// SPDX-License-Identifier: GPL-2.0-or-later /* * GPIO testing driver based on configfs. * * Copyright (C) 2021 Bartosz Golaszewski <[email protected]> */ #define pr_fmt(fmt) … #include <linux/array_size.h> #include <linux/bitmap.h> #include <linux/cleanup.h> #include <linux/completion.h> #include <linux/configfs.h> #include <linux/device.h> #include <linux/err.h> #include <linux/gpio/consumer.h> #include <linux/gpio/driver.h> #include <linux/gpio/machine.h> #include <linux/idr.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/irq_sim.h> #include <linux/list.h> #include <linux/lockdep.h> #include <linux/minmax.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/notifier.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/string_helpers.h> #include <linux/sysfs.h> #include <linux/types.h> #define GPIO_SIM_NGPIO_MAX … #define GPIO_SIM_PROP_MAX … #define GPIO_SIM_NUM_ATTRS … static DEFINE_IDA(gpio_sim_ida); struct gpio_sim_chip { … }; struct gpio_sim_attribute { … }; static struct gpio_sim_attribute * to_gpio_sim_attr(struct device_attribute *dev_attr) { … } static int gpio_sim_apply_pull(struct gpio_sim_chip *chip, unsigned int offset, int value) { … } static int gpio_sim_get(struct gpio_chip *gc, unsigned int offset) { … } static void gpio_sim_set(struct gpio_chip *gc, unsigned int offset, int value) { … } static int gpio_sim_get_multiple(struct gpio_chip *gc, unsigned long *mask, unsigned long *bits) { … } static void gpio_sim_set_multiple(struct gpio_chip *gc, unsigned long *mask, unsigned long *bits) { … } static int gpio_sim_direction_output(struct gpio_chip *gc, unsigned int offset, int value) { … } static int gpio_sim_direction_input(struct gpio_chip *gc, unsigned int offset) { … } static int gpio_sim_get_direction(struct gpio_chip *gc, unsigned int offset) { … } static int gpio_sim_set_config(struct gpio_chip *gc, unsigned int offset, unsigned long config) { … } static int gpio_sim_to_irq(struct gpio_chip *gc, unsigned int offset) { … } static int gpio_sim_request(struct gpio_chip *gc, unsigned int offset) { … } static void gpio_sim_free(struct gpio_chip *gc, unsigned int offset) { … } static int gpio_sim_irq_requested(struct irq_domain *domain, irq_hw_number_t hwirq, void *data) { … } static void gpio_sim_irq_released(struct irq_domain *domain, irq_hw_number_t hwirq, void *data) { … } static const struct irq_sim_ops gpio_sim_irq_sim_ops = …; static void gpio_sim_dbg_show(struct seq_file *seq, struct gpio_chip *gc) { … } static ssize_t gpio_sim_sysfs_val_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t gpio_sim_sysfs_val_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static const char *const gpio_sim_sysfs_pull_strings[] = …; static ssize_t gpio_sim_sysfs_pull_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t gpio_sim_sysfs_pull_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static void gpio_sim_put_device(void *data) { … } static void gpio_sim_dispose_mappings(void *data) { … } static void gpio_sim_sysfs_remove(void *data) { … } static int gpio_sim_setup_sysfs(struct gpio_sim_chip *chip) { … } static int gpio_sim_dev_match_fwnode(struct device *dev, void *data) { … } static int gpio_sim_add_bank(struct fwnode_handle *swnode, struct device *dev) { … } static int gpio_sim_probe(struct platform_device *pdev) { … } static const struct of_device_id gpio_sim_of_match[] = …; MODULE_DEVICE_TABLE(of, gpio_sim_of_match); static struct platform_driver gpio_sim_driver = …; struct gpio_sim_device { … }; /* This is called with dev->lock already taken. */ static int gpio_sim_bus_notifier_call(struct notifier_block *nb, unsigned long action, void *data) { … } static struct gpio_sim_device *to_gpio_sim_device(struct config_item *item) { … } struct gpio_sim_bank { … }; static struct gpio_sim_bank *to_gpio_sim_bank(struct config_item *item) { … } static bool gpio_sim_bank_has_label(struct gpio_sim_bank *bank) { … } static struct gpio_sim_device * gpio_sim_bank_get_device(struct gpio_sim_bank *bank) { … } struct gpio_sim_hog; struct gpio_sim_line { … }; static struct gpio_sim_line *to_gpio_sim_line(struct config_item *item) { … } static struct gpio_sim_device * gpio_sim_line_get_device(struct gpio_sim_line *line) { … } struct gpio_sim_hog { … }; static struct gpio_sim_hog *to_gpio_sim_hog(struct config_item *item) { … } static struct gpio_sim_device *gpio_sim_hog_get_device(struct gpio_sim_hog *hog) { … } static bool gpio_sim_device_is_live(struct gpio_sim_device *dev) { … } static char *gpio_sim_strdup_trimmed(const char *str, size_t count) { … } static ssize_t gpio_sim_device_config_dev_name_show(struct config_item *item, char *page) { … } CONFIGFS_ATTR_RO(…); static ssize_t gpio_sim_device_config_live_show(struct config_item *item, char *page) { … } static unsigned int gpio_sim_get_line_names_size(struct gpio_sim_bank *bank) { … } static void gpio_sim_set_line_names(struct gpio_sim_bank *bank, char **line_names) { … } static void gpio_sim_remove_hogs(struct gpio_sim_device *dev) { … } static int gpio_sim_add_hogs(struct gpio_sim_device *dev) { … } static struct fwnode_handle * gpio_sim_make_bank_swnode(struct gpio_sim_bank *bank, struct fwnode_handle *parent) { … } static void gpio_sim_remove_swnode_recursive(struct fwnode_handle *swnode) { … } static bool gpio_sim_bank_labels_non_unique(struct gpio_sim_device *dev) { … } static int gpio_sim_device_activate(struct gpio_sim_device *dev) { … } static void gpio_sim_device_deactivate(struct gpio_sim_device *dev) { … } static ssize_t gpio_sim_device_config_live_store(struct config_item *item, const char *page, size_t count) { … } CONFIGFS_ATTR(…); static struct configfs_attribute *gpio_sim_device_config_attrs[] = …; struct gpio_sim_chip_name_ctx { … }; static int gpio_sim_emit_chip_name(struct device *dev, void *data) { … } static ssize_t gpio_sim_bank_config_chip_name_show(struct config_item *item, char *page) { … } CONFIGFS_ATTR_RO(…); static ssize_t gpio_sim_bank_config_label_show(struct config_item *item, char *page) { … } static ssize_t gpio_sim_bank_config_label_store(struct config_item *item, const char *page, size_t count) { … } CONFIGFS_ATTR(…); static ssize_t gpio_sim_bank_config_num_lines_show(struct config_item *item, char *page) { … } static ssize_t gpio_sim_bank_config_num_lines_store(struct config_item *item, const char *page, size_t count) { … } CONFIGFS_ATTR(…); static struct configfs_attribute *gpio_sim_bank_config_attrs[] = …; static ssize_t gpio_sim_line_config_name_show(struct config_item *item, char *page) { … } static ssize_t gpio_sim_line_config_name_store(struct config_item *item, const char *page, size_t count) { … } CONFIGFS_ATTR(…); static struct configfs_attribute *gpio_sim_line_config_attrs[] = …; static ssize_t gpio_sim_hog_config_name_show(struct config_item *item, char *page) { … } static ssize_t gpio_sim_hog_config_name_store(struct config_item *item, const char *page, size_t count) { … } CONFIGFS_ATTR(…); static ssize_t gpio_sim_hog_config_direction_show(struct config_item *item, char *page) { … } static ssize_t gpio_sim_hog_config_direction_store(struct config_item *item, const char *page, size_t count) { … } CONFIGFS_ATTR(…); static struct configfs_attribute *gpio_sim_hog_config_attrs[] = …; static void gpio_sim_hog_config_item_release(struct config_item *item) { … } static struct configfs_item_operations gpio_sim_hog_config_item_ops = …; static const struct config_item_type gpio_sim_hog_config_type = …; static struct config_item * gpio_sim_line_config_make_hog_item(struct config_group *group, const char *name) { … } static void gpio_sim_line_config_group_release(struct config_item *item) { … } static struct configfs_item_operations gpio_sim_line_config_item_ops = …; static struct configfs_group_operations gpio_sim_line_config_group_ops = …; static const struct config_item_type gpio_sim_line_config_type = …; static struct config_group * gpio_sim_bank_config_make_line_group(struct config_group *group, const char *name) { … } static void gpio_sim_bank_config_group_release(struct config_item *item) { … } static struct configfs_item_operations gpio_sim_bank_config_item_ops = …; static struct configfs_group_operations gpio_sim_bank_config_group_ops = …; static const struct config_item_type gpio_sim_bank_config_group_type = …; static struct config_group * gpio_sim_device_config_make_bank_group(struct config_group *group, const char *name) { … } static void gpio_sim_device_config_group_release(struct config_item *item) { … } static struct configfs_item_operations gpio_sim_device_config_item_ops = …; static struct configfs_group_operations gpio_sim_device_config_group_ops = …; static const struct config_item_type gpio_sim_device_config_group_type = …; static struct config_group * gpio_sim_config_make_device_group(struct config_group *group, const char *name) { … } static struct configfs_group_operations gpio_sim_config_group_ops = …; static const struct config_item_type gpio_sim_config_type = …; static struct configfs_subsystem gpio_sim_config_subsys = …; static int __init gpio_sim_init(void) { … } module_init(…) …; static void __exit gpio_sim_exit(void) { … } module_exit(gpio_sim_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux