int irq, ret;

unsigned long irqflags;

// 配置中断

drvdata->gpio = devm_gpiod_get(&pdev->dev, NULL, GPIOD_IN);

if (IS_ERR(drvdata->gpio)) {

    dev_err(&pdev->dev, "failed to request GPIO\n");

    return PTR_ERR(drvdata->gpio);

}

irq = gpiod_to_irq(drvdata->gpio);

irqflags = gpiod_is_active_low(drvdata->gpio) ? IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING;

ret = devm_request_irq(&pdev->dev, irq, system_power_irq_handler, irqflags, "system_power", drvdata);

if (ret != 0) {

    dev_err(&pdev->dev, "failed to request irq\n");

    return ret;

}