1 // SPDX-License-Identifier: GPL-2.0-or-later
10 #include <linux/rfkill.h>
15 #include <linux/gpio/consumer.h>
23 	struct rfkill		*rfkill_dev;
31 	struct rfkill_gpio_data *rfkill = data;  in rfkill_gpio_set_power()  local
33 	if (!blocked && !IS_ERR(rfkill->clk) && !rfkill->clk_enabled)  in rfkill_gpio_set_power()
34 		clk_enable(rfkill->clk);  in rfkill_gpio_set_power()
36 	gpiod_set_value_cansleep(rfkill->shutdown_gpio, !blocked);  in rfkill_gpio_set_power()
37 	gpiod_set_value_cansleep(rfkill->reset_gpio, !blocked);  in rfkill_gpio_set_power()
39 	if (blocked && !IS_ERR(rfkill->clk) && rfkill->clk_enabled)  in rfkill_gpio_set_power()
40 		clk_disable(rfkill->clk);  in rfkill_gpio_set_power()
42 	rfkill->clk_enabled = !blocked;  in rfkill_gpio_set_power()
55 	{ "reset-gpios", &reset_gpios, 1 },
56 	{ "shutdown-gpios", &shutdown_gpios, 1 },
61 				  struct rfkill_gpio_data *rfkill)  in rfkill_gpio_acpi_probe()  argument
65 	id = acpi_match_device(dev->driver->acpi_match_table, dev);  in rfkill_gpio_acpi_probe()
67 		return -ENODEV;  in rfkill_gpio_acpi_probe()
69 	rfkill->type = (unsigned)id->driver_data;  in rfkill_gpio_acpi_probe()
76 	struct rfkill_gpio_data *rfkill;  in rfkill_gpio_probe()  local
77 	struct gpio_desc *gpio;  in rfkill_gpio_probe()  local
81 	rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);  in rfkill_gpio_probe()
82 	if (!rfkill)  in rfkill_gpio_probe()
83 		return -ENOMEM;  in rfkill_gpio_probe()
85 	device_property_read_string(&pdev->dev, "name", &rfkill->name);  in rfkill_gpio_probe()
86 	device_property_read_string(&pdev->dev, "type", &type_name);  in rfkill_gpio_probe()
88 	if (!rfkill->name)  in rfkill_gpio_probe()
89 		rfkill->name = dev_name(&pdev->dev);  in rfkill_gpio_probe()
91 	rfkill->type = rfkill_find_type(type_name);  in rfkill_gpio_probe()
93 	if (ACPI_HANDLE(&pdev->dev)) {  in rfkill_gpio_probe()
94 		ret = rfkill_gpio_acpi_probe(&pdev->dev, rfkill);  in rfkill_gpio_probe()
99 	rfkill->clk = devm_clk_get(&pdev->dev, NULL);  in rfkill_gpio_probe()
101 	gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_ASIS);  in rfkill_gpio_probe()
102 	if (IS_ERR(gpio))  in rfkill_gpio_probe()
103 		return PTR_ERR(gpio);  in rfkill_gpio_probe()
105 	rfkill->reset_gpio = gpio;  in rfkill_gpio_probe()
107 	gpio = devm_gpiod_get_optional(&pdev->dev, "shutdown", GPIOD_ASIS);  in rfkill_gpio_probe()
108 	if (IS_ERR(gpio))  in rfkill_gpio_probe()
109 		return PTR_ERR(gpio);  in rfkill_gpio_probe()
111 	rfkill->shutdown_gpio = gpio;  in rfkill_gpio_probe()
113 	/* Make sure at-least one GPIO is defined for this instance */  in rfkill_gpio_probe()
114 	if (!rfkill->reset_gpio && !rfkill->shutdown_gpio) {  in rfkill_gpio_probe()
115 		dev_err(&pdev->dev, "invalid platform data\n");  in rfkill_gpio_probe()
116 		return -EINVAL;  in rfkill_gpio_probe()
119 	ret = gpiod_direction_output(rfkill->reset_gpio, true);  in rfkill_gpio_probe()
123 	ret = gpiod_direction_output(rfkill->shutdown_gpio, true);  in rfkill_gpio_probe()
127 	rfkill->rfkill_dev = rfkill_alloc(rfkill->name, &pdev->dev,  in rfkill_gpio_probe()
128 					  rfkill->type, &rfkill_gpio_ops,  in rfkill_gpio_probe()
129 					  rfkill);  in rfkill_gpio_probe()
130 	if (!rfkill->rfkill_dev)  in rfkill_gpio_probe()
131 		return -ENOMEM;  in rfkill_gpio_probe()
133 	ret = rfkill_register(rfkill->rfkill_dev);  in rfkill_gpio_probe()
137 	platform_set_drvdata(pdev, rfkill);  in rfkill_gpio_probe()
139 	dev_info(&pdev->dev, "%s device registered.\n", rfkill->name);  in rfkill_gpio_probe()
144 	rfkill_destroy(rfkill->rfkill_dev);  in rfkill_gpio_probe()
151 	struct rfkill_gpio_data *rfkill = platform_get_drvdata(pdev);  in rfkill_gpio_remove()  local
153 	rfkill_unregister(rfkill->rfkill_dev);  in rfkill_gpio_remove()
154 	rfkill_destroy(rfkill->rfkill_dev);  in rfkill_gpio_remove()
179 MODULE_DESCRIPTION("gpio rfkill");