1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/pinctrl/mediatek,mt8183-pinctrl.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: MediaTek MT8183 Pin Controller 8 9maintainers: 10 - Sean Wang <sean.wang@kernel.org> 11 12description: 13 The MediaTek's MT8183 Pin controller is used to control SoC pins. 14 15properties: 16 compatible: 17 const: mediatek,mt8183-pinctrl 18 19 reg: 20 minItems: 10 21 maxItems: 10 22 23 reg-names: 24 items: 25 - const: iocfg0 26 - const: iocfg1 27 - const: iocfg2 28 - const: iocfg3 29 - const: iocfg4 30 - const: iocfg5 31 - const: iocfg6 32 - const: iocfg7 33 - const: iocfg8 34 - const: eint 35 36 gpio-controller: true 37 38 "#gpio-cells": 39 const: 2 40 description: 41 Number of cells in GPIO specifier. Since the generic GPIO binding is used, 42 the amount of cells must be specified as 2. See the below mentioned gpio 43 binding representation for description of particular cells. 44 45 gpio-ranges: 46 minItems: 1 47 maxItems: 5 48 description: 49 GPIO valid number range. 50 51 interrupt-controller: true 52 53 interrupts: 54 maxItems: 1 55 56 "#interrupt-cells": 57 const: 2 58 59allOf: 60 - $ref: pinctrl.yaml# 61 62required: 63 - compatible 64 - reg 65 - gpio-controller 66 - "#gpio-cells" 67 - gpio-ranges 68 69patternProperties: 70 '-pins(-[a-z]+)?$': 71 type: object 72 additionalProperties: false 73 patternProperties: 74 '^pins': 75 type: object 76 additionalProperties: false 77 description: 78 A pinctrl node should contain at least one subnodes representing the 79 pinctrl groups available on the machine. Each subnode will list the 80 pins it needs, and how they should be configured, with regard to muxer 81 configuration, pullups, drive strength, input enable/disable and input 82 schmitt. 83 $ref: /schemas/pinctrl/pincfg-node.yaml 84 85 properties: 86 pinmux: 87 description: 88 Integer array, represents gpio pin number and mux setting. 89 Supported pin number and mux varies for different SoCs, and are 90 defined as macros in <soc>-pinfunc.h directly. 91 92 bias-disable: true 93 94 bias-pull-up: true 95 96 bias-pull-down: true 97 98 input-enable: true 99 100 input-disable: true 101 102 output-low: true 103 104 output-high: true 105 106 input-schmitt-enable: true 107 108 input-schmitt-disable: true 109 110 drive-strength: 111 enum: [2, 4, 6, 8, 10, 12, 14, 16] 112 113 drive-strength-microamp: 114 enum: [125, 250, 500, 1000] 115 116 mediatek,drive-strength-adv: 117 deprecated: true 118 description: | 119 DEPRECATED: Please use drive-strength-microamp instead. 120 Describe the specific driving setup property. 121 For I2C pins, the existing generic driving setup can only support 122 2/4/6/8/10/12/14/16mA driving. But in specific driving setup, they 123 can support 0.125/0.25/0.5/1mA adjustment. If we enable specific 124 driving setup, the existing generic setup will be disabled. 125 The specific driving setup is controlled by E1E0EN. 126 When E1=0/E0=0, the strength is 0.125mA. 127 When E1=0/E0=1, the strength is 0.25mA. 128 When E1=1/E0=0, the strength is 0.5mA. 129 When E1=1/E0=1, the strength is 1mA. 130 EN is used to enable or disable the specific driving setup. 131 Valid arguments are described as below: 132 0: (E1, E0, EN) = (0, 0, 0) 133 1: (E1, E0, EN) = (0, 0, 1) 134 2: (E1, E0, EN) = (0, 1, 0) 135 3: (E1, E0, EN) = (0, 1, 1) 136 4: (E1, E0, EN) = (1, 0, 0) 137 5: (E1, E0, EN) = (1, 0, 1) 138 6: (E1, E0, EN) = (1, 1, 0) 139 7: (E1, E0, EN) = (1, 1, 1) 140 So the valid arguments are from 0 to 7. 141 $ref: /schemas/types.yaml#/definitions/uint32 142 enum: [0, 1, 2, 3, 4, 5, 6, 7] 143 144 mediatek,pull-up-adv: 145 description: | 146 Pull up settings for 2 pull resistors, R0 and R1. User can 147 configure those special pins. Valid arguments are described as 148 below: 149 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled. 150 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled. 151 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled. 152 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled. 153 $ref: /schemas/types.yaml#/definitions/uint32 154 enum: [0, 1, 2, 3] 155 156 mediatek,pull-down-adv: 157 description: | 158 Pull down settings for 2 pull resistors, R0 and R1. User can 159 configure those special pins. Valid arguments are described as 160 below: 161 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled. 162 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled. 163 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled. 164 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled. 165 $ref: /schemas/types.yaml#/definitions/uint32 166 enum: [0, 1, 2, 3] 167 168 mediatek,tdsel: 169 description: 170 An integer describing the steps for output level shifter duty 171 cycle when asserted (high pulse width adjustment). Valid arguments 172 are from 0 to 15. 173 $ref: /schemas/types.yaml#/definitions/uint32 174 175 mediatek,rdsel: 176 description: 177 An integer describing the steps for input level shifter duty cycle 178 when asserted (high pulse width adjustment). Valid arguments are 179 from 0 to 63. 180 $ref: /schemas/types.yaml#/definitions/uint32 181 182 required: 183 - pinmux 184 185additionalProperties: false 186 187examples: 188 - | 189 #include <dt-bindings/interrupt-controller/irq.h> 190 #include <dt-bindings/interrupt-controller/arm-gic.h> 191 #include <dt-bindings/pinctrl/mt8183-pinfunc.h> 192 193 soc { 194 #address-cells = <2>; 195 #size-cells = <2>; 196 197 pio: pinctrl@10005000 { 198 compatible = "mediatek,mt8183-pinctrl"; 199 reg = <0 0x10005000 0 0x1000>, 200 <0 0x11f20000 0 0x1000>, 201 <0 0x11e80000 0 0x1000>, 202 <0 0x11e70000 0 0x1000>, 203 <0 0x11e90000 0 0x1000>, 204 <0 0x11d30000 0 0x1000>, 205 <0 0x11d20000 0 0x1000>, 206 <0 0x11c50000 0 0x1000>, 207 <0 0x11f30000 0 0x1000>, 208 <0 0x1000b000 0 0x1000>; 209 reg-names = "iocfg0", "iocfg1", "iocfg2", 210 "iocfg3", "iocfg4", "iocfg5", 211 "iocfg6", "iocfg7", "iocfg8", 212 "eint"; 213 gpio-controller; 214 #gpio-cells = <2>; 215 gpio-ranges = <&pio 0 0 192>; 216 interrupt-controller; 217 interrupts = <GIC_SPI 177 IRQ_TYPE_LEVEL_HIGH>; 218 #interrupt-cells = <2>; 219 220 i2c0_pins_a: i2c0-pins { 221 pins1 { 222 pinmux = <PINMUX_GPIO48__FUNC_SCL5>, 223 <PINMUX_GPIO49__FUNC_SDA5>; 224 mediatek,pull-up-adv = <3>; 225 drive-strength-microamp = <1000>; 226 }; 227 }; 228 229 i2c1_pins_a: i2c1-pins { 230 pins { 231 pinmux = <PINMUX_GPIO50__FUNC_SCL3>, 232 <PINMUX_GPIO51__FUNC_SDA3>; 233 mediatek,pull-down-adv = <2>; 234 }; 235 }; 236 }; 237 }; 238