Source of rtc-pl030.c - linux-imx - PHYTEC BitBucket (Stash)

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    ret = amba_request_regions(dev, NULL);
    if (ret)
        goto err_req;
​
    rtc = devm_kzalloc(&dev->dev, sizeof(*rtc), GFP_KERNEL);
    if (!rtc) {
        ret = -ENOMEM;
        goto err_rtc;
    }
​
    rtc->rtc = devm_rtc_allocate_device(&dev->dev);
    if (IS_ERR(rtc->rtc)) {
        ret = PTR_ERR(rtc->rtc);
        goto err_rtc;
    }
​
    rtc->rtc->ops = &pl030_ops;
    rtc->base = ioremap(dev->res.start, resource_size(&dev->res));
    if (!rtc->base) {
        ret = -ENOMEM;
        goto err_rtc;
    }
​
    __raw_writel(0, rtc->base + RTC_CR);
    __raw_writel(0, rtc->base + RTC_EOI);
​
    amba_set_drvdata(dev, rtc);
​
    ret = request_irq(dev->irq[0], pl030_interrupt, 0,
              "rtc-pl030", rtc);
    if (ret)
        goto err_irq;
​
    rtc->rtc = rtc_device_register("pl030", &dev->dev, &pl030_ops,
                       THIS_MODULE);
    if (IS_ERR(rtc->rtc)) {
        ret = PTR_ERR(rtc->rtc);
    ret = rtc_register_device(rtc->rtc);
    if (ret)
        goto err_reg;
    }
​
    return 0;
​
 err_reg:
    free_irq(dev->irq[0], rtc);
 err_irq:
    iounmap(rtc->base);
 err_rtc:
    amba_release_regions(dev);
 err_req:
    return ret;
}
​
static int pl030_remove(struct amba_device *dev)
{
    struct pl030_rtc *rtc = amba_get_drvdata(dev);
​
    writel(0, rtc->base + RTC_CR);
​
    free_irq(dev->irq[0], rtc);
    rtc_device_unregister(rtc->rtc);
    iounmap(rtc->base);
    amba_release_regions(dev);
​
    return 0;
}
​
static struct amba_id pl030_ids[] = {
    {
        .id = 0x00041030,
        .mask   = 0x000fffff,