input/misc/ariel-pwrbutton.c

1 // SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0-or-later
3  * Dell Wyse 3020 a.k.a. "Ariel" Power Button Driver
10 #include <linux/input.h>
28 	struct input_dev *input;  member
36 	struct spi_device *spi = priv->client;  in ec_input_read()
52 	struct spi_device *spi = priv->client;  in ec_input_interrupt()
59 		dev_err(&spi->dev, "EC read failed: %d\n", error);  in ec_input_interrupt()
63 	if (priv->msg_counter == RESP_COUNTER(response)) {  in ec_input_interrupt()
64 		dev_warn(&spi->dev, "No new data to read?\n");  in ec_input_interrupt()
68 	priv->msg_counter = RESP_COUNTER(response);  in ec_input_interrupt()
71 		dev_dbg(&spi->dev, "Ignoring message that's not kbd data\n");  in ec_input_interrupt()
78 			input_report_key(priv->input, KEY_POWER, 1);  in ec_input_interrupt()
79 			input_sync(priv->input);  in ec_input_interrupt()
82 			input_report_key(priv->input, KEY_POWER, 0);  in ec_input_interrupt()
83 			input_sync(priv->input);  in ec_input_interrupt()
86 			dev_dbg(&spi->dev, "Unknown scan code: %02x\n",  in ec_input_interrupt()
101 	if (!spi->irq) {  in ariel_pwrbutton_probe()
102 		dev_err(&spi->dev, "Missing IRQ.\n");  in ariel_pwrbutton_probe()
103 		return -EINVAL;  in ariel_pwrbutton_probe()
106 	priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL);  in ariel_pwrbutton_probe()
108 		return -ENOMEM;  in ariel_pwrbutton_probe()
110 	priv->client = spi;  in ariel_pwrbutton_probe()
113 	priv->input = devm_input_allocate_device(&spi->dev);  in ariel_pwrbutton_probe()
114 	if (!priv->input)  in ariel_pwrbutton_probe()
115 		return -ENOMEM;  in ariel_pwrbutton_probe()
116 	priv->input->name = "Power Button";  in ariel_pwrbutton_probe()
117 	priv->input->dev.parent = &spi->dev;  in ariel_pwrbutton_probe()
118 	input_set_capability(priv->input, EV_KEY, KEY_POWER);  in ariel_pwrbutton_probe()
119 	error = input_register_device(priv->input);  in ariel_pwrbutton_probe()
121 		dev_err(&spi->dev, "error registering input device: %d\n", error);  in ariel_pwrbutton_probe()
127 		dev_err(&spi->dev, "EC read failed: %d\n", error);  in ariel_pwrbutton_probe()
130 	priv->msg_counter = RESP_COUNTER(response);  in ariel_pwrbutton_probe()
132 	error = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,  in ariel_pwrbutton_probe()
135 					  "Ariel EC Input", priv);  in ariel_pwrbutton_probe()
138 		dev_err(&spi->dev, "Failed to request IRQ %d: %d\n",  in ariel_pwrbutton_probe()
139 			spi->irq, error);  in ariel_pwrbutton_probe()
147 	{ .compatible = "dell,wyse-ariel-ec-input" },
153 	{ .name = "wyse-ariel-ec-input" },
160 		.name = "dell-wyse-ariel-ec-input",
169 MODULE_DESCRIPTION("Dell Wyse 3020 Power Button Input Driver");