diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/mach-epxa10db/time.c |
Linux-2.6.12-rc2v2.6.12-rc2
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!
Diffstat (limited to 'arch/arm/mach-epxa10db/time.c')
-rw-r--r-- | arch/arm/mach-epxa10db/time.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/arm/mach-epxa10db/time.c b/arch/arm/mach-epxa10db/time.c new file mode 100644 index 00000000000..1b991f3cc3c --- /dev/null +++ b/arch/arm/mach-epxa10db/time.c @@ -0,0 +1,78 @@ +/* + * linux/arch/arm/mach-epxa10db/time.c + * + * Copyright (C) 2000 Deep Blue Solutions + * Copyright (C) 2001 Altera Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/sched.h> + +#include <asm/hardware.h> +#include <asm/system.h> +#include <asm/leds.h> + +#include <asm/mach/time.h> + +#define TIMER00_TYPE (volatile unsigned int*) +#include <asm/arch/timer00.h> + +static int epxa10db_set_rtc(void) +{ + return 1; +} + +static int epxa10db_rtc_init(void) +{ + set_rtc = epxa10db_set_rtc; + + return 0; +} + +__initcall(epxa10db_rtc_init); + + +/* + * IRQ handler for the timer + */ +static irqreturn_t +epxa10db_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + write_seqlock(&xtime_lock); + + // ...clear the interrupt + *TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))|=TIMER0_CR_CI_MSK; + + timer_tick(regs); + write_sequnlock(&xtime_lock); + + return IRQ_HANDLED; +} + +static struct irqaction epxa10db_timer_irq = { + .name = "Excalibur Timer Tick", + .flags = SA_INTERRUPT, + .handler = epxa10db_timer_interrupt +}; + +/* + * Set up timer interrupt, and return the current time in seconds. + */ +static void __init epxa10db_timer_init(void) +{ + /* Start the timer */ + *TIMER0_LIMIT(IO_ADDRESS(EXC_TIMER00_BASE))=(unsigned int)(EXC_AHB2_CLK_FREQUENCY/200); + *TIMER0_PRESCALE(IO_ADDRESS(EXC_TIMER00_BASE))=1; + *TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))=TIMER0_CR_IE_MSK | TIMER0_CR_S_MSK; + + setup_irq(IRQ_TIMER0, &epxa10db_timer_irq); +} + +struct sys_timer epxa10db_timer = { + .init = epxa10db_timer_init, +}; |