1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) ST-Ericsson SA 2010
5  * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson
6  * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
22 #include <linux/platform_data/keypad-nomadik-ske.h>
54  * struct ske_keypad  - data structure used by keypad driver
69 	unsigned short keymap[SKE_KPD_NUM_ROWS * SKE_KPD_NUM_COLS];
80 	spin_lock(&keypad->ske_keypad_lock);  in ske_keypad_set_bits()
82 	ret = readl(keypad->reg_base + addr);  in ske_keypad_set_bits()
85 	writel(ret, keypad->reg_base + addr);  in ske_keypad_set_bits()
87 	spin_unlock(&keypad->ske_keypad_lock);  in ske_keypad_set_bits()
93  * Enable Multi key press detection, auto scan mode
98 	int timeout = keypad->board->debounce_ms;  in ske_keypad_chip_init()
101 	while ((readl(keypad->reg_base + SKE_RIS) != 0x00000000) && timeout--)  in ske_keypad_chip_init()
104 	if (timeout == -1)  in ske_keypad_chip_init()
105 		return -EINVAL;  in ske_keypad_chip_init()
110 	 * dbounce value in steps of 32/32.768 ms  in ske_keypad_chip_init()
112 	spin_lock(&keypad->ske_keypad_lock);  in ske_keypad_chip_init()
113 	value = readl(keypad->reg_base + SKE_DBCR);  in ske_keypad_chip_init()
115 	value |= ((keypad->board->debounce_ms * 32000)/32768) << 8;  in ske_keypad_chip_init()
116 	writel(value, keypad->reg_base + SKE_DBCR);  in ske_keypad_chip_init()
117 	spin_unlock(&keypad->ske_keypad_lock);  in ske_keypad_chip_init()
126 	value = (keypad->board->kcol - 1) << 3;  in ske_keypad_chip_init()
132 	/* un-mask keypad interrupts */  in ske_keypad_chip_init()
144 	struct input_dev *input = keypad->input;  in ske_keypad_report()
157 		ske_ris = readl(keypad->reg_base + SKE_RIS);  in ske_keypad_report()
161 		input_report_key(input, keypad->keymap[code], key_pressed);  in ske_keypad_report()
163 		num_of_rows--;  in ske_keypad_report()
181 		ske_asr = readl(keypad->reg_base + SKE_ASR0 + (4 * i));  in ske_keypad_read_data()
202 	int timeout = keypad->board->debounce_ms;  in ske_keypad_irq()
208 	while ((readl(keypad->reg_base + SKE_CR) & SKE_KPASON) && --timeout)  in ske_keypad_irq()
215 	while ((readl(keypad->reg_base + SKE_RIS)) && --timeout)  in ske_keypad_irq()
227 			dev_get_platdata(&pdev->dev);  in ske_keypad_probe()
235 		dev_err(&pdev->dev, "invalid keypad platform data\n");  in ske_keypad_probe()
236 		return -EINVAL;  in ske_keypad_probe()
241 		return -EINVAL;  in ske_keypad_probe()
245 		dev_err(&pdev->dev, "missing platform resources\n");  in ske_keypad_probe()
246 		return -EINVAL;  in ske_keypad_probe()
252 		dev_err(&pdev->dev, "failed to allocate keypad memory\n");  in ske_keypad_probe()
253 		error = -ENOMEM;  in ske_keypad_probe()
257 	keypad->irq = irq;  in ske_keypad_probe()
258 	keypad->board = plat;  in ske_keypad_probe()
259 	keypad->input = input;  in ske_keypad_probe()
260 	spin_lock_init(&keypad->ske_keypad_lock);  in ske_keypad_probe()
262 	if (!request_mem_region(res->start, resource_size(res), pdev->name)) {  in ske_keypad_probe()
263 		dev_err(&pdev->dev, "failed to request I/O memory\n");  in ske_keypad_probe()
264 		error = -EBUSY;  in ske_keypad_probe()
268 	keypad->reg_base = ioremap(res->start, resource_size(res));  in ske_keypad_probe()
269 	if (!keypad->reg_base) {  in ske_keypad_probe()
270 		dev_err(&pdev->dev, "failed to remap I/O memory\n");  in ske_keypad_probe()
271 		error = -ENXIO;  in ske_keypad_probe()
275 	keypad->pclk = clk_get(&pdev->dev, "apb_pclk");  in ske_keypad_probe()
276 	if (IS_ERR(keypad->pclk)) {  in ske_keypad_probe()
277 		dev_err(&pdev->dev, "failed to get pclk\n");  in ske_keypad_probe()
278 		error = PTR_ERR(keypad->pclk);  in ske_keypad_probe()
282 	keypad->clk = clk_get(&pdev->dev, NULL);  in ske_keypad_probe()
283 	if (IS_ERR(keypad->clk)) {  in ske_keypad_probe()
284 		dev_err(&pdev->dev, "failed to get clk\n");  in ske_keypad_probe()
285 		error = PTR_ERR(keypad->clk);  in ske_keypad_probe()
289 	input->id.bustype = BUS_HOST;  in ske_keypad_probe()
290 	input->name = "ux500-ske-keypad";  in ske_keypad_probe()
291 	input->dev.parent = &pdev->dev;  in ske_keypad_probe()
293 	error = matrix_keypad_build_keymap(plat->keymap_data, NULL,  in ske_keypad_probe()
295 					   keypad->keymap, input);  in ske_keypad_probe()
297 		dev_err(&pdev->dev, "Failed to build keymap\n");  in ske_keypad_probe()
302 	if (!plat->no_autorepeat)  in ske_keypad_probe()
303 		__set_bit(EV_REP, input->evbit);  in ske_keypad_probe()
305 	error = clk_prepare_enable(keypad->pclk);  in ske_keypad_probe()
307 		dev_err(&pdev->dev, "Failed to prepare/enable pclk\n");  in ske_keypad_probe()
311 	error = clk_prepare_enable(keypad->clk);  in ske_keypad_probe()
313 		dev_err(&pdev->dev, "Failed to prepare/enable clk\n");  in ske_keypad_probe()
319 	if (keypad->board->init)  in ske_keypad_probe()
320 		keypad->board->init();  in ske_keypad_probe()
324 		dev_err(&pdev->dev, "unable to init keypad hardware\n");  in ske_keypad_probe()
328 	error = request_threaded_irq(keypad->irq, NULL, ske_keypad_irq,  in ske_keypad_probe()
329 				     IRQF_ONESHOT, "ske-keypad", keypad);  in ske_keypad_probe()
331 		dev_err(&pdev->dev, "allocate irq %d failed\n", keypad->irq);  in ske_keypad_probe()
337 		dev_err(&pdev->dev,  in ske_keypad_probe()
342 	if (plat->wakeup_enable)  in ske_keypad_probe()
343 		device_init_wakeup(&pdev->dev, true);  in ske_keypad_probe()
350 	free_irq(keypad->irq, keypad);  in ske_keypad_probe()
352 	clk_disable_unprepare(keypad->clk);  in ske_keypad_probe()
354 	clk_disable_unprepare(keypad->pclk);  in ske_keypad_probe()
356 	clk_put(keypad->clk);  in ske_keypad_probe()
358 	clk_put(keypad->pclk);  in ske_keypad_probe()
360 	iounmap(keypad->reg_base);  in ske_keypad_probe()
362 	release_mem_region(res->start, resource_size(res));  in ske_keypad_probe()
374 	free_irq(keypad->irq, keypad);  in ske_keypad_remove()
376 	input_unregister_device(keypad->input);  in ske_keypad_remove()
378 	clk_disable_unprepare(keypad->clk);  in ske_keypad_remove()
379 	clk_put(keypad->clk);  in ske_keypad_remove()
381 	if (keypad->board->exit)  in ske_keypad_remove()
382 		keypad->board->exit();  in ske_keypad_remove()
384 	iounmap(keypad->reg_base);  in ske_keypad_remove()
385 	release_mem_region(res->start, resource_size(res));  in ske_keypad_remove()
426 		.name = "nmk-ske-keypad",
436 MODULE_DESCRIPTION("Nomadik Scroll-Key-Encoder Keypad Driver");
437 MODULE_ALIAS("platform:nomadik-ske-keypad");