linux/pinctrl/pinconf-generic.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
5  * Copyright (C) 2011 ST-Ericsson SA
6  * Written on behalf of Linaro for ST-Ericsson
24  * enum pin_config_param - possible pin configuration parameters
31  *	transition from say pull-up to pull-down implies that you disable
32  *	pull-up in the process, this setting disables all biasing.
33  * @PIN_CONFIG_BIAS_HIGH_IMPEDANCE: the pin will be set to a high impedance
34  *	mode, also know as "third-state" (tristate) or "high-Z" or "floating".
35  *	On output pins this effectively disconnects the pin, which is useful
38  *	impedance.
40  *	impedance to GROUND). If the argument is != 0 pull-down is enabled,
42  *  	such as Ohms.
52  *	impedance to VDD). If the argument is != 0 pull-up is enabled,
54  *	such as Ohms.
56  *	collector) which means it is usually wired with other output ports
64  *	active transistors on the output. Setting this config will enable
65  *	push-pull mode, the argument is ignored.
75  *	affect the pin's ability to drive output.  1 enables input, 0 disables
78  *	schmitt-trigger mode. If the schmitt-trigger has adjustable hysteresis,
81  * @PIN_CONFIG_INPUT_SCHMITT_ENABLE: control schmitt-trigger mode on the pin.
82  *      If the argument != 0, schmitt-trigger mode is enabled. If it's 0,
83  *      schmitt-trigger mode is disabled.
85  *	schmitt-trigger mode. The argument is in uV.
91  * @PIN_CONFIG_OUTPUT: this will configure the pin as an output and drive a
93  *	indicate low level. (Please see Documentation/driver-api/pin-control.rst,
95  * @PIN_CONFIG_OUTPUT_ENABLE: this will enable the pin's output mode
97  * 	enable the output buffers and then let the pin controller current
99  * 	the line. Use argument 1 to enable output mode, argument 0 to disable
101  * @PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS: this will configure the output impedance
102  * 	of the pin with the value passed as argument. The argument is in ohms.