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
152 		return ERR_PTR(-EINVAL);  in gpio_keys_polled_get_devtree_pdata()
154 	pdata = devm_kzalloc(dev, sizeof(*pdata) + nbuttons * sizeof(*button),  in gpio_keys_polled_get_devtree_pdata()
157 		return ERR_PTR(-ENOMEM);  in gpio_keys_polled_get_devtree_pdata()
159 	button = (struct gpio_keys_button *)(pdata + 1);  in gpio_keys_polled_get_devtree_pdata()
161 	pdata->buttons = button;  in gpio_keys_polled_get_devtree_pdata()
162 	pdata->nbuttons = nbuttons;  in gpio_keys_polled_get_devtree_pdata()
164 	pdata->rep = device_property_present(dev, "autorepeat");  in gpio_keys_polled_get_devtree_pdata()
165 	device_property_read_u32(dev, "poll-interval", &pdata->poll_interval);  in gpio_keys_polled_get_devtree_pdata()
167 	device_property_read_string(dev, "label", &pdata->name);  in gpio_keys_polled_get_devtree_pdata()
171 					     &button->code)) {  in gpio_keys_polled_get_devtree_pdata()
172 			dev_err(dev, "button without keycode\n");  in gpio_keys_polled_get_devtree_pdata()
174 			return ERR_PTR(-EINVAL);  in gpio_keys_polled_get_devtree_pdata()
177 		fwnode_property_read_string(child, "label", &button->desc);  in gpio_keys_polled_get_devtree_pdata()
179 		if (fwnode_property_read_u32(child, "linux,input-type",  in gpio_keys_polled_get_devtree_pdata()
180 					     &button->type))  in gpio_keys_polled_get_devtree_pdata()
181 			button->type = EV_KEY;  in gpio_keys_polled_get_devtree_pdata()
183 		if (fwnode_property_read_u32(child, "linux,input-value",  in gpio_keys_polled_get_devtree_pdata()
184 					     (u32 *)&button->value))  in gpio_keys_polled_get_devtree_pdata()
185 			button->value = 1;  in gpio_keys_polled_get_devtree_pdata()
187 		button->wakeup =  in gpio_keys_polled_get_devtree_pdata()
188 			fwnode_property_read_bool(child, "wakeup-source") ||  in gpio_keys_polled_get_devtree_pdata()
190 			fwnode_property_read_bool(child, "gpio-key,wakeup");  in gpio_keys_polled_get_devtree_pdata()
192 		if (fwnode_property_read_u32(child, "debounce-interval",  in gpio_keys_polled_get_devtree_pdata()
193 					     &button->debounce_interval))  in gpio_keys_polled_get_devtree_pdata()
194 			button->debounce_interval = 5;  in gpio_keys_polled_get_devtree_pdata()
196 		button++;  in gpio_keys_polled_get_devtree_pdata()
207 	for (i = 0; i < pdata->nbuttons; i++) {  in gpio_keys_polled_set_abs_params()
208 		const struct gpio_keys_button *button = &pdata->buttons[i];  in gpio_keys_polled_set_abs_params()  local
210 		if (button->type != EV_ABS || button->code != code)  in gpio_keys_polled_set_abs_params()
213 		if (button->value < min)  in gpio_keys_polled_set_abs_params()
214 			min = button->value;  in gpio_keys_polled_set_abs_params()
215 		if (button->value > max)  in gpio_keys_polled_set_abs_params()
216 			max = button->value;  in gpio_keys_polled_set_abs_params()
223 	{ .compatible = "gpio-keys-polled", },
230 	struct device *dev = &pdev->dev;  in gpio_keys_polled_probe()
244 	if (!pdata->poll_interval) {  in gpio_keys_polled_probe()
246 		return -EINVAL;  in gpio_keys_polled_probe()
249 	bdev = devm_kzalloc(dev, struct_size(bdev, data, pdata->nbuttons),  in gpio_keys_polled_probe()
253 		return -ENOMEM;  in gpio_keys_polled_probe()
259 		return -ENOMEM;  in gpio_keys_polled_probe()
264 	input->name = pdata->name ?: pdev->name;  in gpio_keys_polled_probe()
265 	input->phys = DRV_NAME"/input0";  in gpio_keys_polled_probe()
267 	input->id.bustype = BUS_HOST;  in gpio_keys_polled_probe()
268 	input->id.vendor = 0x0001;  in gpio_keys_polled_probe()
269 	input->id.product = 0x0001;  in gpio_keys_polled_probe()
270 	input->id.version = 0x0100;  in gpio_keys_polled_probe()
272 	input->open = gpio_keys_polled_open;  in gpio_keys_polled_probe()
273 	input->close = gpio_keys_polled_close;  in gpio_keys_polled_probe()
275 	__set_bit(EV_KEY, input->evbit);  in gpio_keys_polled_probe()
276 	if (pdata->rep)  in gpio_keys_polled_probe()
277 		__set_bit(EV_REP, input->evbit);  in gpio_keys_polled_probe()
279 	for (i = 0; i < pdata->nbuttons; i++) {  in gpio_keys_polled_probe()
280 		const struct gpio_keys_button *button = &pdata->buttons[i];  in gpio_keys_polled_probe()  local
281 		struct gpio_keys_button_data *bdata = &bdev->data[i];  in gpio_keys_polled_probe()
282 		unsigned int type = button->type ?: EV_KEY;  in gpio_keys_polled_probe()
284 		if (button->wakeup) {  in gpio_keys_polled_probe()
287 			return -EINVAL;  in gpio_keys_polled_probe()
295 				return -EINVAL;  in gpio_keys_polled_probe()
298 			bdata->gpiod = devm_fwnode_gpiod_get(dev, child,  in gpio_keys_polled_probe()
300 							     button->desc);  in gpio_keys_polled_probe()
301 			if (IS_ERR(bdata->gpiod)) {  in gpio_keys_polled_probe()
303 				return dev_err_probe(dev, PTR_ERR(bdata->gpiod),  in gpio_keys_polled_probe()
306 		} else if (gpio_is_valid(button->gpio)) {  in gpio_keys_polled_probe()
313 			if (button->active_low)  in gpio_keys_polled_probe()
316 			error = devm_gpio_request_one(dev, button->gpio,  in gpio_keys_polled_probe()
317 					flags, button->desc ? : DRV_NAME);  in gpio_keys_polled_probe()
321 					button->gpio, error);  in gpio_keys_polled_probe()
325 			bdata->gpiod = gpio_to_desc(button->gpio);  in gpio_keys_polled_probe()
326 			if (!bdata->gpiod) {  in gpio_keys_polled_probe()
329 					button->gpio);  in gpio_keys_polled_probe()
330 				return -EINVAL;  in gpio_keys_polled_probe()
334 		bdata->last_state = -1;  in gpio_keys_polled_probe()
335 		bdata->threshold = DIV_ROUND_UP(button->debounce_interval,  in gpio_keys_polled_probe()
336 						pdata->poll_interval);  in gpio_keys_polled_probe()
338 		input_set_capability(input, type, button->code);  in gpio_keys_polled_probe()
341 							button->code);  in gpio_keys_polled_probe()
346 	bdev->input = input;  in gpio_keys_polled_probe()
347 	bdev->dev = dev;  in gpio_keys_polled_probe()
348 	bdev->pdata = pdata;  in gpio_keys_polled_probe()
356 	input_set_poll_interval(input, pdata->poll_interval);  in gpio_keys_polled_probe()
366 	for (i = 0; i < pdata->nbuttons; i++)  in gpio_keys_polled_probe()
367 		gpio_keys_polled_check_state(input, &pdata->buttons[i],  in gpio_keys_polled_probe()
368 					     &bdev->data[i]);  in gpio_keys_polled_probe()