Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszer...

[cascardo/linux.git] / arch / parisc / kernel / time.c

diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 31ec99a..4b0b963 100644 (file)
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -12,6 +12,7 @@
  */
 #include <linux/errno.h>
 #include <linux/module.h>
+#include <linux/rtc.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/param.h>
@@ -220,18 +221,6 @@ static struct clocksource clocksource_cr16 = {
        .flags                  = CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
-int update_cr16_clocksource(void)
-{
-       /* since the cr16 cycle counters are not synchronized across CPUs,
-          we'll check if we should switch to a safe clocksource: */
-       if (clocksource_cr16.rating != 0 && num_online_cpus() > 1) {
-               clocksource_change_rating(&clocksource_cr16, 0);
-               return 1;
-       }
-
-       return 0;
-}
-
 void __init start_cpu_itimer(void)
 {
        unsigned int cpu = smp_processor_id();
@@ -248,14 +237,47 @@ void __init start_cpu_itimer(void)
        per_cpu(cpu_data, cpu).it_value = next_tick;
 }
 
+#if IS_ENABLED(CONFIG_RTC_DRV_GENERIC)
+static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm)
+{
+       struct pdc_tod tod_data;
+
+       memset(tm, 0, sizeof(*tm));
+       if (pdc_tod_read(&tod_data) < 0)
+               return -EOPNOTSUPP;
+
+       /* we treat tod_sec as unsigned, so this can work until year 2106 */
+       rtc_time64_to_tm(tod_data.tod_sec, tm);
+       return rtc_valid_tm(tm);
+}
+
+static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm)
+{
+       time64_t secs = rtc_tm_to_time64(tm);
+
+       if (pdc_tod_set(secs, 0) < 0)
+               return -EOPNOTSUPP;
+
+       return 0;
+}
+
+static const struct rtc_class_ops rtc_generic_ops = {
+       .read_time = rtc_generic_get_time,
+       .set_time = rtc_generic_set_time,
+};
+
 static int __init rtc_init(void)
 {
        struct platform_device *pdev;
 
-       pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
+       pdev = platform_device_register_data(NULL, "rtc-generic", -1,
+                                            &rtc_generic_ops,
+                                            sizeof(rtc_generic_ops));
+
        return PTR_ERR_OR_ZERO(pdev);
 }
 device_initcall(rtc_init);
+#endif
 
 void read_persistent_clock(struct timespec *ts)
 {