linux/drivers/leds/leds-netxbig.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * leds-netxbig.c - Driver for the 2Big and 5Big Network series LEDs
 *
 * Copyright (C) 2010 LaCie
 *
 * Author: Simon Guinot <[email protected]>
 */

#include <linux/module.h>
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
#include <linux/leds.h>
#include <linux/of.h>
#include <linux/of_platform.h>

struct netxbig_gpio_ext { … };

enum netxbig_led_mode { … };

#define NETXBIG_LED_INVALID_MODE …

struct netxbig_led_timer { … };

struct netxbig_led { … };

struct netxbig_led_platform_data { … };

/*
 * GPIO extension bus.
 */

static DEFINE_SPINLOCK(gpio_ext_lock);

static void gpio_ext_set_addr(struct netxbig_gpio_ext *gpio_ext, int addr)
{ … }

static void gpio_ext_set_data(struct netxbig_gpio_ext *gpio_ext, int data)
{ … }

static void gpio_ext_enable_select(struct netxbig_gpio_ext *gpio_ext)
{ … }

static void gpio_ext_set_value(struct netxbig_gpio_ext *gpio_ext,
			       int addr, int value)
{ … }

/*
 * Class LED driver.
 */

struct netxbig_led_data { … };

static int netxbig_led_get_timer_mode(enum netxbig_led_mode *mode,
				      unsigned long delay_on,
				      unsigned long delay_off,
				      struct netxbig_led_timer *timer,
				      int num_timer)
{ … }

static int netxbig_led_blink_set(struct led_classdev *led_cdev,
				 unsigned long *delay_on,
				 unsigned long *delay_off)
{ … }

static void netxbig_led_set(struct led_classdev *led_cdev,
			    enum led_brightness value)
{ … }

static ssize_t sata_store(struct device *dev,
			  struct device_attribute *attr,
			  const char *buff, size_t count)
{ … }

static ssize_t sata_show(struct device *dev,
			 struct device_attribute *attr, char *buf)
{ … }

static DEVICE_ATTR_RW(sata);

static struct attribute *netxbig_led_attrs[] = …;
ATTRIBUTE_GROUPS(…);

static int create_netxbig_led(struct platform_device *pdev,
			      struct netxbig_led_platform_data *pdata,
			      struct netxbig_led_data *led_dat,
			      const struct netxbig_led *template)
{ … }

/**
 * netxbig_gpio_ext_remove() - Clean up GPIO extension data
 * @data: managed resource data to clean up
 *
 * Since we pick GPIO descriptors from another device than the device our
 * driver is probing to, we need to register a specific callback to free
 * these up using managed resources.
 */
static void netxbig_gpio_ext_remove(void *data)
{ … }

/**
 * netxbig_gpio_ext_get() - Obtain GPIO extension device data
 * @dev: main LED device
 * @gpio_ext_dev: the GPIO extension device
 * @gpio_ext: the data structure holding the GPIO extension data
 *
 * This function walks the subdevice that only contain GPIO line
 * handles in the device tree and obtains the GPIO descriptors from that
 * device.
 */
static int netxbig_gpio_ext_get(struct device *dev,
				struct device *gpio_ext_dev,
				struct netxbig_gpio_ext *gpio_ext)
{ … }

static int netxbig_leds_get_of_pdata(struct device *dev,
				     struct netxbig_led_platform_data *pdata)
{ … }

static const struct of_device_id of_netxbig_leds_match[] = …;
MODULE_DEVICE_TABLE(of, of_netxbig_leds_match);

static int netxbig_led_probe(struct platform_device *pdev)
{ … }

static struct platform_driver netxbig_led_driver = …;

module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_ALIAS(…) …;