Exemplos de pwm_test_class_init em C++ (Cpp)

Exemplo n.º 1

static int pwm_test_probe(struct platform_device *pdev)
{
	struct pwm_test *pwm_test;

	pwm_test = devm_kzalloc(&pdev->dev, sizeof(*pwm_test), GFP_KERNEL);

	if (!pwm_test) {
		dev_err(&pdev->dev, "memory error\n");
		return -ENOMEM;
	}

	if (pwm_test_class_init(&pdev->dev)) {
		dev_err(&pdev->dev, "sysfs creation failed\n");
		return -EINVAL;
	}
	dev_set_drvdata(&pdev->dev, pwm_test);
	platform_set_drvdata(pdev, pwm_test);
	return 0;
}

Exemplo n.º 2

Arquivo: pwm_test.c Projeto: agoshakuatsushi/beaglebone_black_pwm

static int pwm_test_probe(struct platform_device *pdev)
{
	struct pwm_test *pwm_test;
	struct pinctrl *pinctrl;
	struct device_node *node = (&pdev->dev)->of_node;
	int rc;

	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
	if (IS_ERR(pinctrl))
		dev_warn(&pdev->dev, "unable to select pin group. PWM not muxed right\n");


	pwm_test = devm_kzalloc(&pdev->dev, sizeof(*pwm_test), GFP_KERNEL);

	if (!pwm_test) {
		dev_err(&pdev->dev, "memory error\n");
		return -ENOMEM;
	}

	if (pwm_test_class_init(&pdev->dev)) {
		dev_err(&pdev->dev, "sysfs creation failed\n");
		return -EINVAL;
	}

	pwm_test->pwm = devm_pwm_get(&pdev->dev, NULL);
	if (IS_ERR(pwm_test->pwm)) {
		dev_err(&pdev->dev, "unable to request PWM\n");	
		return -EINVAL;			
	}

	pwm_test->requested = 1;

	pr_debug("pwm_test got PWM\n");

	/* Get the properties of the pwm. This is set in the device driver (tiehrpwm) */
	pwm_test->period = pwm_get_period(pwm_test->pwm);

	/* Determine running or not from the device tree */
	rc = of_property_read_u32(node, "enabled", (u32*) &(pwm_test->run));
	if (rc < 0)
		return rc;

	if(pwm_test->run){
		rc = pwm_enable(pwm_test->pwm);
		if (rc < 0)
				return rc;
	}

	/* Determine the duty from the device tree */
	rc = of_property_read_u32(node, "duty", (u32*) &(pwm_test->duty_s));
	if (rc < 0)
		return rc;

	rc = pwm_config(pwm_test->pwm, pwm_test->duty_s, pwm_test->period);
	if (rc) {
		pr_err("Unable to set pwm duty %d\n", rc);
		return rc;
	}
	

	platform_set_drvdata(pdev, pwm_test);
	return 0;
}