6f52b16c5b
Many user space API headers are missing licensing information, which makes it hard for compliance tools to determine the correct license. By default are files without license information under the default license of the kernel, which is GPLV2. Marking them GPLV2 would exclude them from being included in non GPLV2 code, which is obviously not intended. The user space API headers fall under the syscall exception which is in the kernels COPYING file: NOTE! This copyright does *not* cover user programs that use kernel services by normal system calls - this is merely considered normal use of the kernel, and does *not* fall under the heading of "derived work". otherwise syscall usage would not be possible. Update the files which contain no license information with an SPDX license identifier. The chosen identifier is 'GPL-2.0 WITH Linux-syscall-note' which is the officially assigned identifier for the Linux syscall exception. SPDX license identifiers are a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. See the previous patch in this series for the methodology of how this patch was researched. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
109 lines
3.9 KiB
C
109 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Generic RTC interface.
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* This version contains the part of the user interface to the Real Time Clock
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* service. It is used with both the legacy mc146818 and also EFI
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* Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out
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* from <linux/mc146818rtc.h> to this file for 2.4 kernels.
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*
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* Copyright (C) 1999 Hewlett-Packard Co.
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* Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com>
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*/
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#ifndef _UAPI_LINUX_RTC_H_
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#define _UAPI_LINUX_RTC_H_
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/*
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* The struct used to pass data via the following ioctl. Similar to the
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* struct tm in <time.h>, but it needs to be here so that the kernel
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* source is self contained, allowing cross-compiles, etc. etc.
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*/
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struct rtc_time {
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int tm_sec;
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int tm_min;
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int tm_hour;
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int tm_mday;
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int tm_mon;
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int tm_year;
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int tm_wday;
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int tm_yday;
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int tm_isdst;
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};
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/*
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* This data structure is inspired by the EFI (v0.92) wakeup
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* alarm API.
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*/
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struct rtc_wkalrm {
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unsigned char enabled; /* 0 = alarm disabled, 1 = alarm enabled */
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unsigned char pending; /* 0 = alarm not pending, 1 = alarm pending */
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struct rtc_time time; /* time the alarm is set to */
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};
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/*
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* Data structure to control PLL correction some better RTC feature
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* pll_value is used to get or set current value of correction,
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* the rest of the struct is used to query HW capabilities.
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* This is modeled after the RTC used in Q40/Q60 computers but
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* should be sufficiently flexible for other devices
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*
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* +ve pll_value means clock will run faster by
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* pll_value*pll_posmult/pll_clock
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* -ve pll_value means clock will run slower by
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* pll_value*pll_negmult/pll_clock
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*/
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struct rtc_pll_info {
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int pll_ctrl; /* placeholder for fancier control */
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int pll_value; /* get/set correction value */
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int pll_max; /* max +ve (faster) adjustment value */
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int pll_min; /* max -ve (slower) adjustment value */
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int pll_posmult; /* factor for +ve correction */
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int pll_negmult; /* factor for -ve correction */
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long pll_clock; /* base PLL frequency */
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};
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/*
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* ioctl calls that are permitted to the /dev/rtc interface, if
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* any of the RTC drivers are enabled.
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*/
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#define RTC_AIE_ON _IO('p', 0x01) /* Alarm int. enable on */
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#define RTC_AIE_OFF _IO('p', 0x02) /* ... off */
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#define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */
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#define RTC_UIE_OFF _IO('p', 0x04) /* ... off */
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#define RTC_PIE_ON _IO('p', 0x05) /* Periodic int. enable on */
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#define RTC_PIE_OFF _IO('p', 0x06) /* ... off */
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#define RTC_WIE_ON _IO('p', 0x0f) /* Watchdog int. enable on */
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#define RTC_WIE_OFF _IO('p', 0x10) /* ... off */
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#define RTC_ALM_SET _IOW('p', 0x07, struct rtc_time) /* Set alarm time */
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#define RTC_ALM_READ _IOR('p', 0x08, struct rtc_time) /* Read alarm time */
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#define RTC_RD_TIME _IOR('p', 0x09, struct rtc_time) /* Read RTC time */
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#define RTC_SET_TIME _IOW('p', 0x0a, struct rtc_time) /* Set RTC time */
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#define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) /* Read IRQ rate */
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#define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) /* Set IRQ rate */
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#define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) /* Read epoch */
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#define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) /* Set epoch */
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#define RTC_WKALM_SET _IOW('p', 0x0f, struct rtc_wkalrm)/* Set wakeup alarm*/
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#define RTC_WKALM_RD _IOR('p', 0x10, struct rtc_wkalrm)/* Get wakeup alarm*/
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#define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) /* Get PLL correction */
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#define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) /* Set PLL correction */
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#define RTC_VL_READ _IOR('p', 0x13, int) /* Voltage low detector */
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#define RTC_VL_CLR _IO('p', 0x14) /* Clear voltage low information */
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/* interrupt flags */
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#define RTC_IRQF 0x80 /* Any of the following is active */
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#define RTC_PF 0x40 /* Periodic interrupt */
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#define RTC_AF 0x20 /* Alarm interrupt */
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#define RTC_UF 0x10 /* Update interrupt for 1Hz RTC */
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#define RTC_MAX_FREQ 8192
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#endif /* _UAPI_LINUX_RTC_H_ */
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