1 // SPDX-License-Identifier: GPL-2.0-only
3  * Input driver for Microchip CAP11xx based capacitive touch sensors
185 	ret = regmap_update_bits(priv->regmap, CAP11XX_REG_MAIN_CONTROL, 1, 0);  in cap11xx_thread_func()
189 	ret = regmap_read(priv->regmap, CAP11XX_REG_SENSOR_INPUT, &status);  in cap11xx_thread_func()
193 	for (i = 0; i < priv->idev->keycodemax; i++)  in cap11xx_thread_func()
194 		input_report_key(priv->idev, priv->keycodes[i],  in cap11xx_thread_func()
197 	input_sync(priv->idev);  in cap11xx_thread_func()
208 	if (IS_ENABLED(CONFIG_LEDS_CLASS) && priv->num_leds)  in cap11xx_set_sleep()
211 	return regmap_update_bits(priv->regmap, CAP11XX_REG_MAIN_CONTROL,  in cap11xx_set_sleep()
235 	struct cap11xx_priv *priv = led->priv;  in cap11xx_led_set()
242 	return regmap_update_bits(priv->regmap,  in cap11xx_led_set()
244 				  BIT(led->reg),  in cap11xx_led_set()
245 				  value ? BIT(led->reg) : 0);  in cap11xx_led_set()
251 	struct device_node *node = dev->of_node, *child;  in cap11xx_init_leds()
260 		return -EINVAL;  in cap11xx_init_leds()
264 		return -ENOMEM;  in cap11xx_init_leds()
266 	priv->leds = led;  in cap11xx_init_leds()
268 	error = regmap_update_bits(priv->regmap,  in cap11xx_init_leds()
273 	error = regmap_update_bits(priv->regmap, CAP11XX_REG_LED_DUTY_CYCLE_4,  in cap11xx_init_leds()
283 		led->cdev.name =  in cap11xx_init_leds()
284 			of_get_property(child, "label", NULL) ? : child->name;  in cap11xx_init_leds()
285 		led->cdev.default_trigger =  in cap11xx_init_leds()
286 			of_get_property(child, "linux,default-trigger", NULL);  in cap11xx_init_leds()
287 		led->cdev.flags = 0;  in cap11xx_init_leds()
288 		led->cdev.brightness_set_blocking = cap11xx_led_set;  in cap11xx_init_leds()
289 		led->cdev.max_brightness = 1;  in cap11xx_init_leds()
290 		led->cdev.brightness = LED_OFF;  in cap11xx_init_leds()
295 			return -EINVAL;  in cap11xx_init_leds()
298 		led->reg = reg;  in cap11xx_init_leds()
299 		led->priv = priv;  in cap11xx_init_leds()
301 		error = devm_led_classdev_register(dev, &led->cdev);  in cap11xx_init_leds()
307 		priv->num_leds++;  in cap11xx_init_leds()
324 	struct device *dev = &i2c_client->dev;  in cap11xx_i2c_probe()
332 	if (id->driver_data >= ARRAY_SIZE(cap11xx_devices)) {  in cap11xx_i2c_probe()
333 		dev_err(dev, "Invalid device ID %lu\n", id->driver_data);  in cap11xx_i2c_probe()
334 		return -EINVAL;  in cap11xx_i2c_probe()
337 	cap = &cap11xx_devices[id->driver_data];  in cap11xx_i2c_probe()
338 	if (!cap || !cap->num_channels) {  in cap11xx_i2c_probe()
340 		return -EINVAL;  in cap11xx_i2c_probe()
344 			    struct_size(priv, keycodes, cap->num_channels),  in cap11xx_i2c_probe()
347 		return -ENOMEM;  in cap11xx_i2c_probe()
349 	priv->regmap = devm_regmap_init_i2c(i2c_client, &cap11xx_regmap_config);  in cap11xx_i2c_probe()
350 	if (IS_ERR(priv->regmap))  in cap11xx_i2c_probe()
351 		return PTR_ERR(priv->regmap);  in cap11xx_i2c_probe()
353 	error = regmap_read(priv->regmap, CAP11XX_REG_PRODUCT_ID, &val);  in cap11xx_i2c_probe()
357 	if (val != cap->product_id) {  in cap11xx_i2c_probe()
359 			val, cap->product_id);  in cap11xx_i2c_probe()
360 		return -ENXIO;  in cap11xx_i2c_probe()
363 	error = regmap_read(priv->regmap, CAP11XX_REG_MANUFACTURER_ID, &val);  in cap11xx_i2c_probe()
370 		return -ENXIO;  in cap11xx_i2c_probe()
373 	error = regmap_read(priv->regmap, CAP11XX_REG_REVISION, &rev);  in cap11xx_i2c_probe()
378 	node = dev->of_node;  in cap11xx_i2c_probe()
380 	if (!of_property_read_u32(node, "microchip,sensor-gain", &gain32)) {  in cap11xx_i2c_probe()
384 			dev_err(dev, "Invalid sensor-gain value %d\n", gain32);  in cap11xx_i2c_probe()
387 	if (of_property_read_bool(node, "microchip,irq-active-high")) {  in cap11xx_i2c_probe()
388 		error = regmap_update_bits(priv->regmap, CAP11XX_REG_CONFIG2,  in cap11xx_i2c_probe()
395 	for (i = 0; i < cap->num_channels; i++)  in cap11xx_i2c_probe()
396 		priv->keycodes[i] = KEY_A + i;  in cap11xx_i2c_probe()
399 				   priv->keycodes, cap->num_channels);  in cap11xx_i2c_probe()
401 	error = regmap_update_bits(priv->regmap, CAP11XX_REG_MAIN_CONTROL,  in cap11xx_i2c_probe()
408 	error = regmap_write(priv->regmap, CAP11XX_REG_REPEAT_RATE, 0);  in cap11xx_i2c_probe()
412 	priv->idev = devm_input_allocate_device(dev);  in cap11xx_i2c_probe()
413 	if (!priv->idev)  in cap11xx_i2c_probe()
414 		return -ENOMEM;  in cap11xx_i2c_probe()
416 	priv->idev->name = "CAP11XX capacitive touch sensor";  in cap11xx_i2c_probe()
417 	priv->idev->id.bustype = BUS_I2C;  in cap11xx_i2c_probe()
418 	priv->idev->evbit[0] = BIT_MASK(EV_KEY);  in cap11xx_i2c_probe()
421 		__set_bit(EV_REP, priv->idev->evbit);  in cap11xx_i2c_probe()
423 	for (i = 0; i < cap->num_channels; i++)  in cap11xx_i2c_probe()
424 		__set_bit(priv->keycodes[i], priv->idev->keybit);  in cap11xx_i2c_probe()
426 	__clear_bit(KEY_RESERVED, priv->idev->keybit);  in cap11xx_i2c_probe()
428 	priv->idev->keycode = priv->keycodes;  in cap11xx_i2c_probe()
429 	priv->idev->keycodesize = sizeof(priv->keycodes[0]);  in cap11xx_i2c_probe()
430 	priv->idev->keycodemax = cap->num_channels;  in cap11xx_i2c_probe()
432 	priv->idev->id.vendor = CAP11XX_MANUFACTURER_ID;  in cap11xx_i2c_probe()
433 	priv->idev->id.product = cap->product_id;  in cap11xx_i2c_probe()
434 	priv->idev->id.version = rev;  in cap11xx_i2c_probe()
436 	priv->idev->open = cap11xx_input_open;  in cap11xx_i2c_probe()
437 	priv->idev->close = cap11xx_input_close;  in cap11xx_i2c_probe()
439 	error = cap11xx_init_leds(dev, priv, cap->num_leds);  in cap11xx_i2c_probe()
443 	input_set_drvdata(priv->idev, priv);  in cap11xx_i2c_probe()
446 	 * Put the device in deep sleep mode for now.  in cap11xx_i2c_probe()
447 	 * ->open() will bring it back once the it is actually needed.  in cap11xx_i2c_probe()
451 	error = input_register_device(priv->idev);  in cap11xx_i2c_probe()
458 		return -ENXIO;  in cap11xx_i2c_probe()