1 // SPDX-License-Identifier: GPL-2.0-or-later
11 #include <linux/rfkill.h>
17 #include <linux/gpio/consumer.h>
25 	struct rfkill		*rfkill_dev;
33 	struct rfkill_gpio_data *rfkill = data;  in rfkill_gpio_set_power()  local
35 	if (!blocked && !IS_ERR(rfkill->clk) && !rfkill->clk_enabled)  in rfkill_gpio_set_power()
36 		clk_enable(rfkill->clk);  in rfkill_gpio_set_power()
38 	gpiod_set_value_cansleep(rfkill->shutdown_gpio, !blocked);  in rfkill_gpio_set_power()
39 	gpiod_set_value_cansleep(rfkill->reset_gpio, !blocked);  in rfkill_gpio_set_power()
41 	if (blocked && !IS_ERR(rfkill->clk) && rfkill->clk_enabled)  in rfkill_gpio_set_power()
42 		clk_disable(rfkill->clk);  in rfkill_gpio_set_power()
44 	rfkill->clk_enabled = !blocked;  in rfkill_gpio_set_power()
57 	{ "reset-gpios", &reset_gpios, 1 },
58 	{ "shutdown-gpios", &shutdown_gpios, 1 },
63 				  struct rfkill_gpio_data *rfkill)  in rfkill_gpio_acpi_probe()  argument
67 	id = acpi_match_device(dev->driver->acpi_match_table, dev);  in rfkill_gpio_acpi_probe()
69 		return -ENODEV;  in rfkill_gpio_acpi_probe()
71 	rfkill->type = (unsigned)id->driver_data;  in rfkill_gpio_acpi_probe()
76 /* List of DMI matches for devices on which rfkill-gpio should not load,
81 		/* Lenovo Yoga Tab 3 Pro YT3-X90, bogus "BCM4752" device in DSDT */
84 			DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),
92 	struct rfkill_gpio_data *rfkill;  in rfkill_gpio_probe()  local
93 	struct gpio_desc *gpio;  in rfkill_gpio_probe()  local
100 		return -ENODEV;  in rfkill_gpio_probe()
102 	rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);  in rfkill_gpio_probe()
103 	if (!rfkill)  in rfkill_gpio_probe()
104 		return -ENOMEM;  in rfkill_gpio_probe()
106 	if (dev_of_node(&pdev->dev)) {  in rfkill_gpio_probe()
108 		type_property = "radio-type";  in rfkill_gpio_probe()
113 	device_property_read_string(&pdev->dev, name_property, &rfkill->name);  in rfkill_gpio_probe()
114 	device_property_read_string(&pdev->dev, type_property, &type_name);  in rfkill_gpio_probe()
116 	if (!rfkill->name)  in rfkill_gpio_probe()
117 		rfkill->name = dev_name(&pdev->dev);  in rfkill_gpio_probe()
119 	rfkill->type = rfkill_find_type(type_name);  in rfkill_gpio_probe()
121 	if (ACPI_HANDLE(&pdev->dev)) {  in rfkill_gpio_probe()
122 		ret = rfkill_gpio_acpi_probe(&pdev->dev, rfkill);  in rfkill_gpio_probe()
127 	rfkill->clk = devm_clk_get(&pdev->dev, NULL);  in rfkill_gpio_probe()
129 	gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_ASIS);  in rfkill_gpio_probe()
130 	if (IS_ERR(gpio))  in rfkill_gpio_probe()
131 		return PTR_ERR(gpio);  in rfkill_gpio_probe()
133 	rfkill->reset_gpio = gpio;  in rfkill_gpio_probe()
135 	gpio = devm_gpiod_get_optional(&pdev->dev, "shutdown", GPIOD_ASIS);  in rfkill_gpio_probe()
136 	if (IS_ERR(gpio))  in rfkill_gpio_probe()
137 		return PTR_ERR(gpio);  in rfkill_gpio_probe()
139 	rfkill->shutdown_gpio = gpio;  in rfkill_gpio_probe()
141 	/* Make sure at-least one GPIO is defined for this instance */  in rfkill_gpio_probe()
142 	if (!rfkill->reset_gpio && !rfkill->shutdown_gpio) {  in rfkill_gpio_probe()
143 		dev_err(&pdev->dev, "invalid platform data\n");  in rfkill_gpio_probe()
144 		return -EINVAL;  in rfkill_gpio_probe()
147 	ret = gpiod_direction_output(rfkill->reset_gpio, true);  in rfkill_gpio_probe()
151 	ret = gpiod_direction_output(rfkill->shutdown_gpio, true);  in rfkill_gpio_probe()
155 	rfkill->rfkill_dev = rfkill_alloc(rfkill->name, &pdev->dev,  in rfkill_gpio_probe()
156 					  rfkill->type, &rfkill_gpio_ops,  in rfkill_gpio_probe()
157 					  rfkill);  in rfkill_gpio_probe()
158 	if (!rfkill->rfkill_dev)  in rfkill_gpio_probe()
159 		return -ENOMEM;  in rfkill_gpio_probe()
161 	ret = rfkill_register(rfkill->rfkill_dev);  in rfkill_gpio_probe()
165 	platform_set_drvdata(pdev, rfkill);  in rfkill_gpio_probe()
167 	dev_info(&pdev->dev, "%s device registered.\n", rfkill->name);  in rfkill_gpio_probe()
172 	rfkill_destroy(rfkill->rfkill_dev);  in rfkill_gpio_probe()
179 	struct rfkill_gpio_data *rfkill = platform_get_drvdata(pdev);  in rfkill_gpio_remove()  local
181 	rfkill_unregister(rfkill->rfkill_dev);  in rfkill_gpio_remove()
182 	rfkill_destroy(rfkill->rfkill_dev);  in rfkill_gpio_remove()
195 	{ .compatible = "rfkill-gpio", },
212 MODULE_DESCRIPTION("gpio rfkill");