--- zzzz-none-000/linux-3.10.107/drivers/rtc/class.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/rtc/class.c 2021-02-04 17:41:59.000000000 +0000 @@ -14,6 +14,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include +#include #include #include #include @@ -38,31 +39,37 @@ int rtc_hctosys_ret = -ENODEV; #endif -#if defined(CONFIG_PM) && defined(CONFIG_RTC_HCTOSYS_DEVICE) +#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_RTC_HCTOSYS_DEVICE) /* * On suspend(), measure the delta between one RTC and the * system's wall clock; restore it on resume(). */ -static struct timespec old_rtc, old_system, old_delta; +static struct timespec64 old_rtc, old_system, old_delta; -static int rtc_suspend(struct device *dev, pm_message_t mesg) +static int rtc_suspend(struct device *dev) { struct rtc_device *rtc = to_rtc_device(dev); struct rtc_time tm; - struct timespec delta, delta_delta; + struct timespec64 delta, delta_delta; + int err; - if (has_persistent_clock()) + if (timekeeping_rtc_skipsuspend()) return 0; if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0) return 0; /* snapshot the current RTC and system time at suspend*/ - rtc_read_time(rtc, &tm); - getnstimeofday(&old_system); - rtc_tm_to_time(&tm, &old_rtc.tv_sec); + err = rtc_read_time(rtc, &tm); + if (err < 0) { + pr_debug("%s: fail to read rtc time\n", dev_name(&rtc->dev)); + return 0; + } + + getnstimeofday64(&old_system); + old_rtc.tv_sec = rtc_tm_to_time64(&tm); /* @@ -71,8 +78,8 @@ * try to compensate so the difference in system time * and rtc time stays close to constant. */ - delta = timespec_sub(old_system, old_rtc); - delta_delta = timespec_sub(delta, old_delta); + delta = timespec64_sub(old_system, old_rtc); + delta_delta = timespec64_sub(delta, old_delta); if (delta_delta.tv_sec < -2 || delta_delta.tv_sec >= 2) { /* * if delta_delta is too large, assume time correction @@ -81,7 +88,7 @@ old_delta = delta; } else { /* Otherwise try to adjust old_system to compensate */ - old_system = timespec_sub(old_system, delta_delta); + old_system = timespec64_sub(old_system, delta_delta); } return 0; @@ -91,10 +98,11 @@ { struct rtc_device *rtc = to_rtc_device(dev); struct rtc_time tm; - struct timespec new_system, new_rtc; - struct timespec sleep_time; + struct timespec64 new_system, new_rtc; + struct timespec64 sleep_time; + int err; - if (has_persistent_clock()) + if (timekeeping_rtc_skipresume()) return 0; rtc_hctosys_ret = -ENODEV; @@ -102,13 +110,14 @@ return 0; /* snapshot the current rtc and system time at resume */ - getnstimeofday(&new_system); - rtc_read_time(rtc, &tm); - if (rtc_valid_tm(&tm) != 0) { - pr_debug("%s: bogus resume time\n", dev_name(&rtc->dev)); + getnstimeofday64(&new_system); + err = rtc_read_time(rtc, &tm); + if (err < 0) { + pr_debug("%s: fail to read rtc time\n", dev_name(&rtc->dev)); return 0; } - rtc_tm_to_time(&tm, &new_rtc.tv_sec); + + new_rtc.tv_sec = rtc_tm_to_time64(&tm); new_rtc.tv_nsec = 0; if (new_rtc.tv_sec < old_rtc.tv_sec) { @@ -117,7 +126,7 @@ } /* calculate the RTC time delta (sleep time)*/ - sleep_time = timespec_sub(new_rtc, old_rtc); + sleep_time = timespec64_sub(new_rtc, old_rtc); /* * Since these RTC suspend/resume handlers are not called @@ -126,18 +135,19 @@ * so subtract kernel run-time between rtc_suspend to rtc_resume * to keep things accurate. */ - sleep_time = timespec_sub(sleep_time, - timespec_sub(new_system, old_system)); + sleep_time = timespec64_sub(sleep_time, + timespec64_sub(new_system, old_system)); if (sleep_time.tv_sec >= 0) - timekeeping_inject_sleeptime(&sleep_time); + timekeeping_inject_sleeptime64(&sleep_time); rtc_hctosys_ret = 0; return 0; } +static SIMPLE_DEV_PM_OPS(rtc_class_dev_pm_ops, rtc_suspend, rtc_resume); +#define RTC_CLASS_DEV_PM_OPS (&rtc_class_dev_pm_ops) #else -#define rtc_suspend NULL -#define rtc_resume NULL +#define RTC_CLASS_DEV_PM_OPS NULL #endif @@ -156,12 +166,27 @@ { struct rtc_device *rtc; struct rtc_wkalrm alrm; - int id, err; + int of_id = -1, id = -1, err; + + if (dev->of_node) + of_id = of_alias_get_id(dev->of_node, "rtc"); + else if (dev->parent && dev->parent->of_node) + of_id = of_alias_get_id(dev->parent->of_node, "rtc"); + + if (of_id >= 0) { + id = ida_simple_get(&rtc_ida, of_id, of_id + 1, + GFP_KERNEL); + if (id < 0) + dev_warn(dev, "/aliases ID %d not available\n", + of_id); + } - id = ida_simple_get(&rtc_ida, 0, 0, GFP_KERNEL); if (id < 0) { - err = id; - goto exit; + id = ida_simple_get(&rtc_ida, 0, 0, GFP_KERNEL); + if (id < 0) { + err = id; + goto exit; + } } rtc = kzalloc(sizeof(struct rtc_device), GFP_KERNEL); @@ -177,6 +202,7 @@ rtc->max_user_freq = 64; rtc->dev.parent = dev; rtc->dev.class = rtc_class; + rtc->dev.groups = rtc_get_dev_attribute_groups(); rtc->dev.release = rtc_device_release; mutex_init(&rtc->ops_lock); @@ -196,25 +222,25 @@ rtc->pie_timer.function = rtc_pie_update_irq; rtc->pie_enabled = 0; + strlcpy(rtc->name, name, RTC_DEVICE_NAME_SIZE); + dev_set_name(&rtc->dev, "rtc%d", id); + /* Check to see if there is an ALARM already set in hw */ err = __rtc_read_alarm(rtc, &alrm); if (!err && !rtc_valid_tm(&alrm.time)) rtc_initialize_alarm(rtc, &alrm); - strlcpy(rtc->name, name, RTC_DEVICE_NAME_SIZE); - dev_set_name(&rtc->dev, "rtc%d", id); - rtc_dev_prepare(rtc); err = device_register(&rtc->dev); if (err) { + /* This will free both memory and the ID */ put_device(&rtc->dev); - goto exit_kfree; + goto exit; } rtc_dev_add_device(rtc); - rtc_sysfs_add_device(rtc); rtc_proc_add_device(rtc); dev_info(dev, "rtc core: registered %s as %s\n", @@ -222,9 +248,6 @@ return rtc; -exit_kfree: - kfree(rtc); - exit_ida: ida_simple_remove(&rtc_ida, id); @@ -243,19 +266,17 @@ */ void rtc_device_unregister(struct rtc_device *rtc) { - if (get_device(&rtc->dev) != NULL) { - mutex_lock(&rtc->ops_lock); - /* remove innards of this RTC, then disable it, before - * letting any rtc_class_open() users access it again - */ - rtc_sysfs_del_device(rtc); - rtc_dev_del_device(rtc); - rtc_proc_del_device(rtc); - device_unregister(&rtc->dev); - rtc->ops = NULL; - mutex_unlock(&rtc->ops_lock); - put_device(&rtc->dev); - } + mutex_lock(&rtc->ops_lock); + /* + * Remove innards of this RTC, then disable it, before + * letting any rtc_class_open() users access it again + */ + rtc_dev_del_device(rtc); + rtc_proc_del_device(rtc); + device_del(&rtc->dev); + rtc->ops = NULL; + mutex_unlock(&rtc->ops_lock); + put_device(&rtc->dev); } EXPORT_SYMBOL_GPL(rtc_device_unregister); @@ -336,10 +357,8 @@ pr_err("couldn't create class\n"); return PTR_ERR(rtc_class); } - rtc_class->suspend = rtc_suspend; - rtc_class->resume = rtc_resume; + rtc_class->pm = RTC_CLASS_DEV_PM_OPS; rtc_dev_init(); - rtc_sysfs_init(rtc_class); return 0; }