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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: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Thomas 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: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Thomas Richard
Bartosz Golaszewski
parent
b94cf35db6
commit
6e986f8852
2 changed files with 233 additions and 6 deletions
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@ -12,6 +12,7 @@
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#include <linux/configfs.h>
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#include <linux/ctype.h>
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#include <linux/delay.h>
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#include <linux/export.h>
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#include <linux/idr.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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@ -28,6 +29,7 @@
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#include <linux/gpio/consumer.h>
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#include <linux/gpio/driver.h>
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#include <linux/gpio/forwarder.h>
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#include <linux/gpio/machine.h>
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#include "dev-sync-probe.h"
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@ -475,8 +477,180 @@ static int gpiochip_fwd_setup_delay_line(struct gpiochip_fwd *fwd)
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}
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#endif /* !CONFIG_OF_GPIO */
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static struct gpiochip_fwd *
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devm_gpiochip_fwd_alloc(struct device *dev, unsigned int ngpios)
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/**
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* gpiochip_fwd_get_gpiochip - Get the GPIO chip for the GPIO forwarder
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* @fwd: GPIO forwarder
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*
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* Returns: The GPIO chip for the GPIO forwarder
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*/
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struct gpio_chip *gpiochip_fwd_get_gpiochip(struct gpiochip_fwd *fwd)
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{
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return &fwd->chip;
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_get_gpiochip, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_gpio_get_direction - Return the current direction of a GPIO forwarder line
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* @fwd: GPIO forwarder
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* @offset: the offset of the line
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*
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* Returns: 0 for output, 1 for input, or an error code in case of error.
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*/
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int gpiochip_fwd_gpio_get_direction(struct gpiochip_fwd *fwd, unsigned int offset)
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{
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struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
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return gpio_fwd_get_direction(gc, offset);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_get_direction, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_gpio_direction_output - Set a GPIO forwarder line direction to
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* output
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* @fwd: GPIO forwarder
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* @offset: the offset of the line
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* @value: value to set
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*
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* Returns: 0 on success, or negative errno on failure.
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*/
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int gpiochip_fwd_gpio_direction_output(struct gpiochip_fwd *fwd, unsigned int offset,
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int value)
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{
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struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
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return gpio_fwd_direction_output(gc, offset, value);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_direction_output, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_gpio_direction_input - Set a GPIO forwarder line direction to input
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* @fwd: GPIO forwarder
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* @offset: the offset of the line
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*
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* Returns: 0 on success, or negative errno on failure.
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*/
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int gpiochip_fwd_gpio_direction_input(struct gpiochip_fwd *fwd, unsigned int offset)
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{
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struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
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return gpio_fwd_direction_input(gc, offset);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_direction_input, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_gpio_get - Return a GPIO forwarder line's value
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* @fwd: GPIO forwarder
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* @offset: the offset of the line
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*
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* Returns: The GPIO's logical value, i.e. taking the ACTIVE_LOW status into
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* account, or negative errno on failure.
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*/
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int gpiochip_fwd_gpio_get(struct gpiochip_fwd *fwd, unsigned int offset)
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{
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struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
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return gpio_fwd_get(gc, offset);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_get, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_gpio_get_multiple - Get values for multiple GPIO forwarder lines
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* @fwd: GPIO forwarder
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* @mask: bit mask array; one bit per line; BITS_PER_LONG bits per word defines
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* which lines are to be read
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* @bits: bit value array; one bit per line; BITS_PER_LONG bits per word will
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* contains the read values for the lines specified by mask
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*
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* Returns: 0 on success, or negative errno on failure.
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*/
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int gpiochip_fwd_gpio_get_multiple(struct gpiochip_fwd *fwd, unsigned long *mask,
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unsigned long *bits)
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{
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struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
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return gpio_fwd_get_multiple_locked(gc, mask, bits);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_get_multiple, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_gpio_set - Assign value to a GPIO forwarder line.
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* @fwd: GPIO forwarder
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* @offset: the offset of the line
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* @value: value to set
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*
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* Returns: 0 on success, or negative errno on failure.
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*/
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int gpiochip_fwd_gpio_set(struct gpiochip_fwd *fwd, unsigned int offset, int value)
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{
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struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
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return gpio_fwd_set(gc, offset, value);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_set, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_gpio_set_multiple - Assign values to multiple GPIO forwarder lines
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* @fwd: GPIO forwarder
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* @mask: bit mask array; one bit per output; BITS_PER_LONG bits per word
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* defines which outputs are to be changed
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* @bits: bit value array; one bit per output; BITS_PER_LONG bits per word
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* defines the values the outputs specified by mask are to be set to
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*
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* Returns: 0 on success, or negative errno on failure.
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*/
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int gpiochip_fwd_gpio_set_multiple(struct gpiochip_fwd *fwd, unsigned long *mask,
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unsigned long *bits)
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{
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struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
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return gpio_fwd_set_multiple_locked(gc, mask, bits);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_set_multiple, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_gpio_set_config - Set @config for a GPIO forwarder line
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* @fwd: GPIO forwarder
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* @offset: the offset of the line
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* @config: Same packed config format as generic pinconf
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*
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* Returns: 0 on success, %-ENOTSUPP if the controller doesn't support setting
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* the configuration.
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*/
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int gpiochip_fwd_gpio_set_config(struct gpiochip_fwd *fwd, unsigned int offset,
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unsigned long config)
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{
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struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
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return gpio_fwd_set_config(gc, offset, config);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_set_config, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_gpio_to_irq - Return the IRQ corresponding to a GPIO forwarder line
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* @fwd: GPIO forwarder
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* @offset: the offset of the line
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*
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* Returns: The Linux IRQ corresponding to the passed line, or an error code in
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* case of error.
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*/
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int gpiochip_fwd_gpio_to_irq(struct gpiochip_fwd *fwd, unsigned int offset)
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{
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struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
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return gpio_fwd_to_irq(gc, offset);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_to_irq, "GPIO_FORWARDER");
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/**
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* devm_gpiochip_fwd_alloc - Allocate and initialize a new GPIO forwarder
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* @dev: Parent device pointer
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* @ngpios: Number of GPIOs in the forwarder
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*
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* Returns: An opaque object pointer, or an ERR_PTR()-encoded negative error
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* code on failure.
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*/
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struct gpiochip_fwd *devm_gpiochip_fwd_alloc(struct device *dev,
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unsigned int ngpios)
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{
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struct gpiochip_fwd *fwd;
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struct gpio_chip *chip;
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@ -507,10 +681,18 @@ devm_gpiochip_fwd_alloc(struct device *dev, unsigned int ngpios)
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return fwd;
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}
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EXPORT_SYMBOL_NS_GPL(devm_gpiochip_fwd_alloc, "GPIO_FORWARDER");
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static int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd,
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struct gpio_desc *desc,
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unsigned int offset)
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/**
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* gpiochip_fwd_desc_add - Add a GPIO desc in the forwarder
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* @fwd: GPIO forwarder
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* @desc: GPIO descriptor to register
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* @offset: offset for the GPIO in the forwarder
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*
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* Returns: 0 on success, or negative errno on failure.
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*/
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int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd, struct gpio_desc *desc,
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unsigned int offset)
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{
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struct gpio_chip *parent = gpiod_to_chip(desc);
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struct gpio_chip *chip = &fwd->chip;
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@ -537,8 +719,15 @@ static int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd,
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return 0;
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_desc_add, "GPIO_FORWARDER");
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static int gpiochip_fwd_register(struct gpiochip_fwd *fwd)
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/**
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* gpiochip_fwd_register - Register a GPIO forwarder
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* @fwd: GPIO forwarder
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*
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* Returns: 0 on success, or negative errno on failure.
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*/
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int gpiochip_fwd_register(struct gpiochip_fwd *fwd)
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{
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struct gpio_chip *chip = &fwd->chip;
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@ -549,6 +738,7 @@ static int gpiochip_fwd_register(struct gpiochip_fwd *fwd)
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return devm_gpiochip_add_data(chip->parent, chip, fwd);
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}
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EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_register, "GPIO_FORWARDER");
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/**
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* gpiochip_fwd_create() - Create a new GPIO forwarder
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37
include/linux/gpio/forwarder.h
Normal file
37
include/linux/gpio/forwarder.h
Normal file
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@ -0,0 +1,37 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_GPIO_FORWARDER_H
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#define __LINUX_GPIO_FORWARDER_H
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struct gpio_desc;
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struct gpio_chip;
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struct gpiochip_fwd;
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struct gpiochip_fwd *devm_gpiochip_fwd_alloc(struct device *dev,
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unsigned int ngpios);
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int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd,
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struct gpio_desc *desc, unsigned int offset);
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int gpiochip_fwd_register(struct gpiochip_fwd *fwd);
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struct gpio_chip *gpiochip_fwd_get_gpiochip(struct gpiochip_fwd *fwd);
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int gpiochip_fwd_gpio_get_direction(struct gpiochip_fwd *fwd,
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unsigned int offset);
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int gpiochip_fwd_gpio_direction_input(struct gpiochip_fwd *fwd,
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unsigned int offset);
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int gpiochip_fwd_gpio_direction_output(struct gpiochip_fwd *fwd,
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unsigned int offset,
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int value);
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int gpiochip_fwd_gpio_get(struct gpiochip_fwd *fwd, unsigned int offset);
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int gpiochip_fwd_gpio_get_multiple(struct gpiochip_fwd *fwd,
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unsigned long *mask,
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unsigned long *bits);
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int gpiochip_fwd_gpio_set(struct gpiochip_fwd *fwd, unsigned int offset,
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int value);
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int gpiochip_fwd_gpio_set_multiple(struct gpiochip_fwd *fwd,
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unsigned long *mask,
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unsigned long *bits);
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int gpiochip_fwd_gpio_set_config(struct gpiochip_fwd *fwd, unsigned int offset,
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unsigned long config);
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int gpiochip_fwd_gpio_to_irq(struct gpiochip_fwd *fwd, unsigned int offset);
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#endif
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