1 // SPDX-License-Identifier: GPL-2.0-only
5  *  Copyright (C) 2007-2010 Gabor Juhos <juhosg@openwrt.org>
26 #define DRV_NAME	"gpio-keys-polled"
45 				   const struct gpio_keys_button *button,  in gpio_keys_button_event()  argument
49 	unsigned int type = button->type ?: EV_KEY;  in gpio_keys_button_event()
53 			input_event(input, type, button->code, button->value);  in gpio_keys_button_event()
54 			__set_bit(button->code, bdev->rel_axis_seen);  in gpio_keys_button_event()
58 			input_event(input, type, button->code, button->value);  in gpio_keys_button_event()
59 			__set_bit(button->code, bdev->abs_axis_seen);  in gpio_keys_button_event()
62 		input_event(input, type, button->code, state);  in gpio_keys_button_event()
68 					 const struct gpio_keys_button *button,  in gpio_keys_polled_check_state()  argument
73 	state = gpiod_get_value_cansleep(bdata->gpiod);  in gpio_keys_polled_check_state()
75 		dev_err(input->dev.parent,  in gpio_keys_polled_check_state()
78 		gpio_keys_button_event(input, button, state);  in gpio_keys_polled_check_state()
80 		if (state != bdata->last_state) {  in gpio_keys_polled_check_state()
81 			bdata->count = 0;  in gpio_keys_polled_check_state()
82 			bdata->last_state = state;  in gpio_keys_polled_check_state()
90 	const struct gpio_keys_platform_data *pdata = bdev->pdata;  in gpio_keys_polled_poll()
93 	memset(bdev->rel_axis_seen, 0, sizeof(bdev->rel_axis_seen));  in gpio_keys_polled_poll()
94 	memset(bdev->abs_axis_seen, 0, sizeof(bdev->abs_axis_seen));  in gpio_keys_polled_poll()
96 	for (i = 0; i < pdata->nbuttons; i++) {  in gpio_keys_polled_poll()
97 		struct gpio_keys_button_data *bdata = &bdev->data[i];  in gpio_keys_polled_poll()
99 		if (bdata->count < bdata->threshold) {  in gpio_keys_polled_poll()
100 			bdata->count++;  in gpio_keys_polled_poll()
101 			gpio_keys_button_event(input, &pdata->buttons[i],  in gpio_keys_polled_poll()
102 					       bdata->last_state);  in gpio_keys_polled_poll()
104 			gpio_keys_polled_check_state(input, &pdata->buttons[i],  in gpio_keys_polled_poll()
109 	for_each_set_bit(i, input->relbit, REL_CNT) {  in gpio_keys_polled_poll()
110 		if (!test_bit(i, bdev->rel_axis_seen))  in gpio_keys_polled_poll()
114 	for_each_set_bit(i, input->absbit, ABS_CNT) {  in gpio_keys_polled_poll()
115 		if (!test_bit(i, bdev->abs_axis_seen))  in gpio_keys_polled_poll()
125 	const struct gpio_keys_platform_data *pdata = bdev->pdata;  in gpio_keys_polled_open()
127 	if (pdata->enable)  in gpio_keys_polled_open()
128 		pdata->enable(bdev->dev);  in gpio_keys_polled_open()
136 	const struct gpio_keys_platform_data *pdata = bdev->pdata;  in gpio_keys_polled_close()
138 	if (pdata->disable)  in gpio_keys_polled_close()
139 		pdata->disable(bdev->dev);  in gpio_keys_polled_close()
146 	struct gpio_keys_button *button;  in gpio_keys_polled_get_devtree_pdata()  local
151 		return ERR_PTR(-EINVAL);  in gpio_keys_polled_get_devtree_pdata()
153 	pdata = devm_kzalloc(dev, sizeof(*pdata) + nbuttons * sizeof(*button),  in gpio_keys_polled_get_devtree_pdata()
156 		return ERR_PTR(-ENOMEM);  in gpio_keys_polled_get_devtree_pdata()
158 	button = (struct gpio_keys_button *)(pdata + 1);  in gpio_keys_polled_get_devtree_pdata()
160 	pdata->buttons = button;  in gpio_keys_polled_get_devtree_pdata()
161 	pdata->nbuttons = nbuttons;  in gpio_keys_polled_get_devtree_pdata()
163 	pdata->rep = device_property_present(dev, "autorepeat");  in gpio_keys_polled_get_devtree_pdata()
164 	device_property_read_u32(dev, "poll-interval", &pdata->poll_interval);  in gpio_keys_polled_get_devtree_pdata()
166 	device_property_read_string(dev, "label", &pdata->name);  in gpio_keys_polled_get_devtree_pdata()
170 					     &button->code)) {  in gpio_keys_polled_get_devtree_pdata()
171 			dev_err(dev, "button without keycode\n");  in gpio_keys_polled_get_devtree_pdata()
172 			return ERR_PTR(-EINVAL);  in gpio_keys_polled_get_devtree_pdata()
175 		fwnode_property_read_string(child, "label", &button->desc);  in gpio_keys_polled_get_devtree_pdata()
177 		if (fwnode_property_read_u32(child, "linux,input-type",  in gpio_keys_polled_get_devtree_pdata()
178 					     &button->type))  in gpio_keys_polled_get_devtree_pdata()
179 			button->type = EV_KEY;  in gpio_keys_polled_get_devtree_pdata()
181 		if (fwnode_property_read_u32(child, "linux,input-value",  in gpio_keys_polled_get_devtree_pdata()
182 					     (u32 *)&button->value))  in gpio_keys_polled_get_devtree_pdata()
183 			button->value = 1;  in gpio_keys_polled_get_devtree_pdata()
185 		button->wakeup =  in gpio_keys_polled_get_devtree_pdata()
186 			fwnode_property_read_bool(child, "wakeup-source") ||  in gpio_keys_polled_get_devtree_pdata()
188 			fwnode_property_read_bool(child, "gpio-key,wakeup");  in gpio_keys_polled_get_devtree_pdata()
190 		if (fwnode_property_read_u32(child, "debounce-interval",  in gpio_keys_polled_get_devtree_pdata()
191 					     &button->debounce_interval))  in gpio_keys_polled_get_devtree_pdata()
192 			button->debounce_interval = 5;  in gpio_keys_polled_get_devtree_pdata()
194 		button++;  in gpio_keys_polled_get_devtree_pdata()
205 	for (i = 0; i < pdata->nbuttons; i++) {  in gpio_keys_polled_set_abs_params()
206 		const struct gpio_keys_button *button = &pdata->buttons[i];  in gpio_keys_polled_set_abs_params()  local
208 		if (button->type != EV_ABS || button->code != code)  in gpio_keys_polled_set_abs_params()
211 		if (button->value < min)  in gpio_keys_polled_set_abs_params()
212 			min = button->value;  in gpio_keys_polled_set_abs_params()
213 		if (button->value > max)  in gpio_keys_polled_set_abs_params()
214 			max = button->value;  in gpio_keys_polled_set_abs_params()
221 	{ .compatible = "gpio-keys-polled", },
228 	struct device *dev = &pdev->dev;  in gpio_keys_polled_probe()
242 	if (!pdata->poll_interval) {  in gpio_keys_polled_probe()
244 		return -EINVAL;  in gpio_keys_polled_probe()
247 	bdev = devm_kzalloc(dev, struct_size(bdev, data, pdata->nbuttons),  in gpio_keys_polled_probe()
251 		return -ENOMEM;  in gpio_keys_polled_probe()
257 		return -ENOMEM;  in gpio_keys_polled_probe()
262 	input->name = pdata->name ?: pdev->name;  in gpio_keys_polled_probe()
263 	input->phys = DRV_NAME"/input0";  in gpio_keys_polled_probe()
265 	input->id.bustype = BUS_HOST;  in gpio_keys_polled_probe()
266 	input->id.vendor = 0x0001;  in gpio_keys_polled_probe()
267 	input->id.product = 0x0001;  in gpio_keys_polled_probe()
268 	input->id.version = 0x0100;  in gpio_keys_polled_probe()
270 	input->open = gpio_keys_polled_open;  in gpio_keys_polled_probe()
271 	input->close = gpio_keys_polled_close;  in gpio_keys_polled_probe()
273 	__set_bit(EV_KEY, input->evbit);  in gpio_keys_polled_probe()
274 	if (pdata->rep)  in gpio_keys_polled_probe()
275 		__set_bit(EV_REP, input->evbit);  in gpio_keys_polled_probe()
277 	for (i = 0; i < pdata->nbuttons; i++) {  in gpio_keys_polled_probe()
278 		const struct gpio_keys_button *button = &pdata->buttons[i];  in gpio_keys_polled_probe()  local
279 		struct gpio_keys_button_data *bdata = &bdev->data[i];  in gpio_keys_polled_probe()
280 		unsigned int type = button->type ?: EV_KEY;  in gpio_keys_polled_probe()
282 		if (button->wakeup) {  in gpio_keys_polled_probe()
285 			return -EINVAL;  in gpio_keys_polled_probe()
293 				return -EINVAL;  in gpio_keys_polled_probe()
296 			bdata->gpiod = devm_fwnode_gpiod_get(dev, child,  in gpio_keys_polled_probe()
298 							     button->desc);  in gpio_keys_polled_probe()
299 			if (IS_ERR(bdata->gpiod)) {  in gpio_keys_polled_probe()
301 				return dev_err_probe(dev, PTR_ERR(bdata->gpiod),  in gpio_keys_polled_probe()
304 		} else if (gpio_is_valid(button->gpio)) {  in gpio_keys_polled_probe()
311 			if (button->active_low)  in gpio_keys_polled_probe()
314 			error = devm_gpio_request_one(dev, button->gpio,  in gpio_keys_polled_probe()
315 					flags, button->desc ? : DRV_NAME);  in gpio_keys_polled_probe()
319 						     button->gpio);  in gpio_keys_polled_probe()
321 			bdata->gpiod = gpio_to_desc(button->gpio);  in gpio_keys_polled_probe()
322 			if (!bdata->gpiod) {  in gpio_keys_polled_probe()
325 					button->gpio);  in gpio_keys_polled_probe()
326 				return -EINVAL;  in gpio_keys_polled_probe()
330 		bdata->last_state = -1;  in gpio_keys_polled_probe()
331 		bdata->threshold = DIV_ROUND_UP(button->debounce_interval,  in gpio_keys_polled_probe()
332 						pdata->poll_interval);  in gpio_keys_polled_probe()
334 		input_set_capability(input, type, button->code);  in gpio_keys_polled_probe()
337 							button->code);  in gpio_keys_polled_probe()
342 	bdev->input = input;  in gpio_keys_polled_probe()
343 	bdev->dev = dev;  in gpio_keys_polled_probe()
344 	bdev->pdata = pdata;  in gpio_keys_polled_probe()
352 	input_set_poll_interval(input, pdata->poll_interval);  in gpio_keys_polled_probe()
362 	for (i = 0; i < pdata->nbuttons; i++)  in gpio_keys_polled_probe()
363 		gpio_keys_polled_check_state(input, &pdata->buttons[i],  in gpio_keys_polled_probe()
364 					     &bdev->data[i]);  in gpio_keys_polled_probe()