From 8c58f1a7a4b6d1d723bf25fef9d842d5a11200d0 Mon Sep 17 00:00:00 2001 From: Jacopo Mondi Date: Wed, 5 Apr 2017 16:07:19 +0200 Subject: pinctrl: generic: Add bi-directional and output-enable Add bi-directional and output-enable pin configuration properties. bi-directional allows to specify when a pin shall operate in input and output mode at the same time. This is particularly useful in platforms where input and output buffers have to be manually enabled. output-enable is just syntactic sugar to specify that a pin shall operate in output mode, ignoring the provided argument. This pairs with input-enable pin configuration option. Signed-off-by: Jacopo Mondi Acked-by: Rob Herring Signed-off-by: Linus Walleij --- include/linux/pinctrl/pinconf-generic.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h index 7620eb127cff..279e3c5326e3 100644 --- a/include/linux/pinctrl/pinconf-generic.h +++ b/include/linux/pinctrl/pinconf-generic.h @@ -42,6 +42,8 @@ * @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. + * @PIN_CONFIG_BIDIRECTIONAL: the pin will be configured to allow simultaneous + * input and output operations. * @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 @@ -96,6 +98,7 @@ enum pin_config_param { PIN_CONFIG_BIAS_PULL_DOWN, PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, PIN_CONFIG_BIAS_PULL_UP, + PIN_CONFIG_BIDIRECTIONAL, PIN_CONFIG_DRIVE_OPEN_DRAIN, PIN_CONFIG_DRIVE_OPEN_SOURCE, PIN_CONFIG_DRIVE_PUSH_PULL, -- cgit v1.2.3