1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/pinctrl/pinctrl-mt8195.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Mediatek MT8195 Pin Controller 8 9maintainers: 10 - Sean Wang <sean.wang@mediatek.com> 11 12description: | 13 The Mediatek's Pin controller is used to control SoC pins. 14 15properties: 16 compatible: 17 const: mediatek,mt8195-pinctrl 18 19 gpio-controller: true 20 21 '#gpio-cells': 22 description: | 23 Number of cells in GPIO specifier. Since the generic GPIO binding is used, 24 the amount of cells must be specified as 2. See the below 25 mentioned gpio binding representation for description of particular cells. 26 const: 2 27 28 gpio-ranges: 29 description: gpio valid number range. 30 maxItems: 1 31 32 gpio-line-names: true 33 34 reg: 35 description: | 36 Physical address base for gpio base registers. There are 8 GPIO 37 physical address base in mt8195. 38 maxItems: 8 39 40 reg-names: 41 description: | 42 Gpio base register names. 43 maxItems: 8 44 45 interrupt-controller: true 46 47 '#interrupt-cells': 48 const: 2 49 50 interrupts: 51 description: The interrupt outputs to sysirq. 52 maxItems: 1 53 54 mediatek,rsel-resistance-in-si-unit: 55 type: boolean 56 description: | 57 Identifying i2c pins pull up/down type which is RSEL. It can support 58 RSEL define or si unit value(ohm) to set different resistance. 59 60# PIN CONFIGURATION NODES 61patternProperties: 62 '-pins$': 63 type: object 64 additionalProperties: false 65 patternProperties: 66 '^pins': 67 type: object 68 additionalProperties: false 69 description: | 70 A pinctrl node should contain at least one subnodes representing the 71 pinctrl groups available on the machine. Each subnode will list the 72 pins it needs, and how they should be configured, with regard to muxer 73 configuration, pullups, drive strength, input enable/disable and 74 input schmitt. 75 An example of using macro: 76 pincontroller { 77 /* GPIO0 set as multifunction GPIO0 */ 78 gpio-pins { 79 pins { 80 pinmux = <PINMUX_GPIO0__FUNC_GPIO0>; 81 } 82 }; 83 /* GPIO8 set as multifunction SDA0 */ 84 i2c0-pins { 85 pins { 86 pinmux = <PINMUX_GPIO8__FUNC_SDA0>; 87 } 88 }; 89 }; 90 $ref: "pinmux-node.yaml" 91 92 properties: 93 pinmux: 94 description: | 95 Integer array, represents gpio pin number and mux setting. 96 Supported pin number and mux varies for different SoCs, and are 97 defined as macros in dt-bindings/pinctrl/<soc>-pinfunc.h 98 directly. 99 100 drive-strength: 101 enum: [2, 4, 6, 8, 10, 12, 14, 16] 102 103 drive-strength-microamp: 104 enum: [125, 250, 500, 1000] 105 106 bias-pull-down: 107 oneOf: 108 - type: boolean 109 - enum: [100, 101, 102, 103] 110 description: mt8195 pull down PUPD/R0/R1 type define value. 111 - enum: [200, 201, 202, 203, 204, 205, 206, 207] 112 description: mt8195 pull down RSEL type define value. 113 - enum: [75000, 5000] 114 description: mt8195 pull down RSEL type si unit value(ohm). 115 description: | 116 For pull down type is normal, it don't need add RSEL & R1R0 define 117 and resistance value. 118 For pull down type is PUPD/R0/R1 type, it can add R1R0 define to 119 set different resistance. It can support "MTK_PUPD_SET_R1R0_00" & 120 "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & 121 "MTK_PUPD_SET_R1R0_11" define in mt8195. 122 For pull down type is RSEL, it can add RSEL define & resistance 123 value(ohm) to set different resistance by identifying property 124 "mediatek,rsel-resistance-in-si-unit". 125 It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001" 126 & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" 127 & "MTK_PULL_SET_RSEL_100" & "MTK_PULL_SET_RSEL_101" 128 & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111" 129 define in mt8195. It can also support resistance value(ohm) 130 "75000" & "5000" in mt8195. 131 132 An example of using RSEL define: 133 pincontroller { 134 i2c0_pin { 135 pins { 136 pinmux = <PINMUX_GPIO8__FUNC_SDA0>; 137 bias-pull-down = <MTK_PULL_SET_RSEL_001>; 138 } 139 }; 140 }; 141 An example of using si unit resistance value(ohm): 142 &pio { 143 mediatek,rsel-resistance-in-si-unit; 144 } 145 pincontroller { 146 i2c0_pin { 147 pins { 148 pinmux = <PINMUX_GPIO8__FUNC_SDA0>; 149 bias-pull-down = <75000>; 150 } 151 }; 152 }; 153 154 bias-pull-up: 155 oneOf: 156 - type: boolean 157 - enum: [100, 101, 102, 103] 158 description: mt8195 pull up PUPD/R0/R1 type define value. 159 - enum: [200, 201, 202, 203, 204, 205, 206, 207] 160 description: mt8195 pull up RSEL type define value. 161 - enum: [1000, 1500, 2000, 3000, 4000, 5000, 10000, 75000] 162 description: mt8195 pull up RSEL type si unit value(ohm). 163 description: | 164 For pull up type is normal, it don't need add RSEL & R1R0 define 165 and resistance value. 166 For pull up type is PUPD/R0/R1 type, it can add R1R0 define to 167 set different resistance. It can support "MTK_PUPD_SET_R1R0_00" & 168 "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & 169 "MTK_PUPD_SET_R1R0_11" define in mt8195. 170 For pull up type is RSEL, it can add RSEL define & resistance 171 value(ohm) to set different resistance by identifying property 172 "mediatek,rsel-resistance-in-si-unit". 173 It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001" 174 & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" 175 & "MTK_PULL_SET_RSEL_100" & "MTK_PULL_SET_RSEL_101" 176 & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111" 177 define in mt8195. It can also support resistance value(ohm) 178 "1000" & "1500" & "2000" & "3000" & "4000" & "5000" & "10000" & 179 "75000" in mt8195. 180 An example of using RSEL define: 181 pincontroller { 182 i2c0-pins { 183 pins { 184 pinmux = <PINMUX_GPIO8__FUNC_SDA0>; 185 bias-pull-up = <MTK_PULL_SET_RSEL_001>; 186 } 187 }; 188 }; 189 An example of using si unit resistance value(ohm): 190 &pio { 191 mediatek,rsel-resistance-in-si-unit; 192 } 193 pincontroller { 194 i2c0-pins { 195 pins { 196 pinmux = <PINMUX_GPIO8__FUNC_SDA0>; 197 bias-pull-up = <1000>; 198 } 199 }; 200 }; 201 202 bias-disable: true 203 204 output-high: true 205 206 output-low: true 207 208 input-enable: true 209 210 input-disable: true 211 212 input-schmitt-enable: true 213 214 input-schmitt-disable: true 215 216 required: 217 - pinmux 218 219allOf: 220 - $ref: "pinctrl.yaml#" 221 222required: 223 - compatible 224 - reg 225 - interrupts 226 - interrupt-controller 227 - '#interrupt-cells' 228 - gpio-controller 229 - '#gpio-cells' 230 - gpio-ranges 231 232additionalProperties: false 233 234examples: 235 - | 236 #include <dt-bindings/pinctrl/mt8195-pinfunc.h> 237 #include <dt-bindings/interrupt-controller/arm-gic.h> 238 # 239 pio: pinctrl@10005000 { 240 compatible = "mediatek,mt8195-pinctrl"; 241 reg = <0x10005000 0x1000>, 242 <0x11d10000 0x1000>, 243 <0x11d30000 0x1000>, 244 <0x11d40000 0x1000>, 245 <0x11e20000 0x1000>, 246 <0x11eb0000 0x1000>, 247 <0x11f40000 0x1000>, 248 <0x1000b000 0x1000>; 249 reg-names = "iocfg0", "iocfg_bm", "iocfg_bl", 250 "iocfg_br", "iocfg_lm", "iocfg_rb", 251 "iocfg_tl", "eint"; 252 gpio-controller; 253 #gpio-cells = <2>; 254 gpio-ranges = <&pio 0 0 144>; 255 interrupt-controller; 256 interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH 0>; 257 #interrupt-cells = <2>; 258 259 pio-pins { 260 pins { 261 pinmux = <PINMUX_GPIO0__FUNC_GPIO0>; 262 output-low; 263 }; 264 }; 265 266 spi0-pins { 267 pins-spi { 268 pinmux = <PINMUX_GPIO132__FUNC_SPIM0_CSB>, 269 <PINMUX_GPIO134__FUNC_SPIM0_MO>, 270 <PINMUX_GPIO133__FUNC_SPIM0_CLK>; 271 bias-disable; 272 }; 273 pins-spi-mi { 274 pinmux = <PINMUX_GPIO135__FUNC_SPIM0_MI>; 275 bias-pull-down; 276 }; 277 }; 278 279 i2c0-pins { 280 pins { 281 pinmux = <PINMUX_GPIO8__FUNC_SDA0>, 282 <PINMUX_GPIO9__FUNC_SCL0>; 283 bias-disable; 284 drive-strength-microamp = <1000>; 285 }; 286 }; 287 }; 288