On Wednesday 23 July 2014 08:08 PM, Chen-Yu Tsai wrote:
This patch introduces the driver for the RTC in the Allwinner A31 and
A23 SoCs.
Unlike the RTC found in A10/A20 SoCs, which was part of the timer, the
RTC in A31/A23 are a separate hardware block, which also contain a few
controls for the RTC block hardware (a regulator and RTC block GPIO pin
latches), while also having separate interrupts for the alarms.
The hardware is different enough to make a different driver for it.
(...)
+Required properties:
+- compatible : Should be "allwinner,sun6i-a31-rtc"
+- reg: physical base address of the controller and length of memory mapped
+ region.
+- interrupts: IRQ line for the RTC alarm 0.
+
proper indentation..
- compatible : Should be "allwinner,sun6i-a31-rtc"
- reg : physical base address of the controller and length of memory
mapped
region.
- interrupts : IRQ line for the RTC alarm 0.
....
+Example:
+
(...)
+
+ ret = devm_request_irq(&pdev->dev, chip->irq, sun6i_rtc_alarmirq,
+ 0, dev_name(&pdev->dev), chip);
should match open parenthesis...
devm_request_irq(&pdev->dev, chip->irq, sun6i_rtc_alarmirq,
0, dev_name(&pdev->dev), chip);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not request IRQ\n");
+ return ret;
+ }
+
+ /* clear the alarm counter value */
+ writel(0, chip->base + SUN6I_ALRM_COUNTER);
+
+ /* disable counter alarm */
+ writel(0, chip->base + SUN6I_ALRM_EN);
+
+ /* disable counter alarm interrupt */
+ writel(0, chip->base + SUN6I_ALRM_IRQ_EN);
+
+ /* disable week alarm */
+ writel(0, chip->base + SUN6I_ALRM1_EN);
+
+ /* disable week alarm interrupt */
+ writel(0, chip->base + SUN6I_ALRM1_IRQ_EN);
+
+ /* clear counter alarm pending interrupts */
+ writel(SUN6I_ALRM_IRQ_STA_CNT_IRQ_PEND, chip->base +
+ SUN6I_ALRM_IRQ_STA);
+
+ /* clear week alarm pending interrupts */
+ writel(SUN6I_ALRM1_IRQ_STA_WEEK_IRQ_PEND, chip->base +
+ SUN6I_ALRM1_IRQ_STA);
+
+ /* disable alarm wakeup */
+ writel(0, chip->base + SUN6I_ALARM_CONFIG);
+
+ chip->rtc = rtc_device_register("rtc-sun6i", &pdev->dev,
+ &sun6i_rtc_ops, THIS_MODULE);
dto....
+ if (IS_ERR(chip->rtc)) {
+ dev_err(&pdev->dev, "unable to register device\n");
+ return PTR_ERR(chip->rtc);
+ }
+
+ dev_info(&pdev->dev, "RTC enabled\n");
+
+ return 0;
+}
+
+static int sun6i_rtc_remove(struct platform_device *pdev)
+{
+ struct sun6i_rtc_dev *chip = platform_get_drvdata(pdev);
+
+ rtc_device_unregister(chip->rtc);
+
+ return 0;
+}
+
+static const struct of_device_id sun6i_rtc_dt_ids[] = {
+ { .compatible = "allwinner,sun6i-a31-rtc" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sun6i_rtc_dt_ids);
+
+static struct platform_driver sun6i_rtc_driver = {
+ .probe = sun6i_rtc_probe,
+ .remove = sun6i_rtc_remove,
+ .driver = {
+ .name = "sun6i-rtc",
+ .owner = THIS_MODULE,
we can drop owner field....
+ .of_match_table = sun6i_rtc_dt_ids,
+ },
+};
+
+module_platform_driver(sun6i_rtc_driver);
+
+MODULE_DESCRIPTION("sun6i RTC driver");
+MODULE_AUTHOR("Chen-Yu Tsai <w...@csie.org>");
+MODULE_LICENSE("GPL");
--
-Varka Bhadram
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