^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2018 Fuzhou Rockchip Electronics Co., Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) static struct timespec begtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) static unsigned long time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) static unsigned long timespec_to_ulong(struct timespec *ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) return ts->tv_nsec < NSEC_PER_SEC / 2 ? ts->tv_sec : ts->tv_sec + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static void get_uptime(struct timespec *ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) getrawmonotonic(ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static int fake_rtc_read_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct timespec now, diff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) get_uptime(&now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) diff = timespec_sub(now, begtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) rtc_time_to_tm(time + timespec_to_ulong(&diff), tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return rtc_valid_tm(tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static int fake_rtc_set_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) get_uptime(&begtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) rtc_tm_to_time(tm, &time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int fake_rtc_alarm_irq_enable(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) unsigned int enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static int fake_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int fake_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static const struct rtc_class_ops fake_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .read_time = fake_rtc_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .set_time = fake_rtc_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) .alarm_irq_enable = fake_rtc_alarm_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) .read_alarm = fake_rtc_read_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) .set_alarm = fake_rtc_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static int fake_rtc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct rtc_device *fake_rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct rtc_time tm = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) .tm_wday = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) .tm_year = 118,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .tm_mon = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .tm_mday = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .tm_hour = 12,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) .tm_min = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) .tm_sec = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) get_uptime(&begtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) fake_rtc_set_time(&pdev->dev, &tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) device_init_wakeup(&pdev->dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) fake_rtc = devm_rtc_device_register(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) pdev->name, &fake_rtc_ops, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (IS_ERR(fake_rtc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return PTR_ERR(fake_rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) dev_info(&pdev->dev, "loaded; begtime is %lu, time is %lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) timespec_to_ulong(&begtime), time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static const struct of_device_id rtc_dt_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) { .compatible = "rtc-fake" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct platform_driver fake_rtc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .name = "rtc-fake",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .of_match_table = of_match_ptr(rtc_dt_ids),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .probe = fake_rtc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) module_platform_driver(fake_rtc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) MODULE_AUTHOR("jesse.huang@rock-chips.com");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) MODULE_DESCRIPTION("FAKE RTC driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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