The subject says it all. Signed-off-by: Benedikt Spranger <[EMAIL PROTECTED]> Signed-off-by: Sebastian Siewior <[EMAIL PROTECTED]> --- Mixed up the frequency. This patch has been tested :)
--- a/arch/m68knommu/platform/coldfire/Makefile +++ b/arch/m68knommu/platform/coldfire/Makefile @@ -20,7 +20,7 @@ obj-$(CONFIG_COLDFIRE) += dma.o entry.o obj-$(CONFIG_M5206) += timers.o obj-$(CONFIG_M5206e) += timers.o obj-$(CONFIG_M520x) += pit.o -obj-$(CONFIG_M523x) += pit.o +obj-$(CONFIG_M523x) += pit.o dma_timer.o obj-$(CONFIG_M5249) += timers.o obj-$(CONFIG_M527x) += pit.o obj-$(CONFIG_M5272) += timers.o --- /dev/null +++ b/arch/m68knommu/platform/coldfire/dma_timer.c @@ -0,0 +1,59 @@ +/* + * dma_timer.c -- Freescale ColdFire DMA Timer. + * + * Copyright (C) 2007, Benedikt Spranger <[EMAIL PROTECTED]> + */ + +#include <linux/clocksource.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/jiffies.h> +#include <linux/module.h> +#include <linux/spinlock.h> +#include <linux/io.h> +#include <linux/timer.h> + +#include <asm/machdep.h> +#include <asm/coldfire.h> +#include <asm/mcfpit.h> +#include <asm/mcfsim.h> + +#define DTMR0 MCF_IPSBAR + 0x400 +#define DTXMR0 MCF_IPSBAR + 0x402 +#define DTER0 MCF_IPSBAR + 0x403 +#define DTRR0 MCF_IPSBAR + 0x404 +#define DTCR0 MCF_IPSBAR + 0x408 +#define DTCN0 MCF_IPSBAR + 0x40c + +#define DMA_FREQ ((MCF_CLK / 2) / 16) + +/* + * By default use DMA Timer 0 as the system time source. + */ +cycle_t cf_dt_get_cycles(void) +{ + return __raw_readl(DTCN0); +} + +static struct clocksource clocksource_cf_dt = { + .name = "coldfire_dma_timer", + .rating = 200, + .read = cf_dt_get_cycles, + .mask = CLOCKSOURCE_MASK(32), + .shift = 20, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static int __init init_cf_dt_clocksource(void) +{ + __raw_writew(0x000d, DTMR0); + __raw_writeb(0x00, DTXMR0); + __raw_writeb(0x00, DTER0); + __raw_writel(0xffffffff, DTRR0); + + clocksource_cf_dt.mult = clocksource_hz2mult(DMA_FREQ, + clocksource_cf_dt.shift); + return clocksource_register(&clocksource_cf_dt); +} + +arch_initcall(init_cf_dt_clocksource); _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev