1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) ST-Ericsson SA 2010
5  * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
61  * struct stmpe_keypad_variant - model-specific attributes
63  *		    auto-increments on multiple read
64  * @set_pullup: whether the pins need to have their pull-ups set
90 		.col_gpios		= 0x000ff,	/* GPIO 0 - 7 */
91 		.row_gpios		= 0x0ff00,	/* GPIO 8 - 15 */
100 		.col_gpios		= 0x0000ff,	/* GPIO 0 - 7*/
101 		.row_gpios		= 0x1f7f00,	/* GPIO 8-14, 16-20 */
110 		.col_gpios		= 0x0000ff,	/* GPIO 0 - 7*/
111 		.row_gpios		= 0x1fef00,	/* GPIO 8-14, 16-20 */
116  * struct stmpe_keypad - STMPE keypad state container
143 	const struct stmpe_keypad_variant *variant = keypad->variant;  in stmpe_keypad_read_data()
144 	struct stmpe *stmpe = keypad->stmpe;  in stmpe_keypad_read_data()
148 	if (variant->auto_increment)  in stmpe_keypad_read_data()
150 					variant->num_data, data);  in stmpe_keypad_read_data()
152 	for (i = 0; i < variant->num_data; i++) {  in stmpe_keypad_read_data()
166 	struct input_dev *input = keypad->input;  in stmpe_keypad_irq()
167 	const struct stmpe_keypad_variant *variant = keypad->variant;  in stmpe_keypad_irq()
176 	for (i = 0; i < variant->num_normal_data; i++) {  in stmpe_keypad_irq()
188 		input_report_key(input, keypad->keymap[code], !up);  in stmpe_keypad_irq()
197 	const struct stmpe_keypad_variant *variant = keypad->variant;  in stmpe_keypad_altfunc_init()
198 	unsigned int col_gpios = variant->col_gpios;  in stmpe_keypad_altfunc_init()
199 	unsigned int row_gpios = variant->row_gpios;  in stmpe_keypad_altfunc_init()
200 	struct stmpe *stmpe = keypad->stmpe;  in stmpe_keypad_altfunc_init()
201 	u8 pureg = stmpe->regs[STMPE_IDX_GPPUR_LSB];  in stmpe_keypad_altfunc_init()
214 	 * keypad->{cols,rows} are a bitmask of which pins (of the ones useable  in stmpe_keypad_altfunc_init()
218 	for (i = 0; i < variant->max_cols; i++) {  in stmpe_keypad_altfunc_init()
221 		if (keypad->cols & (1 << i)) {  in stmpe_keypad_altfunc_init()
229 	for (i = 0; i < variant->max_rows; i++) {  in stmpe_keypad_altfunc_init()
232 		if (keypad->rows & (1 << i))  in stmpe_keypad_altfunc_init()
243 	 * On STMPE24xx, set pin bias to pull-up on all keypad input  in stmpe_keypad_altfunc_init()
245 	 * and placed at GPIO0-7 so only the LSB of the pull up register  in stmpe_keypad_altfunc_init()
248 	if (variant->set_pullup) {  in stmpe_keypad_altfunc_init()
267 	const struct stmpe_keypad_variant *variant = keypad->variant;  in stmpe_keypad_chip_init()
268 	struct stmpe *stmpe = keypad->stmpe;  in stmpe_keypad_chip_init()
271 	if (keypad->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE)  in stmpe_keypad_chip_init()
272 		return -EINVAL;  in stmpe_keypad_chip_init()
274 	if (keypad->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT)  in stmpe_keypad_chip_init()
275 		return -EINVAL;  in stmpe_keypad_chip_init()
285 	ret = stmpe_reg_write(stmpe, STMPE_KPC_COL, keypad->cols);  in stmpe_keypad_chip_init()
289 	ret = stmpe_reg_write(stmpe, STMPE_KPC_ROW_LSB, keypad->rows);  in stmpe_keypad_chip_init()
293 	if (variant->max_rows > 8) {  in stmpe_keypad_chip_init()
296 				     keypad->rows >> 8);  in stmpe_keypad_chip_init()
303 			     keypad->scan_count << 4);  in stmpe_keypad_chip_init()
311 			      (keypad->debounce_ms << 1));  in stmpe_keypad_chip_init()
323 			if (keypad->keymap[code] != KEY_RESERVED) {  in stmpe_keypad_fill_used_pins()
324 				keypad->rows |= 1 << row;  in stmpe_keypad_fill_used_pins()
325 				keypad->cols |= 1 << col;  in stmpe_keypad_fill_used_pins()
333 	struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);  in stmpe_keypad_probe()
334 	struct device_node *np = pdev->dev.of_node;  in stmpe_keypad_probe()
346 	keypad = devm_kzalloc(&pdev->dev, sizeof(struct stmpe_keypad),  in stmpe_keypad_probe()
349 		return -ENOMEM;  in stmpe_keypad_probe()
351 	keypad->stmpe = stmpe;  in stmpe_keypad_probe()
352 	keypad->variant = &stmpe_keypad_variants[stmpe->partnum];  in stmpe_keypad_probe()
354 	of_property_read_u32(np, "debounce-interval", &keypad->debounce_ms);  in stmpe_keypad_probe()
355 	of_property_read_u32(np, "st,scan-count", &keypad->scan_count);  in stmpe_keypad_probe()
356 	keypad->no_autorepeat = of_property_read_bool(np, "st,no-autorepeat");  in stmpe_keypad_probe()
358 	input = devm_input_allocate_device(&pdev->dev);  in stmpe_keypad_probe()
360 		return -ENOMEM;  in stmpe_keypad_probe()
362 	input->name = "STMPE keypad";  in stmpe_keypad_probe()
363 	input->id.bustype = BUS_I2C;  in stmpe_keypad_probe()
364 	input->dev.parent = &pdev->dev;  in stmpe_keypad_probe()
366 	error = matrix_keypad_parse_properties(&pdev->dev, &rows, &cols);  in stmpe_keypad_probe()
371 					   keypad->keymap, input);  in stmpe_keypad_probe()
376 	if (!keypad->no_autorepeat)  in stmpe_keypad_probe()
377 		__set_bit(EV_REP, input->evbit);  in stmpe_keypad_probe()
381 	keypad->input = input;  in stmpe_keypad_probe()
387 	error = devm_request_threaded_irq(&pdev->dev, irq,  in stmpe_keypad_probe()
389 					  IRQF_ONESHOT, "stmpe-keypad", keypad);  in stmpe_keypad_probe()
391 		dev_err(&pdev->dev, "unable to get irq: %d\n", error);  in stmpe_keypad_probe()
397 		dev_err(&pdev->dev,  in stmpe_keypad_probe()
411 	stmpe_disable(keypad->stmpe, STMPE_BLOCK_KEYPAD);  in stmpe_keypad_remove()
415 	.driver.name	= "stmpe-keypad",