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diff --git a/Documentation/devicetree/bindings/pinctrl/aspeed,ast2600-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/aspeed,ast2600-pinctrl.yaml
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+# SPDX-License-Identifier: GPL-2.0+
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/aspeed,ast2600-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED AST2600 Pin Controller
+
+maintainers:
+  - Andrew Jeffery <andrew@aj.id.au>
+
+description: |+
+  The pin controller node should be the child of a syscon node with the
+  required property:
+
+  - compatible: Should be one of the following:
+                "aspeed,ast2600-scu", "syscon", "simple-mfd"
+
+  Refer to the the bindings described in
+  Documentation/devicetree/bindings/mfd/syscon.yaml
+
+properties:
+  compatible:
+    const: aspeed,ast2600-pinctrl
+
+patternProperties:
+  '^.*$':
+    if:
+      type: object
+    then:
+      properties:
+        function:
+          $ref: "/schemas/types.yaml#/definitions/string"
+          enum: [ ADC0, ADC1, ADC10, ADC11, ADC12, ADC13, ADC14, ADC15, ADC2,
+                  ADC3, ADC4, ADC5, ADC6, ADC7, ADC8, ADC9, BMCINT, EMMC, ESPI, ESPIALT,
+                  FSI1, FSI2, FWSPIABR, FWSPID, FWSPIWP, GPIT0, GPIT1, GPIT2, GPIT3,
+                  GPIT4, GPIT5, GPIT6, GPIT7, GPIU0, GPIU1, GPIU2, GPIU3, GPIU4, GPIU5,
+                  GPIU6, GPIU7, I2C1, I2C10, I2C11, I2C12, I2C13, I2C14, I2C15, I2C16,
+                  I2C2, I2C3, I2C4, I2C5, I2C6, I2C7, I2C8, I2C9, I3C3, I3C4, I3C5,
+                  I3C6, JTAGM, LHPD, LHSIRQ, LPC, LPCHC, LPCPD, LPCPME, LPCSMI, LSIRQ,
+                  MACLINK1, MACLINK2, MACLINK3, MACLINK4, MDIO1, MDIO2, MDIO3, MDIO4,
+                  NCTS1, NCTS2, NCTS3, NCTS4, NDCD1, NDCD2, NDCD3, NDCD4, NDSR1, NDSR2,
+                  NDSR3, NDSR4, NDTR1, NDTR2, NDTR3, NDTR4, NRI1, NRI2, NRI3, NRI4,
+                  NRTS1, NRTS2, NRTS3, NRTS4, OSCCLK, PEWAKE, PWM0, PWM1, PWM10, PWM11,
+                  PWM12, PWM13, PWM14, PWM15, PWM2, PWM3, PWM4, PWM5, PWM6, PWM7, PWM8,
+                  PWM9, RGMII1, RGMII2, RGMII3, RGMII4, RMII1, RMII2, RMII3, RMII4,
+                  RXD1, RXD2, RXD3, RXD4, SALT1, SALT10, SALT11, SALT12, SALT13, SALT14,
+                  SALT15, SALT16, SALT2, SALT3, SALT4, SALT5, SALT6, SALT7, SALT8,
+                  SALT9, SD1, SD2, SGPM1, SGPS1, SIOONCTRL, SIOPBI, SIOPBO, SIOPWREQ,
+                  SIOPWRGD, SIOS3, SIOS5, SIOSCI, SPI1, SPI1ABR, SPI1CS1, SPI1WP, SPI2,
+                  SPI2CS1, SPI2CS2, TACH0, TACH1, TACH10, TACH11, TACH12, TACH13, TACH14,
+                  TACH15, TACH2, TACH3, TACH4, TACH5, TACH6, TACH7, TACH8, TACH9, THRU0,
+                  THRU1, THRU2, THRU3, TXD1, TXD2, TXD3, TXD4, UART10, UART11, UART12,
+                  UART13, UART6, UART7, UART8, UART9, USBAD, USBADP, USB2AH, USB2AHP,
+                  USB2BD, USB2BH, VB, VGAHS, VGAVS, WDTRST1, WDTRST2, WDTRST3, WDTRST4 ]
+
+        groups:
+          $ref: "/schemas/types.yaml#/definitions/string"
+          enum: [ ADC0, ADC1, ADC10, ADC11, ADC12, ADC13, ADC14, ADC15, ADC2,
+                  ADC3, ADC4, ADC5, ADC6, ADC7, ADC8, ADC9, BMCINT, EMMCG1, EMMCG4,
+                  EMMCG8, ESPI, ESPIALT, FSI1, FSI2, FWSPIABR, FWSPID, FWSPIWP,
+                  GPIT0, GPIT1, GPIT2, GPIT3, GPIT4, GPIT5, GPIT6, GPIT7, GPIU0, GPIU1,
+                  GPIU2, GPIU3, GPIU4, GPIU5, GPIU6, GPIU7, HVI3C3, HVI3C4, I2C1, I2C10,
+                  I2C11, I2C12, I2C13, I2C14, I2C15, I2C16, I2C2, I2C3, I2C4, I2C5,
+                  I2C6, I2C7, I2C8, I2C9, I3C3, I3C4, I3C5, I3C6, JTAGM, LHPD, LHSIRQ,
+                  LPC, LPCHC, LPCPD, LPCPME, LPCSMI, LSIRQ, MACLINK1, MACLINK2, MACLINK3,
+                  MACLINK4, MDIO1, MDIO2, MDIO3, MDIO4, NCTS1, NCTS2, NCTS3, NCTS4,
+                  NDCD1, NDCD2, NDCD3, NDCD4, NDSR1, NDSR2, NDSR3, NDSR4, NDTR1, NDTR2,
+                  NDTR3, NDTR4, NRI1, NRI2, NRI3, NRI4, NRTS1, NRTS2, NRTS3, NRTS4,
+                  OSCCLK, PEWAKE, PWM0, PWM1, PWM10G0, PWM10G1, PWM11G0, PWM11G1, PWM12G0,
+                  PWM12G1, PWM13G0, PWM13G1, PWM14G0, PWM14G1, PWM15G0, PWM15G1, PWM2,
+                  PWM3, PWM4, PWM5, PWM6, PWM7, PWM8G0, PWM8G1, PWM9G0, PWM9G1, QSPI1,
+                  QSPI2, RGMII1, RGMII2, RGMII3, RGMII4, RMII1, RMII2, RMII3, RMII4,
+                  RXD1, RXD2, RXD3, RXD4, SALT1, SALT10G0, SALT10G1, SALT11G0, SALT11G1,
+                  SALT12G0, SALT12G1, SALT13G0, SALT13G1, SALT14G0, SALT14G1, SALT15G0,
+                  SALT15G1, SALT16G0, SALT16G1, SALT2, SALT3, SALT4, SALT5, SALT6,
+                  SALT7, SALT8, SALT9G0, SALT9G1, SD1, SD2, SD3, SGPM1, SGPS1, SIOONCTRL,
+                  SIOPBI, SIOPBO, SIOPWREQ, SIOPWRGD, SIOS3, SIOS5, SIOSCI, SPI1, SPI1ABR,
+                  SPI1CS1, SPI1WP, SPI2, SPI2CS1, SPI2CS2, TACH0, TACH1, TACH10, TACH11,
+                  TACH12, TACH13, TACH14, TACH15, TACH2, TACH3, TACH4, TACH5, TACH6,
+                  TACH7, TACH8, TACH9, THRU0, THRU1, THRU2, THRU3, TXD1, TXD2, TXD3,
+                  TXD4, UART10, UART11, UART12G0, UART12G1, UART13G0, UART13G1, UART6,
+                  UART7, UART8, UART9, USBA, USBB, VB, VGAHS, VGAVS, WDTRST1, WDTRST2,
+                  WDTRST3, WDTRST4]
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    syscon: scu@1e6e2000 {
+        compatible = "aspeed,ast2600-scu", "syscon", "simple-mfd";
+        reg = <0x1e6e2000 0xf6c>;
+
+        pinctrl: pinctrl {
+            compatible = "aspeed,g6-pinctrl";
+
+            pinctrl_pwm10g1_default: pwm10g1_default {
+                function = "PWM10";
+                groups = "PWM10G1";
+            };
+
+            pinctrl_gpioh0_unbiased_default: gpioh0 {
+                pins = "A18";
+                bias-disable;
+            };
+        };
+    };