X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Frtc.h;h=8aabfc1162a47a304efa53993cbffbd8a91ad0f0;hb=d16c9d0b3729b1b120caa1b9836660c3bbcd7b87;hp=4b7ce6108cfc3f726b4da10bd61d48634780349a;hpb=9f9276c34cbbf67fd1b3788f0be326b47fc69123;p=oweals%2Fu-boot.git diff --git a/include/rtc.h b/include/rtc.h index 4b7ce6108c..8aabfc1162 100644 --- a/include/rtc.h +++ b/include/rtc.h @@ -1,8 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * (C) Copyright 2001 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * SPDX-License-Identifier: GPL-2.0+ */ /* @@ -15,38 +14,171 @@ * it there instead of in evey single driver */ #include +#include -/* - * The struct used to pass data from the generic interface code to - * the hardware dependend low-level code ande vice versa. Identical - * to struct rtc_time used by the Linux kernel. - * - * Note that there are small but significant differences to the - * common "struct time": - * - * struct time: struct rtc_time: - * tm_mon 0 ... 11 1 ... 12 - * tm_year years since 1900 years since 0 - */ - -struct rtc_time { - int tm_sec; - int tm_min; - int tm_hour; - int tm_mday; - int tm_mon; - int tm_year; - int tm_wday; - int tm_yday; - int tm_isdst; +#ifdef CONFIG_DM_RTC + +struct udevice; + +struct rtc_ops { + /** + * get() - get the current time + * + * Returns the current time read from the RTC device. The driver + * is responsible for setting up every field in the structure. + * + * @dev: Device to read from + * @time: Place to put the time that is read + */ + int (*get)(struct udevice *dev, struct rtc_time *time); + + /** + * set() - set the current time + * + * Sets the time in the RTC device. The driver can expect every + * field to be set correctly. + * + * @dev: Device to read from + * @time: Time to write + */ + int (*set)(struct udevice *dev, const struct rtc_time *time); + + /** + * reset() - reset the RTC to a known-good state + * + * This function resets the RTC to a known-good state. The time may + * be unset by this method, so should be set after this method is + * called. + * + * @dev: Device to read from + * @return 0 if OK, -ve on error + */ + int (*reset)(struct udevice *dev); + + /** + * read8() - Read an 8-bit register + * + * @dev: Device to read from + * @reg: Register to read + * @return value read, or -ve on error + */ + int (*read8)(struct udevice *dev, unsigned int reg); + + /** + * write8() - Write an 8-bit register + * + * @dev: Device to write to + * @reg: Register to write + * @value: Value to write + * @return 0 if OK, -ve on error + */ + int (*write8)(struct udevice *dev, unsigned int reg, int val); }; +/* Access the operations for an RTC device */ +#define rtc_get_ops(dev) ((struct rtc_ops *)(dev)->driver->ops) + +/** + * dm_rtc_get() - Read the time from an RTC + * + * @dev: Device to read from + * @time: Place to put the current time + * @return 0 if OK, -ve on error + */ +int dm_rtc_get(struct udevice *dev, struct rtc_time *time); + +/** + * dm_rtc_set() - Write a time to an RTC + * + * @dev: Device to read from + * @time: Time to write into the RTC + * @return 0 if OK, -ve on error + */ +int dm_rtc_set(struct udevice *dev, struct rtc_time *time); + +/** + * dm_rtc_reset() - reset the RTC to a known-good state + * + * If the RTC appears to be broken (e.g. it is not counting up in seconds) + * it may need to be reset to a known good state. This function achieves this. + * After resetting the RTC the time should then be set to a known value by + * the caller. + * + * @dev: Device to read from + * @return 0 if OK, -ve on error + */ +int dm_rtc_reset(struct udevice *dev); + +/** + * rtc_read8() - Read an 8-bit register + * + * @dev: Device to read from + * @reg: Register to read + * @return value read, or -ve on error + */ +int rtc_read8(struct udevice *dev, unsigned int reg); + +/** + * rtc_write8() - Write an 8-bit register + * + * @dev: Device to write to + * @reg: Register to write + * @value: Value to write + * @return 0 if OK, -ve on error + */ +int rtc_write8(struct udevice *dev, unsigned int reg, int val); + +/** + * rtc_read16() - Read a 16-bit value from the RTC + * + * @dev: Device to read from + * @reg: Offset to start reading from + * @valuep: Place to put the value that is read + * @return 0 if OK, -ve on error + */ +int rtc_read16(struct udevice *dev, unsigned int reg, u16 *valuep); + +/** + * rtc_write16() - Write a 16-bit value to the RTC + * + * @dev: Device to write to + * @reg: Register to start writing to + * @value: Value to write + * @return 0 if OK, -ve on error + */ +int rtc_write16(struct udevice *dev, unsigned int reg, u16 value); + +/** + * rtc_read32() - Read a 32-bit value from the RTC + * + * @dev: Device to read from + * @reg: Offset to start reading from + * @valuep: Place to put the value that is read + * @return 0 if OK, -ve on error + */ +int rtc_read32(struct udevice *dev, unsigned int reg, u32 *valuep); + +/** + * rtc_write32() - Write a 32-bit value to the RTC + * + * @dev: Device to write to + * @reg: Register to start writing to + * @value: Value to write + * @return 0 if OK, -ve on error + */ +int rtc_write32(struct udevice *dev, unsigned int reg, u32 value); + +#ifdef CONFIG_RTC_ENABLE_32KHZ_OUTPUT +int rtc_enable_32khz_output(int busnum, int chip_addr); +#endif + +#else int rtc_get (struct rtc_time *); int rtc_set (struct rtc_time *); void rtc_reset (void); - -unsigned long mktime (unsigned int, unsigned int, unsigned int, - unsigned int, unsigned int, unsigned int); +#ifdef CONFIG_RTC_ENABLE_32KHZ_OUTPUT +void rtc_enable_32khz_output(void); +#endif /** * rtc_read8() - Read an 8-bit register @@ -84,6 +216,18 @@ void rtc_write32(int reg, u32 value); * rtc_init() - Set up the real time clock ready for use */ void rtc_init(void); +#endif /* CONFIG_DM_RTC */ + +/** + * is_leap_year - Check if year is a leap year + * + * @year Year + * @return 1 if leap year + */ +static inline bool is_leap_year(unsigned int year) +{ + return (!(year % 4) && (year % 100)) || !(year % 400); +} /** * rtc_calc_weekday() - Work out the weekday from a time @@ -106,8 +250,28 @@ int rtc_calc_weekday(struct rtc_time *time); * * @time_t: Number of seconds since 1970-01-01 00:00:00 * @time: Place to put the broken-out time - * @return 0 if OK, -EINVAL if the weekday could not be determined */ -int rtc_to_tm(int time_t, struct rtc_time *time); +void rtc_to_tm(u64 time_t, struct rtc_time *time); + +/** + * rtc_mktime() - Convert a broken-out time into a time_t value + * + * The following fields need to be valid for this function to work: + * tm_sec, tm_min, tm_hour, tm_mday, tm_mon, tm_year + * + * Note that tm_wday and tm_yday are ignored. + * + * @time: Broken-out time to convert + * @return corresponding time_t value, seconds since 1970-01-01 00:00:00 + */ +unsigned long rtc_mktime(const struct rtc_time *time); + +/** + * rtc_month_days() - The number of days in the month + * + * @month: month (January = 0) + * @year: year (4 digits) + */ +int rtc_month_days(unsigned int month, unsigned int year); #endif /* _RTC_H_ */