static void pn547_disable_irq(struct pn547_dev *pn547_dev)
{
unsigned long flags;
spin_lock_irqsave(&pn547_dev->irq_enabled_lock, flags);
if (pn547_dev->irq_enabled) {
disable_irq_nosync(pn547_get_irq_pin(pn547_dev));
disable_irq_wake(pn547_get_irq_pin(pn547_dev));
pn547_dev->irq_enabled = false;
}
spin_unlock_irqrestore(&pn547_dev->irq_enabled_lock, flags);
}
static void pn547_disable_irq(struct pn547_dev *pn547_dev)
{
unsigned long flags;
spin_lock_irqsave(&pn547_dev->irq_enabled_lock, flags);
if (pn547_dev->irq_enabled) {
disable_irq_nosync(pn547_get_irq_pin(pn547_dev));
disable_irq_wake(pn547_get_irq_pin(pn547_dev));
pn547_dev->irq_enabled = false;
pr_debug(PN547_DRV_NAME ":%s disable IRQ\n", __func__);
}
else {
pr_debug("%s IRQ is already disabled!\n", __func__);
}
spin_unlock_irqrestore(&pn547_dev->irq_enabled_lock, flags);
}
static int pn547_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
struct pn547_dev *pn547_dev = NULL;
pn547_client = client;
pr_info(PN547_DRV_NAME ": pn547_probe() start\n");
pn547_dev = kzalloc(sizeof(*pn547_dev), GFP_KERNEL);
if (pn547_dev == NULL) {
dev_err(&client->dev,
"failed to allocate memory for module data\n");
ret = -ENOMEM;
goto err_exit;
}
pn547_parse_dt(&client->dev, pn547_dev);
pn547_dev->client = client;
pr_info(PN547_DRV_NAME ":IRQ : %d\nVEN : %d\nFIRM : %d\n",
pn547_dev->irq_gpio, pn547_dev->ven_gpio, pn547_dev->firm_gpio);
ret = gpio_request(pn547_dev->irq_gpio, "nfc_int");
if (ret) {
pr_info(PN547_DRV_NAME ":pn547_probe() : nfc_int request failed!\n");
goto err_int;
}
ret = gpio_request(pn547_dev->ven_gpio, "nfc_ven");
if (ret) {
pr_info(PN547_DRV_NAME ":pn547_probe() : nfc_ven request failed!\n");
goto err_ven;
}
ret = gpio_request(pn547_dev->firm_gpio, "nfc_firm");
if (ret) {
pr_info(PN547_DRV_NAME ":pn547_probe() : nfc_firm request failed!\n");
goto err_firm;
}
pn547_gpio_enable(pn547_dev);
ret = gpio_direction_output(pn547_dev->ven_gpio,0);
ret = gpio_direction_output(pn547_dev->firm_gpio,0);
ret = gpio_direction_input(pn547_dev->irq_gpio);
#ifdef CONFIG_LGE_NFC_USE_PMIC
pn547_get_clk_source(pn547_client, pn547_dev);
#endif
/* init mutex and queues */
init_waitqueue_head(&pn547_dev->read_wq);
mutex_init(&pn547_dev->read_mutex);
spin_lock_init(&pn547_dev->irq_enabled_lock);
pn547_dev->pn547_device.minor = MISC_DYNAMIC_MINOR;
pn547_dev->pn547_device.name = PN547_DRV_NAME;
pn547_dev->pn547_device.fops = &pn547_dev_fops;
ret = misc_register(&pn547_dev->pn547_device);
if (ret) {
pr_err("%s : misc_register failed\n", __FILE__);
goto err_misc_register;
}
wake_lock_init(&nfc_wake_lock, WAKE_LOCK_SUSPEND, "NFCWAKE");
/* request irq. the irq is set whenever the chip has data available
* for reading. it is cleared when all data has been read.
*/
pr_info("%s : requesting IRQ %d\n", __func__, client->irq);
pn547_dev->irq_enabled = true;
ret = request_irq(pn547_gpio_to_irq(pn547_dev), pn547_dev_irq_handler,
IRQF_TRIGGER_RISING|IRQF_NO_SUSPEND, client->name, pn547_dev);
if (ret) {
dev_err(&client->dev, "request_irq failed\n");
goto err_request_irq_failed;
}
enable_irq_wake(pn547_get_irq_pin(pn547_dev));
pn547_disable_irq(pn547_dev);
i2c_set_clientdata(client, pn547_dev);
pr_info(PN547_DRV_NAME ": pn547_probe() end\n");
return 0;
err_request_irq_failed:
misc_deregister(&pn547_dev->pn547_device);
err_misc_register:
mutex_destroy(&pn547_dev->read_mutex);
gpio_free(pn547_dev->firm_gpio);
err_firm:
gpio_free(pn547_dev->ven_gpio);
err_ven:
gpio_free(pn547_dev->irq_gpio);
err_int:
kfree(pn547_dev);
err_exit:
pr_err(PN547_DRV_NAME ": pn547_dev is null\n");
pr_err(PN547_DRV_NAME ": pn547_probe() end with error!\n");
return ret;
}