diff options
Diffstat (limited to 'include/linux/pinctrl/pinconf-generic.h')
| -rw-r--r-- | include/linux/pinctrl/pinconf-generic.h | 69 |
1 files changed, 68 insertions, 1 deletions
diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h index 6aa238096622..201e68de2d11 100644 --- a/include/linux/pinctrl/pinconf-generic.h +++ b/include/linux/pinctrl/pinconf-generic.h @@ -29,12 +29,21 @@ * if for example some other pin is going to drive the signal connected * to it for a while. Pins used for input are usually always high * impedance. + * @PIN_CONFIG_BIAS_BUS_HOLD: the pin will be set to weakly latch so that it + * weakly drives the last value on a tristate bus, also known as a "bus + * holder", "bus keeper" or "repeater". This allows another device on the + * bus to change the value by driving the bus high or low and switching to + * tristate. The argument is ignored. * @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 disabled. * @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 disabled. + * @PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: the pin will be pulled up or down based + * on embedded knowledge of the controller, like current mux function. + * If the argument is != 0 pull up/down is enabled, if it is 0, + * the pull is disabled. * @PIN_CONFIG_DRIVE_PUSH_PULL: the pin will be driven actively high and * low, this is the most typical case and is typically achieved with two * active transistors on the output. Setting this config will enable @@ -48,6 +57,9 @@ * argument is ignored. * @PIN_CONFIG_DRIVE_STRENGTH: the pin will sink or source at most the current * passed as argument. The argument is in mA. + * @PIN_CONFIG_INPUT_ENABLE: enable the pin's input. Note that this does not + * affect the pin's ability to drive output. 1 enables input, 0 disables + * input. * @PIN_CONFIG_INPUT_SCHMITT_ENABLE: control schmitt-trigger mode on the pin. * If the argument != 0, schmitt-trigger mode is enabled. If it's 0, * schmitt-trigger mode is disabled. @@ -57,7 +69,7 @@ * setting pins to this mode. * @PIN_CONFIG_INPUT_DEBOUNCE: this will configure the pin to debounce mode, * which means it will wait for signals to settle when reading inputs. The - * argument gives the debounce time on a custom format. Setting the + * argument gives the debounce time in usecs. Setting the * argument to zero turns debouncing off. * @PIN_CONFIG_POWER_SOURCE: if the pin can select between different power * supplies, the argument to this parameter (on a custom format) tells @@ -78,12 +90,15 @@ enum pin_config_param { PIN_CONFIG_BIAS_DISABLE, PIN_CONFIG_BIAS_HIGH_IMPEDANCE, + PIN_CONFIG_BIAS_BUS_HOLD, PIN_CONFIG_BIAS_PULL_UP, PIN_CONFIG_BIAS_PULL_DOWN, + PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, PIN_CONFIG_DRIVE_PUSH_PULL, PIN_CONFIG_DRIVE_OPEN_DRAIN, PIN_CONFIG_DRIVE_OPEN_SOURCE, PIN_CONFIG_DRIVE_STRENGTH, + PIN_CONFIG_INPUT_ENABLE, PIN_CONFIG_INPUT_SCHMITT_ENABLE, PIN_CONFIG_INPUT_SCHMITT, PIN_CONFIG_INPUT_DEBOUNCE, @@ -122,6 +137,58 @@ static inline unsigned long pinconf_to_config_packed(enum pin_config_param param return PIN_CONF_PACKED(param, argument); } +#ifdef CONFIG_OF + +#include <linux/device.h> +#include <linux/pinctrl/machine.h> +struct pinctrl_dev; +struct pinctrl_map; + +int pinconf_generic_dt_subnode_to_map_new(struct pinctrl_dev *pctldev, + struct device_node *np, struct pinctrl_map **map, + unsigned *reserved_maps, unsigned *num_maps, + enum pinctrl_map_type type); +int pinconf_generic_dt_node_to_map_new(struct pinctrl_dev *pctldev, + struct device_node *np_config, struct pinctrl_map **map, + unsigned *num_maps, enum pinctrl_map_type type); + +static inline int pinconf_generic_dt_node_to_map_group( + struct pinctrl_dev *pctldev, struct device_node *np_config, + struct pinctrl_map **map, unsigned *num_maps) +{ + return pinconf_generic_dt_node_to_map_new(pctldev, np_config, map, num_maps, + PIN_MAP_TYPE_CONFIGS_GROUP); +} + +static inline int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev *pctldev, + struct device_node *np, struct pinctrl_map **map, + unsigned *reserved_maps, unsigned *num_maps) +{ + return pinconf_generic_dt_subnode_to_map_new(pctldev, np, map, + reserved_maps, num_maps, + PIN_MAP_TYPE_CONFIGS_PIN); +} + +static inline int pinconf_generic_dt_node_to_map(struct pinctrl_dev *pctldev, + struct device_node *np_config, struct pinctrl_map **map, + unsigned *num_maps) +{ + return pinconf_generic_dt_node_to_map_new(pctldev, np_config, + map, num_maps, + PIN_MAP_TYPE_CONFIGS_PIN); +} + + +static inline int pinconf_generic_dt_node_to_map_pin( + struct pinctrl_dev *pctldev, struct device_node *np_config, + struct pinctrl_map **map, unsigned *num_maps) +{ + return pinconf_generic_dt_node_to_map_new(pctldev, np_config, map, num_maps, + PIN_MAP_TYPE_CONFIGS_PIN); +} + +#endif + #endif /* CONFIG_GENERIC_PINCONF */ #endif /* __LINUX_PINCTRL_PINCONF_GENERIC_H */ |