/* SPDX-License-Identifier: GPL-2.0+ */
/*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@com>
*/
#ifndef __PINCTRL_H
/**
* struct pinconf_param - pin config parameters
- *
- * @property: property name in DT nodes
- * @param: ID for this config parameter
- * @default_value: default value for this config parameter used in case
- * no value is specified in DT nodes
+ * @property: Property name in DT nodes
+ * @param: ID for this config parameter
+ * @default_value: default value for this config parameter used in case
+ * no value is specified in DT nodes
*/
struct pinconf_param {
const char * const property;
* struct pinctrl_ops - pin control operations, to be implemented by
* pin controller drivers.
*
- * The @set_state is the only mandatory operation. You can implement your
- * pinctrl driver with its own @set_state. In this case, the other callbacks
- * are not required. Otherwise, generic pinctrl framework is also available;
- * use pinctrl_generic_set_state for @set_state, and implement other operations
+ * set_state() is the only mandatory operation. You can implement your pinctrl
+ * driver with its own @set_state. In this case, the other callbacks are not
+ * required. Otherwise, generic pinctrl framework is also available; use
+ * pinctrl_generic_set_state for @set_state, and implement other operations
* depending on your necessity.
- *
- * @get_pins_count: return number of selectable named pins available
- * in this driver. (necessary to parse "pins" property in DTS)
- * @get_pin_name: return the pin name of the pin selector,
- * called by the core to figure out which pin it shall do
- * operations to. (necessary to parse "pins" property in DTS)
- * @get_groups_count: return number of selectable named groups available
- * in this driver. (necessary to parse "groups" property in DTS)
- * @get_group_name: return the group name of the group selector,
- * called by the core to figure out which pin group it shall do
- * operations to. (necessary to parse "groups" property in DTS)
- * @get_functions_count: return number of selectable named functions available
- * in this driver. (necessary for pin-muxing)
- * @get_function_name: return the function name of the muxing selector,
- * called by the core to figure out which mux setting it shall map a
- * certain device to. (necessary for pin-muxing)
- * @pinmux_set: enable a certain muxing function with a certain pin.
- * The @func_selector selects a certain function whereas @pin_selector
- * selects a certain pin to be used. On simple controllers one of them
- * may be ignored. (necessary for pin-muxing against a single pin)
- * @pinmux_group_set: enable a certain muxing function with a certain pin
- * group. The @func_selector selects a certain function whereas
- * @group_selector selects a certain set of pins to be used. On simple
- * controllers one of them may be ignored.
- * (necessary for pin-muxing against a pin group)
- * @pinmux_property_set: enable a pinmux group. @pinmux_group should specify the
- * pin identifier and mux settings. The exact format of a pinmux group is
- * left up to the driver. The pin selector for the mux-ed pin should be
- * returned on success. (necessary to parse the "pinmux" property in DTS)
- * @pinconf_num_params: number of driver-specific parameters to be parsed
- * from device trees (necessary for pin-configuration)
- * @pinconf_params: list of driver_specific parameters to be parsed from
- * device trees (necessary for pin-configuration)
- * @pinconf_set: configure an individual pin with a given parameter.
- * (necessary for pin-configuration against a single pin)
- * @pinconf_group_set: configure all pins in a group with a given parameter.
- * (necessary for pin-configuration against a pin group)
- * @set_state: do pinctrl operations specified by @config, a pseudo device
- * pointing a config node. (necessary for pinctrl_full)
- * @set_state_simple: do needed pinctrl operations for a peripherl @periph.
- * (necessary for pinctrl_simple)
- * @get_pin_muxing: display the muxing of a given pin.
- * @gpio_request_enable: requests and enables GPIO on a certain pin.
- * Implement this only if you can mux every pin individually as GPIO. The
- * affected GPIO range is passed along with an offset(pin number) into that
- * specific GPIO range - function selectors and pin groups are orthogonal
- * to this, the core will however make sure the pins do not collide.
- * @gpio_disable_free: free up GPIO muxing on a certain pin, the reverse of
- * @gpio_request_enable
*/
struct pinctrl_ops {
+ /**
+ * @get_pins_count: Get the number of selectable pins
+ *
+ * @dev: Pinctrl device to use
+ *
+ * This function is necessary to parse the "pins" property in DTS.
+ *
+ * @Return:
+ * number of selectable named pins available in this driver
+ */
int (*get_pins_count)(struct udevice *dev);
+
+ /**
+ * @get_pin_name: Get the name of a pin
+ *
+ * @dev: Pinctrl device of the pin
+ *
+ * @selector: The pin selector
+ *
+ * This function is called by the core to figure out which pin it will
+ * do operations to. This function is necessary to parse the "pins"
+ * property in DTS.
+ *
+ * @Return: const pointer to the name of the pin
+ */
const char *(*get_pin_name)(struct udevice *dev, unsigned selector);
+
+ /**
+ * @get_groups_count: Get the number of selectable groups
+ *
+ * @dev: Pinctrl device to use
+ *
+ * This function is necessary to parse the "groups" property in DTS.
+ *
+ * @Return:
+ * number of selectable named groups available in the driver
+ */
int (*get_groups_count)(struct udevice *dev);
+
+ /**
+ * @get_group_name: Get the name of a group
+ *
+ * @dev: Pinctrl device of the group
+ *
+ * @selector: The group selector
+ *
+ * This function is called by the core to figure out which group it
+ * will do operations to. This function is necessary to parse the
+ * "groups" property in DTS.
+ *
+ * @Return: Pointer to the name of the group
+ */
const char *(*get_group_name)(struct udevice *dev, unsigned selector);
+
+ /**
+ * @get_functions_count: Get the number of selectable functions
+ *
+ * @dev: Pinctrl device to use
+ *
+ * This function is necessary for pin-muxing.
+ *
+ * @Return:
+ * number of selectable named functions available in this driver
+ */
int (*get_functions_count)(struct udevice *dev);
+
+ /**
+ * @get_function_name: Get the name of a function
+ *
+ * @dev: Pinmux device of the function
+ *
+ * @selector: The function selector
+ *
+ * This function is called by the core to figure out which mux setting
+ * it will map a certain device to. This function is necessary for
+ * pin-muxing.
+ *
+ * @Return:
+ * Pointer to the function name of the muxing selector
+ */
const char *(*get_function_name)(struct udevice *dev,
unsigned selector);
+
+ /**
+ * @pinmux_set: Mux a pin to a function
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @pin_selector: The pin selector
+ *
+ * @func_selector: The func selector
+ *
+ * On simple controllers one of @pin_selector or @func_selector may be
+ * ignored. This function is necessary for pin-muxing against a single
+ * pin.
+ *
+ * @Return: 0 if OK, or negative error code on failure
+ */
int (*pinmux_set)(struct udevice *dev, unsigned pin_selector,
unsigned func_selector);
+
+ /**
+ * @pinmux_group_set: Mux a group of pins to a function
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @group_selector: The group selector
+ *
+ * @func_selector: The func selector
+ *
+ * On simple controllers one of @group_selector or @func_selector may be
+ * ignored. This function is necessary for pin-muxing against a group of
+ * pins.
+ *
+ * @Return: 0 if OK, or negative error code on failure
+ */
int (*pinmux_group_set)(struct udevice *dev, unsigned group_selector,
unsigned func_selector);
+
+ /**
+ * @pinmux_property_set: Enable a pinmux group
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @pinmux_group: A u32 representing the pin identifier and mux
+ * settings. The exact format of a pinmux group is left
+ * up to the driver.
+ *
+ * Mux a single pin to a single function based on a driver-specific
+ * pinmux group. This function is necessary for parsing the "pinmux"
+ * property in DTS, and for pin-muxing against a pinmux group.
+ *
+ * @Return:
+ * Pin selector for the muxed pin if OK, or negative error code on
+ * failure
+ */
int (*pinmux_property_set)(struct udevice *dev, u32 pinmux_group);
+
+ /**
+ * @pinconf_num_params:
+ * Number of driver-specific parameters to be parsed from device
+ * trees. This member is necessary for pin configuration.
+ */
unsigned int pinconf_num_params;
+
+ /**
+ * @pinconf_params:
+ * List of driver-specific parameters to be parsed from the device
+ * tree. This member is necessary for pin configuration.
+ */
const struct pinconf_param *pinconf_params;
+
+ /**
+ * @pinconf_set: Configure an individual pin with a parameter
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @pin_selector: The pin selector
+ *
+ * @param: An &enum pin_config_param from @pinconf_params
+ *
+ * @argument: The argument to this param from the device tree, or
+ * @pinconf_params.default_value
+ *
+ * This function is necessary for pin configuration against a single
+ * pin.
+ *
+ * @Return: 0 if OK, or negative error code on failure
+ */
int (*pinconf_set)(struct udevice *dev, unsigned pin_selector,
unsigned param, unsigned argument);
+
+ /**
+ * @pinconf_group_set: Configure all pins in a group with a parameter
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @pin_selector: The group selector
+ *
+ * @param: A &enum pin_config_param from
+ * @pinconf_params
+ *
+ * @argument: The argument to this param from the device tree, or
+ * @pinconf_params.default_value
+ *
+ * This function is necessary for pin configuration against a group of
+ * pins.
+ *
+ * @Return: 0 if OK, or negative error code on failure
+ */
int (*pinconf_group_set)(struct udevice *dev, unsigned group_selector,
unsigned param, unsigned argument);
+
+ /**
+ * @set_state: Configure a pinctrl device
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @config: Pseudo device pointing a config node
+ *
+ * This function is required to be implemented by all pinctrl drivers.
+ * Drivers may set this member to pinctrl_generic_set_state(), which
+ * will call other functions in &struct pinctrl_ops to parse
+ * @config.
+ *
+ * @Return: 0 if OK, or negative error code on failure
+ */
int (*set_state)(struct udevice *dev, struct udevice *config);
- /* for pinctrl-simple */
+ /**
+ * @set_state_simple: Configure a pinctrl device
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @config: Pseudo-device pointing a config node
+ *
+ * This function is usually a simpler version of set_state(). Only the
+ * first pinctrl device on the system is supported by this function.
+ *
+ * @Return: 0 if OK, or negative error code on failure
+ */
int (*set_state_simple)(struct udevice *dev, struct udevice *periph);
+
/**
- * request() - Request a particular pinctrl function
+ * @request: Request a particular pinctrl function
+ *
+ * @dev: Device to adjust (%UCLASS_PINCTRL)
+ *
+ * @func: Function number (driver-specific)
*
* This activates the selected function.
*
- * @dev: Device to adjust (UCLASS_PINCTRL)
- * @func: Function number (driver-specific)
- * @return 0 if OK, -ve on error
+ * @Return: 0 if OK, or negative error code on failure
*/
int (*request)(struct udevice *dev, int func, int flags);
/**
- * get_periph_id() - get the peripheral ID for a device
+ * @get_periph_id: Get the peripheral ID for a device
+ *
+ * @dev: Pinctrl device to use for decoding
+ *
+ * @periph: Device to check
*
* This generally looks at the peripheral's device tree node to work
* out the peripheral ID. The return value is normally interpreted as
- * enum periph_id. so long as this is defined by the platform (which it
+ * &enum periph_id. so long as this is defined by the platform (which it
* should be).
*
- * @dev: Pinctrl device to use for decoding
- * @periph: Device to check
- * @return peripheral ID of @periph, or -ENOENT on error
+ * @Return:
+ * Peripheral ID of @periph, or %-ENOENT on error
*/
int (*get_periph_id)(struct udevice *dev, struct udevice *periph);
/**
- * get_gpio_mux() - get the mux value for a particular GPIO
+ * @get_gpio_mux: Get the mux value for a particular GPIO
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @banknum: GPIO bank number
+ *
+ * @index: GPIO index within the bank
*
* This allows the raw mux value for a GPIO to be obtained. It is
* useful for displaying the function being used by that GPIO, such
* subsystem and should not be used by generic code. Typically it is
* used by a GPIO driver with knowledge of the SoC pinctrl setup.
*
- * @dev: Pinctrl device to use
- * @banknum: GPIO bank number
- * @index: GPIO index within the bank
- * @return mux value (SoC-specific, e.g. 0 for input, 1 for output)
+ * @Return:
+ * Mux value (SoC-specific, e.g. 0 for input, 1 for output)
*/
int (*get_gpio_mux)(struct udevice *dev, int banknum, int index);
/**
- * get_pin_muxing() - show pin muxing
+ * @get_pin_muxing: Show pin muxing
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @selector: Pin selector
+ *
+ * @buf: Buffer to fill with pin muxing description
+ *
+ * @size: Size of @buf
*
* This allows to display the muxing of a given pin. It's useful for
- * debug purpose to know if a pin is configured as GPIO or as an
- * alternate function and which one.
- * Typically it is used by a PINCTRL driver with knowledge of the SoC
- * pinctrl setup.
- *
- * @dev: Pinctrl device to use
- * @selector: Pin selector
- * @buf Pin's muxing description
- * @size Pin's muxing description length
- * return 0 if OK, -ve on error
+ * debug purposes to know if a pin is configured as GPIO or as an
+ * alternate function and which one. Typically it is used by a PINCTRL
+ * driver with knowledge of the SoC pinctrl setup.
+ *
+ * @Return: 0 if OK, or negative error code on failure
*/
int (*get_pin_muxing)(struct udevice *dev, unsigned int selector,
char *buf, int size);
/**
- * gpio_request_enable: requests and enables GPIO on a certain pin.
+ * @gpio_request_enable: Request and enable GPIO on a certain pin.
+ *
+ * @dev: Pinctrl device to use
+ *
+ * @selector: Pin selector
+ *
+ * Implement this only if you can mux every pin individually as GPIO.
+ * The affected GPIO range is passed along with an offset(pin number)
+ * into that specific GPIO range - function selectors and pin groups are
+ * orthogonal to this, the core will however make sure the pins do not
+ * collide.
*
- * @dev: Pinctrl device to use
- * @selector: Pin selector
- * return 0 if OK, -ve on error
+ * @Return:
+ * 0 if OK, or negative error code on failure
*/
int (*gpio_request_enable)(struct udevice *dev, unsigned int selector);
/**
- * gpio_disable_free: free up GPIO muxing on a certain pin.
+ * @gpio_disable_free: Free up GPIO muxing on a certain pin.
*
- * @dev: Pinctrl device to use
- * @selector: Pin selector
- * return 0 if OK, -ve on error
+ * @dev: Pinctrl device to use
+ *
+ * @selector: Pin selector
+ *
+ * This function is the reverse of @gpio_request_enable.
+ *
+ * @Return: 0 if OK, or negative error code on failure
*/
int (*gpio_disable_free)(struct udevice *dev, unsigned int selector);
};
#define pinctrl_get_ops(dev) ((struct pinctrl_ops *)(dev)->driver->ops)
/**
- * Generic pin configuration paramters
+ * enum pin_config_param - Generic pin configuration parameters
*
- * enum pin_config_param - possible pin configuration parameters
- * @PIN_CONFIG_BIAS_BUS_HOLD: the pin will be set to weakly latch so that it
+ * @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
+ * @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.
- * @PIN_CONFIG_BIAS_HIGH_IMPEDANCE: the pin will be set to a high impedance
+ * @PIN_CONFIG_BIAS_HIGH_IMPEDANCE: The pin will be set to a high impedance
* mode, also know as "third-state" (tristate) or "high-Z" or "floating".
* On output pins this effectively disconnects the pin, which is useful
* 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_PULL_DOWN: the pin will be pulled down (usually with high
+ * @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.
- * @PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: the pin will be pulled up or down based
+ * @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
* be decided completely inside the hardware block and not be readable
* 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_BIAS_PULL_UP: the pin will be pulled up (usually with high
+ * @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
+ * @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
* config will enable open drain mode, the argument is ignored.
- * @PIN_CONFIG_DRIVE_OPEN_SOURCE: the pin will be driven with open source
+ * @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
+ * @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
+ * @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,
+ * @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
* argument to zero turns debouncing off.
- * @PIN_CONFIG_INPUT_ENABLE: enable the pin's input. Note that this does not
+ * @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: this will configure an input pin to run in
+ * @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_SCHMITT_ENABLE: control schmitt-trigger mode on the pin.
+ * @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_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
* to indicate low power mode, argument 0 turns low power mode off.
- * @PIN_CONFIG_OUTPUT_ENABLE: this will enable the pin's output mode
+ * @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
+ * @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/driver-api/pinctl.rst,
* section "GPIO mode pitfalls" for a discussion around this parameter.)
- * @PIN_CONFIG_POWER_SOURCE: if the pin can select between different power
+ * @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_SLEEP_HARDWARE_STATE: indicate this is sleep related state.
- * @PIN_CONFIG_SLEW_RATE: if the pin can select slew rate, the argument to
+ * @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.
- * @PIN_CONFIG_SKEW_DELAY: if the pin has programmable skew rate (on inputs)
+ * @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_END: this is the last enumerator for pin configurations, if
+ * @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.
- * @PIN_CONFIG_MAX: this is the maximum configuration value that can be
+ * @PIN_CONFIG_MAX: This is the maximum configuration value that can be
* presented using the packed format.
*/
enum pin_config_param {
#if CONFIG_IS_ENABLED(PINCTRL_GENERIC)
/**
- * pinctrl_generic_set_state() - generic set_state operation
+ * pinctrl_generic_set_state() - Generic set_state operation
+ * @pctldev: Pinctrl device to use
+ * @config: Config device (pseudo device), pointing a config node in DTS
+ *
* Parse the DT node of @config and its children and handle generic properties
* such as "pins", "groups", "functions", and pin configuration parameters.
*
- * @pctldev: pinctrl device
- * @config: config device (pseudo device), pointing a config node in DTS
- * @return: 0 on success, or negative error code on failure
+ * Return: 0 on success, or negative error code on failure
*/
int pinctrl_generic_set_state(struct udevice *pctldev, struct udevice *config);
#else
#if CONFIG_IS_ENABLED(PINCTRL)
/**
- * pinctrl_select_state() - set a device to a given state
+ * pinctrl_select_state() - Set a device to a given state
+ * @dev: Peripheral device
+ * @statename: State name, like "default"
*
- * @dev: peripheral device
- * @statename: state name, like "default"
- * @return: 0 on success, or negative error code on failure
+ * Return: 0 on success, or negative error code on failure
*/
int pinctrl_select_state(struct udevice *dev, const char *statename);
#else
/**
* pinctrl_request() - Request a particular pinctrl function
- *
- * @dev: Device to check (UCLASS_PINCTRL)
+ * @dev: Pinctrl device to use
* @func: Function number (driver-specific)
* @flags: Flags (driver-specific)
- * @return 0 if OK, -ve on error
+ *
+ * Return: 0 if OK, or negative error code on failure
*/
int pinctrl_request(struct udevice *dev, int func, int flags);
/**
* pinctrl_request_noflags() - Request a particular pinctrl function
+ * @dev: Pinctrl device to use
+ * @func: Function number (driver-specific)
*
* This is similar to pinctrl_request() but uses 0 for @flags.
*
- * @dev: Device to check (UCLASS_PINCTRL)
- * @func: Function number (driver-specific)
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, or negative error code on failure
*/
int pinctrl_request_noflags(struct udevice *dev, int func);
/**
- * pinctrl_get_periph_id() - get the peripheral ID for a device
+ * pinctrl_get_periph_id() - Get the peripheral ID for a device
+ * @dev: Pinctrl device to use for decoding
+ * @periph: Device to check
*
* This generally looks at the peripheral's device tree node to work out the
* peripheral ID. The return value is normally interpreted as enum periph_id.
* so long as this is defined by the platform (which it should be).
*
- * @dev: Pinctrl device to use for decoding
- * @periph: Device to check
- * @return peripheral ID of @periph, or -ENOENT on error
+ * Return: Peripheral ID of @periph, or -ENOENT on error
*/
int pinctrl_get_periph_id(struct udevice *dev, struct udevice *periph);
/**
* pinctrl_get_gpio_mux() - get the mux value for a particular GPIO
+ * @dev: Pinctrl device to use
+ * @banknum: GPIO bank number
+ * @index: GPIO index within the bank
*
* This allows the raw mux value for a GPIO to be obtained. It is
* useful for displaying the function being used by that GPIO, such
* subsystem and should not be used by generic code. Typically it is
* used by a GPIO driver with knowledge of the SoC pinctrl setup.
*
- * @dev: Pinctrl device to use
- * @banknum: GPIO bank number
- * @index: GPIO index within the bank
- * @return mux value (SoC-specific, e.g. 0 for input, 1 for output)
+ * Return: Mux value (SoC-specific, e.g. 0 for input, 1 for output)
*/
int pinctrl_get_gpio_mux(struct udevice *dev, int banknum, int index);
/**
* pinctrl_get_pin_muxing() - Returns the muxing description
+ * @dev: Pinctrl device to use
+ * @selector: Pin index within pin-controller
+ * @buf: Pin's muxing description
+ * @size: Pin's muxing description length
*
* This allows to display the muxing description of the given pin for
* debug purpose
*
- * @dev: Pinctrl device to use
- * @selector Pin index within pin-controller
- * @buf Pin's muxing description
- * @size Pin's muxing description length
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, or negative error code on failure
*/
int pinctrl_get_pin_muxing(struct udevice *dev, int selector, char *buf,
int size);
/**
- * pinctrl_get_pins_count() - display pin-controller pins number
+ * pinctrl_get_pins_count() - Display pin-controller pins number
+ * @dev: Pinctrl device to use
*
* This allows to know the number of pins owned by a given pin-controller
*
- * @dev: Pinctrl device to use
- * @return pins number if OK, -ve on error
+ * Return: Number of pins if OK, or negative error code on failure
*/
int pinctrl_get_pins_count(struct udevice *dev);
/**
* pinctrl_get_pin_name() - Returns the pin's name
+ * @dev: Pinctrl device to use
+ * @selector: Pin index within pin-controller
+ * @buf: Buffer to fill with the name of the pin
+ * @size: Size of @buf
*
* This allows to display the pin's name for debug purpose
*
- * @dev: Pinctrl device to use
- * @selector Pin index within pin-controller
- * @buf Pin's name
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, or negative error code on failure
*/
int pinctrl_get_pin_name(struct udevice *dev, int selector, char *buf,
int size);
/**
- * pinctrl_gpio_request() - request a single pin to be used as GPIO
+ * pinctrl_gpio_request() - Request a single pin to be used as GPIO
+ * @dev: GPIO peripheral device
+ * @offset: GPIO pin offset from the GPIO controller
*
- * @dev: GPIO peripheral device
- * @offset: the GPIO pin offset from the GPIO controller
- * @return: 0 on success, or negative error code on failure
+ * Return: 0 on success, or negative error code on failure
*/
int pinctrl_gpio_request(struct udevice *dev, unsigned offset);
/**
- * pinctrl_gpio_free() - free a single pin used as GPIO
+ * pinctrl_gpio_free() - Free a single pin used as GPIO
+ * @dev: GPIO peripheral device
+ * @offset: GPIO pin offset from the GPIO controller
*
- * @dev: GPIO peripheral device
- * @offset: the GPIO pin offset from the GPIO controller
- * @return: 0 on success, or negative error code on failure
+ * Return: 0 on success, or negative error code on failure
*/
int pinctrl_gpio_free(struct udevice *dev, unsigned offset);
projects / platform / kernel / u-boot.git / commitdiff