Merge branch 'omap-pool'

[linux-2.6-omap-h63xx.git] / drivers / rtc / rtc-ps3.c

diff --git a/drivers/rtc/rtc-ps3.c b/drivers/rtc/rtc-ps3.c
new file mode 100644 (file)
index 0000000..968133c
--- /dev/null
+++ b/drivers/rtc/rtc-ps3.c
@@ -0,0 +1,104 @@
+/*
+ * PS3 RTC Driver
+ *
+ * Copyright 2009 Sony Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+
+#include <asm/lv1call.h>
+#include <asm/ps3.h>
+
+
+static u64 read_rtc(void)
+{
+       int result;
+       u64 rtc_val;
+       u64 tb_val;
+
+       result = lv1_get_rtc(&rtc_val, &tb_val);
+       BUG_ON(result);
+
+       return rtc_val;
+}
+
+static int ps3_get_time(struct device *dev, struct rtc_time *tm)
+{
+       rtc_time_to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
+       return rtc_valid_tm(tm);
+}
+
+static int ps3_set_time(struct device *dev, struct rtc_time *tm)
+{
+       unsigned long now;
+
+       rtc_tm_to_time(tm, &now);
+       ps3_os_area_set_rtc_diff(now - read_rtc());
+       return 0;
+}
+
+static const struct rtc_class_ops ps3_rtc_ops = {
+       .read_time = ps3_get_time,
+       .set_time = ps3_set_time,
+};
+
+static int __init ps3_rtc_probe(struct platform_device *dev)
+{
+       struct rtc_device *rtc;
+
+       rtc = rtc_device_register("rtc-ps3", &dev->dev, &ps3_rtc_ops,
+                                 THIS_MODULE);
+       if (IS_ERR(rtc))
+               return PTR_ERR(rtc);
+
+       platform_set_drvdata(dev, rtc);
+       return 0;
+}
+
+static int __exit ps3_rtc_remove(struct platform_device *dev)
+{
+       rtc_device_unregister(platform_get_drvdata(dev));
+       return 0;
+}
+
+static struct platform_driver ps3_rtc_driver = {
+       .driver = {
+               .name = "rtc-ps3",
+               .owner = THIS_MODULE,
+       },
+       .remove = __exit_p(ps3_rtc_remove),
+};
+
+static int __init ps3_rtc_init(void)
+{
+       return platform_driver_probe(&ps3_rtc_driver, ps3_rtc_probe);
+}
+
+static void __exit ps3_rtc_fini(void)
+{
+       platform_driver_unregister(&ps3_rtc_driver);
+}
+
+module_init(ps3_rtc_init);
+module_exit(ps3_rtc_fini);
+
+MODULE_AUTHOR("Sony Corporation");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ps3 RTC driver");
+MODULE_ALIAS("platform:rtc-ps3");