修改GPIO导出默认初始值

hc

2024-10-16 50a212ec906f7524620675f0c57357691c26c81f

 kernel/arch/xtensa/kernel/time.c
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@@ -52,14 +52,11 @@
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 	.flags = CLOCK_SOURCE_IS_CONTINUOUS,
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 };
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-static int ccount_timer_set_next_event(unsigned long delta,
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-		struct clock_event_device *dev);
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 struct ccount_timer {
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 	struct clock_event_device evt;
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 	int irq_enabled;
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 	char name[24];
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 };
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-static DEFINE_PER_CPU(struct ccount_timer, ccount_timer);
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 static int ccount_timer_set_next_event(unsigned long delta,
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 		struct clock_event_device *dev)
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@@ -107,12 +104,29 @@
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 	return 0;
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 }
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-static irqreturn_t timer_interrupt(int irq, void *dev_id);
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-static struct irqaction timer_irqaction = {
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-	.handler =	timer_interrupt,
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-	.flags =	IRQF_TIMER,
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-	.name =		"timer",
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+static DEFINE_PER_CPU(struct ccount_timer, ccount_timer) = {
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+	.evt = {
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+		.features = CLOCK_EVT_FEAT_ONESHOT,
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+		.rating = 300,
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+		.set_next_event = ccount_timer_set_next_event,
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+		.set_state_shutdown = ccount_timer_shutdown,
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+		.set_state_oneshot = ccount_timer_set_oneshot,
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+		.tick_resume = ccount_timer_set_oneshot,
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+	},
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 };
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+
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+static irqreturn_t timer_interrupt(int irq, void *dev_id)
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+{
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+	struct clock_event_device *evt = &this_cpu_ptr(&ccount_timer)->evt;
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+
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+	set_linux_timer(get_linux_timer());
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+	evt->event_handler(evt);
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+
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+	/* Allow platform to do something useful (Wdog). */
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+	platform_heartbeat();
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+
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+	return IRQ_HANDLED;
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+}
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 void local_timer_setup(unsigned cpu)
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 {
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@@ -120,14 +134,8 @@
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 	struct clock_event_device *clockevent = &timer->evt;
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 	timer->irq_enabled = 1;
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-	clockevent->name = timer->name;
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 	snprintf(timer->name, sizeof(timer->name), "ccount_clockevent_%u", cpu);
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-	clockevent->features = CLOCK_EVT_FEAT_ONESHOT;
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-	clockevent->rating = 300;
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-	clockevent->set_next_event = ccount_timer_set_next_event;
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-	clockevent->set_state_shutdown = ccount_timer_shutdown;
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-	clockevent->set_state_oneshot = ccount_timer_set_oneshot;
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-	clockevent->tick_resume = ccount_timer_set_oneshot;
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+	clockevent->name = timer->name;
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 	clockevent->cpumask = cpumask_of(cpu);
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 	clockevent->irq = irq_create_mapping(NULL, LINUX_TIMER_INT);
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 	if (WARN(!clockevent->irq, "error: can't map timer irq"))
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@@ -146,6 +154,7 @@
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 	cpu = of_find_compatible_node(NULL, NULL, "cdns,xtensa-cpu");
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 	if (cpu) {
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 		clk = of_clk_get(cpu, 0);
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+		of_node_put(cpu);
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 		if (!IS_ERR(clk)) {
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 			ccount_freq = clk_get_rate(clk);
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 			return;
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@@ -170,6 +179,8 @@
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 void __init time_init(void)
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 {
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+	int irq;
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+
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 	of_clk_init(NULL);
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 #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
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 	pr_info("Calibrating CPU frequency ");
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@@ -185,26 +196,11 @@
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 	     __func__);
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 	clocksource_register_hz(&ccount_clocksource, ccount_freq);
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 	local_timer_setup(0);
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-	setup_irq(this_cpu_ptr(&ccount_timer)->evt.irq, &timer_irqaction);
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+	irq = this_cpu_ptr(&ccount_timer)->evt.irq;
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+	if (request_irq(irq, timer_interrupt, IRQF_TIMER, "timer", NULL))
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+		pr_err("Failed to request irq %d (timer)\n", irq);
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 	sched_clock_register(ccount_sched_clock_read, 32, ccount_freq);
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 	timer_probe();
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-}
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-
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-/*
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- * The timer interrupt is called HZ times per second.
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- */
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-
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-irqreturn_t timer_interrupt(int irq, void *dev_id)
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-{
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-	struct clock_event_device *evt = &this_cpu_ptr(&ccount_timer)->evt;
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-
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-	set_linux_timer(get_linux_timer());
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-	evt->event_handler(evt);
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-
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-	/* Allow platform to do something useful (Wdog). */
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-	platform_heartbeat();
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-
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-	return IRQ_HANDLED;
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 }
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 #ifndef CONFIG_GENERIC_CALIBRATE_DELAY