Esempi in C++ (Cpp) per rt_timer_request

Esempio n. 1

File: timer.c Progetto: 1800alex/linux

static int rt_timer_probe(struct platform_device *pdev)
{
	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	struct rt_timer *rt;
	struct clk *clk;

	rt = devm_kzalloc(&pdev->dev, sizeof(*rt), GFP_KERNEL);
	if (!rt) {
		dev_err(&pdev->dev, "failed to allocate memory\n");
		return -ENOMEM;
	}

	rt->irq = platform_get_irq(pdev, 0);
	if (!rt->irq) {
		dev_err(&pdev->dev, "failed to load irq\n");
		return -ENOENT;
	}

	rt->membase = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(rt->membase))
		return PTR_ERR(rt->membase);

	clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(clk)) {
		dev_err(&pdev->dev, "failed get clock rate\n");
		return PTR_ERR(clk);
	}

	rt->timer_freq = clk_get_rate(clk) / TMR0CTL_PRESCALE_DIV;
	if (!rt->timer_freq)
		return -EINVAL;

	rt->dev = &pdev->dev;
	platform_set_drvdata(pdev, rt);

	rt_timer_request(rt);
	rt_timer_config(rt, 2);
	rt_timer_enable(rt);

	dev_info(&pdev->dev, "maximum frequency is %luHz\n", rt->timer_freq);

	return 0;
}

Esempio n. 2

static int rt_timer_probe(struct platform_device *pdev)
{
	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	const __be32 *divisor;
	struct rt_timer *rt;
	struct clk *clk;
	int ret;

	rt = devm_kzalloc(&pdev->dev, sizeof(*rt), GFP_KERNEL);
	if (!rt) {
		dev_err(&pdev->dev, "failed to allocate memory\n");
		return -ENOMEM;
	}

	rt->irq = platform_get_irq(pdev, 0);
	if (!rt->irq) {
		dev_err(&pdev->dev, "failed to load irq\n");
		return -ENOENT;
	}

	rt->membase = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(rt->membase))
		return PTR_ERR(rt->membase);

	clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(clk)) {
		dev_err(&pdev->dev, "failed get clock rate\n");
		return PTR_ERR(clk);
	}

	rt->timer_freq = clk_get_rate(clk) / TMR0CTL_PRESCALE_DIV;
	if (!rt->timer_freq)
		return -EINVAL;

	rt->duty_cycle = 100;
	rt->dev = &pdev->dev;
	platform_set_drvdata(pdev, rt);

	ret = rt_timer_request(rt);
	if (ret)
		return ret;

	divisor = of_get_property(pdev->dev.of_node, "ralink,divisor", NULL);
	if (divisor)
		rt_timer_config(rt, be32_to_cpu(*divisor));
	else
		rt_timer_config(rt, 200);

	rt->led_trigger.name = "pwmtimer",
	rt->led_trigger.activate = rt_timer_trig_activate,
	rt->led_trigger.deactivate = rt_timer_trig_deactivate,

	ret = led_trigger_register(&rt->led_trigger);
	if (ret)
		return ret;

	INIT_LIST_HEAD(&rt->gpios);

	dev_info(&pdev->dev, "maximum frequncy is %luHz\n", rt->timer_freq);

	return 0;
}