// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2017 Spreadtrum Communications Inc. * */ #include <linux/bitops.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/rtc.h> #define SPRD_RTC_SEC_CNT_VALUE … #define SPRD_RTC_MIN_CNT_VALUE … #define SPRD_RTC_HOUR_CNT_VALUE … #define SPRD_RTC_DAY_CNT_VALUE … #define SPRD_RTC_SEC_CNT_UPD … #define SPRD_RTC_MIN_CNT_UPD … #define SPRD_RTC_HOUR_CNT_UPD … #define SPRD_RTC_DAY_CNT_UPD … #define SPRD_RTC_SEC_ALM_UPD … #define SPRD_RTC_MIN_ALM_UPD … #define SPRD_RTC_HOUR_ALM_UPD … #define SPRD_RTC_DAY_ALM_UPD … #define SPRD_RTC_INT_EN … #define SPRD_RTC_INT_RAW_STS … #define SPRD_RTC_INT_CLR … #define SPRD_RTC_INT_MASK_STS … #define SPRD_RTC_SEC_ALM_VALUE … #define SPRD_RTC_MIN_ALM_VALUE … #define SPRD_RTC_HOUR_ALM_VALUE … #define SPRD_RTC_DAY_ALM_VALUE … #define SPRD_RTC_SPG_VALUE … #define SPRD_RTC_SPG_UPD … #define SPRD_RTC_PWR_CTRL … #define SPRD_RTC_PWR_STS … #define SPRD_RTC_SEC_AUXALM_UPD … #define SPRD_RTC_MIN_AUXALM_UPD … #define SPRD_RTC_HOUR_AUXALM_UPD … #define SPRD_RTC_DAY_AUXALM_UPD … /* BIT & MASK definition for SPRD_RTC_INT_* registers */ #define SPRD_RTC_SEC_EN … #define SPRD_RTC_MIN_EN … #define SPRD_RTC_HOUR_EN … #define SPRD_RTC_DAY_EN … #define SPRD_RTC_ALARM_EN … #define SPRD_RTC_HRS_FORMAT_EN … #define SPRD_RTC_AUXALM_EN … #define SPRD_RTC_SPG_UPD_EN … #define SPRD_RTC_SEC_UPD_EN … #define SPRD_RTC_MIN_UPD_EN … #define SPRD_RTC_HOUR_UPD_EN … #define SPRD_RTC_DAY_UPD_EN … #define SPRD_RTC_ALMSEC_UPD_EN … #define SPRD_RTC_ALMMIN_UPD_EN … #define SPRD_RTC_ALMHOUR_UPD_EN … #define SPRD_RTC_ALMDAY_UPD_EN … #define SPRD_RTC_INT_MASK … #define SPRD_RTC_TIME_INT_MASK … #define SPRD_RTC_ALMTIME_INT_MASK … #define SPRD_RTC_ALM_INT_MASK … /* second/minute/hour/day values mask definition */ #define SPRD_RTC_SEC_MASK … #define SPRD_RTC_MIN_MASK … #define SPRD_RTC_HOUR_MASK … #define SPRD_RTC_DAY_MASK … /* alarm lock definition for SPRD_RTC_SPG_UPD register */ #define SPRD_RTC_ALMLOCK_MASK … #define SPRD_RTC_ALM_UNLOCK … #define SPRD_RTC_ALM_LOCK … /* SPG values definition for SPRD_RTC_SPG_UPD register */ #define SPRD_RTC_POWEROFF_ALM_FLAG … /* power control/status definition */ #define SPRD_RTC_POWER_RESET_VALUE … #define SPRD_RTC_POWER_STS_CLEAR … #define SPRD_RTC_POWER_STS_SHIFT … #define SPRD_RTC_POWER_STS_VALID … /* timeout of synchronizing time and alarm registers (us) */ #define SPRD_RTC_POLL_TIMEOUT … #define SPRD_RTC_POLL_DELAY_US … struct sprd_rtc { … }; /* * The Spreadtrum RTC controller has 3 groups registers, including time, normal * alarm and auxiliary alarm. The time group registers are used to set RTC time, * the normal alarm registers are used to set normal alarm, and the auxiliary * alarm registers are used to set auxiliary alarm. Both alarm event and * auxiliary alarm event can wake up system from deep sleep, but only alarm * event can power up system from power down status. */ enum sprd_rtc_reg_types { … }; static int sprd_rtc_clear_alarm_ints(struct sprd_rtc *rtc) { … } static int sprd_rtc_lock_alarm(struct sprd_rtc *rtc, bool lock) { … } static int sprd_rtc_get_secs(struct sprd_rtc *rtc, enum sprd_rtc_reg_types type, time64_t *secs) { … } static int sprd_rtc_set_secs(struct sprd_rtc *rtc, enum sprd_rtc_reg_types type, time64_t secs) { … } static int sprd_rtc_set_aux_alarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int sprd_rtc_read_time(struct device *dev, struct rtc_time *tm) { … } static int sprd_rtc_set_time(struct device *dev, struct rtc_time *tm) { … } static int sprd_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int sprd_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { … } static int sprd_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { … } static const struct rtc_class_ops sprd_rtc_ops = …; static irqreturn_t sprd_rtc_handler(int irq, void *dev_id) { … } static int sprd_rtc_check_power_down(struct sprd_rtc *rtc) { … } static int sprd_rtc_check_alarm_int(struct sprd_rtc *rtc) { … } static int sprd_rtc_probe(struct platform_device *pdev) { … } static const struct of_device_id sprd_rtc_of_match[] = …; MODULE_DEVICE_TABLE(of, sprd_rtc_of_match); static struct platform_driver sprd_rtc_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …;
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