Lines Matching +full:active +full:- +full:delay

1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/delay.h>
31 	struct gpio_poweroff *gpio_poweroff = data->cb_data;
33 	/* drive it active, also inactive->active edge */
34 	gpiod_direction_output(gpio_poweroff->reset_gpio, 1);
35 	mdelay(gpio_poweroff->active_delay_ms);
37 	/* drive inactive, also active->inactive edge */
38 	gpiod_set_value_cansleep(gpio_poweroff->reset_gpio, 0);
39 	mdelay(gpio_poweroff->inactive_delay_ms);
41 	/* drive it active, also inactive->active edge */
42 	gpiod_set_value_cansleep(gpio_poweroff->reset_gpio, 1);
45 	mdelay(gpio_poweroff->timeout_ms);
48 	 * If code reaches this point, it means that gpio-poweroff has failed
50 	 * Warn the user that the attempt to poweroff via gpio-poweroff
53 	WARN(1, "Failed to poweroff via gpio-poweroff mechanism\n");
66 	gpio_poweroff = devm_kzalloc(&pdev->dev, sizeof(*gpio_poweroff), GFP_KERNEL);
68 		return -ENOMEM;
70 	input = device_property_read_bool(&pdev->dev, "input");
77 	gpio_poweroff->active_delay_ms = 100;
78 	gpio_poweroff->inactive_delay_ms = 100;
79 	gpio_poweroff->timeout_ms = DEFAULT_TIMEOUT_MS;
81 	device_property_read_u32(&pdev->dev, "active-delay-ms", &gpio_poweroff->active_delay_ms);
82 	device_property_read_u32(&pdev->dev, "inactive-delay-ms",
83 				 &gpio_poweroff->inactive_delay_ms);
84 	device_property_read_u32(&pdev->dev, "timeout-ms", &gpio_poweroff->timeout_ms);
85 	device_property_read_u32(&pdev->dev, "priority", &priority);
87 		dev_err(&pdev->dev, "Invalid priority property: %u\n", priority);
88 		return -EINVAL;
91 	gpio_poweroff->reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);
92 	if (IS_ERR(gpio_poweroff->reset_gpio))
93 		return PTR_ERR(gpio_poweroff->reset_gpio);
95 	ret = devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_POWER_OFF,
98 		return dev_err_probe(&pdev->dev, ret, "Cannot register poweroff handler\n");
104 	{ .compatible = "gpio-poweroff", },
112 		.name = "poweroff-gpio",
121 MODULE_ALIAS("platform:poweroff-gpio");