Commit 196270c5 authored by Niyas Sait's avatar Niyas Sait Committed by Linus Walleij
Browse files

pinconf-generic: clarify pull up and pull down config values 



PIN_CONFIG_BIAS_PULL_DOWN and PIN_CONFIG_BIAS_PULL_UP values can
be custom or an SI unit such as ohms

Signed-off-by: default avatarNiyas Sait <niyas.sait@linaro.org>
Link: https://lore.kernel.org/r/20221115175415.650690-3-niyas.sait@linaro.org


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 457ff9fb

include/linux/pinctrl/pinconf-generic.h

+4 −2
Original line number Diff line number Diff line
@@ -38,7 +38,8 @@ struct pinctrl_map; 
 *	impedance.

 * @PIN_CONFIG_BIAS_PULL_DOWN: the pin will be pulled down (usually with high

 *	impedance to GROUND). If the argument is != 0 pull-down is enabled,

 *	if it is 0, pull-down is total, i.e. the pin is connected to GROUND.

 *	the value is interpreted by the driver and can be custom or an SI unit

 *  such as ohms.

 * @PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: the pin will be pulled up or down based

 *	on embedded knowledge of the controller hardware, like current mux

 *	function. The pull direction and possibly strength too will normally
@@ -49,7 +50,8 @@ struct pinctrl_map; 
 *	@PIN_CONFIG_BIAS_DISABLE.

 * @PIN_CONFIG_BIAS_PULL_UP: the pin will be pulled up (usually with high

 *	impedance to VDD). If the argument is != 0 pull-up is enabled,

 *	if it is 0, pull-up is total, i.e. the pin is connected to VDD.

 *	the value is interpreted by the driver and can be custom or an SI unit

 *  such as ohms.

 * @PIN_CONFIG_DRIVE_OPEN_DRAIN: the pin will be driven with open drain (open

 *	collector) which means it is usually wired with other output ports

 *	which are then pulled up with an external resistor. Setting this