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Edit File : rtc.h \| Size : 3.92 KB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note / / * Generic RTC interface. * This version contains the part of the user interface to the Real Time Clock * service. It is used with both the legacy mc146818 and also EFI * Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out * from <linux/mc146818rtc.h> to this file for 2.4 kernels. * * Copyright (C) 1999 Hewlett-Packard Co. * Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com> / #ifndef _LINUX_RTC_H_ #define _LINUX_RTC_H_ / * The struct used to pass data via the following ioctl. Similar to the * struct tm in <time.h>, but it needs to be here so that the kernel * source is self contained, allowing cross-compiles, etc. etc. / 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; }; / * This data structure is inspired by the EFI (v0.92) wakeup * alarm API. / struct rtc_wkalrm { unsigned char enabled; / 0 = alarm disabled, 1 = alarm enabled / unsigned char pending; / 0 = alarm not pending, 1 = alarm pending / struct rtc_time time; / time the alarm is set to / }; / * Data structure to control PLL correction some better RTC feature * pll_value is used to get or set current value of correction, * the rest of the struct is used to query HW capabilities. * This is modeled after the RTC used in Q40/Q60 computers but * should be sufficiently flexible for other devices * * +ve pll_value means clock will run faster by * pll_valuepll_posmult/pll_clock -ve pll_value means clock will run slower by * pll_valuepll_negmult/pll_clock / struct rtc_pll_info { int pll_ctrl; /* placeholder for fancier control / int pll_value; / get/set correction value / int pll_max; / max +ve (faster) adjustment value / int pll_min; / max -ve (slower) adjustment value / int pll_posmult; / factor for +ve correction / int pll_negmult; / factor for -ve correction / long pll_clock; / base PLL frequency / }; / * ioctl calls that are permitted to the /dev/rtc interface, if * any of the RTC drivers are enabled. / #define RTC_AIE_ON _IO('p', 0x01) / Alarm int. enable on / #define RTC_AIE_OFF _IO('p', 0x02) / ... off / #define RTC_UIE_ON _IO('p', 0x03) / Update int. enable on / #define RTC_UIE_OFF _IO('p', 0x04) / ... off / #define RTC_PIE_ON _IO('p', 0x05) / Periodic int. enable on / #define RTC_PIE_OFF _IO('p', 0x06) / ... off / #define RTC_WIE_ON _IO('p', 0x0f) / Watchdog int. enable on / #define RTC_WIE_OFF _IO('p', 0x10) / ... off / #define RTC_ALM_SET _IOW('p', 0x07, struct rtc_time) / Set alarm time / #define RTC_ALM_READ _IOR('p', 0x08, struct rtc_time) / Read alarm time / #define RTC_RD_TIME _IOR('p', 0x09, struct rtc_time) / Read RTC time / #define RTC_SET_TIME _IOW('p', 0x0a, struct rtc_time) / Set RTC time / #define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) / Read IRQ rate / #define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) / Set IRQ rate / #define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) / Read epoch / #define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) / Set epoch / #define RTC_WKALM_SET _IOW('p', 0x0f, struct rtc_wkalrm)/ Set wakeup alarm/ #define RTC_WKALM_RD _IOR('p', 0x10, struct rtc_wkalrm)/ Get wakeup alarm/ #define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) / Get PLL correction / #define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) / Set PLL correction / #define RTC_VL_READ _IOR('p', 0x13, int) / Voltage low detector / #define RTC_VL_CLR _IO('p', 0x14) / Clear voltage low information / / interrupt flags / #define RTC_IRQF 0x80 / Any of the following is active / #define RTC_PF 0x40 / Periodic interrupt / #define RTC_AF 0x20 / Alarm interrupt / #define RTC_UF 0x10 / Update interrupt for 1Hz RTC / #define RTC_MAX_FREQ 8192 #endif / _LINUX_RTC_H_ */ Back

Edit File : rtc.h | Size : 3.92 KB

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Generic RTC interface.
 * This version contains the part of the user interface to the Real Time Clock
 * service. It is used with both the legacy mc146818 and also  EFI
 * Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out
 * from <linux/mc146818rtc.h> to this file for 2.4 kernels.
 *
 * Copyright (C) 1999 Hewlett-Packard Co.
 * Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com>
 */
#ifndef _LINUX_RTC_H_
#define _LINUX_RTC_H_

/*
 * The struct used to pass data via the following ioctl. Similar to the
 * struct tm in <time.h>, but it needs to be here so that the kernel
 * source is self contained, allowing cross-compiles, etc. etc.
 */

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;
};

/*
 * This data structure is inspired by the EFI (v0.92) wakeup
 * alarm API.
 */
struct rtc_wkalrm {
	unsigned char enabled;	/* 0 = alarm disabled, 1 = alarm enabled */
	unsigned char pending;  /* 0 = alarm not pending, 1 = alarm pending */
	struct rtc_time time;	/* time the alarm is set to */
};

/*
 * Data structure to control PLL correction some better RTC feature
 * pll_value is used to get or set current value of correction,
 * the rest of the struct is used to query HW capabilities.
 * This is modeled after the RTC used in Q40/Q60 computers but
 * should be sufficiently flexible for other devices
 *
 * +ve pll_value means clock will run faster by
 *   pll_value*pll_posmult/pll_clock
 * -ve pll_value means clock will run slower by
 *   pll_value*pll_negmult/pll_clock
 */

struct rtc_pll_info {
	int pll_ctrl;       /* placeholder for fancier control */
	int pll_value;      /* get/set correction value */
	int pll_max;        /* max +ve (faster) adjustment value */
	int pll_min;        /* max -ve (slower) adjustment value */
	int pll_posmult;    /* factor for +ve correction */
	int pll_negmult;    /* factor for -ve correction */
	long pll_clock;     /* base PLL frequency */
};

/*
 * ioctl calls that are permitted to the /dev/rtc interface, if
 * any of the RTC drivers are enabled.
 */

#define RTC_AIE_ON	_IO('p', 0x01)	/* Alarm int. enable on		*/
#define RTC_AIE_OFF	_IO('p', 0x02)	/* ... off			*/
#define RTC_UIE_ON	_IO('p', 0x03)	/* Update int. enable on	*/
#define RTC_UIE_OFF	_IO('p', 0x04)	/* ... off			*/
#define RTC_PIE_ON	_IO('p', 0x05)	/* Periodic int. enable on	*/
#define RTC_PIE_OFF	_IO('p', 0x06)	/* ... off			*/
#define RTC_WIE_ON	_IO('p', 0x0f)  /* Watchdog int. enable on	*/
#define RTC_WIE_OFF	_IO('p', 0x10)  /* ... off			*/

#define RTC_ALM_SET	_IOW('p', 0x07, struct rtc_time) /* Set alarm time  */
#define RTC_ALM_READ	_IOR('p', 0x08, struct rtc_time) /* Read alarm time */
#define RTC_RD_TIME	_IOR('p', 0x09, struct rtc_time) /* Read RTC time   */
#define RTC_SET_TIME	_IOW('p', 0x0a, struct rtc_time) /* Set RTC time    */
#define RTC_IRQP_READ	_IOR('p', 0x0b, unsigned long)	 /* Read IRQ rate   */
#define RTC_IRQP_SET	_IOW('p', 0x0c, unsigned long)	 /* Set IRQ rate    */
#define RTC_EPOCH_READ	_IOR('p', 0x0d, unsigned long)	 /* Read epoch      */
#define RTC_EPOCH_SET	_IOW('p', 0x0e, unsigned long)	 /* Set epoch       */

#define RTC_WKALM_SET	_IOW('p', 0x0f, struct rtc_wkalrm)/* Set wakeup alarm*/
#define RTC_WKALM_RD	_IOR('p', 0x10, struct rtc_wkalrm)/* Get wakeup alarm*/

#define RTC_PLL_GET	_IOR('p', 0x11, struct rtc_pll_info)  /* Get PLL correction */
#define RTC_PLL_SET	_IOW('p', 0x12, struct rtc_pll_info)  /* Set PLL correction */

#define RTC_VL_READ	_IOR('p', 0x13, int)	/* Voltage low detector */
#define RTC_VL_CLR	_IO('p', 0x14)		/* Clear voltage low information */

/* interrupt flags */
#define RTC_IRQF 0x80	/* Any of the following is active */
#define RTC_PF 0x40	/* Periodic interrupt */
#define RTC_AF 0x20	/* Alarm interrupt */
#define RTC_UF 0x10	/* Update interrupt for 1Hz RTC */

#define RTC_MAX_FREQ	8192

#endif /* _LINUX_RTC_H_ */

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