linux/drivers/rtc/rtc-sysfs.c, branch v3.12.10

rtc: convert class code to use dev_groups

2013-07-29T20:10:58Z

The dev_attrs field of struct class is going away soon, dev_groups should be used instead. This converts the rtc class code to use the correct field. Acked-by: Alessandro Zummo Signed-off-by: Greg Kroah-Hartman

rtc: add ability to push out an existing wakealarm using sysfs

2013-07-03T23:07:54Z

This adds the ability for the rtc sysfs code to handle += characters at the beginning of a wakealarm setting string. This will allow the user to attempt to push out an existing wakealarm by a provided amount. In the case that the += characters are provided but the alarm is not active -EINVAL is returned. his is useful, at least for my purposes in suspend/resume testing. The basic test goes something like: 1. Set a wake alarm from userspace 5 seconds in the future 2. Start the suspend process (echo mem > /sys/power/state) 3. After ~2.5 seconds if userspace is still running (using another thread to check this), move the wake alarm 5 more seconds If the "move" involves an unset of the wakealarm then there's a period of time where the system is midway through suspending but has no wake alarm. It will get stuck. We'd rather not remove the "move" since the idea is to avoid a cancelled suspend when the alarm fires _during_ suspend. It is difficult for the test to tell the difference between a suspend that was cancelled because the alarm fired too early and a suspend that was Signed-off-by: Bernie Thompson Cc: Alessandro Zummo Cc: Doug Anderson Cc: "Rafael J. Wysocki" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc_sysfs_show_hctosys(): display 0 if resume failed

2012-10-05T18:05:04Z

Without this patch /sys/class/rtc/$CONFIG_RTC_HCTOSYS_DEVICE/hctosys contains a 1 (meaning "This rtc was used to initialize the system clock") even if setting the time by do_settimeofday() at bootup failed. The RTC can also be used to set the clock on resume, if it did 1, otherwise 0. Previously there was no indication if the RTC was used to set the clock in resume. This uses only CONFIG_RTC_HCTOSYS_DEVICE for conditional compilation instead of it and CONFIG_RTC_HCTOSYS to be more consistent. rtc_hctosys_ret was moved to class.c so class.c no longer depends on hctosys.c. [sfr@canb.auug.org.au: fix build] Signed-off-by: David Fries Cc: Matthew Garrett Cc: Alessandro Zummo Cc: Uwe Kleine-König Signed-off-by: Stephen Rothwell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc/hctosys: only claim the RTC provided the system time if it did

2010-03-12T23:52:28Z

Without this patch /sys/class/rtc/$CONFIG_RTC_HCTOSYS_DEVICE/hctosys contains a 1 (meaning "This rtc was used to initialize the system clock") even if reading the time at bootup failed. Moreover change error handling in rtc_hctosys() to use goto and so reduce the indention level. Signed-off-by: Uwe Kleine-König Cc: Paul Gortmaker Acked-by: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc: add boot_timesource sysfs attribute

2009-09-23T14:39:46Z

CONFIG_RTC_HCTOSYS allows the kernel to read the system time from the RTC at boot and resume, avoiding the need for userspace to do so. Unfortunately userspace currently has no way to know whether this configuration option is enabled and thus cannot sensibly choose whether to run hwclock itself or not. Add a hctosys sysfs attribute which indicates whether a given RTC set the system clock. Signed-off-by: Matthew Garrett Acked-by: Alessandro Zummo Cc: Mark Brown Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc: add the support for alarm time relative to current time in sysfs

2008-04-28T15:58:17Z

In current kernel if we want to set the alarm time, the absolute time the seconds relative to 1970-01-01 00:00:00) should be written into /sys/class/rtc/rtc0/wakealarm. It is not convenient. It is more reasonable to add the support for the alarm time relative to current RTC time.(the unit is second) For example: If the RTC is required to generate alarm after 2 minutes, the following will be OK. echo +120 > /sys/class/rtc/rtc0/wakealarm or echo +0x78 > /sys/class/rtc/rtc0/wakealarm Signed-off-by: Zhao Yakui Signed-off-by: Zhang Rui Signed-off-by: David Brownell Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc-cmos alarm acts as oneshot

2008-02-06T18:41:13Z

Start making the rtc-cmos alarm act more like a oneshot alarm by disabling that alarm after its IRQ fires. (ACPI hooks are also needed.) The Linux RTC framework has previously been a bit vague in this area, but any other behavior is problematic and not very portable. RTCs with full YYYY-MM-DD HH:MM[:SS] alarms won't have a problem here. Only ones with partial match criteria, with the most visible example being the PC RTC, get confused. (Because the criteria will match repeatedly.) Update comments relating to that oneshot behavior and timezone handling. (Timezones are another issue that's mostly visible with rtc-cmos. That's because PCs often dual-boot MS-Windows, which likes its RTC to match local wall-clock time instead of UTC.) Signed-off-by: David Brownell Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Add missing newlines to some uses of dev_ messages

2007-10-18T21:37:28Z

Found these while looking at printk uses. Add missing newlines to dev_ uses Add missing KERN_ prefixes to multiline dev_s Fixed a wierd->weird spelling typo Added a newline to a printk Signed-off-by: Joe Perches Cc: "Luck, Tony" Cc: Jens Axboe Cc: Mark M. Hoffman Cc: Roland Dreier Cc: Tilman Schmidt Cc: David Woodhouse Cc: Jeff Garzik Cc: Stephen Hemminger Cc: Greg KH Cc: Jeremy Fitzhardinge Cc: Geert Uytterhoeven Cc: Alessandro Zummo Cc: David Brownell Cc: James Smart Cc: Andrew Vasquez Cc: "Antonino A. Daplas" Cc: Evgeniy Polyakov Cc: Russell King Cc: Jaroslav Kysela Cc: Takashi Iwai Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc: add max_user_freq to sysfs

2007-10-16T16:43:13Z

drivers/char/rtc.c exposed a sysctl to change the maximum frequency at which a non-root user could ask the RTC to generate interrupts (via the RTC_IRQP_SET ioctl). This value is no longer available under the new RTC subsystem, so add it to sysfs for each RTC device. Works for me on x86_64 (both reads and writes), using rtc-cmos. Signed-off-by: Bryan Kadzban Acked-by: Alessandro Zummo Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc: remove rest of class_device

2007-05-08T18:15:18Z

Finish converting the RTC framework so it no longer uses class_device. Signed-off-by: David Brownell Acked-by: Greg Kroah-Hartman Acked-By: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds