diff options
Diffstat (limited to 'arch/arm/mach-pxa/clocksource.c')
-rw-r--r-- | arch/arm/mach-pxa/clocksource.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/clocksource.c b/arch/arm/mach-pxa/clocksource.c new file mode 100644 index 0000000000..04d090a748 --- /dev/null +++ b/arch/arm/mach-pxa/clocksource.c @@ -0,0 +1,45 @@ +/* + * (C) Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <common.h> +#include <init.h> +#include <clock.h> +#include <asm/io.h> + +#define OSCR 0x40A00010 + +uint64_t pxa_clocksource_read(void) +{ + return readl(OSCR); +} + +static struct clocksource cs = { + .read = pxa_clocksource_read, + .mask = 0xffffffff, + .shift = 20, +}; + +static int clocksource_init(void) +{ + cs.mult = clocksource_hz2mult(3250000, cs.shift); + + init_clock(&cs); + + return 0; +} + +core_initcall(clocksource_init); |