diff options
Diffstat (limited to 'include/linux/pinctrl/pinconf-generic.h')
| -rw-r--r-- | include/linux/pinctrl/pinconf-generic.h | 117 |
1 files changed, 78 insertions, 39 deletions
diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h index 231d3075815a..1be4032071c2 100644 --- a/include/linux/pinctrl/pinconf-generic.h +++ b/include/linux/pinctrl/pinconf-generic.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Interface the generic pinconfig portions of the pinctrl subsystem * @@ -6,12 +7,19 @@ * This interface is used in the core to keep track of pins. * * Author: Linus Walleij <linus.walleij@linaro.org> - * - * License terms: GNU General Public License (GPL) version 2 */ #ifndef __LINUX_PINCTRL_PINCONF_GENERIC_H #define __LINUX_PINCTRL_PINCONF_GENERIC_H +#include <linux/types.h> + +#include <linux/pinctrl/machine.h> + +struct device_node; + +struct pinctrl_dev; +struct pinctrl_map; + /** * enum pin_config_param - possible pin configuration parameters * @PIN_CONFIG_BIAS_BUS_HOLD: the pin will be set to weakly latch so that it @@ -30,7 +38,8 @@ * 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 @@ -41,7 +50,8 @@ * @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 @@ -55,6 +65,8 @@ * 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_DRIVE_STRENGTH_UA: the pin will sink or source at most the current + * passed as argument. The argument is in uA. * @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 @@ -69,23 +81,44 @@ * @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 + * @PIN_CONFIG_INPUT_SCHMITT_UV: this will configure an input pin to run in + * schmitt-trigger mode. The argument is in uV. + * @PIN_CONFIG_MODE_LOW_POWER: 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 * to indicate low power mode, argument 0 turns low power mode off. + * @PIN_CONFIG_MODE_PWM: this will configure the pin for PWM + * @PIN_CONFIG_LEVEL: setting this will configure the pin as an output and + * drive a value on the line. Use argument 1 to indicate high level, + * argument 0 to indicate low level. Conversely the value of the line + * can be read using this parameter, if and only if that value can be + * represented as a binary 0 or 1 where 0 indicate a low voltage level + * and 1 indicate a high voltage level. + * (Please see Documentation/driver-api/pin-control.rst, + * section "GPIO mode pitfalls" for a discussion around this parameter.) * @PIN_CONFIG_OUTPUT_ENABLE: this will enable the pin's output mode * without driving a value there. For most platforms this reduces to * enable the output buffers and then let the pin controller current * configuration (eg. the currently selected mux function) drive values on * the line. Use argument 1 to enable output mode, argument 0 to disable * it. - * @PIN_CONFIG_OUTPUT: this will configure the pin as an output and drive a - * value on the line. Use argument 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_OUTPUT_IMPEDANCE_OHMS: this will configure the output impedance + * of the pin with the value passed as argument. The argument is in ohms. + * @PIN_CONFIG_PERSIST_STATE: retain pin state across sleep or controller reset * @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_SKEW_DELAY: if the pin has programmable skew rate (on inputs) + * or latch delay (on outputs) this parameter (in a custom format) + * specifies the clock skew or latch delay. It typically controls how + * many double inverters are put in front of the line. + * @PIN_CONFIG_SKEW_DELAY_INPUT_PS: if the pin has independent values for the + * programmable skew rate (on inputs) and latch delay (on outputs), then + * this parameter specifies the clock skew only. The argument is in ps. + * @PIN_CONFIG_SKEW_DELAY_OUPUT_PS: if the pin has independent values for the + * programmable skew rate (on inputs) and latch delay (on outputs), then + * this parameter specifies the latch delay only. The argument is in ps. + * @PIN_CONFIG_SLEEP_HARDWARE_STATE: indicate this is sleep related state. * @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. @@ -106,14 +139,23 @@ enum pin_config_param { PIN_CONFIG_DRIVE_OPEN_SOURCE, PIN_CONFIG_DRIVE_PUSH_PULL, PIN_CONFIG_DRIVE_STRENGTH, + PIN_CONFIG_DRIVE_STRENGTH_UA, PIN_CONFIG_INPUT_DEBOUNCE, PIN_CONFIG_INPUT_ENABLE, PIN_CONFIG_INPUT_SCHMITT, PIN_CONFIG_INPUT_SCHMITT_ENABLE, - PIN_CONFIG_LOW_POWER_MODE, + PIN_CONFIG_INPUT_SCHMITT_UV, + PIN_CONFIG_MODE_LOW_POWER, + PIN_CONFIG_MODE_PWM, + PIN_CONFIG_LEVEL, PIN_CONFIG_OUTPUT_ENABLE, - PIN_CONFIG_OUTPUT, + PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS, + PIN_CONFIG_PERSIST_STATE, PIN_CONFIG_POWER_SOURCE, + PIN_CONFIG_SKEW_DELAY, + PIN_CONFIG_SKEW_DELAY_INPUT_PS, + PIN_CONFIG_SKEW_DELAY_OUTPUT_PS, + PIN_CONFIG_SLEEP_HARDWARE_STATE, PIN_CONFIG_SLEW_RATE, PIN_CONFIG_END = 0x7F, PIN_CONFIG_MAX = 0xFF, @@ -147,63 +189,59 @@ static inline unsigned long pinconf_to_config_packed(enum pin_config_param param return PIN_CONF_PACKED(param, argument); } -#ifdef CONFIG_GENERIC_PINCONF - -#ifdef CONFIG_DEBUG_FS -#define PCONFDUMP(a, b, c, d) { \ - .param = a, .display = b, .format = c, .has_arg = d \ +#define PCONFDUMP_WITH_VALUES(a, b, c, d, e, f) { \ + .param = a, .display = b, .format = c, .has_arg = d, \ + .values = e, .num_values = f \ } +#define PCONFDUMP(a, b, c, d) PCONFDUMP_WITH_VALUES(a, b, c, d, NULL, 0) + struct pin_config_item { const enum pin_config_param param; const char * const display; const char * const format; bool has_arg; + const char * const *values; + size_t num_values; }; -#endif /* CONFIG_DEBUG_FS */ - -#ifdef CONFIG_OF - -#include <linux/device.h> -#include <linux/pinctrl/machine.h> -struct pinctrl_dev; -struct pinctrl_map; struct pinconf_generic_params { const char * const property; enum pin_config_param param; u32 default_value; + const char * const *values; + size_t num_values; }; 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, + unsigned int *reserved_maps, unsigned int *num_maps, enum pinctrl_map_type type); int pinconf_generic_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np_config, struct pinctrl_map **map, - unsigned *num_maps, enum pinctrl_map_type type); + unsigned int *num_maps, enum pinctrl_map_type type); void pinconf_generic_dt_free_map(struct pinctrl_dev *pctldev, - struct pinctrl_map *map, unsigned num_maps); + struct pinctrl_map *map, unsigned int num_maps); -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) +static inline int pinconf_generic_dt_node_to_map_group(struct pinctrl_dev *pctldev, + struct device_node *np_config, struct pinctrl_map **map, + unsigned int *num_maps) { return pinconf_generic_dt_node_to_map(pctldev, np_config, map, num_maps, PIN_MAP_TYPE_CONFIGS_GROUP); } -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) +static inline int pinconf_generic_dt_node_to_map_pin(struct pinctrl_dev *pctldev, + struct device_node *np_config, struct pinctrl_map **map, + unsigned int *num_maps) { return pinconf_generic_dt_node_to_map(pctldev, np_config, map, num_maps, PIN_MAP_TYPE_CONFIGS_PIN); } -static inline int pinconf_generic_dt_node_to_map_all( - struct pinctrl_dev *pctldev, struct device_node *np_config, - struct pinctrl_map **map, unsigned *num_maps) +static inline int pinconf_generic_dt_node_to_map_all(struct pinctrl_dev *pctldev, + struct device_node *np_config, struct pinctrl_map **map, + unsigned *num_maps) { /* * passing the type as PIN_MAP_TYPE_INVALID causes the underlying parser @@ -212,8 +250,9 @@ static inline int pinconf_generic_dt_node_to_map_all( return pinconf_generic_dt_node_to_map(pctldev, np_config, map, num_maps, PIN_MAP_TYPE_INVALID); } -#endif - -#endif /* CONFIG_GENERIC_PINCONF */ +int pinconf_generic_dt_node_to_map_pinmux(struct pinctrl_dev *pctldev, + struct device_node *np, + struct pinctrl_map **map, + unsigned int *num_maps); #endif /* __LINUX_PINCTRL_PINCONF_GENERIC_H */ |