Commit 6e986f88 authored by Thomas Richard's avatar Thomas Richard Committed by Bartosz Golaszewski
Browse files

gpio: aggregator: export symbols of the GPIO forwarder library 



Export all symbols and create header file for the GPIO forwarder library.
It will be used in the next changes.

Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarThomas Richard <thomas.richard@bootlin.com>
Link: https://lore.kernel.org/r/20250811-aaeon-up-board-pinctrl-support-v9-6-29f0cbbdfb30@bootlin.com


Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
parent b94cf35d

drivers/gpio/gpio-aggregator.c

+196 −6
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/configfs.h>

#include <linux/ctype.h>

#include <linux/delay.h>

#include <linux/export.h>

#include <linux/idr.h>

#include <linux/kernel.h>

#include <linux/list.h>
@@ -28,6 +29,7 @@ 


#include <linux/gpio/consumer.h>

#include <linux/gpio/driver.h>

#include <linux/gpio/forwarder.h>

#include <linux/gpio/machine.h>



#include "dev-sync-probe.h"
@@ -475,8 +477,180 @@ static int gpiochip_fwd_setup_delay_line(struct gpiochip_fwd *fwd) 
}

#endif	/* !CONFIG_OF_GPIO */



static struct gpiochip_fwd *

devm_gpiochip_fwd_alloc(struct device *dev, unsigned int ngpios)

/**

 * gpiochip_fwd_get_gpiochip - Get the GPIO chip for the GPIO forwarder

 * @fwd: GPIO forwarder

 *

 * Returns: The GPIO chip for the GPIO forwarder

 */

struct gpio_chip *gpiochip_fwd_get_gpiochip(struct gpiochip_fwd *fwd)

{

	return &fwd->chip;

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_get_gpiochip, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_gpio_get_direction - Return the current direction of a GPIO forwarder line

 * @fwd: GPIO forwarder

 * @offset: the offset of the line

 *

 * Returns: 0 for output, 1 for input, or an error code in case of error.

 */

int gpiochip_fwd_gpio_get_direction(struct gpiochip_fwd *fwd, unsigned int offset)

{

	struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);



	return gpio_fwd_get_direction(gc, offset);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_get_direction, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_gpio_direction_output - Set a GPIO forwarder line direction to

 * output

 * @fwd: GPIO forwarder

 * @offset: the offset of the line

 * @value: value to set

 *

 * Returns: 0 on success, or negative errno on failure.

 */

int gpiochip_fwd_gpio_direction_output(struct gpiochip_fwd *fwd, unsigned int offset,

				       int value)

{

	struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);



	return gpio_fwd_direction_output(gc, offset, value);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_direction_output, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_gpio_direction_input - Set a GPIO forwarder line direction to input

 * @fwd: GPIO forwarder

 * @offset: the offset of the line

 *

 * Returns: 0 on success, or negative errno on failure.

 */

int gpiochip_fwd_gpio_direction_input(struct gpiochip_fwd *fwd, unsigned int offset)

{

	struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);



	return gpio_fwd_direction_input(gc, offset);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_direction_input, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_gpio_get - Return a GPIO forwarder line's value

 * @fwd: GPIO forwarder

 * @offset: the offset of the line

 *

 * Returns: The GPIO's logical value, i.e. taking the ACTIVE_LOW status into

 * account, or negative errno on failure.

 */

int gpiochip_fwd_gpio_get(struct gpiochip_fwd *fwd, unsigned int offset)

{

	struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);



	return gpio_fwd_get(gc, offset);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_get, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_gpio_get_multiple - Get values for multiple GPIO forwarder lines

 * @fwd: GPIO forwarder

 * @mask: bit mask array; one bit per line; BITS_PER_LONG bits per word defines

 *        which lines are to be read

 * @bits: bit value array; one bit per line; BITS_PER_LONG bits per word will

 *        contains the read values for the lines specified by mask

 *

 * Returns: 0 on success, or negative errno on failure.

 */

int gpiochip_fwd_gpio_get_multiple(struct gpiochip_fwd *fwd, unsigned long *mask,

				   unsigned long *bits)

{

	struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);



	return gpio_fwd_get_multiple_locked(gc, mask, bits);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_get_multiple, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_gpio_set - Assign value to a GPIO forwarder line.

 * @fwd: GPIO forwarder

 * @offset: the offset of the line

 * @value: value to set

 *

 * Returns: 0 on success, or negative errno on failure.

 */

int gpiochip_fwd_gpio_set(struct gpiochip_fwd *fwd, unsigned int offset, int value)

{

	struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);



	return gpio_fwd_set(gc, offset, value);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_set, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_gpio_set_multiple - Assign values to multiple GPIO forwarder lines

 * @fwd: GPIO forwarder

 * @mask: bit mask array; one bit per output; BITS_PER_LONG bits per word

 *        defines which outputs are to be changed

 * @bits: bit value array; one bit per output; BITS_PER_LONG bits per word

 *        defines the values the outputs specified by mask are to be set to

 *

 * Returns: 0 on success, or negative errno on failure.

 */

int gpiochip_fwd_gpio_set_multiple(struct gpiochip_fwd *fwd, unsigned long *mask,

				   unsigned long *bits)

{

	struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);



	return gpio_fwd_set_multiple_locked(gc, mask, bits);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_set_multiple, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_gpio_set_config - Set @config for a GPIO forwarder line

 * @fwd: GPIO forwarder

 * @offset: the offset of the line

 * @config: Same packed config format as generic pinconf

 *

 * Returns: 0 on success, %-ENOTSUPP if the controller doesn't support setting

 * the configuration.

 */

int gpiochip_fwd_gpio_set_config(struct gpiochip_fwd *fwd, unsigned int offset,

				 unsigned long config)

{

	struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);



	return gpio_fwd_set_config(gc, offset, config);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_set_config, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_gpio_to_irq - Return the IRQ corresponding to a GPIO forwarder line

 * @fwd: GPIO forwarder

 * @offset: the offset of the line

 *

 * Returns: The Linux IRQ corresponding to the passed line, or an error code in

 * case of error.

 */

int gpiochip_fwd_gpio_to_irq(struct gpiochip_fwd *fwd, unsigned int offset)

{

	struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);



	return gpio_fwd_to_irq(gc, offset);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_to_irq, "GPIO_FORWARDER");



/**

 * devm_gpiochip_fwd_alloc - Allocate and initialize a new GPIO forwarder

 * @dev: Parent device pointer

 * @ngpios: Number of GPIOs in the forwarder

 *

 * Returns: An opaque object pointer, or an ERR_PTR()-encoded negative error

 * code on failure.

 */

struct gpiochip_fwd *devm_gpiochip_fwd_alloc(struct device *dev,

					     unsigned int ngpios)

{

	struct gpiochip_fwd *fwd;

	struct gpio_chip *chip;
@@ -507,9 +681,17 @@ devm_gpiochip_fwd_alloc(struct device *dev, unsigned int ngpios) 


	return fwd;

}

EXPORT_SYMBOL_NS_GPL(devm_gpiochip_fwd_alloc, "GPIO_FORWARDER");



static int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd,

				 struct gpio_desc *desc,

/**

 * gpiochip_fwd_desc_add - Add a GPIO desc in the forwarder

 * @fwd: GPIO forwarder

 * @desc: GPIO descriptor to register

 * @offset: offset for the GPIO in the forwarder

 *

 * Returns: 0 on success, or negative errno on failure.

 */

int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd, struct gpio_desc *desc,

			  unsigned int offset)

{

	struct gpio_chip *parent = gpiod_to_chip(desc);
@@ -537,8 +719,15 @@ static int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd, 


	return 0;

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_desc_add, "GPIO_FORWARDER");



static int gpiochip_fwd_register(struct gpiochip_fwd *fwd)

/**

 * gpiochip_fwd_register - Register a GPIO forwarder

 * @fwd: GPIO forwarder

 *

 * Returns: 0 on success, or negative errno on failure.

 */

int gpiochip_fwd_register(struct gpiochip_fwd *fwd)

{

	struct gpio_chip *chip = &fwd->chip;
@@ -549,6 +738,7 @@ static int gpiochip_fwd_register(struct gpiochip_fwd *fwd) 


	return devm_gpiochip_add_data(chip->parent, chip, fwd);

}

EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_register, "GPIO_FORWARDER");



/**

 * gpiochip_fwd_create() - Create a new GPIO forwarder

include/linux/gpio/forwarder.h

0 → 100644
+37 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __LINUX_GPIO_FORWARDER_H

#define __LINUX_GPIO_FORWARDER_H



struct gpio_desc;

struct gpio_chip;

struct gpiochip_fwd;



struct gpiochip_fwd *devm_gpiochip_fwd_alloc(struct device *dev,

					     unsigned int ngpios);

int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd,

			  struct gpio_desc *desc, unsigned int offset);

int gpiochip_fwd_register(struct gpiochip_fwd *fwd);



struct gpio_chip *gpiochip_fwd_get_gpiochip(struct gpiochip_fwd *fwd);



int gpiochip_fwd_gpio_get_direction(struct gpiochip_fwd *fwd,

				    unsigned int offset);

int gpiochip_fwd_gpio_direction_input(struct gpiochip_fwd *fwd,

				      unsigned int offset);

int gpiochip_fwd_gpio_direction_output(struct gpiochip_fwd *fwd,

				       unsigned int offset,

				       int value);

int gpiochip_fwd_gpio_get(struct gpiochip_fwd *fwd, unsigned int offset);

int gpiochip_fwd_gpio_get_multiple(struct gpiochip_fwd *fwd,

				   unsigned long *mask,

				   unsigned long *bits);

int gpiochip_fwd_gpio_set(struct gpiochip_fwd *fwd, unsigned int offset,

			  int value);

int gpiochip_fwd_gpio_set_multiple(struct gpiochip_fwd *fwd,

				   unsigned long *mask,

				   unsigned long *bits);

int gpiochip_fwd_gpio_set_config(struct gpiochip_fwd *fwd, unsigned int offset,

				 unsigned long config);

int gpiochip_fwd_gpio_to_irq(struct gpiochip_fwd *fwd, unsigned int offset);



#endif