linux/drivers/extcon/extcon-palmas.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Palmas USB transceiver driver
 *
 * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com
 * Author: Graeme Gregory <[email protected]>
 * Author: Kishon Vijay Abraham I <[email protected]>
 * Based on twl6030_usb.c
 * Author: Hema HK <[email protected]>
 */

#include <linux/devm-helpers.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/mfd/palmas.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/gpio/consumer.h>
#include <linux/workqueue.h>

#define USB_GPIO_DEBOUNCE_MS …

static const unsigned int palmas_extcon_cable[] = …;

static void palmas_usb_wakeup(struct palmas *palmas, int enable)
{ … }

static irqreturn_t palmas_vbus_irq_handler(int irq, void *_palmas_usb)
{ … }

static irqreturn_t palmas_id_irq_handler(int irq, void *_palmas_usb)
{ … }

static void palmas_gpio_id_detect(struct work_struct *work)
{ … }

static irqreturn_t palmas_gpio_id_irq_handler(int irq, void *_palmas_usb)
{ … }

static void palmas_enable_irq(struct palmas_usb *palmas_usb)
{ … }

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

#ifdef CONFIG_PM_SLEEP
static int palmas_usb_suspend(struct device *dev)
{ … }

static int palmas_usb_resume(struct device *dev)
{
	struct palmas_usb *palmas_usb = dev_get_drvdata(dev);

	if (device_may_wakeup(dev)) {
		if (palmas_usb->enable_vbus_detection)
			disable_irq_wake(palmas_usb->vbus_irq);
		if (palmas_usb->enable_gpio_vbus_detection)
			disable_irq_wake(palmas_usb->gpio_vbus_irq);
		if (palmas_usb->enable_id_detection)
			disable_irq_wake(palmas_usb->id_irq);
		if (palmas_usb->enable_gpio_id_detection)
			disable_irq_wake(palmas_usb->gpio_id_irq);
	}

	/* check if GPIO states changed while suspend/resume */
	if (palmas_usb->enable_gpio_vbus_detection)
		palmas_vbus_irq_handler(palmas_usb->gpio_vbus_irq, palmas_usb);
	palmas_gpio_id_detect(&palmas_usb->wq_detectid.work);

	return 0;
};
#endif

static SIMPLE_DEV_PM_OPS(palmas_pm_ops, palmas_usb_suspend, palmas_usb_resume);

static const struct of_device_id of_palmas_match_tbl[] = …;

static struct platform_driver palmas_usb_driver = …;

module_platform_driver(…) …;

MODULE_ALIAS(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);