Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/drivers/rtc/rtc-starfire.c b/kernel/drivers/rtc/rtc-starfire.c
new file mode 100644 (file)
index 0000000..83a057a
--- /dev/null
+++ b/kernel/drivers/rtc/rtc-starfire.c
@@ -0,0 +1,60 @@
+/* rtc-starfire.c: Starfire platform RTC driver.
+ *
+ * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/rtc.h>
+#include <linux/platform_device.h>
+
+#include <asm/oplib.h>
+
+MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
+MODULE_DESCRIPTION("Starfire RTC driver");
+MODULE_LICENSE("GPL");
+
+static u32 starfire_get_time(void)
+{
+       static char obp_gettod[32];
+       static u32 unix_tod;
+
+       sprintf(obp_gettod, "h# %08x unix-gettod",
+               (unsigned int) (long) &unix_tod);
+       prom_feval(obp_gettod);
+
+       return unix_tod;
+}
+
+static int starfire_read_time(struct device *dev, struct rtc_time *tm)
+{
+       rtc_time_to_tm(starfire_get_time(), tm);
+       return rtc_valid_tm(tm);
+}
+
+static const struct rtc_class_ops starfire_rtc_ops = {
+       .read_time      = starfire_read_time,
+};
+
+static int __init starfire_rtc_probe(struct platform_device *pdev)
+{
+       struct rtc_device *rtc;
+
+       rtc = devm_rtc_device_register(&pdev->dev, "starfire",
+                               &starfire_rtc_ops, THIS_MODULE);
+       if (IS_ERR(rtc))
+               return PTR_ERR(rtc);
+
+       platform_set_drvdata(pdev, rtc);
+
+       return 0;
+}
+
+static struct platform_driver starfire_rtc_driver = {
+       .driver         = {
+               .name   = "rtc-starfire",
+       },
+};
+
+module_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe);