// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for MediaTek SoC based RTC * * Copyright (C) 2017 Sean Wang <[email protected]> */ #include <linux/clk.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/rtc.h> #define MTK_RTC_DEV … #define MTK_RTC_PWRCHK1 … #define RTC_PWRCHK1_MAGIC … #define MTK_RTC_PWRCHK2 … #define RTC_PWRCHK2_MAGIC … #define MTK_RTC_KEY … #define RTC_KEY_MAGIC … #define MTK_RTC_PROT1 … #define RTC_PROT1_MAGIC … #define MTK_RTC_PROT2 … #define RTC_PROT2_MAGIC … #define MTK_RTC_PROT3 … #define RTC_PROT3_MAGIC … #define MTK_RTC_PROT4 … #define RTC_PROT4_MAGIC … #define MTK_RTC_CTL … #define RTC_RC_STOP … #define MTK_RTC_DEBNCE … #define RTC_DEBNCE_MASK … #define MTK_RTC_INT … #define RTC_INT_AL_STA … /* * Ranges from 0x40 to 0x78 provide RTC time setup for year, month, * day of month, day of week, hour, minute and second. */ #define MTK_RTC_TREG(_t, _f) … #define MTK_RTC_AL_CTL … #define RTC_AL_EN … #define RTC_AL_ALL … /* * The offset is used in the translation for the year between in struct * rtc_time and in hardware register MTK_RTC_TREG(x,MTK_YEA) */ #define MTK_RTC_TM_YR_OFFSET … /* * The lowest value for the valid tm_year. RTC hardware would take incorrectly * tm_year 100 as not a leap year and thus it is also required being excluded * from the valid options. */ #define MTK_RTC_TM_YR_L … /* * The most year the RTC can hold is 99 and the next to 99 in year register * would be wraparound to 0, for MT7622. */ #define MTK_RTC_HW_YR_LIMIT … /* The highest value for the valid tm_year */ #define MTK_RTC_TM_YR_H … /* Simple macro helps to check whether the hardware supports the tm_year */ #define MTK_RTC_TM_YR_VALID(_y) … /* Types of the function the RTC provides are time counter and alarm. */ enum { … }; /* Indexes are used for the pointer to relevant registers in MTK_RTC_TREG */ enum { … }; struct mtk_rtc { … }; static void mtk_w32(struct mtk_rtc *rtc, u32 reg, u32 val) { … } static u32 mtk_r32(struct mtk_rtc *rtc, u32 reg) { … } static void mtk_rmw(struct mtk_rtc *rtc, u32 reg, u32 mask, u32 set) { … } static void mtk_set(struct mtk_rtc *rtc, u32 reg, u32 val) { … } static void mtk_clr(struct mtk_rtc *rtc, u32 reg, u32 val) { … } static void mtk_rtc_hw_init(struct mtk_rtc *hw) { … } static void mtk_rtc_get_alarm_or_time(struct mtk_rtc *hw, struct rtc_time *tm, int time_alarm) { … } static void mtk_rtc_set_alarm_or_time(struct mtk_rtc *hw, struct rtc_time *tm, int time_alarm) { … } static irqreturn_t mtk_rtc_alarmirq(int irq, void *id) { … } static int mtk_rtc_gettime(struct device *dev, struct rtc_time *tm) { … } static int mtk_rtc_settime(struct device *dev, struct rtc_time *tm) { … } static int mtk_rtc_getalarm(struct device *dev, struct rtc_wkalrm *wkalrm) { … } static int mtk_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm) { … } static const struct rtc_class_ops mtk_rtc_ops = …; static const struct of_device_id mtk_rtc_match[] = …; MODULE_DEVICE_TABLE(of, mtk_rtc_match); static int mtk_rtc_probe(struct platform_device *pdev) { … } static void mtk_rtc_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int mtk_rtc_suspend(struct device *dev) { … } static int mtk_rtc_resume(struct device *dev) { … } static SIMPLE_DEV_PM_OPS(mtk_rtc_pm_ops, mtk_rtc_suspend, mtk_rtc_resume); #define MTK_RTC_PM_OPS … #else /* CONFIG_PM */ #define MTK_RTC_PM_OPS … #endif /* CONFIG_PM */ static struct platform_driver mtk_rtc_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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