clocksource: sun4i: Report the minimum tick that we can program (12e1480b) · Commits · 戴 / test

drivers/clocksource/sun4i_timer.c

+6 −4

Original line number	Diff line number	Diff line
		@@ -37,6 +37,8 @@
		#define TIMER_INTVAL_REG(val) (0x10 * (val) + 0x14)
		#define TIMER_CNTVAL_REG(val) (0x10 * (val) + 0x18)

		#define TIMER_SYNC_TICKS 3

		static void __iomem *timer_base;
		static u32 ticks_per_jiffy;

		@@ -50,7 +52,7 @@ static void sun4i_clkevt_sync(void)
		{
		u32 old = readl(timer_base + TIMER_CNTVAL_REG(1));

		while ((old - readl(timer_base + TIMER_CNTVAL_REG(1))) < 3)
		while ((old - readl(timer_base + TIMER_CNTVAL_REG(1))) < TIMER_SYNC_TICKS)
		cpu_relax();
		}

		@@ -104,7 +106,7 @@ static int sun4i_clkevt_next_event(unsigned long evt,
		struct clock_event_device *unused)
		{
		sun4i_clkevt_time_stop(0);
		sun4i_clkevt_time_setup(0, evt);
		sun4i_clkevt_time_setup(0, evt - TIMER_SYNC_TICKS);
		sun4i_clkevt_time_start(0, false);

		return 0;
		@@ -187,8 +189,8 @@ static void __init sun4i_timer_init(struct device_node *node)

		sun4i_clockevent.cpumask = cpumask_of(0);

		clockevents_config_and_register(&sun4i_clockevent, rate, 0x1,
		0xffffffff);
		clockevents_config_and_register(&sun4i_clockevent, rate,
		TIMER_SYNC_TICKS, 0xffffffff);
		}
		CLOCKSOURCE_OF_DECLARE(sun4i, "allwinner,sun4i-timer",
		sun4i_timer_init);