1 // SPDX-License-Identifier: GPL-2.0-or-later
53  * Errata i689: If a key is released for a time shorter than debounce time,
54  * the keyboard will idle and never detect the key release. The workaround
55  * is to use at least a 12ms debounce time. See omap5432 TRM chapter
60 	((((dbms) * 1000) / ((1 << ((ptv) + 1)) * (1000000 / 32768))) - 1)
90 	return __raw_readl(keypad_data->base +  in kbd_readl()
91 				keypad_data->reg_offset + offset);  in kbd_readl()
97 		     keypad_data->base + keypad_data->reg_offset + offset);  in kbd_writel()
102 	return __raw_readl(keypad_data->base +  in kbd_read_irqreg()
103 				keypad_data->irqreg_offset + offset);  in kbd_read_irqreg()
110 		     keypad_data->base + keypad_data->irqreg_offset + offset);  in kbd_write_irqreg()
116 	struct input_dev *input_dev = keypad_data->input;  in omap4_keypad_report_keys()
124 	for_each_set_bit(bit, mask, keypad_data->rows * BITS_PER_BYTE) {  in omap4_keypad_report_keys()
127 		code = MATRIX_SCAN_CODE(row, col, keypad_data->row_shift);  in omap4_keypad_report_keys()
130 		input_report_key(input_dev, keypad_data->keymap[code], down);  in omap4_keypad_report_keys()
145 	mutex_lock(&keypad_data->lock);  in omap4_keypad_scan_keys()
147 	changed = keys ^ keypad_data->keys;  in omap4_keypad_scan_keys()
151 	 * lost key-up interrupt and just now catching up.  in omap4_keypad_scan_keys()
158 	keypad_data->keys = keys;  in omap4_keypad_scan_keys()
160 	mutex_unlock(&keypad_data->lock);  in omap4_keypad_scan_keys()
177 	struct device *dev = keypad_data->input->dev.parent;  in omap4_keypad_irq_thread_fn()
205 	struct device *dev = input->dev.parent;  in omap4_keypad_open()
212 	disable_irq(keypad_data->irq);  in omap4_keypad_open()
227 	enable_irq(keypad_data->irq);  in omap4_keypad_open()
237 	/* Disable interrupts and wake-up events */  in omap4_keypad_stop()
250 	struct device *dev = input->dev.parent;  in omap4_keypad_close()
258 	disable_irq(keypad_data->irq);  in omap4_keypad_close()
260 	enable_irq(keypad_data->irq);  in omap4_keypad_close()
269 	struct device_node *np = dev->of_node;  in omap4_keypad_parse_dt()
272 	err = matrix_keypad_parse_properties(dev, &keypad_data->rows,  in omap4_keypad_parse_dt()
273 					     &keypad_data->cols);  in omap4_keypad_parse_dt()
277 	keypad_data->no_autorepeat = of_property_read_bool(np, "linux,input-no-autorepeat");  in omap4_keypad_parse_dt()
287 	rev = __raw_readl(keypad_data->base + OMAP4_KBD_REVISION);  in omap4_keypad_check_revision()
292 		keypad_data->reg_offset = 0x00;  in omap4_keypad_check_revision()
293 		keypad_data->irqreg_offset = 0x00;  in omap4_keypad_check_revision()
296 		keypad_data->reg_offset = 0x10;  in omap4_keypad_check_revision()
297 		keypad_data->irqreg_offset = 0x0c;  in omap4_keypad_check_revision()
301 		return -EINVAL;  in omap4_keypad_check_revision()
309  * Interrupt may not happen for key-up events. We must clear stuck
310  * key-up events after the keyboard hardware has auto-idled.
321 		return -EBUSY;  in omap4_keypad_runtime_suspend()
341 	struct device *dev = &pdev->dev;  in omap4_keypad_probe()
355 		return -ENOMEM;  in omap4_keypad_probe()
358 	keypad_data->irq = irq;  in omap4_keypad_probe()
359 	mutex_init(&keypad_data->lock);  in omap4_keypad_probe()
366 	keypad_data->base = devm_platform_ioremap_resource(pdev, 0);  in omap4_keypad_probe()
367 	if (IS_ERR(keypad_data->base))  in omap4_keypad_probe()
368 		return PTR_ERR(keypad_data->base);  in omap4_keypad_probe()
402 	keypad_data->input = input_dev = devm_input_allocate_device(dev);  in omap4_keypad_probe()
404 		return -ENOMEM;  in omap4_keypad_probe()
406 	input_dev->name = pdev->name;  in omap4_keypad_probe()
407 	input_dev->id.bustype = BUS_HOST;  in omap4_keypad_probe()
408 	input_dev->id.vendor = 0x0001;  in omap4_keypad_probe()
409 	input_dev->id.product = 0x0001;  in omap4_keypad_probe()
410 	input_dev->id.version = 0x0001;  in omap4_keypad_probe()
412 	input_dev->open = omap4_keypad_open;  in omap4_keypad_probe()
413 	input_dev->close = omap4_keypad_close;  in omap4_keypad_probe()
416 	if (!keypad_data->no_autorepeat)  in omap4_keypad_probe()
417 		__set_bit(EV_REP, input_dev->evbit);  in omap4_keypad_probe()
421 	keypad_data->row_shift = get_count_order(keypad_data->cols);  in omap4_keypad_probe()
422 	max_keys = keypad_data->rows << keypad_data->row_shift;  in omap4_keypad_probe()
423 	keypad_data->keymap = devm_kcalloc(dev,  in omap4_keypad_probe()
425 					   sizeof(keypad_data->keymap[0]),  in omap4_keypad_probe()
427 	if (!keypad_data->keymap) {  in omap4_keypad_probe()
429 		return -ENOMEM;  in omap4_keypad_probe()
433 					   keypad_data->rows, keypad_data->cols,  in omap4_keypad_probe()
434 					   keypad_data->keymap, input_dev);  in omap4_keypad_probe()
440 	error = devm_request_threaded_irq(dev, keypad_data->irq,  in omap4_keypad_probe()
444 					  "omap4-keypad", keypad_data);  in omap4_keypad_probe()
450 	error = input_register_device(keypad_data->input);  in omap4_keypad_probe()
457 	error = dev_pm_set_wake_irq(dev, keypad_data->irq);  in omap4_keypad_probe()
466 	dev_pm_clear_wake_irq(&pdev->dev);  in omap4_keypad_remove()
472 	{ .compatible = "ti,omap4-keypad" },
481 		.name	= "omap4-keypad",
491 MODULE_ALIAS("platform:omap4-keypad");