^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) 2019 BayLibre, SAS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Author: Neil Armstrong <narmstrong@baylibre.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/time64.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) struct meson_vrtc_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) void __iomem *io_alarm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) struct rtc_device *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) unsigned long alarm_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) bool enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int meson_vrtc_read_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct timespec64 time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) dev_dbg(dev, "%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) ktime_get_raw_ts64(&time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) rtc_time64_to_tm(time.tv_sec, tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static void meson_vrtc_set_wakeup_time(struct meson_vrtc_data *vrtc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned long time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) writel_relaxed(time, vrtc->io_alarm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static int meson_vrtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) dev_dbg(dev, "%s: alarm->enabled=%d\n", __func__, alarm->enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (alarm->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) vrtc->alarm_time = rtc_tm_to_time64(&alarm->time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) vrtc->alarm_time = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static int meson_vrtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) vrtc->enabled = enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static const struct rtc_class_ops meson_vrtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) .read_time = meson_vrtc_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .set_alarm = meson_vrtc_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .alarm_irq_enable = meson_vrtc_alarm_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int meson_vrtc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct meson_vrtc_data *vrtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) vrtc = devm_kzalloc(&pdev->dev, sizeof(*vrtc), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (!vrtc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) vrtc->io_alarm = devm_platform_ioremap_resource(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (IS_ERR(vrtc->io_alarm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return PTR_ERR(vrtc->io_alarm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) device_init_wakeup(&pdev->dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) platform_set_drvdata(pdev, vrtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) vrtc->rtc = devm_rtc_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (IS_ERR(vrtc->rtc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return PTR_ERR(vrtc->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) vrtc->rtc->ops = &meson_vrtc_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return rtc_register_device(vrtc->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static int __maybe_unused meson_vrtc_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) dev_dbg(dev, "%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (vrtc->alarm_time) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned long local_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) long alarm_secs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct timespec64 time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ktime_get_raw_ts64(&time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) local_time = time.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) dev_dbg(dev, "alarm_time = %lus, local_time=%lus\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) vrtc->alarm_time, local_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) alarm_secs = vrtc->alarm_time - local_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (alarm_secs > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) meson_vrtc_set_wakeup_time(vrtc, alarm_secs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) dev_dbg(dev, "system will wakeup in %lds.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) alarm_secs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) dev_err(dev, "alarm time already passed: %lds.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) alarm_secs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static int __maybe_unused meson_vrtc_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dev_dbg(dev, "%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) vrtc->alarm_time = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) meson_vrtc_set_wakeup_time(vrtc, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static SIMPLE_DEV_PM_OPS(meson_vrtc_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) meson_vrtc_suspend, meson_vrtc_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static const struct of_device_id meson_vrtc_dt_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) { .compatible = "amlogic,meson-vrtc"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) MODULE_DEVICE_TABLE(of, meson_vrtc_dt_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static struct platform_driver meson_vrtc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .probe = meson_vrtc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .name = "meson-vrtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .of_match_table = meson_vrtc_dt_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .pm = &meson_vrtc_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) module_platform_driver(meson_vrtc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) MODULE_DESCRIPTION("Amlogic Virtual Wakeup RTC Timer driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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