1):ed alphabetically for sanity */
 
@@ -1749,6 +1789,8 @@ static struct pinctrl_pin_desc aspeed_g4_pins[ASPEED_G4_NR_PINS] = {
 	ASPEED_PINCTRL_PIN(AB5),
 	ASPEED_PINCTRL_PIN(AB6),
 	ASPEED_PINCTRL_PIN(AB7),
+	ASPEED_PINCTRL_PIN(AB20),
+	ASPEED_PINCTRL_PIN(AB21),
 	ASPEED_PINCTRL_PIN(B1),
 	ASPEED_PINCTRL_PIN(B10),
 	ASPEED_PINCTRL_PIN(B11),
@@ -1848,6 +1890,8 @@ static struct pinctrl_pin_desc aspeed_g4_pins[ASPEED_G4_NR_PINS] = {
 	ASPEED_PINCTRL_PIN(J5),
 	ASPEED_PINCTRL_PIN(K18),
 	ASPEED_PINCTRL_PIN(K20),
+	ASPEED_PINCTRL_PIN(K3),
+	ASPEED_PINCTRL_PIN(K4),
 	ASPEED_PINCTRL_PIN(K5),
 	ASPEED_PINCTRL_PIN(L1),
 	ASPEED_PINCTRL_PIN(L18),
@@ -2070,6 +2114,10 @@ static const struct aspeed_pin_group aspeed_g4_groups[] = {
 	ASPEED_PINCTRL_GROUP(TXD3),
 	ASPEED_PINCTRL_GROUP(TXD4),
 	ASPEED_PINCTRL_GROUP(UART6),
+	ASPEED_PINCTRL_GROUP(USB11D1),
+	ASPEED_PINCTRL_GROUP(USB11H2),
+	ASPEED_PINCTRL_GROUP(USB2D1),
+	ASPEED_PINCTRL_GROUP(USB2H1),
 	ASPEED_PINCTRL_GROUP(USBCKI),
 	ASPEED_PINCTRL_GROUP(VGABIOS_ROM),
 	ASPEED_PINCTRL_GROUP(VGAHS),
@@ -2221,6 +2269,10 @@ static const struct aspeed_pin_function aspeed_g4_functions[] = {
 	ASPEED_PINCTRL_FUNC(TXD3),
 	ASPEED_PINCTRL_FUNC(TXD4),
 	ASPEED_PINCTRL_FUNC(UART6),
+	ASPEED_PINCTRL_FUNC(USB11D1),
+	ASPEED_PINCTRL_FUNC(USB11H2),
+	ASPEED_PINCTRL_FUNC(USB2D1),
+	ASPEED_PINCTRL_FUNC(USB2H1),
 	ASPEED_PINCTRL_FUNC(USBCKI),
 	ASPEED_PINCTRL_FUNC(VGABIOS_ROM),
 	ASPEED_PINCTRL_FUNC(VGAHS),