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path: root/drivers/rtc/rtc-sa1100.c
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2007-02-20[PATCH] rtc-sa1100 rtc_wklarm.enabled bugfixesDavid Brownell
Some rtc-sa1100 bugfixes: - The read_alarm() method reports the rtc_wkalrm.enabled field properly. This patch is already in the handhelds.org tree. - And the set_alarm() method now handles that flag correctly, rather than making mismatched {en,dis}able_irq_wake() calls, which trigger runtime warning messages. (Those calls are best made in suspend/resume methods.) Note that while this SA1100/PXA RTC is fully capable of waking those ARM processors from sleep states, that mechanism isn't properly supported on either processor family, or in this driver. Some boards have board-specific PM glue providing partial workarounds for the weak generic PM support. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-12-13[PATCH] rtc framewok: rtc_wkalrm.enabled reporting updatesDavid Brownell
Fix a glitch in the procfs dumping of whether the alarm IRQ is enabled: use the traditional name (from drivers/char/rtc.c and many other places) of "alarm_IRQ", not "alrm_wakeup" (which didn't even match the efirtc code, which originated that reporting API). Also, update a few of the RTC drivers to stop providing that duplicate status, and/or to expose it properly when reporting the alarm state. We really don't want every RTC driver doing their own thing here... Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-01[PATCH] constify rtc_class_ops: update driversDavid Brownell
Update RTC framework so that drivers can constify their method tables, moving them from ".data" to ".rodata". Then update the drivers. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-02[PATCH] irq-flags: misc drivers: Use the new IRQF_ constantsThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-27[PATCH] spin/rwlock init cleanupsIngo Molnar
locking init cleanups: - convert " = SPIN_LOCK_UNLOCKED" to spin_lock_init() or DEFINE_SPINLOCK() - convert rwlocks in a similar manner this patch was generated automatically. Motivation: - cleanliness - lockdep needs control of lock initialization, which the open-coded variants do not give - it's also useful for -rt and for lock debugging in general Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-25[PATCH] rtc subsystem: add capability checksAlessandro Zummo
Centralize CAP_SYS_XXX checks to avoid duplicate code and missing checks in the drivers. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-21[PATCH] rtc subsystem: use ENOIOCTLCMD and ENOTTY where appropriateAlessandro Zummo
Appropriately use -ENOIOCTLCMD and -ENOTTY when the ioctl is not implemented by a driver. (akpm: we're not allowed to return -ENOIOCTLCMD to userspace. This patch does the right thing). Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-06[ARM] rtc-sa1100: fix compiler warnings and error cleanupRussell King
Fix: drivers/rtc/rtc-sa1100.c: In function `sa1100_rtc_proc': drivers/rtc/rtc-sa1100.c:298: warning: unsigned int format, long unsigned int arg (arg 3) and arrange for sa1100_rtc_open() to pass the devid to free_irq() rather than NULL. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-04-11[PATCH] RTC subsystem: SA1100 cleanupAlessandro Zummo
- convert printks to dev_xxx - remove messages in excess Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-11[PATCH] RTC subsystem: compact error messagesAlessandro Zummo
Move registration error message from drivers to core. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Cc: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-27[PATCH] RTC subsystem: SA1100/PXA2XX driverRichard Purdie
Add an RTC subsystem driver for the ARM SA1100/PXA2XX processor RTC. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>