1*e1ccb2c3SMarek Vasut /* SPDX-License-Identifier: GPL-2.0 */ 28946034aSSimon Glass /* 38946034aSSimon Glass * This header provides constants for most GPIO bindings. 48946034aSSimon Glass * 58946034aSSimon Glass * Most GPIO bindings include a flags cell as part of the GPIO specifier. 68946034aSSimon Glass * In most cases, the format of the flags cell uses the standard values 78946034aSSimon Glass * defined in this header. 88946034aSSimon Glass */ 98946034aSSimon Glass 108946034aSSimon Glass #ifndef _DT_BINDINGS_GPIO_GPIO_H 118946034aSSimon Glass #define _DT_BINDINGS_GPIO_GPIO_H 128946034aSSimon Glass 13*e1ccb2c3SMarek Vasut /* Bit 0 express polarity */ 148946034aSSimon Glass #define GPIO_ACTIVE_HIGH 0 158946034aSSimon Glass #define GPIO_ACTIVE_LOW 1 168946034aSSimon Glass 17*e1ccb2c3SMarek Vasut /* Bit 1 express single-endedness */ 18*e1ccb2c3SMarek Vasut #define GPIO_PUSH_PULL 0 19*e1ccb2c3SMarek Vasut #define GPIO_SINGLE_ENDED 2 20*e1ccb2c3SMarek Vasut 21*e1ccb2c3SMarek Vasut /* Bit 2 express Open drain or open source */ 22*e1ccb2c3SMarek Vasut #define GPIO_LINE_OPEN_SOURCE 0 23*e1ccb2c3SMarek Vasut #define GPIO_LINE_OPEN_DRAIN 4 24*e1ccb2c3SMarek Vasut 25*e1ccb2c3SMarek Vasut /* 26*e1ccb2c3SMarek Vasut * Open Drain/Collector is the combination of single-ended open drain interface. 27*e1ccb2c3SMarek Vasut * Open Source/Emitter is the combination of single-ended open source interface. 28*e1ccb2c3SMarek Vasut */ 29*e1ccb2c3SMarek Vasut #define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_DRAIN) 30*e1ccb2c3SMarek Vasut #define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_SOURCE) 31*e1ccb2c3SMarek Vasut 32*e1ccb2c3SMarek Vasut /* Bit 3 express GPIO suspend/resume and reset persistence */ 33*e1ccb2c3SMarek Vasut #define GPIO_PERSISTENT 0 34*e1ccb2c3SMarek Vasut #define GPIO_TRANSITORY 8 35*e1ccb2c3SMarek Vasut 368946034aSSimon Glass #endif 37