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2019-03-25m68k: mvme147: Handle timer counter overflowFinn Thain1-10/+11
Reading the timer counter races with timer overflow (and the corresponding interrupt). This is resolved by reading the overflow register and taking this value into account. The interrupt handler must clear the overflow register when it eventually executes. Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2019-03-25m68k: mvme147: Convert to clocksource APIFinn Thain1-6/+30
Add a platform clocksource by adapting the existing arch_gettimeoffset implementation. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2019-03-25m68k: Drop ARCH_USES_GETTIMEOFFSETFinn Thain1-2/+0
The functions that implement arch_gettimeoffset are re-used by new clocksource drivers in subsequent patches. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2019-03-25m68k: Call timer_interrupt() with interrupts disabledFinn Thain1-8/+10
Some platforms execute their timer handler with the interrupt priority level set below 6. That means the handler could be interrupted by another driver and this could lead to re-entry of the timer core. Avoid this by use of local_irq_save/restore for timer interrupt dispatch. This provides mutual exclusion around the timer interrupt flag access which is needed later in this series for the clocksource conversion. Reported-by: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/alpine.DEB.2.21.1811131407120.2697@nanos.tec.linutronix.de Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-07-29m68k: Remove unused set_clock_mmss() helpersArnd Bergmann1-7/+0
Commit 397ac99c6cef ("m68k: remove dead timer code") removed set_rtc_mmss() because it was unused in 2012. However, this was itself the only user of the mach_set_clock_mmss() callback and the many implementations of that callback, which are equally unused. This removes all of those as well. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Greg Ungerer <gerg@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2018-05-22m68k: Fix off-by-one calendar monthFinn Thain1-1/+3
This fixes a bug in read_persistent_clock() which causes the system clock to lag the Real Time Clock by one month. The problem was noticed on a Mac, but theoretically it must also affect Atari, BVME6000 and Q40. The tm_mon value in the struct rtc_time passed to mach_hwclk() is zero-based, and atari_mste_hwclk(), atari_tt_hwclk(), bvme6000_hwclk(), mac_hwclk() and q40_hwclk() all make this adjustment. Unfortunately, dn_dummy_hwclk(), mvme147_hwclk(), mvme16x_hwclk(), sun3_hwclk() and sun3x_hwclk() fail to decrement tm_mon. Also m68328_hwclk() assumes a one-based tm_mon. Bring these platforms into line and fix read_persistent_clock() so it works correctly on all m68k platforms. The datasheets for the RTC devices found on the affected platforms all confirm that the year is stored as a value in the range 0-99 and the month is stored as a value in the range 1-12. Please refer to the datasheets for MC146818 (Apollo), DS1643 (MVME), ICM7170 (Sun 3) and M48T02 (Sun 3x). Reported-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2017-02-12m68k/mvme147: Modernize printing of kernel messagesGeert Uytterhoeven1-1/+1
Convert from printk() to pr_*(). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2016-06-04char/genrtc: remove m68k supportArnd Bergmann1-1/+0
The asm/rtc.h header is only used for the old gen_rtc driver that has been replaced by rtc-generic. According to Geert Uytterhoeven, nobody has used the old driver on m68k for a long time, so we can now just remove the header file and disallow the driver in Kconfig. All files that used to include asm/rtc.h are now changed so they include the headers that were used implicitly through asm/rtc.h. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2015-01-11m68k/mvme147: config.c - Remove unused functionsRickard Strandqvist1-46/+0
Remove the function mvme147_init_console_port() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> [geert: Also remove now unused m147_scc_write(), scc_write(), scc_delay()] Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2013-11-26m68k/UAPI: Use proper types (endianness/size) in <asm/bootinfo*.h>Geert Uytterhoeven1-1/+3
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2013-11-26m68k/UAPI: Disintegrate arch/m68k/include/asm/bootinfo.hGeert Uytterhoeven1-0/+1
Export the bootinfo definitions that are used by bootstrap loaders, and split them up in generic and platform-specific parts. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2013-11-26m68k: Mark functions only called from setup_arch() __initGeert Uytterhoeven1-1/+1
Some functions that are only called (indirectly) from setup_arch() lack __init annotations. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2012-12-24m68k: set arch_gettimeoffset directlyStephen Warren1-4/+4
remove m68k's mach_gettimeoffset function pointer, and instead directly set the arch_gettimeoffset function pointer. This requires multiplying all function results by 1000, since the removed m68k_gettimeoffset() did this. Also, s/unsigned long/u32/ just to make the function prototypes exactly match that of arch_gettimeoffset. Cc: Joshua Thompson <funaho@jurai.org> Cc: Sam Creasey <sammy@sammy.net> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Phil Blundell <philb@gnu.org> Signed-off-by: Stephen Warren <swarren@nvidia.com>
2012-03-28Disintegrate asm/system.h for M68KDavid Howells1-1/+0
Disintegrate asm/system.h for M68K. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Greg Ungerer <gerg@uclinux.org> cc: linux-m68k@lists.linux-m68k.org
2011-11-08m68k/irq: Remove obsolete support for user vector interrupt fixupsGeert Uytterhoeven1-1/+1
It was used on Apollo only, before its conversion to genirq. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-11-08m68k/irq: Remove obsolete IRQ_FLG_* usersGeert Uytterhoeven1-2/+1
The m68k core irq code stopped honoring these flags during the irq restructuring in 2006. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-01-31m68k: Switch do_timer() to xtime_update()Torben Hohn1-2/+2
xtime_update() properly takes the xtime_lock Signed-off-by: Torben Hohn <torbenh@gmx.de> Cc: Sam Creasey <sammy@sammy.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: johnstul@us.ibm.com Cc: Roman Zippel <zippel@linux-m68k.org> Cc: hch@infradead.org Cc: yong.zhang0@gmail.com Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greg Ungerer <gerg@uclinux.org> LKML-Reference: <20110127150006.23248.71790.stgit@localhost> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-01-12m68k: mvme147 core - Kill warn_unused_result warningsGeert Uytterhoeven1-2/+3
warning: ignoring return value of 'request_irq', declared with attribute warn_unused_result Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2009-01-12m68k: Kill several external declarations in source filesGeert Uytterhoeven1-1/+0
- Replace external declarations by proper includes where availiable. The accesses to some symbols had to be modified, as before they were declared using e.g. "extern int _end", while asm-generic/sections.h uses e.g. "extern char _end[]" - Remove unused or superfluous external declarations Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2008-10-23proc: move /proc/hardware to m68k-specific codeAlexey Dobriyan1-10/+0
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2007-07-20m68k: missing __initAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-10-09IRQ: Use the new typedef for interrupt handler function pointersDavid Howells1-3/+3
Use the new typedef for interrupt handler function pointers rather than actually spelling out the full thing each time. This was scripted with the following small shell script: #!/bin/sh egrep -nHrl -e 'irqreturn_t[ ]*[(][*]' $* | while read i do echo $i perl -pi -e 's/irqreturn_t\s*[(]\s*[*]\s*([_a-zA-Z0-9]*)\s*[)]\s*[(]\s*int\s*,\s*void\s*[*]\s*[)]/irq_handler_t \1/g' $i || exit $? done Signed-Off-By: David Howells <dhowells@redhat.com>
2006-10-07[PATCH] m68k pt_regs fixesAl Viro1-5/+5
m68k_handle_int() split in two functions: __m68k_handle_int() takes pt_regs * and does set_irq_regs(); m68k_handle_int() doesn't get pt_regs *. Places where we used to call m68k_handle_int() recursively with the same pt_regs have simply lost the second argument, the rest is switched to __m68k_handle_int(). The rest of patch is just dropping pt_regs * where needed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-25[PATCH] m68k: convert VME irq codeRoman Zippel1-13/+9
Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds1-0/+229
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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