Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / rtc / rtc-generic.c

diff --git a/kernel/drivers/rtc/rtc-generic.c b/kernel/drivers/rtc/rtc-generic.c
new file mode 100644 (file)
index 0000000..e782ebd
--- /dev/null
+++ b/kernel/drivers/rtc/rtc-generic.c
@@ -0,0 +1,62 @@
+/* rtc-generic: RTC driver using the generic RTC abstraction
+ *
+ * Copyright (C) 2008 Kyle McMartin <kyle@mcmartin.ca>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+
+#include <asm/rtc.h>
+
+static int generic_get_time(struct device *dev, struct rtc_time *tm)
+{
+       unsigned int ret = get_rtc_time(tm);
+
+       if (ret & RTC_BATT_BAD)
+               return -EOPNOTSUPP;
+
+       return rtc_valid_tm(tm);
+}
+
+static int generic_set_time(struct device *dev, struct rtc_time *tm)
+{
+       if (set_rtc_time(tm) < 0)
+               return -EOPNOTSUPP;
+
+       return 0;
+}
+
+static const struct rtc_class_ops generic_rtc_ops = {
+       .read_time = generic_get_time,
+       .set_time = generic_set_time,
+};
+
+static int __init generic_rtc_probe(struct platform_device *dev)
+{
+       struct rtc_device *rtc;
+
+       rtc = devm_rtc_device_register(&dev->dev, "rtc-generic",
+                                       &generic_rtc_ops, THIS_MODULE);
+       if (IS_ERR(rtc))
+               return PTR_ERR(rtc);
+
+       platform_set_drvdata(dev, rtc);
+
+       return 0;
+}
+
+static struct platform_driver generic_rtc_driver = {
+       .driver = {
+               .name = "rtc-generic",
+       },
+};
+
+module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe);
+
+MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Generic RTC driver");
+MODULE_ALIAS("platform:rtc-generic");