1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * This header provides constants for most GPIO bindings. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Most GPIO bindings include a flags cell as part of the GPIO specifier. 6*4882a593Smuzhiyun * In most cases, the format of the flags cell uses the standard values 7*4882a593Smuzhiyun * defined in this header. 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #ifndef _DT_BINDINGS_GPIO_GPIO_H 11*4882a593Smuzhiyun #define _DT_BINDINGS_GPIO_GPIO_H 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun /* Bit 0 express polarity */ 14*4882a593Smuzhiyun #define GPIO_ACTIVE_HIGH 0 15*4882a593Smuzhiyun #define GPIO_ACTIVE_LOW 1 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* Bit 1 express single-endedness */ 18*4882a593Smuzhiyun #define GPIO_PUSH_PULL 0 19*4882a593Smuzhiyun #define GPIO_SINGLE_ENDED 2 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* Bit 2 express Open drain or open source */ 22*4882a593Smuzhiyun #define GPIO_LINE_OPEN_SOURCE 0 23*4882a593Smuzhiyun #define GPIO_LINE_OPEN_DRAIN 4 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun /* 26*4882a593Smuzhiyun * Open Drain/Collector is the combination of single-ended open drain interface. 27*4882a593Smuzhiyun * Open Source/Emitter is the combination of single-ended open source interface. 28*4882a593Smuzhiyun */ 29*4882a593Smuzhiyun #define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_DRAIN) 30*4882a593Smuzhiyun #define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_SOURCE) 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun /* Bit 3 express GPIO suspend/resume and reset persistence */ 33*4882a593Smuzhiyun #define GPIO_PERSISTENT 0 34*4882a593Smuzhiyun #define GPIO_TRANSITORY 8 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun /* Bit 4 express pull up */ 37*4882a593Smuzhiyun #define GPIO_PULL_UP 16 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun /* Bit 5 express pull down */ 40*4882a593Smuzhiyun #define GPIO_PULL_DOWN 32 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #endif 43