diff options
Diffstat (limited to 'include/linux/pinctrl')
| -rw-r--r-- | include/linux/pinctrl/devinfo.h | 10 | ||||
| -rw-r--r-- | include/linux/pinctrl/pinconf-generic.h | 64 | ||||
| -rw-r--r-- | include/linux/pinctrl/pinctrl-state.h | 8 |
3 files changed, 50 insertions, 32 deletions
diff --git a/include/linux/pinctrl/devinfo.h b/include/linux/pinctrl/devinfo.h index 281cb91ddcf5..05082e407c4a 100644 --- a/include/linux/pinctrl/devinfo.h +++ b/include/linux/pinctrl/devinfo.h @@ -24,10 +24,14 @@ * struct dev_pin_info - pin state container for devices * @p: pinctrl handle for the containing device * @default_state: the default state for the handle, if found + * @init_state: the state at probe time, if found + * @sleep_state: the state at suspend time, if found + * @idle_state: the state at idle (runtime suspend) time, if found */ struct dev_pin_info { struct pinctrl *p; struct pinctrl_state *default_state; + struct pinctrl_state *init_state; #ifdef CONFIG_PM struct pinctrl_state *sleep_state; struct pinctrl_state *idle_state; @@ -35,6 +39,7 @@ struct dev_pin_info { }; extern int pinctrl_bind_pins(struct device *dev); +extern int pinctrl_init_done(struct device *dev); #else @@ -45,5 +50,10 @@ static inline int pinctrl_bind_pins(struct device *dev) return 0; } +static inline int pinctrl_init_done(struct device *dev) +{ + return 0; +} + #endif /* CONFIG_PINCTRL */ #endif /* PINCTRL_DEVINFO_H */ diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h index fe65962b264f..d921afd5f109 100644 --- a/include/linux/pinctrl/pinconf-generic.h +++ b/include/linux/pinctrl/pinconf-generic.h @@ -20,6 +20,11 @@ /** * enum pin_config_param - possible pin configuration parameters + * @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_DISABLE: disable any pin bias on the pin, a * transition from say pull-up to pull-down implies that you disable * pull-up in the process, this setting disables all biasing. @@ -29,14 +34,6 @@ * 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 total, i.e. the pin is connected to VDD. * @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. @@ -48,10 +45,9 @@ * If the argument is != 0 pull up/down is enabled, if it is 0, the * configuration is ignored. The proper way to disable it is to use * @PIN_CONFIG_BIAS_DISABLE. - * @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 - * push-pull mode, 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 total, i.e. the pin is connected to VDD. * @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 @@ -59,28 +55,26 @@ * @PIN_CONFIG_DRIVE_OPEN_SOURCE: the pin will be driven with open source * (open emitter). Setting this config will enable open source mode, the * argument is ignored. + * @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 + * push-pull mode, the 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_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 in usecs. Setting the + * argument to zero turns debouncing off. * @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. * @PIN_CONFIG_INPUT_SCHMITT: this will configure an input pin to run in * schmitt-trigger mode. If the schmitt-trigger has adjustable hysteresis, * the threshold value is given on a custom format as argument when * 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 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 - * the driver which alternative power source to use. - * @PIN_CONFIG_SLEW_RATE: if the pin can select slew rate, the argument to - * this parameter (on a custom format) tells the driver which alternative - * slew rate to use. + * @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. * @PIN_CONFIG_LOW_POWER_MODE: this will configure the pin for low power * operation, if several modes of operation are supported these can be * passed in the argument on a custom form, else just use argument 1 @@ -89,29 +83,35 @@ * 1 to indicate high level, argument 0 to indicate low level. (Please * see Documentation/pinctrl.txt, section "GPIO mode pitfalls" for a * discussion around this parameter.) + * @PIN_CONFIG_POWER_SOURCE: if the pin can select between different power + * supplies, the argument to this parameter (on a custom format) tells + * the driver which alternative power source to use. + * @PIN_CONFIG_SLEW_RATE: if the pin can select slew rate, the argument to + * this parameter (on a custom format) tells the driver which alternative + * slew rate to use. * @PIN_CONFIG_END: this is the last enumerator for pin configurations, if * you need to pass in custom configurations to the pin controller, use * PIN_CONFIG_END+1 as the base offset. */ enum pin_config_param { + PIN_CONFIG_BIAS_BUS_HOLD, 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_BIAS_PULL_UP, PIN_CONFIG_DRIVE_OPEN_DRAIN, PIN_CONFIG_DRIVE_OPEN_SOURCE, + PIN_CONFIG_DRIVE_PUSH_PULL, PIN_CONFIG_DRIVE_STRENGTH, + PIN_CONFIG_INPUT_DEBOUNCE, PIN_CONFIG_INPUT_ENABLE, - PIN_CONFIG_INPUT_SCHMITT_ENABLE, PIN_CONFIG_INPUT_SCHMITT, - PIN_CONFIG_INPUT_DEBOUNCE, - PIN_CONFIG_POWER_SOURCE, - PIN_CONFIG_SLEW_RATE, + PIN_CONFIG_INPUT_SCHMITT_ENABLE, PIN_CONFIG_LOW_POWER_MODE, PIN_CONFIG_OUTPUT, + PIN_CONFIG_POWER_SOURCE, + PIN_CONFIG_SLEW_RATE, PIN_CONFIG_END = 0x7FFF, }; diff --git a/include/linux/pinctrl/pinctrl-state.h b/include/linux/pinctrl/pinctrl-state.h index b5919f8e6d1a..23073519339f 100644 --- a/include/linux/pinctrl/pinctrl-state.h +++ b/include/linux/pinctrl/pinctrl-state.h @@ -9,6 +9,13 @@ * hogs to configure muxing and pins at boot, and also as a state * to go into when returning from sleep and idle in * .pm_runtime_resume() or ordinary .resume() for example. + * @PINCTRL_STATE_INIT: normally the pinctrl will be set to "default" + * before the driver's probe() function is called. There are some + * drivers where that is not appropriate becausing doing so would + * glitch the pins. In those cases you can add an "init" pinctrl + * which is the state of the pins before drive probe. After probe + * if the pins are still in "init" state they'll be moved to + * "default". * @PINCTRL_STATE_IDLE: the state the pinctrl handle shall be put into * when the pins are idle. This is a state where the system is relaxed * but not fully sleeping - some power may be on but clocks gated for @@ -20,5 +27,6 @@ * ordinary .suspend() function. */ #define PINCTRL_STATE_DEFAULT "default" +#define PINCTRL_STATE_INIT "init" #define PINCTRL_STATE_IDLE "idle" #define PINCTRL_STATE_SLEEP "sleep" |