73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/* rtc-generic: RTC driver using the generic RTC abstraction
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*
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* Copyright (C) 2008 Kyle McMartin <kyle@mcmartin.ca>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/time.h>
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#include <linux/platform_device.h>
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#include <linux/rtc.h>
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#if defined(CONFIG_M68K) || defined(CONFIG_PARISC) || \
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defined(CONFIG_PPC) || defined(CONFIG_SUPERH32)
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#include <asm/rtc.h>
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static int generic_get_time(struct device *dev, struct rtc_time *tm)
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{
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unsigned int ret = get_rtc_time(tm);
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if (ret & RTC_BATT_BAD)
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return -EOPNOTSUPP;
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return rtc_valid_tm(tm);
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}
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static int generic_set_time(struct device *dev, struct rtc_time *tm)
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{
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if (set_rtc_time(tm) < 0)
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return -EOPNOTSUPP;
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return 0;
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}
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static const struct rtc_class_ops generic_rtc_ops = {
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.read_time = generic_get_time,
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.set_time = generic_set_time,
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};
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#else
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#define generic_rtc_ops *(struct rtc_class_ops*)NULL
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#endif
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static int __init generic_rtc_probe(struct platform_device *dev)
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{
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struct rtc_device *rtc;
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const struct rtc_class_ops *ops;
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ops = dev_get_platdata(&dev->dev);
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if (!ops)
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ops = &generic_rtc_ops;
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rtc = devm_rtc_device_register(&dev->dev, "rtc-generic",
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ops, THIS_MODULE);
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if (IS_ERR(rtc))
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return PTR_ERR(rtc);
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platform_set_drvdata(dev, rtc);
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return 0;
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}
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static struct platform_driver generic_rtc_driver = {
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.driver = {
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.name = "rtc-generic",
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},
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};
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module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe);
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MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Generic RTC driver");
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MODULE_ALIAS("platform:rtc-generic");
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