--- a/arch/arm/mach-cns3xxx/core.c +++ b/arch/arm/mach-cns3xxx/core.c @@ -103,12 +103,13 @@ static void cns3xxx_timer_set_mode(enum switch (mode) { case CLOCK_EVT_MODE_PERIODIC: - reload = pclk * 20 / (3 * HZ) * 0x25000; + reload = pclk * 1000000 / HZ; writel(reload, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET); ctrl |= (1 << 0) | (1 << 2) | (1 << 9); break; case CLOCK_EVT_MODE_ONESHOT: /* period set, and timer enabled in 'next_event' hook */ + writel(0, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET); ctrl |= (1 << 2) | (1 << 9); break; case CLOCK_EVT_MODE_UNUSED: @@ -136,7 +137,7 @@ static struct clock_event_device cns3xxx .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, .set_mode = cns3xxx_timer_set_mode, .set_next_event = cns3xxx_timer_set_next_event, - .rating = 350, + .rating = 300, .cpumask = cpu_all_mask, }; @@ -183,6 +184,35 @@ static void __init cns3xxx_init_twd(void #endif } +static cycle_t cns3xxx_get_cycles(struct clocksource *cs) +{ + u64 val; + + val = readl(cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET); + val &= 0xffff; + + return ((val << 32) | readl(cns3xxx_tmr1 + TIMER_FREERUN_OFFSET)); +} + +static struct clocksource clocksource_cns3xxx = { + .name = "freerun", + .rating = 200, + .read = cns3xxx_get_cycles, + .mask = CLOCKSOURCE_MASK(48), + .shift = 16, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static void __init cns3xxx_clocksource_init(void) +{ + /* Reset the FreeRunning counter */ + writel((1 << 16), cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET); + + clocksource_cns3xxx.mult = + clocksource_khz2mult(100, clocksource_cns3xxx.shift); + clocksource_register(&clocksource_cns3xxx); +} + /* * Set up the clock source and clock events devices */ @@ -200,13 +230,12 @@ static void __init __cns3xxx_timer_init( /* stop free running timer3 */ writel(0, cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET); - /* timer1 */ - writel(0x5C800, cns3xxx_tmr1 + TIMER1_COUNTER_OFFSET); - writel(0x5C800, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET); - writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V1_OFFSET); writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V2_OFFSET); + val = (cns3xxx_cpu_clock() >> 3) * 1000000 / HZ; + writel(val, cns3xxx_tmr1 + TIMER1_COUNTER_OFFSET); + /* mask irq, non-mask timer1 overflow */ irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); irq_mask &= ~(1 << 2); @@ -218,23 +247,9 @@ static void __init __cns3xxx_timer_init( val |= (1 << 9); writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); - /* timer2 */ - writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V1_OFFSET); - writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V2_OFFSET); - - /* mask irq */ - irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); - irq_mask |= ((1 << 3) | (1 << 4) | (1 << 5)); - writel(irq_mask, cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); - - /* down counter */ - val = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); - val |= (1 << 10); - writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); - - /* Make irqs happen for the system timer */ setup_irq(timer_irq, &cns3xxx_timer_irq); + cns3xxx_clocksource_init(); cns3xxx_clockevents_init(timer_irq); cns3xxx_init_twd(); }