power/reset/gpio-poweroff.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * Toggles a GPIO pin to power down a device
15 #include <linux/gpio/consumer.h>
33 	/* drive it active, also inactive->active edge */  in gpio_poweroff_do_poweroff()
37 	/* drive inactive, also active->inactive edge */  in gpio_poweroff_do_poweroff()
41 	/* drive it active, also inactive->active edge */  in gpio_poweroff_do_poweroff()
57 		dev_err(&pdev->dev,  in gpio_poweroff_probe()
60 		return -EBUSY;  in gpio_poweroff_probe()
63 	input = device_property_read_bool(&pdev->dev, "input");  in gpio_poweroff_probe()
69 	device_property_read_u32(&pdev->dev, "active-delay-ms", &active_delay);  in gpio_poweroff_probe()
70 	device_property_read_u32(&pdev->dev, "inactive-delay-ms",  in gpio_poweroff_probe()
72 	device_property_read_u32(&pdev->dev, "timeout-ms", &timeout);  in gpio_poweroff_probe()
74 	reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);  in gpio_poweroff_probe()
91 	{ .compatible = "gpio-poweroff", },
100 		.name = "poweroff-gpio",
108 MODULE_DESCRIPTION("GPIO poweroff driver");
109 MODULE_ALIAS("platform:poweroff-gpio");